PAW-280PAH3M Air Handling Unit Kit

Product Information: Panasonic Air Handling Unit Kit

The Panasonic Air Handling Unit Kit is designed to connect
Panasonic ECOi, ECO G, PACi, and PACi NX outdoor units to
third-party air handling unit systems using the same refrigerant
circuit as the outdoor unit. The AHU Kit is suitable for use in
large buildings such as hotels, offices, and server rooms where air
quality control, humidity control, and fresh air are required. The
AHU Kits come in different models including the PAW-160MAH2(L/M),
PAW-280MAH2(L/M), PAW-560MAH2(L/M), PAW-280PAH2(L/M), and
PAW-280PAH3M(-1).

Technical Specifications

• Refrigerant: R410A or R32 (depending on the PACi system)

• Compatible with Panasonic ECOi, ECO G, PACi, and PACi NX
  outdoor units

• Designed for use with third-party air handling unit
  systems

• Comes with expansion valve and thermistors for easy
  installation

• Suitable for use in large buildings such as hotels, offices,
  and server rooms

Safety Notes

When installing the Panasonic Air Handling Unit Kit, it is
important to follow the safety notes provided in the user manual.
These include instructions for safe handling of refrigerant R32,
preventing leakages, detecting leaks, and repairing leaks. It is
also important to follow general precautions on wiring and to match
outdoor unit capacity with AHU Kit capacity.

Product Usage Instructions

Before installing the Panasonic Air Handling Unit Kit, it is
important to review the user manual and follow the installation
instructions carefully. The user manual provides step-by-step
instructions for the installation of the AHU Kit, including
installation of refrigerant piping, expansion valve, thermistors,
and electrical wiring. It is important to match the outdoor unit
capacity with AHU Kit capacity and to follow the wiring system
diagrams provided in the user manual.

After installation, test run the AHU Kit to ensure proper
operation. The user manual also provides information on control
options including the remote controller and thermostat. Follow the
instructions for initial settings and operation of the thermostat,
and refer to the error codes section for troubleshooting if
necessary.

For further information and guidance on the Panasonic Air
Handling Unit Kit, refer to the user manual provided with the
product.

Air Handling Unit Kit
Installation Instructions

PAW-160MAH2(L/M) PAW-280MAH2(L/M) PAW-560MAH2(L/M)

PAW-280PAH2(L/M)

PAW-280PAH3M(-1)

AHU Kit ­ Installation Instructions ­ 2021 NX

Notes:

Air Handling Unit Kit
Installation Instructions
Original Installation Instructions (English) November 2021

COPYRIGHT © Panasonic Marketing Europe GmbH 2021. All rights reserved.
Copyrights and intellectual property rights The copyright of this Manual remains with the manufacturer. No part of this Manual may be reproduced or processed using electronic systems, or distributed in any form without the written consent of Panasonic Marketing Europe GmbH. Infringements which conflict with the above-mentioned information will render you liable for damages. All trademarks mentioned in this Manual are the property of the respective manufacturers and are hereby acknowledged.

AHU Kit ­ Installation Instructions ­ 11/2021

3

Contents

Table of Contents

1 General information and safety notes

6

1.1 General information

6

1.2 Safety notes

8

1.3 Instructions for the safe handling of R32

9

1.3.1 Calculating the density limit

10

1.3.2 Preventing leakages

18

1.3.3 Detecting leaks

19

1.3.4 Repairing leaks

19

1.4 Warranty policy

19

2 Ventilation theory and air handling units

20

2.1 Purpose of air-conditioning

20

2.2 Mechanical ventilation systems

21

2.3 Air handling units

21

3 Product description

24

3.1 General description

24

3.2 Scope of supply

25

3.3 System lineup

31

3.4 System Overview

33

3.5 Technical data

37

4 Installation

47

4.1 Installation of AHU Kit

47

4.1.1 MAH2/PAH2 generation

47

4.1.2 PAH3 generation

49

4.1.3 Installation of refrigerant piping

51

4.2 Installation of expansion valve

51

4.3 Installation of thermistors

53

4.3.1 Installation of thermistor on gas pipe

54

4.3.2 Installation of thermistor on liquid pipe

55

4.3.3 Installation of thermistor on heat exchanger pipe middle

55

4.3.4 Installation of thermistor for suction and discharge air stream

56

4.4 Matching outdoor unit capacity with AHU Kit capacity

56

5 Electrical Wiring

64

5.1 General precautions on wiring

64

5.2 Connection of wiring to terminals

64

5.3 Terminal board layout

66

5.3.1 MAH2/PAH2 models

66

5.3.2 PAH3M model

71

4

AHU Kit ­ Installation Instructions ­ 11/2021

Contents

5.4 Wiring layout

74

5.5 Wiring system diagrams

87

5.6 Connection of external signal lines

95

6 Test Run

100

7 Control
7.1 Remote controller
7.2 Thermostat 7.2.1 Control and display elements 7.2.2 Operation 7.2.3 Initial Settings 7.2.4 Error Codes 7.2.5 Maintenance and Service

101
101
101 101 102 107 111 111

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General information and safety notes
1 General information and safety notes

1.1 General information
This document contains the installation instructions for the Panasonic AHU Kits.

1

Intended use The intended use of AHU Kits is to connect Panasonic ECOi, ECO G, PACi and PACi NX outdoor

units to third-party air handling unit systems, using the same refrigerant circuit as the outdoor unit.

While ECOi and ECO G systems typically use R410A as refrigerant, some PACi systems are operated with R410A while others are operated with R32 refrigerant.

Application examples for Panasonic AHU Kits are hotels, offices, server rooms or all large buildings where air quality control such as humidity control and fresh air is needed.

Where information in this document does not apply to all four system ranges, but only to either ECOi, ECO G PACi or PACi NX systems, this will be indicated by the relevant product range logos:

NX
The intended use of the heat pumps requires adherence to the information and instructions contained in this Manual, especially the safety notes and warning messages. Any other use is considered improper and can lead to significant damage. Panasonic assumes no liability for any damage resulting from improper use.

Products covered
The AHU Kits are supplied in three different product versions, “light”, “medium” or “advanced”, and can be selected based on the required functionality. The following products are covered in this documentation:

Product version Light
Medium Advanced

PAW-160MAH2L PAW-280MAH2L PAW-560MAH2L PAW-160MAH2M PAW-280MAH2M PAW-560MAH2M PAW-160MAH2 PAW-280MAH2 PAW-560MAH2

PAW-280PAH2L PAW-280PAH2M PAW-280PAH2

NX
­ PAW-280PAH3M PAW-280PAH3M-1
­

Target groups
The installation should be performed only by qualified electricians in strict accordance with the installation instructions and especially with the safety instructions given in this document.
The appliance is not to be used by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. Children being supervised are not to play with the appliance.

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AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes
i Important: Validity of this document Due to the ongoing development and innovation of Panasonic products, this document and all the information contained herein may not reflect the current status of the relevant products. Preliminary or missing information will be updated and added on an ongoing basis and published at the discretion of Panasonic.
Information for using this manual
Various notices, symbols and text representations used in this Manual are briefly explained below.
1
Safety-related information Safety-related information, including product safety labels, safety notes and warning messages, warns the user about dangers and provides instructions for the safe and proper use of the product. In this manual, the following layout and symbols are used for warning messages:
WARNING
This signal word warns of a potentially hazardous situation which can lead to death or severe injury. Follow the instructions given in the warning messages in order to prevent this.
CAUTION
This signal word warns of a potentially hazardous situation which can result in slight or moderate injury. Follow the instructions given in the warning messages in order to prevent this.
! ATTENTION
This signal word warns of a situation which can result in material damage occurring. Follow the instructions given in the warning messages in order to prevent this.
Additional warning symbols
Warning of electric shock
Further information
i Important
This indicates other important information or references to other useful sources of technical data and descriptions.

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General information and safety notes

1.2

Safety notes
To avoid possible harm to persons or damage to products, read and follow these safety notes.

WARNING
The following precautions need to be followed strictly, in order to avoid hazardous situations, which could result in death or serious injury.

1

Electric shock or fire may result from inadequate or incorrect installation or wiring

procedures.

System installation must only be performed by an experienced electrician.

Arrange installation at the dealer where the system was purchased or use a professional installer.

System installation must be performed in strict accordance to the installation procedures described in this document.

Damage to the circuit breakers may result from incorrect electrical wiring, insufficient electrical circuit capacity or use with other electrical devices.
Always use a dedicated circuit for electrical wiring. Strictly avoid using other electrical devices within the same electrical circuit. Make sure the electrical circuit used has sufficient capacity.

Overheating or fire may result if connections or attachments are not secure.
Use the specified cables (type and wiring diameter) for the electrical connections, and securely connect the cables.
Run and fasten the cables securely so that external forces or pressure placed on the cables will not be transmitted to the connection terminals.

Suffocation can result if refrigerant gas leaks and exceeds the limit density in a small room. Installation of the refrigerant piping must only be performed by an experienced, qualified
installer to minimize the risk of leaks.
Install so that even if refrigerant gas leaks into the installation space, it will not exceed the practical limit density of 0.44 kg/m3 for R410A and 0.061 kg/m3 for R32, in accordance with the local regulations for facility air conditioning equipment. However, for further limits and calculations to be done, see 1.3 Instructions for the safe handling of R32, p. 9
If the refrigerant gas concentration does exceed the density limit, do one of the following:
install an opening in a neighbouring room
or install ventilation equipment triggered by gas leak detection sensors
or install an automatic shut off and/or pump-down system provided by the manufacturer of the equipment

Poisonous gas can result if refrigerant gas comes into contact with fire. After installation of refrigerant pipes, perform a dry nitrogen gas sealing test to check that
there are no leaks.
Ventilate the work area if refrigerant gas leaks during installation.
Prevent the refrigerant gas from coming into contact with a fan heater, stove, range, or other source of ignition.

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General information and safety notes
Incorrect installation can result in falling equipment causing damage, injuries or other accidents. Install in a location that is fully strong enough to support the weight of the equipment. Perform installation that is secure enough to withstand earthquakes, tornadoes, storms
and other strong winds.
Frostbite injuries may result from coming into direct contact with the refrigerant gas. When handling refrigerant gas, be careful not to touch the refrigerant gas directly.
1
CAUTION
The following precautions need to be followed strictly, in order to avoid hazardous situations, which could result in minor or moderate injury.
Electric shock, shock and fires may result from incomplete grounding of the equipment or failure to install an earth leakage circuit breaker (ELCB) or residual current device (RCD). Be sure to ground equipment properly. Do not attach ground wires to gas pipes, water pipes, lightning arresters, or telephone
ground lines. Always install an earth leakage circuit breaker or residual current device.
Ignition of flammable gas or inflammable materials may result from installing the system in locations where flammable gas can generate, enter, build up, or leak. Do not install the system in locations where flammable gas can occur in any way. Do not install in locations where volatile inflammable materials are handled.
1.3 Instructions for the safe handling of R32
As R32 is a flammable refrigerant, additional precautions, installation and handling instructions need to be observed.

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9

General information and safety notes

WARNING
The following precautions need to be followed strictly, in order to avoid hazardous situations, which could result in death or serious injury.

A fire or explosion hazard and the generation of poisonous gas may result if R32 refrigerant gas comes into contact with open flames.

The air conditioning appliance with direct expansion (DX) coil shall be installed, operated

1

and stored in a space without continuously operating ignition sources (e.g. open flames, an operating gas appliance or an operating electric heater).

If DX coil appliance is not installed in a separate refrigeration machinery room as specified in EN378, calculate the maximum allowed density limit of the relevant installation space as detailed below (see 1.3.1 Calculating the density limit, p. 10).

The DX coil appliance shall be installed, operated and stored in a well ventilated space with a ceiling height of at least 2.5 m and a floor area larger than [Amin] m² so that it complies with the required density limit (see 1.3.1 Calculating the density limit, p. 10).

Pay particular attention to prevent refrigerant leakages during installation, maintenance and repair work (see 1.3.2 Preventing leakages, p. 18).

If a leak is suspected, do the following:

remove or extinguish all naked flames immediately

ventilate the room immediately

use a calibrated electronic leak dectector to detect any leaks (see 1.3.3 Detecting leaks, p. 19)

Repair any leaks diligently (see 1.3.4 Repairing leaks, p. 19), before refilling the refrigerant system with refrigerant and checking for any leaks again.

! ATTENTION
For full details on the required precautions for the installation and maintenance of an R32 unit, always refer to the Installation Guide of the relevant PACi or PACi NX unit.
1.3.1 Calculating the density limit
As R32 is a slightly flammable refrigerant (ASHRAE flammability class A2L), the requirements for the installation space of the DX coil appliance must comply with the applicable regulations and standards, such as IEC60335-2-40 and EN378.
Depending on perspective, the density limit determines either the minimum floor area “Amin” (specified in square metres (m²)) required for a given refrigerant charge amount (specified in kilogrammes (kg)), or vice versa the allowed maximum refrigerant charge “mmax” for the DX coil appliance (specified in kilogrammes (kg)) in relation to the floor area of the available installation space (specified in square metres (m²)). The charge limits for R32 installations (based on IEC60335-2-40, 6th edition) also depend on the mounting position of the DX coil.

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AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes

While there are no floor area limitations for refrigerant charges of less than 1.23 kg, the minimum floor area [Amin] for larger refrigerant charge amounts can be calculated by the following formula:

Allowed R32 refrigerant charge (kg)

[ ] Amin =

mc

2

2.5 x LFL5/4 x h0

ceiling-mounted
8.0

Amin= minimum floor area (m2)

7.0

mc= refrigerant charge (kg)

h0= height factor (mounting position):

6.0

­ 0.6 for floor-mounted

5.0

wall-mounted

1

­ 1.8 for wall-mounted

­ 1.0 for window-mounted

4.0

­ 2.2 for ceiling mounted

3.0

LFL= R32 Lower Flammability Limit

(0.307 kg/m3)

2.0

floor-mounted

1.0

0.0 0.0

50.0

100.0

150.0

200.0

250.0

Floor area (m2)

Note The refrigerant charge amount ([mc]) must be calculated by the following formula: [mc] = [1] + [2] = [1] + ([3] * ([4] ­ [5]))

where: [1]: refrigerant charged at shipment [2]: refrigerant charge amount in the field 1 [3]: additional charge per 1 m

[4]: total pipe length [5]: max. charge-less pipe length

1. If the total pipe length is within the maximum value of the charge-less pipe length, refrigerant charge in the field is unnecessary.

Calculating examples
Using the above formula, it is possible to calculate a) the minimum floor area for a given refrigerant charge, or b) the maximum refrigerant charge allowed for a given floor area.

Example:
S-6071PF3E + U-71PZH3E5 6.8 kW, 7 m piping length 1.95 kg refrigerant charge

2.5 m

2.2 m

a) A given refrigerant charge amount of 1.95 kg requires a minimum floor area of 2.41 m2.
b) For a given floor area of 10 m2 the maximum refrigerant charge amount is 3.97 kg.

10,0 m2

Refrigerant charge: 1.95 kg

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11

General information and safety notes

Density limit diagrams
The following diagrams roughly demonstrate the relation between the amount of refrigerant charged for the relevant R32 PACi or PACi NX outdoor units ([mc]) and the required minimum installation space floor area.

AHU units

For the AHU units, the density limit diagram shows three different “Density Limit Lines”, where each

line applies to a different AHU unit installation height and installation orientation (horizontal/vertical)

1

as follows:

Installation height of indoor unit (h0) Indoor unit type

Density limit line

h0 2.2 m 1.8 m h0 < 2.2 m h0 < 1.8 m

AHU unit (horizontal installation) AHU unit (horizontal installation) AHU unit (vertical installation)

Line 1 Line 2 Line 3

In the ceiling Indoor unit

In a false ceiling with change in ceiling

height

Indoor unit

In the ceiling

In the room

[Amin]: minimum indoor floor area (m2)

h0 2.2 m

1.8 m h0 < 2.2 m

Indoor unit 0.25 m h0 < 1.8 m

550 Line 3
500

450

400

350

300

250

200

150

100

50

Line 2

Line 1

0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5

[mc]: refrigerant charge (kg) of the outdoor unit

1.22

7.90

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AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes

[mc]

Line 1

[Amin] Line 2

Line 3

1.22 2.5

3.0 12.8

1.3 2.6

3.2 14.5

1.4 2.8

3.4 16.8

1.5 3.0

3.7 19.3

1.6 3.2

3.9 22.0

1.7 3.4

4.2 24.8

1.8 3.6

4.4 27.8

1.9 3.8

4.6 31.0

2.0 4.0

4.9 34.3

2.1 4.2

5.1 37.8

2.2 4.4

5.4 41.5

2.3 4.6 5.6 45.4

2.4 4.8 5.8 49.4

2.5 5.0 6.1 53.6

2.6 5.2 6.5 58.0

2.7 5.4 7.0 62.6

2.8 5.6

7.5 67.3

2.9 5.8

8.1 72.2

3.0 6.0

8.6 77.2

3.1 6.2

9.2 82.5

3.2 6.6

9.8 87.9

3.3 7.0 10.4 93.4

3.4 7.4 11.1 99.2

[mc]

Line 1

[Amin] Line 2

Line 3

3.5 7.9 11.7 105.1

3.6 8.3 12.4 111.2

3.7 8.8 13.1 117.5

3.8 9.3 13.8 123.9

3.9 9.8 14.6 130.5

4.0 10.3 15.3 137.3

4.1 10.8 16.1 144.2

4.2 11.3 16.9 151.4

4.3 11.9 17.7 158.7

4.4 12.4 18.5 166.1

4.5 13.0 19.4 173.8

4.6 13.6 20.2 181.6

4.7 14.1 21.1 189.5

4.8 14.8 22.0 197.7

4.9 15.4 22.9 206.0

5.0 16.0 23.9 214.5

5.1 16.7 24.8 223.2

5.2 17.3 25.8 232.0

5.3 18.0 26.8 241.0

5.4 18.7 27.9 250.2

5.5 19.4 28.9 259.6

5.6 20.1 29.9 269.1

5.7 20.8 31.0 278.8

[mc]

Line 1

[Amin] Line 2

Line 3

5.8 21.5 32.1 288.6

5.9 22.3 33.2 298.7

6.0 23.0 34.4 308.9

6.1 23.8 35.5 319.3

6.2 24.6 36.7 329.8

6.3 25.4 37.9 340.6

1

6.4 26.2 39.1 351.5

6.5 27.0 40.3 362.5

6.6 27.9 41.6 373.8

6.7 28.7 42.8 385.2

6.8 29.6 44.1 396.8

6.9 30.4 45.4 408.5

7.0 31.3 46.8 420.4

7.1 32.2 48.1 432.5

7.2 33.1 49.5 444.8

7.3 34.1 50.9 457.3

7.4 35.0 52.3 469.9

7.5 35.9 53.7 482.7

7.6 36.9 55.1 495.6

7.7 37.9 56.6 508.7

7.8 38.9 58.1 522.0

7.9 39.9 59.6 535.5

PACi outdoor units

[mc] [mmax] [mc] 1.22 1.22 < [mc] [mmax] [mc] > [mmax]

Refrigerant charge amount (i.e. total of refrigerant at shipment and refrigerant charge amount in the field), specified in kilogrammes (kg) Maximum refrigerant charge amount, specified in kilogrammes (kg) Can be installed Installation possible within the hatched range Cannot be installed

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General information and safety notes
U-60PZ2E5, U-71PZ2E5, U-36PZH2E5, U-50PZH2E5, U-60PZH2E5
10.0

[Amin]: minimum indoor floor area (m2)

8.0

• U-36PZH2E5, U-50PZH2E5

Can not be installed
6.0

Can be installed

1

4.0

2.0

Cannot be installed

0.0

0.0

0.5

1.0

1.5

2.0

2.5

[mc]: refrigerant charge (kg) of the outdoor unit

1.22 1.35

1.80

[mmax] (kg)

Standard
U-60PZ2E5 U-71PZ2E5 1.80

Elite
U-36PZH2E5 U-50PZH2E5 1.35

U-60PZH2E5 1.80

U-71PZH2E5, U-71PZH2E8, U-100PZH2E5, U-100PZH2E8, U-125PZH2E5, U-125PZH2E8, U-140PZH2E5, U-140PZH2E8

[Amin]: minimum indoor floor area (m2)

26.0 24.0 22.0 20.0 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0
0.0 0.5

Can be installed

• U-71PZH2E5, U-71PZH2E8 Can not be installed

Cannot be installed

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5

[mc]: refrigerant charge (kg) of the outdoor unit

1.220

2.850

5.975

[mmax] (kg)

Elite
U-71PZH2E5 U-71PZH2E8 2.850

U-100PZH2E5 U-100PZH2E8
5.975

U-125PZH2E5 U-125PZH2E8

U-140PZH2E5 U-140PZH2E8

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AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes

U-100PZ2E5, U-100PZ2E8, U-125PZ2E5, U-125PZ2E8, U-140PZ2E5, U-140PZ2E8

[Amin]: minimum indoor floor area (m2)

20.0

18.0

16.0

14.0

Can be installed

• U-100PZ2E5, U-100PZ2E8 Cannot be installed

12.0

10.0

1

8.0

6.0

4.0
Cannot be installed
2.0

0.0

0.0 0.5

1.0

1.5 2.0

2.5

3.0

3.5

4.0

4.5 5.0

[mc]: refrigerant charge (kg) of the outdoor unit

1.22

3.50 3.88

[mmax] (kg)

Standard
U-100PZ2E5 U-100PZ2E8 3.50

U-125PZ2E5 U-125PZ2E8
3.88

U-140PZ2E5 U-140PZ2E8

U-200PZH2E8, U-250PZH2E8

[Amin]: minimum indoor floor area (m2)

45.0

40.0

35.0

30.0

25.0

Can be installed

20.0

15.0

10.0

Cannot be installed

5.0

0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5

[mc]: refrigerant charge (kg) of the outdoor unit

1.22

7.80

[mmax] (kg)

Elite U-200PZH2E8 7.80

U-250PZH2E8

NX PACi NX outdoor units
For PACi NX outdoor units, the density limit diagrams show three different “Density Limit Lines”, where each line applies to a different indoor unit installation height as follows:

AHU Kit ­ Installation Instructions ­ 11/2021

15

General information and safety notes

Installation height of indoor unit (h0) h0 2.2 m 1.8 m h0 < 2.2 m h0 < 1.8 m

Indoor unit type AHU unit AHU unit AHU unit

Density limit line Line 1 Line 2 Line 3

U-36PZ3E5, U-50PZ3E5, U-60PZ3E5A, U-71PZ3E5A

1

[mc]

Refrigerant charge amount (i.e. total of refrigerant at shipment and refrigerant charge amount in

the field), specified in kilogrammes (kg)

[mmax]

Maximum refrigerant charge amount, specified in kilogrammes (kg)

[mc] 1.22 1.22 < [mc] [mmax]

Can be installed
Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combination (see diagrams and tables below)

[mc] > [mmax]

Cannot be installed

25

5

[Amin]: minimum indoor floor area (m2) [Amin]: minimum indoor floor area (m2)

20

Line 3

4 Line 2

15

3

Line 1

10

2

1 5

0

0

1.0 1.2 1.4 1.6 1.8 2.0

1.0

1.2

1.4

1.6

1.8

2.0

1.22

1.49

1.22

1.49

[mc]: refrigerant charge (kg) of the outdoor unit [mc]: refrigerant charge (kg) of the outdoor unit [mmax] (kg)

Standard U-36PZ3E5 0.95

U-50PZ3E5 1.33

U-60PZ3E5A 1.30

U-71PZ3E5A 1.49

Calculating example Conditions
Calculation

Outdoor unit: U-71PZ3E5A Total pipe length: 40 m Max. charge-less pipe length: 30 m

Refrigerant charged at shipment: 1.32 kg Refrigerant charge in the field: 0,017 kg/m

[mc] = [1] + [2] = [1] + ([3] ([4] ­ [5])) [mc] = 1.32 kg + (0.017 kg (40 m ­ 30 m)) [mc] = 1.49 kg

U-100PZ3E5, U-100PZ3E8, U-125PZ3E5, U-125PZ3E8, U-140PZ3E5, U-140PZ3E8

[mc] [mmax] 2.40 [mc] [mmax] [mc] > [mmax]

Refrigerant charge amount, specified in kilogrammes (kg) Maximum refrigerant charge amount, specified in kilogrammes (kg) Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combination (see diagrams and tables below) Cannot be installed

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AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes

[Amin]: minimum indoor floor area (m2) [Amin]: minimum indoor floor area (m2)

140.0

15.0

14.0

120.0

Line 3

13.0

Line 2

12.0

100.0

11.0

10.0

80.0

9.0

Line 1

8.0

60.0

7.0

6.0

40.0

5.0

20.0

4.0 3.0

0.0

2.0

2

2.5

3

3.5

4

1.0

1

0.0

2.40

3.70

2

2.5

3

3.5

4

[mc]: refrigerant charge (kg) of the outdoor unit

2.40

3.70

[mc]: refrigerant charge (kg) of the outdoor unit [mmax] (kg)

Standard
U-100PZ3E5 U-100PZ3E8 3.30

U-125PZ3E5 U-125PZ3E8
3.70

U-140PZ3E5 U-140PZ3E8

U-36PZH3E5, U-50PZH3E5, U-60PZH3E5

[mc] [mmax] [mc] 1.22 1.22 < [mc] [mmax] [mc] > [mmax]

Refrigerant charge amount, specified in kilogrammes (kg) Maximum refrigerant charge amount, specified in kilogrammes (kg) Can be installed Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combination (see diagrams and tables below) Cannot be installed

[Amin]: minimum indoor floor area (m2)

16.0 Line 3
14.0

12.0

10.0

8.0

6.0

4.0

Line 2

2.0

Line 1

0.0 1.2

1.22

1.3

[mc]: refrigerant charge (kg) of the outdoor unit [mmax] (kg)

Elite
U-36PZH3E5 U-50PZH3E5 1.28

U-60PZH3E5 1.30

AHU Kit ­ Installation Instructions ­ 11/2021

17

General information and safety notes

U-71PZH3E5, U-71PZH3E8, U-100PZH3E5, U-100PZH3E8, U-125PZH3E5, U-125PZH3E8, U-140PZH3E5, U-140PZH3E8

Installation height of indoor unit (h0) Indoor unit type

h0 2.2 m 1.8 m h0 < 2.2 m h0 < 1.8 m

AHU unit (horizontal installation) AHU unit (horizontal installation) AHU unit (vertical installation)

Density limit line
Line 1 Line 2 Line 3

1

[mc]

Refrigerant charge amount, specified in kilogrammes (kg)

[mmax]

Maximum refrigerant charge amount, specified in kilogrammes (kg)

1.950 < [mc] [mmax] Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combination (see diagrams and tables below)

[mc] > [mmax]

Can not be installed

[Amin]: minimum indoor floor area (m2) [Amin]: minimum indoor floor area (m2)

350

300

Line 3

250

200

150

100

50

0.0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

6.0 6.5

1.950

5.975

[mc]: refrigerant charge (kg) of the outdoor unit

35

Line 2

30

25
Line 1
20

15

10

5

0

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

6.0 6.5

1.950

5.975

[mc]: refrigerant charge (kg) of the outdoor unit [mmax] (kg)

Elite
U-71PZH3E5 U-71PZH3E8 2.850

U-100PZH3E5 U-100PZH3E8
5.975

U-125PZH3E5 U-125PZH3E8

U-140PZH3E5 U-140PZH3E8

1.3.2 Preventing leakages
Do not let air enter the refrigeration cycle, because this will increase the risk of explosion and injury due to high pressure inside the refrigerant cycle.
Keep all tubing runs as short as possible.
Use the flare method for connecting tubing and apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.
Do not leak refrigerant while working on the refrigerant tubes during installation, maintenance or repair.
Check carefully for leaks (see 1.3.3 Detecting leaks, p. 19) before starting the test run.

18

AHU Kit ­ Installation Instructions ­ 11/2021

General information and safety notes

1.3.3 Detecting leaks

If a leak is suspected, remove or extinguish all naked flames and ventilate the space immediately.

To search for and detect any refrigerant leaks, never use potential sources of ignition like e.g. a halide torch or any other detector using a naked flame.

Leak detection fluids are suitable for use with most refrigerants, but the use of detergents containing chlorine shall be avoided, as the chlorine may react with the refrigerant and corrode the copper pipework.

Preferably, use an electronic leak dectector, which is suitable for R32, to check for

1

leaks.

Make sure that the electronic detector has an adequate sensitivity and that it has been calibrated in a refirgerant-free area.

Set the leak detector to a percentage of the lower flammable limit (LFL) of the relevant refrigerant, and calibrate the detector to the refrigerant used (R32) so that the appropriate percentage of refrigerant gas (max. 25 %) is confirmed.

1.3.4 Repairing leaks
If a leakage of refrigerant is found, which requires brazing, do the following:
Recover all refrigerant from the system, or isolate all refrigerant by means of shut-off valves in a part of the system remote from the leak.
Purge the system with oxygen-free nitrogen (OFN) both, before and during the brazing process.
Re-fill the system with refrigerant and check for any remaining leaks (see 1.3.3 Detecting leaks, p. 19).
Repeat this procedure until no more leaks are detected.

1.4

Warranty policy
We can be held responsible for the quality and performance of the AHU Kit we supply.
However, we cannot be held responsible for the performances, operations and machine controls of your complete AHU system which incorporates our AHU Kit, nor for the components used in the refrigerant cycle of your AHU system (including, but not limited to, compressors, high-pressure switches, check valves, strainers, expansion valves, solenoid valves, 4-way valves, capillary tubes, accumulator tanks, and heat exchanger tubes), nor for any damages and defects caused in the process of installing our AHU Kit, by the system design and/or during assembly of your AHU system.
We do not publish the certificate to show conformity to the EMC and the product safety requirements applicable to your complete AHU system.

AHU Kit ­ Installation Instructions ­ 11/2021

19

Ventilation theory and air handling units
2 Ventilation theory and air handling units

2.1

Purpose of air-conditioning
The purpose of air-conditioning is to provide comfortable indoor air conditions for the room occupants and to provide energy saving potentials for the owner.

Comfort

If room occupants feel “comfortable” in a given room, depends mainly on the following two factors:

2

air temperature relative air humidity

However, optimum working or living conditions do not only exist at a specific setpoint of room temperature and room humidity, but also within a certain band width of the setpoint.
A temperature setpoint of 22 °C and a relative humidity setpoint of 45 % with variations of ±2 °C and ±15 %rh respectively are typical levels used for office spaces. Also, at high temperatures, maximum limitation of absolute humidity should be provided to avoid “muggy” conditions. Typically, this limit value lies at about 10 g/kg (H2O).

Cooling and humdifying

Absolute humidity Cooling only

Humdifying and reheating, if required

Temperature

Humdifying only
Heating and humdifying

24 °C Comfort range

35 %rh 20 °C
Heating only

65 %rh

rh = relative humidity
Energy savings
Besides the advantages in terms of indoor air quality, air conditioning offers also an energy saving potential. For example, while uncontrolled ventilation through open windows leads to large amounts of heat being lost to the outside during the heating season or gained from the outside during the cooling season, air conditioning systems provide possibilities to utilize the extra “free” energy in heat recovery modules so that overall operating costs will be reduced. The larger the area of the comfort range, the better the energy saving opportunities.

20

AHU Kit ­ Installation Instructions ­ 11/2021

Ventilation theory and air handling units

2.2 Mechanical ventilation systems

Main components of mechanical ventilation systems
The main components of a mechanical ventilation system are the following:
Air handling unit (AHU) Air ducts Air distribution elements

Exhaust air

Outside air

Return air

Supply air

2

2.3

Air handling units

Main components of air handling units
The main components of an air handling unit are shown in the following graphic.

Air handling unit (AHU)

Outside air (OA)

Mixed air (MA)

Supply air fan Cooling Coil (SAF) (CC)

Dampers (D)

Filter

Heating Coil

(F)

(HC)

Supply air (SA)

Recirculated air (CA)

Exhaust air (EA)

Dampers (D)

Return air (RA)

Dampers (D)

Main types of air handling units
Supply type

AHU Kit ­ Installation Instructions ­ 11/2021

21

Ventilation theory and air handling units
Exhaust type
Supply/Exhaust type with cross-flow heat exchanger
2
Supply/Exhaust type with mixing chamber
Supply exhaust type with rotary heat exchanger

Connecting AHU systems via the AHU Kit to ECOi/ECO G or PACi outdoor units
The following graphic shows an example for connecting a third-party air handling unit via the Panasonic AHU Kit to Panasonic ECOi/ECO G or PACi outdoor units.

22

AHU Kit ­ Installation Instructions ­ 11/2021

Ventilation theory and air handling units

Air handling unit control by external 0­10 V signal

Air Handling Unit Kit

AL1 PV

ºC

OUT

SV

ºC

ATU

SET

External control system

0­10 V control signal

PACi or ECOi/ECO G outdoor unit
2
Air Handling Unit
1 This schematic layout applies only to the advanced and medium AHU Kit versions (MAH2/PAH2/PAH3) only, because they feature an in-built CZ-CAPBC2 interface handling the 0­10 V control. This enables various control alternatives: Capacity control through external BMS via 0­10 V signal (only supported by ECOi and PACi, but not by ECO G outdoor units) Capacity control through in-built supply air or ambient temperature sensor (only available with advanced version and only supported by ECOi and PACi, but not by ECO G outdoor units) Temperature setpoint control
2 As the “light” version of the AHU Kit does not include an in-built CZ-CAPBC2 interface for handling the 0­10 V control, this schematic layout does not apply to the “light” AHU Kit version.

AHU Kit ­ Installation Instructions ­ 11/2021

23

Product description
3 Product description

3.1 General description

The Panasonic AHU Kits offer a wealth of connectivity possibilities so that they can be easily integrated into many systems.

The AHU Kits are part of an on-going development process aiming at constant improvement of the product to better meet customer demand. The new generation model, PAW-280PAH3M(-1), has been developed to connect the new PACi NX outdoor units to third party AHU systems. However, it is also compatible with PACi outdoor units.

Three versions available for MAH2/PAH2 generation, depending on the required functionality (light, medium or advanced version), medium version available for PAH3 generation

IP65 enclosure (MAH2/PAH2 and PAH3 generation) providing the possibility for

3

outdoor installation

0­10 V demand control* (included on the CZ-CAPBC2 interface)

Easy control by BMS

• Only available with all ECOi, PACi Elite and PACi NX units, but not with ECO G units.

Features and benefits
Depending on the AHU Kit version, the devices offer the following features and benefits:

Features and benefits

Product generation

Product version

Connectable with P-LINK system.

Connectable with MD protocol system

Fan control signal from the PCB can be used for controlling the air volume of an external fan (High/Mid/Low and LL for Th-OFF) (Need to change the fan control circuit wiring at field.)

Defrost operation signal, Thermo-ON/OFF states output

Drain pump control (Drain-pump and the float switch to be field-supplied)

Basic humidifier control output (Humidifier to be field-supplied)

Alarm and operation output

The system is controlled by the air intake (or room return air) temperature in the same way as a standard indoor unit. Selectable modes: Automatic / Cooling / Heating / Fan / Dry (equivalent to Cooling).

Easy integration into BMS or AHU control systems using demand control: 40 to 115 % (5 % steps) of nominal current by 0­10 V input signal

Temperature set point adjustment by external control system using 0­10 V or 0­140 Ohm signal

Room supply air temperature can be controlled by the additional thermostat, its supply air temperature sensor and the 0­10 V input signal for enhanced comfort and efficiency

Target temperature setting based on ambient temperature with CZ-CAPBC2 interface using 0­10 V signal

Outdoor unit quiet mode operation

Light X ­ X X X X X X
­ ­
­
­ ­

MAH2/PAH2 Medium X ­

Advanced X ­

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

­

X

­

X

­

­

PAH3 Medium
X X X X ­1 ­ X X
X X
­
­ X 2

1 Only float switch signal available, but no drain pump control signal. 2 Only possible in combination with U-71PZH3E5/8, U-100/125/140PZ(H)3E5/8 and after setting the proper parameters.

24

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

3.2

Scope of supply
The scope of supply of the AHU Kits depends on the product generation (MAH2/PAH2 or PAH3), product version (light, medium or advanced) and on the relevant VRF system range. The following table shows an overview of the different scopes of supply.

Scope of supply

Product generation Product version

Light

MAH2/PAH2 Medium

Advanced

PAH3 Medium

NX

PAW-160MAH2L

PAW-160MAH2M

PAW-160MAH2

PAW-280MAH2L PAW-280PAH2L PAW-280MAH2M PAW-280PAH2M PAW-280MAH2

PAW-560MAH2L

PAW-560MAH2M

PAW-560MAH2

PAW-280PAH3M PAW-280PAH2
PAW-280PAH3M-1

IP65 case

X

X

X

X

X

X

X

Control unit including transformer

X

X

X

X

X

X

X

Relays

X

X

X

X

X

X

X

Terminal boards

X

X

X

X

X

X

X

Remote controller (CZ-RTC5B) Remote controller (CZ-RTC6BL)

X ­

X ­

X ­

X ­

X ­

X ­

­ X

3

Compatibility with Panasonic H&C Control App

­

­

­

­

­

­

X

Compatibility with Panasonic H&C Diagnosis App

­

­

­

­

­

­

X

PCB for T10 connection (PAW-T10)

X

X

­

­

X

X

­

Expansion valve

X

­

X

­

X

­

­

PCBs for the expansion and RAP / SVK valves

X

­

X

­

X

­

­

E1 + E3

X

­

X

­

X

­

­

Refrigerant temperature sensors

E1 + E2

­

X

­

X

­

X

X

Air intake and air outlet temperature TA

sensors

BL

X

X

X

X

X

X

X

X

­

X

­

X

­

­

CZ-CAPBC2 interface for 0-10 V control (ACC-SP1A)

­

­

X

X

X

X

X

Thermostat (TR-16 / TR-16e*) including an

additional temperature sensor to be used either

­

­

­

­

X

X

­

for room supply air or ambient air temperature

• Depending on AHU Kit generation.

The heat exchanger, fan and fan motor must be field-supplied.

Exterior view of AHU Kits and some of their compoments

Light version: PAW-280PAH2L*

1

1 Remote controller (CZ-RTC5B)

2 External signal control PCB (PAW-T10)

3 Terminal board with 6 connectors

• Shown as an example and with transparent front cover removed. Layout also applicable for ECOi and ECO G, see table above, 3.2 Scope of supply, p. 25, for details.
  2
  PACi accessories

3

Thermistor x2

Thermistor

(Refrigerant: E1, E2) (Air: TA)

AHU Kit ­ Installation Instructions ­ 11/2021

25

Product description
3
3
5
6 5 4
26

Medium version: PAW-280PAH2M*

1

1 Remote controller (CZ-RTC5B)

2 Terminal board with 6 connectors

3 CZ-CAPBC2 interface (on rear side)

• Shown as an example and with transparent front cover removed. Layout also applicable for ECOi and ECO G, see table above, 3.2 Scope of supply, p. 25, for details.

PACi accessories

2

Thermistor x2

Thermistor

(Refrigerant: E1, E2) (Air: TA)

Advanced version: PAW-560MAH2*

1

1 Remote controller (CZ-RTC5B)

2

2 Thermostat (TR-16/TR-16e**)

3 External signal control PCB (PAW-T10)

4 Terminal board with 6 connectors

5 CZ-CAPBC2 interface (on rear side)

• AHU Kit shown with transparent front cover removed. Layout also

3

applicable for PACi, see table above, 3.2 Scope of supply,

p. 25, for details.

** Depending on AHU Kit generation.

4

ECOi / ECO G accessories

Thermistor x2

Thermistor x2 Expansion

(Refrigerant: E1, E3) (Air: TA, BL) valve

Medium version: PAW-280PAH3M(-1)1

1 Remote controller (CZ-RTC6BL)

2 Main PCB

1

3 Terminal board

4 Fan relay

5 Fan PCB2

6 CZ-CAPBC2 interface

1 Shown with front cover opened. 2 Fan PCB is omitted from PAW-280PAH3M-1
2 PACi and PACi NX accessories

NX

3

Thermistor x2

Thermistor

(Refrigerant: E1, E2) (Air: TA)

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

Control functions provided as standard by integral components
CZ-RTC5B / CZ-RTC6BL remote controller Operation-ON/OFF Mode selection Temperature setting Parameter settings
TR-16 / TR-16e Additional Thermostat (advanced version only) Target temperature setting based on ambient temperature with proportional integral logic Demand control based on room supply air temperature to enhance comfort and efficiency

• Only one of these two options can be chosen at a time.

CZ-CAPBC2 Mini seri-para I/O unit (medium and advanced versions only)

3

Easy integration in external AHU control systems and BMS

Demand control: 40 to 115 % (5 % steps) of nominal current by 0­10 V input signal1

Medium version: Terminals M2-3, M2-4. Advanced version: Terminals M2-1, M2-2 in case of using TR-16e; Terminals M2-3, M2-4 without using TR-16e.

Target temperature setting by 0­10 V or 0­140 input signal1

Medium and advanced versions: Terminals M2-3, M2-4.

Suction air temperature (TA sensor) output by 4­20 mA signal

Medium version (MAH2/PAH2 generation): Terminals PT9, PT10; medium version (PAH3 generation): Terminals M2.1, M2.2. Advanced version only, directly on CZ-CAPBC2 interface: Terminals 1, 2.

Mode select and/or ON/OFF control2

Medium and advanced versions: Terminals DI1, DI2, DI3, COM.

Fan operation control2

Medium and advanced versions: Terminals DI1, DI2, DI3, COM.

Operation status output/ Alarm output

Medium and advanced versions: Terminals COM, DO1 / COM, DO2.

Thermostat ON/OFF control2

Medium and advanced versions: Terminals DI1, DI2, DI3, COM.

1 Demand control by external BMS cannot be combined with the demand control or target temperature setting accomplished by the thermostat. However, if simultaneous demand control and target temperature setting is needed, this can only be achieved by using a second (optional) CZ-CAPBC2 interface.
2 Mode select and/or ON/OFF control cannot be combined with fan operation control nor Thermostat ON/OFF control. However if simultaneous control of 2 options is needed, this can be achieved by using a second (optional) CZ-CAPBC2 interface. All 3 options cannot be used at the same time.

AHU Kit ­ Installation Instructions ­ 11/2021

27

Product description

PAW-T10 PCB to connect to T10 connector (light and advanced versions only) Dry contact PCB for easy control of the unit Operation ON/OFF input signal > PAW-T10 terminal I(1); I(2). Remote control prohibition > PAW-T10 terminal I(3); I(4). Operation ON status output signal, maximum 230 V / 5 A (NO/NC) > PAW-T10 terminal NC O(5); NO O(6); Potential for both O(7). Alarm status output signal, maximum 230 V / 5 A (NO/NC) PAW-T10 terminal NC O(8); NO O(9); Potential for both O(10).

PAW-OCT, DC12 V outlet, OPTION terminal

Output signal for Cooling/Heating/Fan status

MAH2/PAH2 generation: Terminal ON4; ON5; ON6; Potential ON1;

PAH3 generation: Terminal OP4; OP5; OP6; Potential OP1.

3

Output signal for Defrost operation indication

MAH2/PAH2 generation: Terminal ON2; Potential ON1;

PAH3 generation: Terminal OP2; Potential OP1.

Output signal for Thermostat-ON status

MAH2/PAH2 generation: Terminal ON3; Potential ON1; PAH3 generation: Terminal OP3; Potential OP1

Additional contacts available
External humidifier control (ON/OFF) 230 V AC 3 A (not available for PAH3 versions) > Terminal HU1; HU2.
External fan control (ON/OFF) 12 V DC > Terminal FD1; FD2.
External filter status signal potential free (not available for PAH3 versions)

Terminal FI1; FI2.
External float switch signal potential free > Terminal FS1; FS2.
External leakage detection sensor or TH. OFF contact potential free (possible usage for external blow out temperature control) Terminal EX1; EX2

OPT terminal contacts (only available for PAH3 versions) Mode change: Cool/Heat > Terminal: OT1 Potential; OT2 Heating; OT3 Cooling.
The following two control functions are alternatively configurable by parameter settings on the remote controller:
Demand level 1, 2, 3 > Terminal OT1 Potential; OT4 Demand level 1, OT5 Demand level 2, OT6 Demand level 3.
or
Quiet mode on outdoor unit (only available for U-71PZH3E5/8; U-100/125/140PZ(H)3E5/8), Thermostat Off (free cooling) Terminal OT1 Potential; OT5 Quiet mode; OT6 Thermostat Off

28

AHU Kit ­ Installation Instructions ­ 11/2021

Mounting boards
9 8
17 16

Product description

1

MAH2/PAH2 Upper mounting board ­

front side

2

1 Remote controller (CZ-RTC5B)

2 Thermostat (TR-16 / TR-16e) 1

3 External signal control PCB (PAW-T10) 1

4 Terminal board with 6 connectors (labelled

Section A to Section F) each with 20 con-

3

tacts 2

4

MAH2/PAH2 Upper mounting board ­

rear side 5 Pocket for thermostat

3

5

6 CZ-CAPBC2 interface for 0-10 V control

6

(PCB name: ACC-SP1A)1

7 Main control board

(PCB name: CR-UXRP71B-P)

8 Terminal for upper mounting board

9 EMC filter 1

7

MAH2/PAH2 Lower mounting board

10

10 Auxiliary transformer 1

11

11 Relay 1

12 Transformer

13 Relay

12

14 Single motorized valve PCB 1

15 Relay

13

16 Single RAP valve control PCB 3 17 Double RAP valve control PCB 3

14

15

1 Not available in all versions. 2 For details see 5.3 Terminal board layout, p. 66. 3 Depending on the model used, the single RAP valve control PCB (16) or double RAP valve control PCB (17) is mounted
in this position.

AHU Kit ­ Installation Instructions ­ 11/2021

29

Product description
6 5 4
3
5 4

PAH3M Mounting board

1 Remote controller (CZ-RTC6BL)

1

2 Main control board

(PCB name: ACXA73-38670)

3 Terminal board 1

4 Fan relay

5 Fan control board

(PCB name: ACXA73-38680)

2

6 CZ-CAPBC2 interface for 0-10 V control

(PCB name: ACC-SP1A)

3

PAH3M-1 Mounting board

1 CZ-CAPBC2 interface for 0-10 V control

1

(PCB name: ACC-SP1A)

2 Main control board

(PCB name: ACXA73-38670)

3 Terminal board 1

4 Fan relay

5 Remote controller (CZ-RTC6BL)
2

3

1 For details see 5.3 Terminal board layout, p. 66.

30

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

3.3

System lineup

System lineup ­ ECOi systems

Capacity HP kW
5 16 10 28
20 56 30 84 40 112 50 140 60 168 70 196 80 224

Outdoor unit combination U-…

AHU Kit combination PAW-…

all Mini ECOi/ECOi outdoor units

160MAH2(L/M)1

all Mini ECOi/ECOi 2-pipe and 3-pipe outdoor units with 280MAH2(L/M)2 nominal cooling capacity of at least 8 HP

20ME2E8

­

­

­

560MAH2(L/M)3

16ME2E8 14ME2E8

­

­

560MAH2(L/M)4

20ME2E8 20ME2E8

­

­

560MAH2(L/M)4

18ME2E8 16ME2E8 16ME2E8

­

560MAH2(L/M)4

20ME2E8 20ME2E8 20ME2E8

­

560MAH2(L/M)4

20ME2E8 20ME2E8 20ME2E8 10ME2E8 560MAH2(L/M)4

20ME2E8 20ME2E8 20ME2E8 20ME2E8 560MAH2(L/M)4

­ ­
­ 280MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M)

­ ­
­ ­ ­ 280MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M) 560MAH2(L/M)

­ ­
­ ­ ­ ­ ­ 280MAH2(L/M) 560MAH2(L/M)

1 PAW-160MAH2(L/M): PAW-160MAH2(L/M) can be installed in combination with all ECOi outdoor units (including Mini ECOi

3

(2-pipe), ECOi 2-pipe and ECOi 3-pipe units) like any other standard indoor unit.

Mixed installation with standard indoor units is possible with all ECOi outdoor units (as above). However, in this case one additional RAP valve (CZ- P160RVK2) must be installed in the unit connection pipe, unless the complete system is exclusively used in cooling only operation.

2 PAW-280MAH2(L/M): PAW-280MAH2(L/M) can be installed in combination with all ECOi outdoor units (including Mini ECOi (2-pipe), ECOi 2-pipe and ECOi 3-pipe units) with a nominal cooling capacity of at least 8 HP like any other standard indoor unit.

Mixed installation with standard indoor units is possible with all ECOi outdoor units (as above). However, in this case two additional RAP valves (2 x CZ-P160RVK2) must be installed in the unit connection pipe, unless the complete system is exclusively used in cooling only operation.

When PAW-280MAH2(L/M) is installed in combination with an ECOi 3-pipe outdoor unit, either two 16 kW solenoid valve kits or two ports of a 16 kW multi-port heat recovery box respectively (CZ-P…HR3) need to be used in parallel installation for each AHU DX coil.

3 PAW-560MAH2(L/M): Mixed installation with standard indoor units is not allowed.

Connection to ECOi 3-pipe systems is not allowed.

4 In case of a multiple AHU Kit combination within one refrigerant system, those kits must share the same AHU housing including fan, and they have to be “group-wired” and operate as a single group. In this case you have to disconnect the included remote controllers and CZ-CAPBC2 boards (ACC-SP1A PCB) except for one each. It is irrelevant which one is retained, there is no preference. The external connections need to be done only on the unit with the connected CZ-CAPBC2 board. Note: In this particular case it is even possible to combine a single advanced or medium version with one, two or three light versions, and still have full functions of the advanced or medium version respectively.

AHU Kit ­ Installation Instructions ­ 11/2021

31

Product description

System lineup ­ ECO G systems

Capacity

HP kW

5

16

10

28

20

56

Outdoor unit
all ECO G outdoor units all ECO G 2-way outdoor units all ECO G 2-way outdoor units

AHU Kit
PAW-160MAH2(L/M)1 PAW-280MAH2(L/M)2 PAW-560MAH2(L/M)3

1 PAW-160MAH2(L/M): Like any other standard indoor unit, PAW-160MAH2(L/M) can be installed in combination with all ECO G outdoor units.

Mixed installation with standard indoor units is possible. However, in this case one additional RAP valve (CZ-P160RVK2) must be installed in the unit connection pipe, unless the complete system is exclusively used in cooling only operation or in a 3-way system with heat recovery box.

2 PAW-280MAH2(L/M): Like any other indoor unit of similar capacity, PAW- 280MAH2(L/M) can be installed in combination with all ECO G 2-way outdoor units only.

Mixed installation with standard indoor units is possible. However, in this case two additional RAP

valves (2 x CZ-P160RVK2) must be installed in the unit connection pipe, unless the complete system is

3

exclusively used in cooling only operation. For further restrictions in mixed installations, please refer to the system descriptions in the corresponding ECOG technical data books.

Connection to ECO G 3-way systems is not allowed.

3 PAW-560MAH2(L/M): Like any other indoor unit of similar capacity, PAW- 560MAH2(L/M) can be installed in combination with all ECO G 2-way outdoor units only.

Mixed Installation with standard indoor units is not possible.

Connection to ECO G 3-way systems is not allowed.

System lineup ­ PACi systems

Capacity (kW)
R410A 3.6
R32 R410A 5.0 R32 R410A 6.0 R32 R410A 7.1 R32 R410A 10.0 R32 R410A 12.5 R32 R410A 14.0 R32 R410A 20.0 R32 R410A 25.0 R32

Refrigerant

PACi Standard

Outdoor unit 1

PACi Elite

Single-phase units

Three-phase units

Single-phase units

Three-phase units

­

­

U-36PE2E5A

­

­

­

U-36PZH2E5

­

­

­

U-50PE2E5A

­

­

­

U-50PZH2E5

­

U-60PEY2E5

­

U-60PE2E5A

­

U-60PZ2E5

­

U-60PZH2E5

­

U-71PEY2E5

­

U-71PE1E5A

U-71PE1E8A

U-71PZ2E5

­

U-71PZH2E5

U-71PZH2E8

U-100PEY1E5 U-100PZ2E5 U-125PEY1E5

U-100PEY1E8 U-100PZ2E8 U-125PEY1E8

U-100PE1E5A U-100PZH2E5 U-125PE1E5A

U-100PE1E8A U-100PZH2E8 U-125PE1E8A

U-125PZ2E5

U-125PZ2E8

U-125PZH2E5

U-125PZH2E8

­

U-140PEY1E8

U-140PE1E5A

U-140PE1E8A

U-140PZ2E5 ­ ­ ­

U-140PZ2E8 ­ ­ ­

U-140PZH2E5 ­ ­ ­

U-140PZH2E8 U-200PE2E8A U-200PZH2E8 U-250PE2E8A

­

­

­

U-250PZH2E8

AHU Kit
PAW-280PAH2(L/M) 2 or
PAW-280PAH3M(-1)2

1 With PACi systems, only 1-to-1 installations are allowed (e.g. 1 x PACi outdoor unit + 1 x PAW-280PAH2(L/M)). Combinations with more than 1 outdoor unit or more than 1 AHU Kit are not possible.
2 Mixed installation with standard indoor units is not allowed.

32

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

NX System lineup ­ PACi NX systems

Capacity (kW)

3.6

R32

5.0

R32

6.0

R32

7.1

R32

10.0

R32

12.5

R32

14.0

R32

Refrigerant

Outdoor unit 1

PACi NX Standard

PACi NX Elite

Single-phase units

Three-phase units

Single-phase units

Three-phase units

U-36PZ3E5

­

U-36PZH3E5

­

U-50PZ3E5

­

U-50PZH3E5

­

U-60PZ3E5A

­

U-60PZH3E5

­

U-71PZ3E5A

­

U-71PZH3E5

U-71PZH3E8

U-100PZ3E5

U-100PZ3E8

U-100PZH3E5

U-100PZH3E8

U-125PZ3E5

U-125PZ3E8

U-125PZH3E5

U-125PZH3E8

U-140PZ3E5

U-140PZ3E8

U-140PZH3E5

U-140PZH3E8

AHU Kit
PAW-280PAH3M(-1) 2

1 With PACi NX systems, only 1-to-1 installations are allowed (e.g. 1 x PACi NX outdoor unit + 1 x PAW-280PAH3M). Combinations with more than 1 outdoor unit or more than 1 AHU Kit are not possible.
2 Mixed installation with standard indoor units is not allowed.
3

3.4 System Overview
System Overview ­ ECOi systems
Single-connection system
B

A

I

C

D K

H

F

G

J

M

L

E

A AHU Kit enclosure (complete) B AHU system (field supplied) C Remote controller (integrated in AHU Kit enclosure) D Outdoor unit E Liquid piping (field supplied) F Gas piping (field supplied) G Electronic expansion valve

H Thermistor for liquid pipe I Thermistor for gas pipe J Thermistor for suction air K Thermistor for discharge air L Inter-unit wiring M Magnetic relay for operating the blower (field sup-
plied)

AHU Kit ­ Installation Instructions ­ 11/2021

33

Product description

System example for ECOi single-connection system

AL1 PV

ºC

OUT

SV

ºC

ATU

SET

PAW-280MAH2

ECOi outdoor unit

Outdoor unit / indoor unit wiring Wiring for temperature sensors and
expansion valve

Piping

Air Handling Unit

3

Multi-connection system

Note: The following restrictions apply only if PAW-560MAH2(M/L) is used alone or in combination with other AHU Kits. For all other AHU Kits and AHU Kit combinations without PAW-560MAH2(M/L) no such restrictions apply. 1 All AHU heat exchangers belonging to the same refrigerant circuit have to be installed in the same chassis equipped with
one single fan motor. 2 One AHU Kit and correspondingly one magnetic relay is required for each heat exchanger. All AHU Kits have to be wired
to the fan motor. 3 All AHU Kits shall be connected and controlled by group control wiring of one remote controller. 4 In case of a multiple AHU Kit combination within one refrigerant system, those kits must share the same AHU housing
including fan, and they have to be “group-wired” and operate as a single group. In this case you have to disconnect the included remote controllers and CZ-CAPBC2 boards (ACC-SP1A PCB) except one. It is irrelevant which one is retained, there is no preference. The external connections need to be done only on the unit with the connected CZ-CAPBC2 board. Note: In this particular case it is even possible to combine a single advanced or medium version with one, two or three light versions, and still have full functions of the advanced or medium version respectively.

34

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

System example for ECOi multi-connection system (140 kW capacity)

ECOi outdoor units

RC group wiring

MOV GaLsiqteumidpt.esmepn.ssoernsor PAW-280MAH2

Fan operation signal

28 kW heat exchanger
56 kW heat exchanger

Fan motor control
PCB

16 HP

16 HP
Gas tube Liquid tube

18 HP

PAW-560MAH2 Air inlet temperature sensor

56 kW heat exchanger

PAW-560MAH2

Air outlet temperature sensor

Outdoor unit / indoor unit communication

System Overview ­ ECO G systems

3

Single-connection1 or multiple-connection2 systems

B

A

I

C

D K

H

F

J G

M

L

E

A AHU Kit enclosure (complete) B AHU system (field supplied) C Remote controller (integrated in AHU Kit enclosure) D Outdoor unit E Liquid piping (field supplied) F Gas piping (field supplied) G Electronic expansion valve

H Thermistor for liquid pipe (E1) I Thermistor for gas pipe (E3) J Thermistor for suction air (TA) K Thermistor for discharge air (BL) L Inter-unit wiring M Magnetic relay for operating the blower (field sup-
plied)

1 Single-connection system shown here as an example. 2 Multi-connection systems are possible in combination with PAW-160MAH2(L/M) or PAW-280MAH2(L/M). In case of
multi-connections with PAW-560MAH2(L/M) further restrictions will apply. For details, please contact your local Panasonic service partner.

AHU Kit ­ Installation Instructions ­ 11/2021

35

Product description
System Overview ­ PACi and PACi NX systems
NX
Single-connection1 system only

Strainer (liquid pipe & gas pipe) min. Ø 25.4 mm (field supplied)
3

A AHU Kit enclosure (complete) B AHU system (field supplied) C Remote controller (integrated in AHU Kit enclosure) D Outdoor unit E Liquid piping (field supplied) F Gas piping (field supplied)

G Thermistor for liquid pipe (E1) H Thermistor for heat exchanger pipe middle (E2) I Thermistor for suction air (TA) J Inter-unit wiring K Magnetic relay for operating the blower (field sup-
plied)

1 With all PACi and PACi NX outdoor units only 1-to-1 installations are allowed.

System example for PACi and PACi NX single-connection system

AL1 PV

ºC

OUT

SV

ºC

ATU

PAW-280PAH2

SET

Outdoor unit / Wiring for indoor unit wiring temperature sensors
PACi outdoor unit

AL1 PV

ºC

OUT

SV

ºC

ATU

PAW-280PAH3

SET

Outdoor unit / Wiring for indoor unit wiring temperature sensors
PACi NX outdoor unit

Piping

Air Handling Unit

Piping

Air Handling Unit

36

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

3.5 Technical data

Technical data ­ AHU Kit

MAH2/PAH2 generation

PAH3 generation

Power source

V / ph / Hz

220 … 240 / 1 / 50

220 … 240 / 1 / 50

Rated current consumption

A

0.1

0.1

Rated power consumption (max.)

W

18.0

18.0

Dimensions (enclosure)

H x W x D

mm

278 x 278 x 180

400 x 500 x 150

Net weight

Advanced / Medium

kg

4.25

11.5 (Medium only)

Light

kg

3.98

­

Protection class

IP65

IP65

Thermostat (Fitted on advanced versions only: PAW-160/280/560MAH2 and PAW- 250PAH2)

Dimensions

W x H x D

mm

48 x 48 x 90 (approximately)

­

Required void space

mm

85 mm (approximately)

­

Mounting cut-out

W x H

mm

44 x 44 (DIN 1/16)

­

Display height Temperature range

mm

10 (approximately)

­

measuring / indicating

°C

­50 … +580 / ­50 … +580

­

3

Temperature increments

measuring / indicating

°C

0.1 / 1

­

Sampling period

sec

< 3

­

Output signal

factory setting / alternative setting V

0 … 10 / 2 … 10

­

Input signal

Pt100, 2-/3-wire

­

Control voltage Ambient temperature (max.) Ambient air humidity (max. in hostile environments) Quiescent current consumption

V / ph / Hz

85 … 265 / 1 / 50/60

­

°C

45

­

% RH

85

­

W

< 3

­

Dimensions ­ AHU Kit
MAH2/PAH2 generation
278 254 210

180 130 100

278 254 210 257 225
25 Ø7

257 225
Front view (transparent cover removed)

Ø4.2 x 10 115 165
Ø5.2 x 11
Side view

AHU Kit ­ Installation Instructions ­ 11/2021

37

Product description
PAH3 generation
Right side view

Front view

Left side view

20

Rear view

125

460

500

250

125

129

Top view

3

150

400

20

360

i Important
Apart from the technical data and limitations given in the following tables, the technical data and limitations of the relevant outdoor units, local wiring and piping design regulations and approved best practices need to be observed in installation procedures.
Technical data and limitations ­ ECOi and ECO G systems ­ R410A

AHU Kit HP AHU Kit model

Nominal cooling capacity

Nominal heating capacity

Air volume flow (Cooling)

Min

Max

AHU DX coil heat exchanger volume Min

Max

Bypass factor

Piping length

Min / Max

Max. branch pipe length

Max. branch pipe length difference after first branch

Elevation difference (in/out)

Max

Piping connections

Liquid pipe

Gas pipe

Intake temperature of AHU Kit

Cooling (Min / Max)

Ambient temperature (outdoor unit)

Heating (Min / Max) Cooling (Min / Max) Heating (Min / Max)

kW kW m³/h m³/h dm3 dm3
m m m m Inch (mm) Inch (mm) °C DB °C WB °C DB °C DB °C WB

5 PAW-160MAH2(L/M)
14.0 16.0 1,140 2,600 1.7 2.8 0.9 (recommended) 10 / 100 12 10 10 3/8 (9.52) 5/8 (15.88) 18 / 32 13 / 23 16 / 30 -10 / 43 -20 / 15

10 PAW-280MAH2(L/M)
28.0 31.5 3,500 5,000 2.8 5.4 0.9 (recommended) 10 / 100 12 10 10 3/8 (9.52) 7/8 (22.22) 18 / 32 13 / 23 16 / 30 -10 / 43 -20 / 15

20 PAW-560MAH2(L/M)
56.0 63.0 7,000 10,000 5.6 10.7 0.9 (recommended) 10 / 100 12 10 10 5/8 (15.88) 1 1/8 (28.58) 18 / 32 13 / 23 16 / 30 -10 / 43 -20 / 15

30¹

40¹

PAW-280MAH2(L/M) + PAW-560MAH2(L/M) +

PAW-560MAH2(L/M) PAW-560MAH2(L/M)

84.0

112.0

95.0

127.0

10,500

14,000

15,000

20,000

8.4

11.2

16.1

21.4

0.9 (recommended) 0.9 (recommended)

10 / 100

10 / 100

12

12

10

10

10

10

3/4 (19.05)

3/4 (19.05)

1 1/4 (31.75)

1 1/2 (38.15)

18 / 32

18 / 32

13 / 23

13 / 23

16 / 30

16 / 30

-10 / 43

-10 / 43

-20 / 15

-20 / 15

Continued on following page.

38

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

Technical data and limitations ­ ECOi and ECO G systems ­ R410A (cont.)

AHU Kit HP

50¹

60¹

70¹

80¹

AHU Kit model

PAW-560MAH2(L/M) + PAW-560MAH2(L/M) + PAW-560MAH2(L/M) + PAW-560MAH2(L/M) +

PAW-560MAH2(L/M) + PAW-560MAH2(L/M) + PAW-560MAH2(L/M) + PAW-560MAH2(L/M) +

PAW-280MAH2(L/M) PAW-560MAH2(L/M) PAW-560MAH2(L/M) + PAW-560MAH2(L/M) +

PAW-280MAH2(L/M) PAW-560MAH2(L/M)

Nominal cooling capacity

kW

140.0

168.0

196.0

224.0

Nominal heating capacity

kW

155.0

189.0

219.0

252.0

Air volume flow (Cooling)

Min

m³/h

17,500

21,000

24,000

28,000

Max

m³/h

25,000

30,000

35,000

40,000

AHU DX coil heat exchanger volume Min

dm3

14.0

16.8

19.6

22.4

Max

dm3

26.8

32.1

37.5

42.8

Bypass factor

0.9 (recommended) 0.9 (recommended) 0.9 (recommended) 0.9 (recommended)

Piping length

Min / Max

m

10 / 100

10 / 100

10 / 100

10 / 100

Max. branch pipe length

m

12

12

12

12

Max.branch pipe length difference after first branch

m

10

10

10

10

Elevation difference (in/out)

Max

m

10

10

10

10

Piping connections

Liquid pipe

Inch (mm)

3/4 (19.05)

3/4 (19.05)

7/8 (22.22)

7/8 (22.22)

Gas pipe

Inch (mm)

1 1/2 (38.15)

1 1/2 (38.15)

1 5/8 (41.28)

1 3/4 (44.45)

Intake temperature of AHU Kit

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 32

18 / 32

°C WB

13 / 23

13 / 23

13 / 23

13 / 23

Ambient temperature (outdoor unit)

Heating (Min / Max) °C DB Cooling (Min / Max) °C DB Heating (Min / Max) °C WB

16 / 30 -10 / 43 -20 / 15

16 / 30 -10 / 43 -20 / 15

16 / 30 -10 / 43 -20 / 15

16 / 30 -10 / 43

3

-20 / 15

1 Not applicable for ECO G systems.

Technical data and limitations ­ PACi systems ­ R410A

AHU Kit

Outdoor unit ­ PACi Standard

Nominal cooling capacity

Nominal heating capacity

Piping connections

Liquid pipe

Gas pipe

Piping length

Min / Max

Precharged length (R410A)

Max

Additional refrigerant charge (R410A) due to extended

piping length

Ambient temperature

Cooling (Min / Max)

Heating (Min / Max)

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max)

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max)

AHU DX coil heat exchanger volume Min / Max

Heat exchanger face area

Min / Max

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max)

subject to restrictions2

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max) AHU unit under “special conditions B3” AHU DX coil heat exchanger volume, Min / Max subject to restrictions3 Additional refrigerant charge (R410A) due to larger heat exchanger volume Max. additional refrigerant charge (R410A) Max. pipe length Max. ambient temp. for pump down

kW kW Inch (mm) Inch (mm) m m g/m
°C DB °C WB
m³/h °C DB °C WB °C DB dm3 m2
m³/h
°C DB °C WB °C DB
dm3
kg/dm3
kg m °C

U-60PEY2E5 6.0 6.0
3/8 (9,52) 5/8 (15,88)
3 / 40 30 40
-10 / 43 -20 / 15
540 / 960 18 / 32 13 / 23 16 / 30 1.3 / 1.4 ­ / ­
540 / 1,450
18 / 30 13 / 23 16 / 30
1.3 / 1.8
0.9
0.36 40 n/a

U-71PEY2E5 7.1 7.1
3/8 (9,52) 5/8 (15,88)
3 / 35 30 40

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

U-100PEY1E5 U-125PEY1E5 U-100PEY1E8

10.0

12.5

10.0

10.0

12.5

10.0

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

5/8 (15,88) 5/8 (15,88) 5/8 (15,88)

5 / 30

5 / 30

5 / 30

30

30

30

50

50

50

U-125PEY1E8 12.5 12.5
3/8 (9,52) 5/8 (15,88)
5 / 30 30 50

U-140PEY1E8 14.0 14.0
3/8 (9,52) 5/8 (15,88)
5 / 30 30 50

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-10 / 43 -20 / 15

540 / 960 18 / 32 13 / 23 16 / 30 1.3 / 1.4 ­ / ­

840 / 1,980 18 / 32 13 / 23 16 / 30 1.5 / 1.9
0.43 / 0.51

1,140 / 2,100 18 / 32 13 / 23 16 / 30 1.5 / 1.9
0.43 / 0.51

840 / 1,980 18 / 32 13 / 23 16 / 30 1.5 / 1.9
0.43 / 0.51

1,140 / 2,100 18 / 32 13 / 23 16 / 30 1.5 / 1.9
0.43 / 0.51

1,140 / 2,160 18 / 32 13 / 23 16 / 30 1.5 / 1.9
0.43 / 0.51

540 / 1,600 840 / 2,400 1,140 / 2,500 840 / 2,400 1,140 / 2,500 1,140 / 2,600

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

1.3 / 2.0

1.5 / 2.8

1.5 / 2.75

1.5 / 2.8

1.5 / 2.75

1.5 / 2.8

0.9

0.9

0.9

0.9

0.9

0.9

0.54

0.81

0.76

0.81

0.76

0.81

35

30

30

30

30

30

n/a

35

25

35

25

n/a

Continued on following page. See footnotes overleaf.

AHU Kit ­ Installation Instructions ­ 11/2021

39

Product description

Technical data and limitations ­ PACi systems ­ R410A (cont.)

AHU Kit

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

Outdoor unit ­ PACi Elite

U-36PE2E5A U-50PE2E5A U-60PE2E5A U-71PE1E5A U-100PE1E5A U-125PE1E5A U-140PE1E5A

Nominal cooling capacity

kW

3.6

5.0

6.0

7.1

10.0

12.5

14.0

Nominal heating capacity

kW

4.0

5.6

7.0

8.0

11.2

14.0

16.0

Piping connections

Liquid pipe

Inch (mm) 1/4 (6,35)

1/4 (6,35)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

Gas pipe

Inch (mm) 1/2 (12,7)

1/2 (12,7)

5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88)

Piping length

Min / Max

m

3 / 40

3 / 40

3 / 40

5 / 50

5 / 50

5 / 50

5 / 50

Precharged length (R410A)

Max

m

30

30

30

30

30

30

30

Additional refrigerant charge (R410A) due to larger heat g/m

20

20

40

50

50

50

50

exchanger volume

Ambient temperature

Cooling (Min / Max) °C DB

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

Heating (Min / Max) °C WB

-20 / 15

-20 / 15

-20 / 15

-20 / 15

-20 / 15

-20 / 15

-20 / 15

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max) m³/h

480 / 780

480 / 780

540 / 960

720 / 1,500 840 / 1,980 1,140 / 2,100 1,140 / 2,160

Air intake temperature1

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

°C WB

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU DX coil heat exchanger volume Min / Max

dm3

­ / 1.3

­ / 1.3

­ / 1.4

­ / 1.8

1.7 / 2.1

1.7 / 2.1

1.7 / 2.1

Heat exchanger face area

Min / Max

m2

­ / ­

­ / ­

­ / ­

­ / ­

0.43 / 0.51

0.43 / 0.51

0.43 / 0.51

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max) m³/h

480 / 1,080 480 / 1,080 540 / 1,600 720 / 1,800 840 / 2,400 1,140 / 2,600 1,140 / 2,700

3

subject to restrictions2 Air intake temperature1

Cooling (Min / Max) °C DB

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

°C WB

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

13 / 23

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU unit under “special conditions B3”

AHU DX coil heat exchanger volume, Min / Max

dm3

­ / 1,5

­ / 1.5

­ / 1.8

­ / 2.2

1.7 / 3.0

1.7 / 3.0

1.7 / 3.0

subject to restrictions3

Additional refrigerant charge (R410A) due to larger heat kg/dm3

0.9

0.9

0.9

0.9

0.9

0.9

0.9

exchanger volume

Max. additional refrigerant charge (R410A)

kg

0.18

0.18

0.36

0.36

0.81

0.81

0.81

Max. pipe length

m

30

30

40

40

30

30

30

Max. ambient temp. for pump down

°C

n/a

n/a

35

35

25

25

25

AHU Kit

Outdoor unit ­ PACi Elite

Nominal cooling capacity

Nominal heating capacity

Piping connections

Liquid pipe

Gas pipe

Piping length

Min / Max

Precharged length (R410A)

Max

Additional refrigerant charge (R410A) due to extended

piping length

Ambient temperature

Cooling (Min / Max)

Heating (Min / Max)

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max)

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max)

AHU DX coil heat exchanger volume Min / Max

Heat exchanger face area

Min / Max

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max)

subject to restrictions2

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max) AHU unit under “special conditions B3” AHU DX coil heat exchanger volume, Min / Max subject to restrictions3 Additional refrigerant charge (R410A) due to larger heat exchanger volume Max. additional refrigerant charge (R410A) Max. pipe length Max. ambient temp. for pump down

kW kW Inch (mm) Inch (mm) m m g/m
°C DB °C WB
m³/h °C DB °C WB °C DB dm3 m2
m³/h
°C DB °C WB °C DB
dm3
kg/dm3
kg m °C

U-71PE1E8A 7.1 8.0
3/8 (9,52) 5/8 (15,88)
5 / 50 30 50
-10 / 43 -20 / 15
720 / 1,500 18 / 32 13 / 23 16 / 30 ­ / 1.8 ­ / ­
720 / 1,800
18 / 30 13 / 23 16 / 30
­ / 2.2
0.9
0.36 40 35

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

U-100PE1E8A U-125PE1E8A U-140PE1E8A U-200PE2E8A

10.0

12.5

14.0

19.5

11.2

14.0

16.0

22.4

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

5/8 (15,88)

5/8 (15,88)

5/8 (15,88)

1 (25,4)

5 / 50

5 / 50

5 / 50

5 / 70

30

30

30

30

50

50

50

50

U-250PE2E8A 25.0 28.0
1/2 (12,7) 1 (25,4) 5 / 70
30 80

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-10 / 43 -20 / 15

-15 / 43 -20 / 15

-15 / 43 -20 / 15

840 / 1,980 18 / 32 13 / 23 16 / 30 1.7 / 2.1
0.43 / 0.51

1,140 / 2,100 18 / 32 13 / 23 16 / 30 1.7 / 2.1
0.43 / 0.51

1,140 / 2,160 18 / 32 13 / 23 16 / 30 1.7 / 2.1
0.43 / 0.51

1,680 / 3,960 18 / 32 13 / 23 16 / 30 2.3 / 4.3 0.54 / 1.0

2,280 / 4,440 18 / 32 13 / 23 16 / 30 2.7 / 4.3 0.66 / 1.0

840 / 2,400 1,140 / 2,600 1,140 / 2,700 1,680 / 4,300 2,280 / 5,400

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

18 / 30 13 / 23 16 / 30

1.7 / 3.0

1.7 / 3.0

1.7 / 3.0

2.3 / 5.7

2.7 / 7.1

0.9

0.9

0.9

0.9

0.9

0.81

0.81

0.81

1.25

2.51

30

30

30

n/a

n/a

25

25

25

n/a

n/a

Continued on following page. See footnotes overleaf.

40

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

Air volume flow m³/h Outdoor unit 480 500 540 700 720 800 840 900 960 1000 1080 1140 1200 1450 1500 1600 1680 1800 1980 2100 2160 2280 2400 2500 2600 2700 3500 3960 4000 4300 4440 4500 5000 5400 U-60PEY2E5 U-71PEY2E5 U100-PEY1E5/8 U125-PEY1E5/8 U140-PEY1E8 U-50PE2E5 U-60PE2E5 U-71PE1E5/8 U-100PE1E5/8 U-125PE1E5/8 U-140PE1E5/8 U-200PE2E8 U-250PE2E8

Maximum allowed air volume flow under “Standard conditions”

Higher maximum allowed air volume flow under “Special conditions A2”: Maximum allowed air intake temperature at AHU DX coil heat exchanger in cooling mode is restriced to 30 °C DB.

1 Air intake temperature entering the AHU DX coil heat exchanger

2 Special conditions A: Using an AHU unit with a higher maximum allowed air volume flow is subject to a restriction of the

“Air intake temperature” to 30 °C DB (instead of 32 °C WB under standard conditions).

3 Special conditions B: Using an AHU DX coil heat exchanger with a larger volume is subject to the following restrictions:

an additional refrigerant charge (R410A), which is required irrespective of an additional refrigerant charge which might be needed due to an extended piping length (see calculation example below)

3

AND a reduced maximum pipe length

AND an ambient air temperature limit above which it may not be possible to pump down the complete refrigerant charge (including all additional refrigerant) into the outdoor unit.

Note: The AHU DX coil must be designed according to Panasonic specification.

Calculation example for total additional refrigerant charge (R410A)
Unit: U-60PE2E5A Pipe length: 40 metres AHU DX coil (supplied by AHU manufacturer): 1,7 dm3 Refrigerant charge at shipment fitted for pipe length within 30 m Pipes additional refrigerant charge: 0,04 kg/m AHU DX coil additional refrigerant charge: 0,9 kg/dm3 Refrigerant charge at shipment is sufficient for AHU DX coil volume up to 1,4 dm3
Total additional refrigerant charge calculation ((1.7 dm3 ­ 1.4 dm3) x 0.9 kg/dm3) + (10 m x 0.04 kg/m) = 0.27 kg + 0.40 kg = 0.67 kg
Calculation example for number of passes in the heat exchanger
The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated by the formula:
Minimum number of passes = Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10­4 The calculated value must then be rounded up to the next integer number.
Example Number of steps: 12 Distance between tube sheets: 1,000 mm Number of row: 3
Minimum number of passes = 12 × 1,000 x 3 × 1.5 × 10­4 = 5.4 This value must be rounded up to 6.
This means that the minimum number of passes is 6 passes.

AHU Kit ­ Installation Instructions ­ 11/2021

41

Product description

Technical data and limitations ­ PACi systems ­ R32

AHU Kit

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

Outdoor unit ­ PACi Standard

U-60PZ2E5 U-71PZ2E5 U-100PZ2E5 U-125PZ2E5 U-140PZ2E5 U-100PZ2E8 U-125PZ2E8 U-140PZ2E8

Nominal cooling capacity

kW

6.0

7.1

10.0

12.5

14.0

10.0

12.5

14.0

Nominal heating capacity

kW

6.0

7.1

10.0

12.5

14.0

10.0

12.5

14.0

Piping connections

Liquid pipe

Inch (mm) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52)

Gas pipe

Inch (mm) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88)

Piping length

Min / Max

m

3 / 40

3 / 40

5 / 50

5 / 50

5 / 50

5 / 50

5 / 50

5 / 50

Precharged length (R32)

Max

m

30

30

30

30

30

30

30

30

Additional refrigerant charge (R32) due to extended piping g/m

35

35

45

45

45

45

45

45

length

Ambient temperature

Cooling (Min / Max) °C DB

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

-10 / 43

Heating (Min / Max) °C WB

-15 / 24

-15 / 24

-15 / 24

-15 / 24

-15 / 24

-15 / 24

-15 / 24

-15 / 24

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max) m³/h

780 / 1,320 780 / 1,320 900 / 2,160 1,140 / 2,280 1,200 / 2,400 900 / 2,160 1,140 / 2,280 1,200 / 2,400

Air intake temperature1

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

°C WB

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU DX coil heat exchanger volume Min / Max

dm3

1.3 / 1.4

1.3 / 1.4

1.5 / 1.9

1.5 / 1.9

1.5 / 1.9

1.5 / 1.9

1.5 / 1.9

1.5 / 1.9

Heat exchanger face area

Min / Max

m2

­ / ­

­ / ­

0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0.43 / 0.51

AHU unit under “special conditions A2”

3

Air volume flow, subject to restrictions2
Air intake temperature1

Cooling (Min / Max) m³/h Cooling (Min / Max) °C DB

780 / 1,450 780 / 1,600 900 / 2,300 1,140 / 2,500 1,200 / 2,600 900 / 2,300 1,140 / 2,500 1,200 / 2,600

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

°C WB

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU unit under “special conditions B3”

AHU DX coil heat exchanger volume, Min / Max

dm3

1.3 / 1.8

1.3 / 2.0

1.5 / 2.6

1.5 / 2.6

1.5 / 2.8

1.5 / 2.6

1.5 / 2.6

1.5 / 2.8

subject to restrictions3

Additional refrigerant charge (R32) due to larger heat

kg/dm3

0.83

0.83

0.83

0.83

0.83

0.83

0.83

0.83

exchanger volume

Max. additional refrigerant charge (R32)

kg

0.33

0.50

0.58

0.58

0.74

0.58

0.58

0.74

Max. pipe length

m

30

25

35

35

35

35

35

35

Max. ambient temp. for pump down

°C

n/a

n/a

35

25

35

35

25

35

See footnotes overleaf.

AHU Kit

Outdoor unit ­ PACi Elite

Nominal cooling capacity

Nominal heating capacity

Piping connections

Liquid pipe

Gas pipe

Piping length

Min / Max

Precharged length (R32)

Max

Additional refrigerant charge (R32) due to larger heat

exchanger volume

Ambient temperature

Cooling (Min / Max)

Heating (Min / Max)

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max)

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max)

AHU DX coil heat exchanger volume Min / Max

Heat exchanger face area

Min / Max

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max)

subject to restrictions2

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max) AHU unit under “special conditions B3” AHU DX coil heat exchanger volume, Min / Max subject to restrictions3 Additional refrigerant charge (R32) due to larger heat exchanger volume Max. additional refrigerant charge (R32) Max. pipe length Max. ambient temp. for pump down

kW kW Inch (mm) Inch (mm) m m g/m
°C DB °C WB
m³/h °C DB °C WB °C DB dm3 m2
m³/h
°C DB °C WB °C DB
dm3
kg/dm3
kg m °C

U-36PZH2E5 3.6 4.0
1/4 (6,35) 1/2 (12,7)
3 / 40 30 20
-15 / 46 -20 / 18
360 / 870 18 / 32 14 / 25 16 / 30 ­ / 1.3 ­ / ­
360 / 870
18 / 32 14 / 25 16 / 30
­ / 1.5
0.83
0.17 30 n/a

U-50PZH2E5 5.0 5.6
1/4 (6,35) 1/2 (12,7)
3 / 40 30 20
-15 / 46 -20 / 18
510 / 990 18 / 32 14 / 25 16 / 30 ­ / 1.3 ­ / ­
510 / 1,080
18 / 30 14 / 25 16 / 30
­ / 1.5
0.83
0.17 30 n/a

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

U-60PZH2E5 U-71PZH2E5 U-100PZH2E5 U-125PZH2E5 U-140PZH2E5

6.0

7.1

10.0

12.5

14.0

7.0

8.0

11.2

14.0

16.0

3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52)

5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88)

3 / 40

5 / 50

5 / 85

5 / 85

5 / 85

30

30

30

30

30

35

45

45

45

45

-15 / 46 -20 / 18

-15 / 46 -20 / 18

-15 / 46 -20 / 18

-15 / 46 -20 / 18

-15 / 46 -20 / 18

780 / 1,320 18 / 32 14 / 25 16 / 30 ­ / 1.4 ­ / ­

780 / 1,320 18 / 32 14 / 25 16 / 30 ­ / 1.8 ­ / ­

900 / 2,160 18 / 32 14 / 25 16 / 30 1.7 / 2.1
0.43 / 0.51

1,140 / 2,280 18 / 32 14 / 25 16 / 30 1.7 / 2.1
0.43 / 0.51

1,200 / 2,400 18 / 32 14 / 25 16 / 30 1.7 / 2.1
0.43 / 0.51

780 / 1,600 780 / 1,700 900 / 2,400 1,140 / 2,600 1,200 / 2,700

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

­ / 1.9

­ / 2.2

1.7 / 3.0

1.7 / 3.0

1.7 / 3.0

0.83

0.83

0.83

0.83

0.83

0.41

0.33

0,74

0,74

0,74

30

40

65

65

65

n/a

35

43

43

43

Continued on the following page. See footnotes overleaf.

42

AHU Kit ­ Installation Instructions ­ 11/2021

Product description

Technical data and limitations ­ PACi systems ­ R32 (cont.)

AHU Kit

PAW-280PAH2(L/M) or PAW-280PAH3M(-1)

Outdoor unit ­ PACi Elite

U-71PZH2E8 U-100PZH2E8 U-125PZH2E8 U-140PZH2E8 U-200PZH2E8 U-250PZH2E8

Nominal cooling capacity

kW

7.1

10.0

12.5

14.0

19.5

23.2

Nominal heating capacity

kW

8.0

11.2

14.0

16.0

22.4

28.0

Piping connections

Liquid pipe

Inch (mm) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 3/8 (9,52) 1/2 (12,7)

Gas pipe

Inch (mm) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 5/8 (15,88) 1 (25,4)

1 (25,4)

Piping length

Min / Max

m

5 / 50

5 / 85

5 / 85

5 / 85

5 / 90

5 / 60

Precharged length (R32)

Max

m

30

30

30

30

30

30

Additional refrigerant charge (R32) due to extended piping g/m

45

45

45

45

60

80

length

Ambient temperature

Cooling (Min / Max) °C DB

-15 / 46

-15 / 46

-15 / 46

-15 / 46

-15 / 46

-15 / 46

Heating (Min / Max) °C WB

-20 / 18

-20 / 18

-20 / 18

-20 / 18

-20 / 24

-20 / 24

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max) m³/h

780 / 1,320 900 / 2,160 1,140 / 2,280 1,200 / 2,400 2,160 / 4,320 2,280 / 5,040

Air intake temperature1

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

°C WB

14 / 25

14 / 25

14 / 25

14 / 25

n/a

n/a

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU DX coil heat exchanger volume Min / Max

dm3

­ / 1.8

1.7 / 2.1

1.7 / 2.1

1.7 / 2.1

2.3 / 4.3

2.7 / 4.3

Heat exchanger face area

Min / Max

m2

­ / ­

0.43 / 0.51 0.43 / 0.51 0.43 / 0.51 0,54 / 1.0 0.66 / 1.0

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max) m³/h

780 / 1,700 900 / 2,400 1,140 / 2,600 1,200 / 2,700 2,160 / 4,600 2,280 / 5,400

subject to restrictions2 Air intake temperature1

Cooling (Min / Max) °C DB

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

3

°C WB

14 / 25

14 / 25

14 / 25

14 / 25

n/a

n/a

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU unit under “special conditions B3”

AHU DX coil heat exchanger volume, Min / Max

dm3

­ / 2.2

1.7 / 3.0

1.7 / 3.0

1.7 / 3.0

2.3 / 5.7

2.7 / 7.1

subject to restrictions3

Additional refrigerant charge (R32) due to larger heat

kg/dm3

0.83

0.83

0.83

0.83

0.83

0.83

exchanger volume

Max. additional refrigerant charge (R32)

kg

0.33

0,74

0,74

0,74

1.16

2.32

Max. pipe length

m

40

65

65

65

90

60

Max. ambient temp. for pump down

°C

35

43

43

43

n/a

n/a

Air volume flow m³/h Outdoor unit 360 510 700 780 870 900 990 1080 1140 1200 1320 1450 1500 1600 1700 1800 1900 2000 2160 2280 2300 2400 2500 2600 2700 2900 3000 3500 4000 4320 4440 4600 5040 5400 U-60PZ2E5 U-71PZ2E5 U100-PZ2E5/8 U125-PZ2E5/8 U140-PZ2E8 U-36PZH2E5 U-50PZH2E5 U-60PZH2E5 U-71PZH2E5/8 U-100PZH2E5/8 U-125PZH2E5/8 U-140PZH2E5/8 U-200PZH2E8 U-250PZH2E8

Maximum allowed air volume flow under “Standard conditions”

Higher maximum allowed air volume flow under “Special conditions A2”: Maximum allowed air intake temperature at AHU DX coil heat exchanger in cooling mode is restriced to 30 °C DB.

1 Air intake temperature entering the AHU DX coil heat exchanger 2 Special conditions A: Using an AHU unit with a higher maximum allowed air volume flow is subject to a restriction of the
“Air intake temperature” to 30 °C DB (instead of 32 °C WB under standard conditions). 3 Special conditions B: Using an AHU DX coil heat exchanger with a larger volume is subject to the following restrictions:
an additional refrigerant charge (R32), which is required irrespective of an additional refrigerant charge which might be needed due to an extended piping length (see calculation example below)
AND a reduced maximum pipe length
AND an ambient air temperature limit above which it may not be possible to pump down the complete refrigerant charge (including all additional refrigerant) into the outdoor unit.

Note: The AHU DX coil must be designed according to Panasonic specification.

Calculation example for total additional refrigerant charge (R32)
Unit: U-60PZ2E5 Pipe length: 40 metres AHU DX coil (supplied by AHU manufacturer): 1,7 dm3 Refrigerant charge at shipment fitted for pipe length within 30 m Pipes additional refrigerant charge: 0.035 kg/m

AHU Kit ­ Installation Instructions ­ 11/2021

43

Product description

AHU DX coil additional refrigerant charge: 0.83 kg/dm3 Refrigerant charge at shipment is sufficient for AHU DX coil volume up to 1,4 dm3
Total additional refrigerant charge calculation ((1.7 dm3 ­ 1.4 dm3) x 0.83 kg/dm3) + (10 m x 0.035 kg/m) = 0.249 kg + 0.35 kg = 0.599 kg

Calculation example for number of passes in the heat exchanger
The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated by the formula:

Minimum number of passes = Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10­4 The calculated value must then be rounded up to the next integer number.

Example
Number of steps: 12 Distance between tube sheets: 1,000 mm Number of row: 3

Minimum number of passes = 12 × 1,000 x 3 × 1.5 × 10­4 = 5.4

3

This value must be rounded up to 6.

This means that the minimum number of passes is 6 passes.

NX Technical data and limitations ­ PACi NX systems ­ R32

AHU Kit

Outdoor unit ­ PACi NX Standard

Nominal cooling capacity

Nominal heating capacity

Piping connections

Liquid pipe

Gas pipe

Piping length

Min / Max

Precharged length (R32)

Max

Additional refrigerant charge (R32) due to extended piping

length

Ambient temperature

Cooling (Min / Max)

Heating (Min / Max)

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max)

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max)

AHU DX coil heat exchanger volume Min / Max

Heat exchanger face area

Min / Max

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max)

subject to restrictions2

Air intake temperature1

Cooling (Min / Max)

Heating (Min / Max) AHU unit under “special conditions B3” AHU DX coil heat exchanger volume, Min / Max subject to restrictions3 Additional refrigerant charge (R32) due to larger heat exchanger volume Max. additional refrigerant charge (R32) Max. pipe length Max. ambient temp. for pump down

kW kW Inch (mm) Inch (mm) m m g/m
°C DB °C WB
m³/h °C DB °C WB °C DB dm3 m2
m³/h
°C DB °C WB °C DB
dm3
kg/dm3
kg m °C DB

U-36PZ3E5 3.6 3.6
1/4 (6.35) 1/2 (12.70)
3 / 15 7.5 0.01
-10 / +43 -15 / +24
540 / 870 18 / 32 14 / 25 16 / 30 1.00 / 1.121 ­ / ­
540 / 870
18 / 32 14 / 25 16 / 30
1.00 / 1.2
0.83
0.07 7.5 n/a

Continued on the following page. See footnotes overleaf.

U-50PZ3E5 5.0 5.0
1/4 (6.35) 1/2 (12.70)
3 / 20 7.5 0.015
-10 / +43 -15 / +24
630 / 990 18 / 32 14 / 25 16 / 30 1.00 / 1.121 ­ / ­
630 / 1,000
18 / 30 14 / 25 16 / 30
1.0 / 1.2
0.83
0.07 15 30

U-60PZ3E5A 6.0 6.0
1/4 (6.35) 1/2 (12.70)
3 / 40 30
0.015

PAW-280PAH3M(-1)

U-71PZ3E5A U-100PZ3E5/8

7.1

10.0

7.1

10.0

1/4 (6.35)

3/8 (9.52)

5/8 (15.88)

5/8 (15.88)

3 / 40

5 / 50

30

30

0.017

0.045

U-125PZ3E5/8 12.5 12.5
3/8 (9.52) 5/8 (15.88)
5 / 50 30
0.045

U-140PZ3E5/8 14.0 14.0
3/8 (9.52) 5/8 (15.88)
5 / 50 30
0.045

-10 / +43 -15 / +24

-10 / +43 -15 / +24

-10 / +43 -15 / +24

-10 / +43 -15 / +24

-10 / +43 -15 / +24

780 / 1,320 18 / 32 14 / 25 16 / 30 1.3 / 1.4
0.43 / 0.51

780 / 1,320 18 / 32 14 / 25 16 / 30 1.3 / 1.4
0.43 / 0.51

900 / 2,160 18 / 32 14 / 25 16 / 30 1.7 / 1.9
0.43 / 0.51

1,140 / 2,280 18 / 32 14 / 25 16 / 30 1.7 / 1.9
0.43 / 0.51

1,200 / 2,400 18 / 32 14 / 25 16 / 30 1.7 / 1.9
0.43 / 0.51

780 / 1,450 780 / 1,600 900 / 2,300 1,140 / 2,520 1,200 / 2,640

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

18 / 30 14 / 25 16 / 30

1.3 / 1.6

1.3 / 1.6

1.7 / 2.6

1.7 / 2.6

1.7 / 2.8

0.83

0.83

0.83

0.83

0.83

0.17

0.17

0.58

0.58

0.74

25

30

35

35

35

30

30

30

30

30

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AHU Kit ­ Installation Instructions ­ 11/2021

Product description

AHU Kit

PAW-280PAH3M(-1)

Outdoor unit ­ PACi NX Elite

U-36PZH3E5 U-50PZH3E5 U-60PZH3E5 U-71PZH3E5/8 U-100PZH3E5/8 U-125PZH3E5/8 U-140PZH3E5/8

Nominal cooling capacity

kW

3,6

5

6

7,1

10

12,5

14

Nominal heating capacity

kW

3,6

5

6

7,1

10

12,5

14

Piping connections

Liquid pipe

Inch (mm) 1/4 (6,35)

1/4 (6,35)

1/4 (6,35)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

3/8 (9,52)

Gas pipe

Inch (mm) 1/2 (12,70)

1/2 (12,70)

1/2 (12,70)

5/8 (15,88)

5/8 (15,88)

5/8 (15,88)

5/8 (15,88)

Piping length

Min / Max

m

3 / 40

3 / 40

3 / 40

5 / 50

5 / 85

5 / 85

5 / 85

Precharged length (R32)

Max

m

30

30

30

30

30

30

30

Additional refrigerant charge (R32) due to extended piping g/m

0,015

0,015

0,015

0,045

0,045

0,045

0,045

length

Ambient temperature

Cooling (Min / Max) °C DB

-15 / +46

-15 / +46

-15 / +46

-15 / +46

-20 / +48

-20 / +48

-20 / +48

Heating (Min / Max) °C WB

-20 / +24

-20 / +24

-20 / +24

-20 / +24

-20 / +24

-20 / +24

-20 / +24

AHU unit under “standard conditions”

Air volume flow

Cooling (Min / Max) m³/h

540 / 870

510 / 990

780 / 1,320 780 / 1,320 900 / 2,160 1,140 / 2,280 1,200 / 2,400

Air intake temperature1

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

18 / 32

°C WB

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

14 / 25

Heating (Min / Max) °C DB

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

16 / 30

AHU DX coil heat exchanger volume Min / Max

dm3

1.0 / 1.3

1.0 / 1.3

1.1 / 1.4

1.2 / 1.8

1.7 / 2.1

1.7 / 2.1

1.7 / 2.1

Heat exchanger face area

Min / Max

m2

­ / ­

­ / ­

­ / ­

­ / ­

0.43 / 0.51

0.43 / 0.51

0.43 / 0.51

AHU unit under “special conditions A2”

Air volume flow,

Cooling (Min / Max) m³/h

540 / 900

630 / 1,080 780 / 1,600 780 / 1,740 900 / 2,610 1,140 / 3,480 1,200 / 3,480

subject to restrictions2

Air intake temperature1

Cooling (Min / Max) °C DB

18 / 32

18 / 32

18 / 30

18 / 30

18 / 30

18 / 30

18 / 30

°C WB Heating (Min / Max) °C DB

14 / 25 16 / 30

14 / 25 16 / 30

14 / 25 16 / 30

14 / 25 16 / 30

14 / 25 16 / 30

14 / 25 16 / 30

14 / 25 16 / 30

3

AHU unit under “special conditions B3”

AHU DX coil heat exchanger volume, Min / Max

dm3

1.0 / 1.5

1.0 / 1.5

1.1 / 1.8

1.2 / 2.2

1.7 / 3.0

1.7 / 3.0

1.7 / 3.0

subject to restrictions3

Additional refrigerant charge (R32) due to larger heat

kg/dm3

0.83

0.83

0.83

0.83

0.83

0.83

0.83

exchanger volume

Max. additional refrigerant charge (R32)

kg

0.17

0.17

0.33

0.33

0.74

0.74

0.74

Max. pipe length

m

25

25

18

40

65

65

65

Max. ambient temp. for pump down

°C DB

n/a

n/a

30

30

30

30

30

360 510 540 630 780 870 900 990 1,080 1,140 1,200 1,320 1,450 1,500 1,600 1,740 1,800 2,000 2,160 2,280 2,300 2,400 2,520 2,610 2,640 2,700 2,900 3,000 3,480 4,000 4,320 4,440 4,600 5,040 5,400

Air volume flow m³/h

Outdoor unit
PACi NX Standard U-36PZ3E5 U-50PZ3E5 U-60PZ3E5 U-71PZ3E5 U100-PZ3E5/8 U125-PZ3E5/8 U140-PZ3E8

PACi NX Elite U-36PZH3E5 U-50PZH3E5 U-60PZH3E5 U-71PZH3E5/8 U-100PZH3E5/8 U-125PZH3E5/8 U-140PZH3E5/8

Maximum allowed air volume flow under “Standard conditions”

Higher maximum allowed air volume flow under “Special conditions A2”: Maximum allowed air intake temperature at AHU DX coil heat exchanger in cooling mode is restriced to 30 °C DB.

1 Air intake temperature entering the AHU DX coil heat exchanger 2 Special conditions A: Using an AHU unit with a higher maximum allowed air volume flow is subject to a restriction of the
“Air intake temperature” to 30 °C DB (instead of 32 °C WB under standard conditions). 3 Special conditions B: Using an AHU DX coil heat exchanger with a larger volume is subject to the following restrictions:
an additional refrigerant charge (R32), which is required irrespective of an additional refrigerant charge which might be needed due to an extended piping length (see calculation example below)
AND a reduced maximum pipe length
AND an ambient air temperature limit above which it may not be possible to pump down the complete refrigerant charge (including all additional refrigerant) into the outdoor unit.

Note: The AHU DX coil must be designed according to Panasonic specification.

Calculation example for total additional refrigerant charge (R32)
Unit: U-71PZH3E5 Pipe length: 40 metres AHU DX coil (supplied by AHU manufacturer): 2.0 dm³ Refrigerant charge at shipment fitted for pipe length within 30 m

AHU Kit ­ Installation Instructions ­ 11/2021

45

Product description

Pipes additional refrigerant charge: 0.045 kg/m AHU DX coil additional refrigerant charge: 0.83 kg/dm³ Refrigerant charge at shipment is sufficient for AHU DX coil volume up to 1.8 dm³
Total additional refrigerant charge calculation ((2.0 dm³ ­ 1.8 dm³) x 0.83 kg/dm³) + (10 m x 0.045 kg/m) = 0.166 kg + 0.45 kg = 0.616 kg

Calculation example for number of passes in the heat exchanger
The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated by the formula:

Minimum number of passes = Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10­4 The calculated value must then be rounded up to the next integer number.

Example
Number of steps: 12 Distance between tube sheets: 1,000 mm Number of row: 3

3

Minimum number of passes = 12 × 1,000 x 3 × 1.5 × 10­4 = 5.4

This value must be rounded up to 6.

This means that the minimum number of passes is 6 passes.

! ATTENTION
Nuisance tripping of high-pressure switch
The outdoor unit is equipped with a high-pressure switch, which stops the operation of the airconditioning unit for protection when the set high- pressure limit is exceeded. Nuisance tripping of the high-pressure switch may occur in heating mode if the heat exchanger pipe thermistor (E2) is not properly positioned or if the limit is not properly set.
Position the heat exchanger pipe thermistor (E2) correctly and set the limit properly in accordance with the instructions given in this document.

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AHU Kit ­ Installation Instructions ­ 11/2021

4 Installation

Installation

4.1 Installation of AHU Kit
WARNING
Electric shock from live power supply cords Electric shock may result from contact with live power supply cords. Wiring installation must only be performed by a qualified electrician. Before starting to work on any machines or devices, always switch off the power supply
and lock it in switched-off position.

! ATTENTION

Damage to the AHU Kit enclosure and to the thermistor and/or expansion valve wires

Exposing the AHU Kit enclosure to direct sunlight can cause overheating and material damage and

should therefore be avoided.

4

Exposing the wires of thermistors or, in case of the ECOi and ECO G systems, of the expansion

valve to the outside and/or to direct sunlight might damage the wires and should therefore be

avoided.

Attach the AHU Kit either directly to the Air Handling Unit or to a wall nearby and make sure that it is not exposed to direct sunlight.

Use protecting wire ducts to avoid exposing the wires of thermistors and the electronic expansion valve to the outside.

4.1.1 MAH2/PAH2 generation
Mount the MAH2/PAH2 generation AHU Kit according to the following instructions. Please note that screws and other fixing materials, which may be required, are not included in the kit. 1. Choose an installation location observing the minimum allowed distances to any adjacent
objects on all sides of the enclosure as shown below (left). 2. Prepare the 4 holes at the installation location, using the dimensions as shown below (right).
The distance between the centre points of the holes must be 254 mm.
254
Above: min. 50 mm

254

Left: min. 50 mm
Front: min. 200 mm

Right: min. 50 mm
Below: min. 100 mm

AHU Kit ­ Installation Instructions ­ 11/2021

47

Installation
3. Loosen the 4 screws in the corners of the enclosure and remove the cover from the enclosure.
4. Mount the backside of the enclosure to the wall or surface using field- supplied fixing screws inserted through the previously prepared holes at each corner.

! ATTENTION
Signal errors through noise from live power supply cords Power supply cords can generate noise, which may cause signal errors, if they are run in close proximity to any extra-low voltage control wiring. Keep 230 V AC power supply wiring apart from the extra-low voltage control wiring for
sensors etc. Route 230 V AC power supply wiring through different cable glands than the extra-low
voltage control wiring.
5. Insert the wiring preferably from below the enclosure through the screwed cable glands and connect the wires to each of the 6 connectors as required.

After having finished wiring and applying power to the AHU Kit, auto- addressing can be performed and the parameters of the thermostat (advanced version only) can be set.

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AHU Kit ­ Installation Instructions ­ 11/2021

Installation
i Important
Please note that the connectors can be unplugged for easy installation. As connectors A and D are intended for connecting the 230 V AC power supply wiring, they have special blind ports, which prevent them from being plugged back into the low-voltage connectors B, C, E or F.
6. Place the cover back on the enclosure and fix it with the 4 screws at the corners.

4.1.2 PAH3 generation
Mount the PAH3 generation AHU Kit according to the following instructions. Please note that screws and other fixing materials, which may be required, are not included in the kit.
1. Choose an installation location observing the minimum allowed distances to any adjacent objects on all sides of the enclosure as shown below (left).
2. Prepare the 4 holes at the installation location, using the dimensions as shown below (right). The distance between the centre points of the holes must be 360 x 460 mm (W x H).

Above: min. 50 mm

360 mm

Left: min. 50 mm Right: min. 80 mm
460 mm 20 mm

Below: min. 100 mm Front: min. 500 mm

20 mm

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Installation
3. Open the front-side door of the enclosure as shown below (left), and mount the backside of the enclosure to the wall or surface using field-supplied fixing screws inserted through the previously prepared holes at each corner as shown below (right).

4. Screw the cable glands, which are supplied loose, into the openings at the bottom of the enclosure.
! ATTENTION
Signal errors through noise from live power supply cords Power supply cords can generate noise, which may cause signal errors, if they are run in close proximity to any extra-low voltage control wiring. Keep 230 V AC power supply wiring apart from the extra-low voltage control wiring for
sensors etc. Route 230 V AC power supply wiring through different cable glands than the extra-low
voltage control wiring.
5. Insert the wiring from below the enclosure through the screwed cable glands and connect the wires to the terminal block as required.

6. After having finished wiring of the AHU Kit, close the front-side door of the enclosure and proceed with the installation of all other required system components (see 4.2 Installation of expansion valve, p. 51 and 4.3 Installation of thermistors, p. 53). The AHU Kit will then be ready for matching the outdoor unit capacity with AHU Kit capacity (see 4.4 Matching outdoor unit capacity with AHU Kit capacity, p. 56).

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AHU Kit ­ Installation Instructions ­ 11/2021

Installation
4.1.3 Installation of refrigerant piping
When installing the refrigerant piping, the following limitations and restrictions need to be observed: Maximum actual and equivalent piping length Maximum branch pipe length to AHU Kit Maximum branch pipe length difference (between longest and shortest piping from the first branch) Dimensions of connecting pipes to heat exchanger of AHU system Precharged pipe length of outdoor unit Additional refrigerant charging amount for longer pipe runs Other technical data and limitations of the relevant outdoor units Local piping design regulations Best practices for piping design Instructions for the safe handling of R32 (see 1.3 Instructions for the safe handling of R32, p. 9)
i Important
For technical data, limitations and restrictions not mentioned in this document, refer to the technical documentation for the relevant ECOi, ECO G, PACi and PACi NX outdoor units.
4.2 Installation of expansion valve
Installation of expansion valve ­ ECOi and ECO G systems
! ATTENTION
Damage to the expansion valve wires Exposing the wires of the expansion valve to the outside and/or to direct sunlight might damage the wires and should therefore be avoided. Attach the AHU Kit either directly to the Air Handling Unit or to a wall nearby and make
sure that it is not exposed to direct sunlight. Use protecting wire ducts to avoid exposing the wires of thermistors and the electronic
expansion valve to the outside.

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51

Installation

When installing the expansion valve, the following limitations and restrictions need to be observed: Wires must not be installed externally. Cable protection such as conduit is required. Do not detach connector. The distance from AHU heat exchanger must not exceed 6 m. Pipe reducers must be installed in the field where applicable. For example, for 10HP ECOi systems, piping size to outdoor unit is Ø 9.52 mm (instead of Ø 15.88 mm*).
AHU heat exchanger
Expansion valve (accessory)
Pipe to the outdoor unit

Max. length: 6 m

Flare connection: Ø 15.88 mm

Pipe to the AHU heat exchanger Pipe to the outdoor unit

Vertical inclination of expansion valve must be less than ±15°.
Expansion valve (MOV)

Pipe to the outdoor unit

Pipe to the AHU heat exchanger

The coil wire must be inserted drooped in the AHU body with the drooping wire being close to the AHU Kit.

AHU Kit

Inside of AHU

Clamp
Drooping wire
i Important
If there are multiple heat exchangers in one ECOi system, an individual expansion valve must be installed for each heat exchanger.

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AHU Kit ­ Installation Instructions ­ 11/2021

Installation
4.3 Installation of thermistors
! ATTENTION
Damage to the thermistor wires Exposing the wires of thermistors to the outside and/or to direct sunlight might damage the wires and should therefore be avoided. Attach the AHU Kit either directly to the Air Handling Unit or to a wall nearby and make
sure that it is not exposed to direct sunlight. Use protecting wire ducts to avoid exposing the wires of thermistors and the electronic
expansion valve to the outside.
When installing the thermistors, the following limitations and restrictions need to be observed: Wires must not be put out of equipments. Wires must not be cut and connector of wires must not be detached. Thermistors must be Identified by the tag which is wound to each thermistor. The head of the thermistor must be attached exactly onto the pipe, because the head is the most sensitive point of the thermistor.
Maximum contact
Most sensitive point of the thermistor
The thermistor wire must point downwards from the thermistor to avoid water reaching the thermistor.

The thermistor wire must be inserted drooped in the AHU body with the drooping wire being close to the AHU Kit.

AHU Kit

Inside of AHU

Clamp
Drooping wire
i Important
If there are multiple heat exchangers in one ECOi system, an individual thermistor must be installed for each heat exchanger.

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53

Installation
4.3.1 Installation of thermistor on gas pipe
Installation of thermistor on gas pipe ­ ECOi and ECO G systems
Mount “E3” thermistor to the gas pipe of the AHU heat exchanger according to the following instructions. For PAW-160MAH2(L/M) 1. Attach the gas pipe thermistor onto the collecting gas pipe in the heat exchanger.
2. Cover the thermistor and pipe with aluminum tape.
3. Cover the aluminum tape with thermal insulation.
4. Fix thermal insulation and wiring with two bands. Then, run the wire downwards in a loop, to avoid putting tension to it.
For PAW-280MAH2(L/M) and PAW-560MAH2(L/M) 1. Upon delivery, for PAW- 280MAH2(L/M) and PAW-560MAH2(L/M) there is a sensor sleeve
soldered to the gas pipe after the expansion valve: Insert the sensor together with some heat sink paste into the sensor sleeve. 2. Fasten the sensor in an appropriate way (e.g. with a little clip) to prevent it from falling out of the sleeve.

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AHU Kit ­ Installation Instructions ­ 11/2021

Installation
4.3.2 Installation of thermistor on liquid pipe
Mount “E1” thermistor to the liquid pipe of the AHU heat exchanger according to the following instructions. 1. Attach the liquid pipe thermistor to the liquid pipe located in the lowest position after the
distributor in the heat exchanger.
2. Cover the thermistor and pipe with aluminum tape.
3. Cover the aluminum tape with thermal insulation.
4. Fix thermal insulation and wiring with two bands. Then, run the wire downwards in a loop, to avoid putting tension to it.
4.3.3 Installation of thermistor on heat exchanger pipe middle
Installation of thermistor on heat exchanger pipe middle ­ PACi and PACi NX NX systems
Mount “E2” thermistor to the heat exchanger pipe middle according to the following instructions. 1. Attach the heat exchanger pipe middle thermistor in the middle of each pass-line (pipe) in the
heat exchanger.

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55

Installation
2. Cover the thermistor and pipe with aluminum tape (field-supplied).
3. Fix thermistor with two bands. Then, run the wire downwards in a loop, to avoid putting tension to it
4. Cover the aluminum tape with thermal insulation. And also cover the sensor (copper portion) with thermal insulation completely.

4.3.4 Installation of thermistor for suction and discharge air stream
Mount the suction and discharge air thermistors according to the following instructions.
1. For ECOi, ECO G, PACi and PACi NX systems, attach the suction air thermistor (TA) to the position where air suction temperature can be measured.
2. In addition to this, for ECOi and ECO G systems attach also the discharge thermistor (BL) to the position where air discharge temperature can be measured.
3. In case of using the additional thermostat (advanced version only) for: a. target temperature setting based on ambient temperature, install the 3-wired temperature sensor in a protected location suitable for detecting the proper ambient temperature (avoid direct sunlight and moisture); b. demand control based on room supply air temperature install the 3-wired temperature sensor in the blow-out duct of the AHU where the proper air temperature can be measured.
4.4 Matching outdoor unit capacity with AHU Kit capacity
Matching outdoor unit capacity with AHU Kit capacity ­ PACi and PACi NX NX systems
As all AHU Kit models (PAW-280PAH2(L/M) or PAW-280PAH3M) have only one fixed capacity and can be combined with the complete range of PACi and PACi NX systems, where outdoor unit capacities vary from 3.6 (PACi range) or 2.5 (PACi NX range) to 25 kW, it is necessary to change the settings so that the default capacity check of the PACi or PACi NX outdoor unit is ignored or the outdoor unit capacity is matched with the AHU Kit capacity.

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AHU Kit ­ Installation Instructions ­ 11/2021

Installation

There are three different methods to achieve this aim.
Method A: Cutting JP001 to ignore capacity One possibility is to cut jumper JP001 on the outdoor unit main PCB.
i Important
Method A is only applicable to the following combinations of PACi outdoor units and AHU Kits: PACi PEY/PE outdoor units (R410A) and PAH2/PAH3 AHU Kit models PACi PZ2/PZH2 outdoor units (R32) and PAH2/PAH3 AHU Kit models

To cut jumper JP001 on the PACi outdoor unit main PCB, complete the following steps:

1. On the PACi outdoor unit PCB, cut the wire of jumper JP001 at two positions, and take the cut
jumper leads off. Depending on the PACi outdoor unit model, it can be found on the main PCB at one of the following positions:

JP001

JP001

Standard ­ R410A U-60PEY2E5 U-71PEY2E5
Standard ­ R32 U-60PZ2E5 U-71PZ2E5

JP001

Elite ­ R410A U-36PE2E5A U-50PE2E5A U-60PE2E5A
Elite ­ R32 U-36PZH2E5 U-50PZH2E5 U-60PZH2E5

Standard ­ R410A U-100PEY1E5 U-125PEY1E5 U-100PEY1E8 U-125PEY1E8 U-140PEY1E8

Elite ­ R410A U-71PE1E5A U-100PE1E5A U-125PE1E5A U-140PE1E5A U-71PE1E8A U-100PE1E8A U-125PE1E8A U-140PE1E8A

Standard ­ R32 U-100PZ2E8 U-125PZ2E8 U-140PZ2E8

Elite ­ R410A U-200PE2E8A U-250PE2E8A
Elite ­ R32 U-200PZH2E8 U-250PZH2E8

JP001

JP001

JP001

Standard ­ R32 U-100PZ2E5 U-125PZ2E5 U-140PZ2E5

Elite ­ R32 U-71PZH2E5 U-100PZH2E5 U-125PZH2E5 U-140PZH2E5

Elite ­ R32 U-71PZH2E8 U-100PZH2E8 U-125PZH2E8 U-140PZH2E8

AHU Kit ­ Installation Instructions ­ 11/2021

57

Installation
2. Place a NOTE label, which indicates that the jumper wire has been cut, in the following designated areas on the outdoor unit.
NOTES*

NOTES*

• Position of designated area for NOTES label depends on model type.

Method B: Changing outdoor unit setting to ignore capacity Another possibility is to change the outdoor unit settings by using a separate standard wired remote controller, CZ-RTC2 or CZ-RTC4, which can be obtained from Panasonic as optional service parts.
i Important
Method B is only applicable to the following combinations of PACi outdoor units and AHU Kits: PACi PEY/PE outdoor units (R410A) and PAH2/PAH3 AHU Kit models PACi PZ2/PZH2 outdoor units (R32) and PAH2/PAH3 AHU Kit models

Required accessories:
Optional standard wired remote controller: CZ-RTC2 or CZ-RTC4 (available from Panasonic as optional service parts, CZ-RTC2: CV6233169033 and CZ-RTC4: CV6233317854)
Optional special service wiring: CV6242785082 or PAW-MRC (available from Panasonic as optional service parts) or alternative connector

To connect the remote controller and subsequently change the relevant settings, complete the following steps:
1. Connect the maintenance remote controller to the blue 3-pole CN-RC plug on the main PCB of the PACi outdoor unit using the optional special service wiring CV6242785082 or PAW-MRC (as an alternative, you can also use any unused indoor unit connector (E3, PNL, FS, RC) or temporarily disconnect one of those wires from the AHU kit itself). Depending on the PACi outdoor unit model, the CN-RC plug can be found at one of the following positions:
a.

Outdoor unit maintenance remote controller
Optional special service wiring (CV6242785082 or PAW-MRC)

CN-RC

Standard ­ R410A U-60PEY2E5 U-71PEY2E5
Standard ­ R32 U-60PZ2E5 U-71PZ2E5

Elite ­ R410A U-36PE2E5A U-50PE2E5A U-60PE2E5A
Elite ­ R32 U-36PZH2E5 U-50PZH2E5 U-60PZH2E5

Standard wired remote controller CZ-RTC4 (CV6233317854)

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AHU Kit ­ Installation Instructions ­ 11/2021

b.
Outdoor unit maintenance remote controller
Optional special service wiring (CV6242785082 or PAW-MRC)

CN-RC

Standard wired remote controller CZ-RTC4 (CV6233317854)

c.
Outdoor unit maintenance remote controller

CN-RC

Optional special service wiring (CV6242785082 or PAW-MRC)

Standard wired remote controller CZ-RTC4 (CV6233317854)
d.
Outdoor unit maintenance remote controller
Optional special service wiring (CV6242785082 or PAW-MRC)

CN-RC

Standard wired remote controller CZ-RTC4 (CV6233317854)
e.
Outdoor unit maintenance remote controller
Optional special service wiring (CV6242785082 or PAW-MRC)

CN-RC

Standard wired remote controller CZ-RTC4 (CV6233317854)

Installation

Standard ­ R410A U-100PEY1E5 U-125PEY1E5 U-100PEY1E8 U-125PEY1E8 U-140PEY1E8

Elite ­ R410A U-60PE1E5A U-71PE1E5A U-100PE1E5A U-125PE1E5A U-140PE1E5A U-71PE1E8A U-100PE1E8A U-125PE1E8A U-140PE1E8A

Elite ­ R410A U-200PE2E8A U-250PE2E8A
Elite ­ R32 U-200PZH2E8 U-250PZH2E8

Standard ­ R32 U-100PZ2E5 U-125PZ2E5 U-140PZ2E5

Standard ­ R32 U-100PZ2E8 U-125PZ2E8 U-140PZ2E8

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Installation
f.
Outdoor unit maintenance remote controller
Optional special service wiring (CV6242785082 or PAW-MRC)

CN-RC

Elite ­ R32 U-71PZH2E8 U-100PZH2E8 U-125PZH2E8 U-140PZH2E8

Standard wired remote controller CZ-RTC4 (CV6233317854)

2. Verify that the display of the maintenance remote controller is working.
3. Simultaneously press the “Spanner” and “Leave Home” buttons for at least 4 seconds. Depending on which model you are using as maintenance remote controller, CZ-RTC2 or CZRTC4, the buttons look differently and are located at different positions:

CZ-RTC2

CZ-RTC4

4. With the Temperature “UP” and “DOWN” buttons () scroll to parameter “07”. 5. With the Timer “UP” and “DOWN” buttons () change the parameter value from the factory
default “000” to “001”. 6. Confirm the new setting by pressing the “SET” button followed by the “Spanner” button. 7. After that, you can disconnect the maintenance remote controller from the outdoor unit PCB.
Method C: Adapting AHU capacity to PACi outdoor unit capacity NX The last possibility is to adapt the AHU Kit capacity to match the capacity of the currently used
PACi or PACi NX outdoor unit.
i Important
Method C is applicable to the following combinations of PACi outdoor units and AHU Kits: PACi PEY/PE outdoor units (R410A) and PAH2/PAH3 AHU Kit models PACi PZ2/PZH2 outdoor units (R32) and PAH2/PAH3 AHU Kit models PACi NX PZ3/PZH3 outdoor units (R32) and PAH3 AHU Kit models
To change the relevant setting, invoke the ,,Detailed settings” mode on the AHU Kit’s integrated remote controller (CZ-RTC5B / CZ-RTC6BL).
1. Verify that the display of the integrated remote controller is working, then stop the system and power it on again before performing the following steps.

60

AHU Kit ­ Installation Instructions ­ 11/2021

Installation

2. Simultaneously press and hold the relevant three-button combination on the remote controller (see below) for at least 4 seconds, until the “Maintenance func” screen appears on the display. Note: If the system is a combination of a PACi NX outdoor unit (PZ3/PZH3) and a PAH3 AHU Kit model, this step has to be performed within 30 seconds after powering on the system while auto-addressing is in progress and the message “Assigning” is shown on the display, otherwise error E16 will occur. In this case, repeat steps 1 and 2 and mind the time limit.

PAH2 models: CZ-RTC5B

PAH3 model: CZ-RTC6BL

+ +

3. On the “Maintenance func” screen, scroll through the menu items with the “UP” and “DOWN” buttons, and select “Detailed settings” by pressing the “ENTER” button when it is highligted in the list.

CZ-RTC5B

CZ-RTC6BL

—

Maintenance func 20:30 (THU)

5. Sensor info. 6. Servicing check 7. Simple settings 8. Detailed settings

Sel.

Page [ ] Confirm

—

Maintenance func XX / XX

Simple settings Detailed settings Auto address

[] []

4. On the “Detailed settings” screen, the “Unit No.” option will be highlighted. Note: If auto-addressing has been completed before, the relevant unit number will be displayed, or if not, “All” will be displayed instead. With the “UP” and “DOWN” buttons, change the value to the unit number of the relevant system, and press the “ENTER” button to confirm the new setting.

CZ-RTC5B

CZ-RTC6BL

—

Detailed settings

20:30 (THU)

Unit no. Code no. Set data

3-1

10

0001

Sel. Next

—

Detailed settings

Unit no.

1-1

Code no. 000010

Set data []

0001 []

5. Highlight the “Code No.” option using the “RIGHT” button (RTC5B) or the “DOWN” and “ENTER” buttons (RTC6BL) respectively. With the “UP” and “DOWN” buttons, select the value “11” (Code No. 11 = Adapting indoor unit capacity), and press the “ENTER” button to confirm this setting.

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61

Installation

CZ-RTC5B

—

Detailed settings

20:30 (THU)

Unit no. Code no. Set data

3-1

11

0001

Sel. Next

CZ-RTC6BL

—

Detailed settings

Unit no.

1-1

Code no. 000011

Set data 0001

[] []

6. Highlight the “Set data” option using the “RIGHT” button (RTC5B) or the “DOWN” and “ENTER” buttons (RTC6BL) respectively. With the “UP” and “DOWN” buttons, change the default value according to the table below and press the “ENTER” button to confirm the new setting and return to the initial “Detailed Settings” screen (as shown in step 4).

CZ-RTC5B

CZ-RTC6BL

—

Detailed settings

20:30 (THU)

Unit no. Code no. Set data

3-1

10

0001

Sel. [ ] Confirm

—

Detailed settings

Unit no.

1-1

Code no. 000011

Set data []

000xx1 []

Settings for Code No. “11” (Adapting AHU capacity to PACi outdoor unit capacity)

Outdoor unit capacity
U-25… U-36… U-50… U-60… U-71…
U-100…
U-125…
U-140…
U-200… U-250…

PACi Outdoor unit model

Standard R410A R32

Elite R410A

…PEY2E5
…PEY2E5
…PEY1E5 …PEY1E8 …PEY1E5 …PEY1E8 …PEY1E5 …PEY1E8

…PZ2E5
…PZ2E5
…PZ2E5 …PZ2E8 …PZ2E5 …PZ2E8 …PZ2E5 …PZ2E8

…PE2E5A
…PE2E5
…PE2E5A
…PE1E5A …PE1E8A …PE1E5A …PE1E8A …PE1E5A …PE1E8A …PE1E5A …PE1E8A …PE2E8
…PE2E8

R32
…PZH2E5 …PZH2E5 …PZH2E5 …PZH2E5 …PZH2E8 …PZH2E5 …PZH2E8 …PZH2E5 …PZH2E8 …PZH2E5 …PZH2E8 …PZH2E8 …PZH2E8

NX PACi NX Outdoor unit model

Standard Elite

R32

…PZ3E5

…PZ3E5

…PZH3E5

…PZ3E5

…PZH3E5

…PZ3E5A

…PZH3E5

…PZ3E5A

…PZH3E5 …PZH3E8

…PZ3E5 …PZ3E8

…PZH3E5 …PZH3E8

…PZ3E5 …PZ3E8

…PZH3E5 …PZH3E8

…PZ3E5 …PZ3E8

…PZH3E5 …PZH3E8

Setting for Code No. “11”
0002 0005 0009 0011 0012 0015 0017 0018 0021 0023

7. Only for R32 models of the PACi PZ2/PZH2 range in combination with PAH2 AHU Kit models:
Press the Temperature “UP” button () just once shortly, in order to scroll to parameter “2C”. With the Timer “UP” and “DOWN” buttons () modify the parameter value from the factory default “0002” to the new value “0006” (to set the AHU Kit to R32).
Confirm the new setting by pressing the “SET” button.

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Installation

8. Once the setting procedure is completed, exit the “Detailed settings” mode by pressing the “RETURN” button (RTC5B) or “MENU” button (RTC6BL) respectively. This will invoke a confirmation message (see below). Select “YES” with the “LEFT” and “RIGHT” buttons (RTC5B) or “UP” and “DOWN” buttons (RTC6BL) respectively, and then press the “ENTER” button to finish the “Detailed settings” mode and return to the normal remote controller screen.

CZ-RTC5B

CZ-RTC6BL

—

—

Detailed settings

20:30 (THU)

Unit noE.xit adneCdtaoriledesedtasnreot?t.tings Set data

ALL

01

0002

YES

NO

Sel. Next

—

—

Detailed settings Exit detailed

Unit nos.ettings 1-1

Codaenndo.restart?10

YES

Set data 0001

NO

[] []

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63

Electrical Wiring
5 Electrical Wiring

5.1 General precautions on wiring
WARNING
Electric shock from live power supply cords Electric shock may result from contact with live power supply cords. Wiring installation must only be performed by a qualified electrician. Before starting to work on any machines or devices, always switch off the power supply
and lock it in switched-off position.

CAUTION

The following precautions need to be followed strictly in the context of working on any electrical wiring, in order to avoid hazardous situations, which could result in minor or moderate injury.

Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram.

This equipment is not provided with a power supply cord. A circuit breaker must be

5

incorporated in the fixed wiring in accordance with national wiring regulations. The circuit breaker must be approved, suitable for the voltage and current ratings of equipment and

have a contact separation in all poles.

To prevent possible hazards from insulation failure, the unit must be grounded.

Each wiring connection must be done in accordance with the wiring system diagram. Wrong wiring may cause the unit to misoperate or become damaged.

Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.

Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no responsibility for any damage or misoperation that occurs as a result of
such unauthorized changes.

Regulations on wire diameters differ from locality to locality. For field wiring rules, please refer to the relevant local electrical codes before beginning.
You must ensure that installation complies with all relevant rules and regulations.

To prevent malfunction of the air conditioner caused by electrical noise, care must be taken when wiring as follows:

The remote control wiring and the inter-unit control wiring should be wired apart from the inter-unit power wiring.

Use shielded wires for inter-unit control wiring (between units) and ground the shield on both sides.

If the power supply cord of this appliance is damaged, it must be replaced by a repair shop designated by the manufacturer, because special-purpose tools are required.

i Important
For the recommended wiring lengths and diameters, please see 5.5 Wiring system diagrams,
p. 87.

5.2 Connection of wiring to terminals
Connect wiring to the terminals according to the following instructions.

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Electrical Wiring
Stranded wire 1. Cut the wire end with cutting pliers, then strip the insulation to expose the stranded wiring about
10 mm and tightly twist the wire ends.
Wire-end sleeve

Strip 10 mm

2. Using a flat-blade screwdriver, loosen the terminal screw(s) on the terminal plate.

3. Attach a wire-end sleeve to each stripped wire end using a crimping tool.

4. Place the wire-end sleeve into the socket on the connector and replace and tighten the removed terminal screw using a flat-blade screwdriver.

Special washer

Screw

Wire-end sleeve Wire

Terminal plate Wire

Screw and special washer Wire-end sleeve

Shielded wire

5

1. Remove cable sheath not to scratch braided shield.

2. Unbraid the braided shield carefully and twist the unbraided shield wires tightly together. Insulate the shield wires by covering them with an insulation tube or wrapping insulation tape around wire.

Insulation tape

Shield mesh

3. Remove insulation of signal wire.

8 mm

Insulation tape

Shield mesh

4. Attach wire-end sleeves to the signal wires and the shield wires insulated in step 2 using a crimping tool.

Wire-end sleeve
5. Connect the shield for the inter-unit control wiring to ground.

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65

Electrical Wiring
5.3 Terminal board layout
5.3.1 MAH2/PAH2 models
Terminal layout ­ Main terminal board (CR-UXRP71B-P)

5
66

= Input or Output necessary to connect.

= Input or Output can be connected if required.

Section A
Connections

No. Name 10 COM 9 DO2 8 COM 7 D01 6 Blind 5 PT10
4 PT9
3 PT8 2 FD2 1 FD1

In / Out O O O O
Unused I / O
I / O
I O O

Allocation Alarm Signal Alarm Signal Operation Signal Operation Signal
Advanced: Red wire / Medium: White wire Advanced: Red wire / Medium Red wire Advanced: White wire / Medium: not used Fan Signal Potential for FD2

Function
Alarm Signal
Operation Signal
Advanced version: Connection of PT-100 temperature sensor of thermostat TR-16 /TR-16e Medium version: Connection of analogue output temp. signal
Control of an additional external fan or additional external air handling unit

Description
External Potential: max. 230 V AC / 3 A
External Potential: max. 230 V AC / 3 A
Take care of wiring colours! Note: For advanced version connect only, in case thermostat TR-16/TR-16e is being used. For medium version: PT10 = negative pole (“­”) and PT9 = positive pole (“+”)
Internal potential: 12 V DC

Section B
Connections

No. Name 10 FS2 9 FS1 8 FI2 7 FI1 6 EX2 5 EX1 4 TA2 3 TA1 2 BL2
1 BL1

In / Out I I I

Allocation Float switch Potential for FS2 Filter contact

I Potential for FI2

I EXCT-Contact I Potential for EXCT I No polarity

I No polarity

I No polarity

I No polarity

To be continued on next page.

Function Float switch (ex factory bridged)
Filter contact
EXCT-Contact (external thermostat off switch) Suction Temperature Sensor TA (included) (Room Temperature Sensor)

Description
Internal Potential: 12 V DC
Internal Potential: 5 V DC Note: For activating filter input, verify in Detailed Settings that code 2A is set to “0000”
Internal Potential: 5 V DC

Discharge Temperature Sensor BL (included only with PAW-xxxMAH2(L/M))

AHU Kit ­ Installation Instructions ­ 11/2021

Electrical Wiring

Section C
Connections

No. Name 10 ON6 9 ON5 8 ON4 7 ON3 6 ON2
5 ON1
4 COM 3 DI3 2 DI2

In / Out Allocation O Recirculat. Operation

O Heating Operation

O Cooling Operation O Thermostat ON O Defrost Operation

O

Potential for ON2 to ON6 (12 V DC)

I Potential for DI1 to DI3

I Digital Input 3

I Digital Input 2

1 DI1

I Digital Input 1

Function

Comment

Status Outputs

Internal Potential: 12 V DC

Digital Inputs (For information on functionality refer to section “Terminal layout ­ CZ-CAPBC2 / ACC-SP1A” in this document)

2 types of usage: a) Potential-free:
Keep S3 of CZ-CAPBC 2/ ACC-SP1A on “NON VOLTAGE”. b) 12 to 24 V DC, 10 mA external: Change S3 of CZ-CAPBC2 / ACC-SP1A to “VOLTAGE”.

Section D

Connections

No. Name In / Out Allocation

Function

Comment

10 BLIND

Unused

9 HU2 8 HU1

O No polarity O No polarity

External Humidifier Control

Internal Potential: 230 V AC / max. 3 A

7 2Z-7 6 OP3

I Potential for OP3 I Fan Alarm

Fan Alarm Input (Unit will only operate if this contact is closed, otherwise error code P01 will be displayed.)

Internal Potential: 230 V AC

5 1Z-3 4 1Z-5

O No polarity O No polarity

Fan Start ­ Stop Signal

External Potential: max. 230 V AC / 5 A

5

3

I Protective earth

Protective Earth Conductor

2N 1L

I Neutral I Live

Neutral Terminal Live Terminal

External Potential: 230 V AC, max. 1 A

Section E
Connections

No. Name In / Out Allocation

10 M1-6

I WHT

9 M1-5

I GRY

8 M1-4

I BLK

7 M1-3

I YEL

6 M1-3

I RED

5 M1-1

I ORG

4 R2

I No polarity

3 R1

I No polarity

2 U2 (OC)

I

No polarity

1 U1 (OC)

I

No polarity

To be continued on next page.

Function
Expansion valve (only ECOi and ECO G)

Comment
Required only for PAW-160MAH2(L/M) and PAW-280MAH2(L/M)

Terminal for Group Wiring (RC connection)
Communication bus wiring

Internal Potential: 16 V DC

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67

Electrical Wiring
Section F
Connections

No. Name

10

M2-6 (FREE)

In / Out I

Allocation GRY

9 M2-5

I ORG

8 M2-4

I WHT

7 M2-3

I RED

6 M2-2

I/O RED

5 M2-1

4

E2-2 / E3-2

3

E2-1 / E3-1

2 E1-2

1 E1-1

O WHT
I No polarity
I No polarity I No polarity I No polarity

Function Advanced & Medium: Activation of demand control Advanced & Medium: Activation of demand control Advanced & Medium: Analogue input Demand Advanced & Medium: Analogue input Demand
Advanced only: Analogue output
Advanced only: Analogue output

Comments
Remove bridge for use of demand control (if bridge is intact and in place, temperature setpoint control is active)
Advanced & Medium: Negative potential (­10 V DC) for demand control
Advanced & Medium: Analogue input (+10 V DC) for demand control
Advanced only: Internal potential (+10 V DC) from TR-16/TR-16e via bridge
Advanced only: Internal potential 10 V DC from TR-16/TR-16e via bridge

Sensor E2 / TH3 (PACi) or Sensor E3 / TH4 (ECOi), respectively

Sensor E1 / TH2

Terminal layout ­ PAW-T10 (for advanced and light versions only)

PAW-T10 PCB

Connections

No. In / Out Allocation

Function

Comments

1 I (1) Potential for I (2)

5

2 I (2) ON / OFF

External Start / Stop

3 I (3) Lock RC 4 I (4) Potential for I (3)

Lock (Contact closed) or Unlock (Contact open) remote controller, respectively

5 O (5) Operation Signal NC 6 O (6) Operation Signal NO 7 O (7) Potential for O (5) and O (6)

Operation Signal as normally open or normally closed contact

External Potential: max. 250 V AC / 5 A

8 O (8) Alarm Signal NC 9 O (9) Alarm Signal NO 10 O (10) Potential for O (8) and O (9)

Alarm Signal as normally open or normally closed contact

External Potential: max. 250 V AC / 5 A

i Important
For details about the connection and functions of the PAW-T10 PCB, please refer to the separate
installation instructions for PAW-T10.

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Electrical Wiring
Terminal layout ­ CZ-CAPBC2 / ACC-SP1A (for advanced and medium versions only)
CN8
ON

DO1
(Start)
COM
DO2
(Alarm)
COM

S2
JP6 JP5 JP4 JP3 JP2 JP1

S5

ON

1

OFF

4 CN2

1

BOOT MODE NORMAL

S1
ON

D3 1234

4

S3
VOLTAGE NON VOLTAGE 0-140
S4
0-10V

1

5

10

15 CN1

+ T10
– (12V)
R/C LINE A
(U.H.J1.A.J2)
SG R/C LINE B
12V (T.G)
GND
+ DI3
+ DI2
+ DI1
– COM
+ AI
–
+ AO
–

CZ-CAPBC2 interface, terminal block CN1

Connections

No. Polarity Name Allocation

Function

Comments

CN1

+ T10
– (12V)

15 + 14 ­ 13 12

T10 (12V)
R/C LINE A

By factory default connected By factory default connected By factory default connected By factory default connected

12 V power supply Remote control line A

R/C LINE A
(U.H.J1.A.J2)
SG R/C

11 SG 10 12V

R/C LINE B

Not used Not used

Remote control line B

5

LINE B

9 GND

Not used

12V (T.G)

GND

8+

DI3

By factory default connected to terminal contacts

+ DI3 + DI2 + DI1

7+ 6+

DI2

By factory default connected to terminal contacts

DI1 By factory default connected to terminal

Digital input

– COM

contacts

5­

COM By factory default connected to terminal

AI

contacts

–

+ AO
–

4+ 3­

By factory default connected to terminal contacts AI By factory default connected to terminal

Analog input (Change temperature setting)

contacts

2+ 1­

Advanced version: Not connected to terminal

contacts.

Medium version: By factory default connect-

AO

ed to terminal contacts

Analog output (Room temperature

Advanced version: Not connected to terminal monitor)

contacts.

Medium version: By factory default connect-

ed to terminal contacts

CZ-CAPBC2 interface, terminal block CN2

Connections

No. Name Allocation

1

DO1

By factory default connected to terminal contacts

1

DO1
(Start)

2

COM

By factory default connected to terminal contacts

COM

DO2
(Alarm)

3

DO2

By factory default connected to terminal contacts

4 CN2

COM

4

COM

By factory default connected to terminal contacts

Function Digital output 1 (Start output)
Digital output 2 (Alarm output)

Comments

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69

Electrical Wiring

CZ-CAPBC2 digital input functionality The CZ-CAPBC2 digital inputs offer the following functionality settings.

Switch S1: Control type setting

S1
ON

ON

D3 1234

1

4

OFF

­ Off

On

Control

S1

Control

S1

type

1

2

3

4

type

1

2

3

4

0

­

­

­

­

8

­

­

­

1

­

­

­

9

­

­

2

­

­

­

101

­

­

3

­

­

11

­

4

­

­

­

12

­

­

5

­

­

13

­

6

­

­

14

­

7

­

15

Control type

Input 1 (DI1)

open close

close open

Input 2 (DI2)

open close

close open

Input 3 (DI3)

open close

close open

Voltage of NO contact: static / pulses

0 Start Fan low

Indoor units stop when all of Input 1, 2, 3 are open

Start Fan medium

Indoor units stop when all of Input 1, 2, 3 are open

Start Fan high

Indoor units stop when all of Input 1, 2, 3 are open

All inputs: static

1 Start Prohibit R/C Start/Stop

Stop Prohibit R/C Start/Stop

Start Accept R/C Start/Stop

Stop

Stop

­

Prohibit R/C

Prohibit R/C

Start/Stop

Start/Stop

Input 1, 2: static Input 3: pulse

2 Start

Stop

Accept R/C

Stop

Stop

­

Input 1, 2: static

Prohibit R/C Start

Prohibit R/C

Start/Stop

Prohibit R/C

Prohibit R/C

Input 3: pulse

Start/Stop

Start/Stop

Start/Stop

5

3 Start < > Stop

­

Start < > Stop

­

Stop

­

All inputs: pulse

Prohibit R/C

Accept R/C

Prohibit R/C

Start/Stop

Start/Stop

Start/Stop

4 Start

­

Prohibit R/C

Start/Stop

Start

­

Accept R/C

Start/Stop

Stop

­

Prohibit R/C

Start/Stop

5 Start

­

Prohibit R/C Start

Accept R/C

­

Start/Stop

Stop

­

Prohibit R/C

Start/Stop

6 Start

­

Stop

­

­

­

Accept R/C

Accept R/C

Start/Stop

Start/Stop

7 Start < > Stop

­

Prohibit R/C

Start/Stop

Start < > Stop

­

Accept R/C

Start/Stop

Set thermostat OFF

Release thermostat OFF

Input 1, 2: static Input 3: pulse

8­

­

­

­

­

­

­

9 Heat

­

Cool

­

Fan

­

All inputs: pulse

10 Heat Start

Indoor units stop

Cool

when all of Input 1, 2,

3 are open

Start

Indoor units stop

Fan

when all of Input 1, 2,

3 are open

Start

Indoor units stop when all of Input 1, 2, 3 are open

All inputs: static

11 ­

­

­

­

­

­

­

12 ­

­

­

­

­

­

­

13 ­

­

­

­

­

­

­

14 ­

­

­

­

­

­

­

15 Start

Stop

­

­

Set thermostat

Release

All inputs: static

OFF

thermostat OFF

Notes: 1 Control type No. 10 is the factory default. 2 If digital input signals are to be used for mode change only without using the start/stop function, set switch S1 to control
type No. 9. 3 By default, CZ-CAPBC2 digital inputs are set for accepting non- voltage signals from dry contacts.

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Electrical Wiring

Switch S3: Digital input configuration setting (voltage/non-voltage signals)
Depending on the BMS digital input (DI) configuration, switch S3 on the CZ- CAPBC2 interface can be set for the digital input terminals to accept either non-voltage signals from dry contacts (factory default: “NON VOLTAGE”) or 12 ­ 24 V DC signals (“VOLTAGE”).

Set S3 to “VOLTAGE”, if digital inputs are to accept
12 ­ 24 V DC signals

S3
VOLTAGE NON VOLTAGE

5

Keep S3 default setting “NON VOLTAGE”, if digital inputs are to accept non- voltage signals from dry contacts.

i Important
For more details about the connectio

References

• Panasonic - Heating and Cooling solutions
• Panasonic PRO Club

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