Panasonic R410A Air Conditioner Instruction Manual

Panasonic R410A Air Conditioner

Product Information

The product is an air conditioner that uses either the refrigerant R32 or R410A. It is important to confirm the room space and the amount of refrigerant before using R32. Additionally, an optional R32 refrigerant leakage detection sensor can be installed if needed.

The model number for the indoor units is as follows:

• U2 4-Way Cassette: S-22MU2E5BN, S-28MU2E5BN, S-36MU2E5BN, S-45MU2E5BN, S-56MU2E5BN, S-60MU2E5BN
• U2 4-Way Cassette: S-73MU2E5BN, S-90MU2E5BN, S-106MU2E5BN, S-112MU2E5BN, S-140MU2E5BN, S-160MU2E5BN

The product also includes optional parts such as panels (CZ-KPU3 series).

Product Usage Instructions

1. Read through the Installation Instructions before proceeding with the installation. Pay special attention to the IMPORTANT! section at the top of the page.
2. Prepare the necessary tools for installation (not supplied).
3. Check the accessories supplied with the unit.
4. Determine the type of copper tube and insulation material needed.
5. Gather any additional materials required for installation.
6. Select the appropriate site for installation, considering the indoor unit.
7. Follow the step-by-step instructions to install the indoor unit, including suspending it, placing it inside the ceiling, processing tubing, installing the drain pipe, and wiring for the 4-Way Cassette type.
8. Ensure proper electrical wiring, following the general precautions and referring to the wiring system diagrams.
9. Process the tubing by connecting the refrigerant tubing, connecting tubing between indoor and outdoor units, insulating the refrigerant tubing, taping the tubes, and finishing the installation.
10. If using optional parts like a timer remote controller, high-spec wired remote controller, panel for cassette, or wireless remote controller, refer to their respective installation instructions.
11. Take necessary precautions for the test run of the air conditioner.
12. Perform a checklist of tasks after completing the installation work.
13. Refer to the appendix for care and cleaning instructions, troubleshooting tips, and energy-saving tips.
14. Read the important information regarding the refrigerant used.

INSTALLATION INSTRUCTIONS

Air Conditioner
This air conditioner uses the refrigerant R32 or R410A. In case of using R32, confirm the room space and the amount of refrigerant in advance. Install the optional “R32 refrigerant leakage detection sensor” as needed. (See Section “Check of Density Limit”.)

Model No. Indoor Units

Type

Indoor Units Type

U2

4-Way Cassette

Rated Capacity

22

28

36

45

56

60

S-22MU2E5BN S-28MU2E5BN S-36MU2E5BN S-45MU2E5BN S-56MU2E5BN S-60MU2E5BN (CZ- KPU3)* (CZ-KPU3*) (CZ-KPU3)* (CZ-KPU3)* (CZ-KPU3*) (CZ-KPU3)*

Type

Indoor Units Type

73

Rated Capacity

90

106

112

140

160

U2

4-Way Cassette

S-73MU2E5BN S-90MU2E5BN S-106MU2E5BN S-112MU2E5BN S-140MU2E5BN S-160MU2E5BN (CZ-KPU3)* (CZ-KPU3*) (CZ-KPU3)* (CZ-KPU3)* (CZ-KPU3*) (CZ-KPU3)*

• Panel (optional parts) ** CZ-KPU3 series

ENGLISH Read through the Installation Instructions before you proceed with the installation. In particular, you will need to read under the “IMPORTANT!” section at the top of the page.

WEB-ACXF60-50850-00-EN

IMPORTANT! Please Read Before Starting
This air conditioner must be installed by the sales dealer or installer. This information is provided for use only by authorized persons.
For safe installation and trouble-free operation, you must:
· This Installation Instructions is for the indoor unit and
read the Installation Instructions of the outdoor unit as well.
· Carefully read this instruction booklet before beginning. · This air conditioner is required to have the remote
controller which is adaptable to nanoeTM X function.
· Follow each installation or repair step exactly as shown. · This air conditioner shall be installed in accordance with
National Wiring Regulations.
· That compliance with national gas regulations shall be
observed.
· The product meets the technical requirements of
EN/IEC 61000-3-3.

· Pay close attention to all warning and caution notices
given in this manual.

This symbol refers to a hazard or

WARNING

unsafe practice which can result in severe personal injury or death.

CAUTION

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

WARNING
· Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
· The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
· Do not pierce or burn. · Be aware that refrigerants may not contain an odour. · The following checks shall be applied to installations using flammable refrigerants.
Appliance shall be installed, operated and stored in a room with a floor area larger than [Amin] m2. As for [Amin], see Section “Check of Density Limit”.

SPECIAL PRECAUTIONS

WARNING When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.
· Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
· Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
· Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
· Provide a power outlet to be used exclusively for each unit. · Provide a power outlet exclusively for each unit, and full disconnection means having
a contact separation by 3 mm in all poles must be incorporated in the fixed wiring in accordance with the wiring rules. · To prevent possible hazards from insulation failure, the unit must be grounded.
3

· Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.
· This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown.
When Transporting
· It may need two or more people to carry out the installation work. · Be careful when picking up and moving the indoor and outdoor units. Get a partner to
help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.
When Storing…
WARNING · The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation. · The appliance shall be stored in a room without continuously operating open
flames (for example: an operating gas appliance) and ignition sources (for example: an operating electric heater). · The appliance shall be stored so as to prevent mechanical damage from occurring.
When Installing…
· Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.
· In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
· An unventilated area where the appliance using flammable refrigerants is installed shall be so constructed that should any refrigerant leak, it will not stagnate so as to create a fire or explosion hazard.
…In a Room Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.
CAUTION Keep the fire alarm and the air outlet at least 1.5 m away from the unit.
…In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration. …In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle. …In a Snowy Area (for Heat Pump-type Systems) Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents. …At Least 2.2 m Installation height for indoor unit shall be at least 2.2 m. …In Laundry Rooms Do not install in laundry rooms. Indoor unit is not drip proof.
When Connecting Refrigerant Tubing
Pay particular attention to refrigerant leakages.
4

WARNING
· When performing piping work, do not mix air except for specified refrigerant in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the refrigerant cycle.
· If the refrigerant comes in contact with a flame, it produces toxic gases and fires. · Do not add or replace refrigerant other than specified type. It may cause product
damage, burst and injury, etc. · Ventilate the room immediately in the event of a refrigerant gas leakage during
installation. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of toxic gases and fires. · Keep all tubing runs as short as possible. · 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. · Check carefully for leaks before starting the test run. · Do not leak refrigerant while piping work for an installation or re-installation, and while repairing refrigeration parts. Handle liquid refrigerant carefully as it may cause frostbite. · Under no circumstances shall potential sources of ignition be used in the searching or detection of refrigerant leaks. · A halide torch (or any other detector using a naked flame) shall not be used. · Electronic leak detectors may be used to detect refrigerant leaks but, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.) · Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. · Leak detection equipment shall be set at a percentage of the Lower Flammable Limit (LFL) of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed. · 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 pipe-work. · If a leak is suspected, all naked flames shall be removed/extinguished. · If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak. Oxygen Free Nitrogen (OFN) shall then be purged through the system both before and during the brazing process. · If refrigerant R32 is used and the optional “R32 refrigerant leakage detection sensor” is connected to the indoor unit, do not turn off the ELCB of the indoor unit except when there is a symptom of abnormality or failure, or when performing short-term maintenance. (When the ELCB is turned off, R32 refrigerant leakage detection sensor cannot detect the refrigerant leakage when the refrigerant leaks, and it may lead to cause the generation of toxic gases and fires.)
5

When Servicing
· Contact the sales dealer or service dealer for a repair. · Ventilate the room by opening windows before servicing if there is a possibility of a
refrigerant leakage. · Be sure to turn off the power before servicing. · Turn the power OFF at the main power box (mains), wait at least 5 minutes until it
is discharged, then open the unit to check or repair electrical parts and wiring. · Keep your fingers and clothing away from any moving parts. · Clean up the site after you finish, remembering to check that no metal scraps or bits of
wiring have been left inside the unit.
WARNING · This product must not be modified or disassembled under any circumstances.
Modified or disassembled unit may cause fire, electric shock or injury. · Do not clean inside the indoor and outdoor units by users. Engage authorized
dealer or specialist for cleaning. · In case of malfunction of this appliance, do not repair by yourself. Contact the
sales dealer or service dealer for a repair and disposal.
CAUTION · Ventilate any enclosed areas when installing or testing the refrigeration system.
Leaked refrigerant gas, on contact with fire or heat, can produce dangerously toxic gases. · Confirm after installation that no refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of toxic gases and fires. Others When disposing of the product, do follow the precautions referring to Section “Recovery” in the installation instructions supplied with the outdoor unit and comply with national regulations.
WARNING · Do not sit or step on the unit. You may fall down accidentally. CAUTION
· Do not touch the air inlet or the sharp aluminum fins of the outdoor unit. You may get injured.
· Do not stick any object into the FAN CASE. You may be injured and the unit may be damaged.
· Do not touch the fan because it automatically rotates when it detects a refrigerant leak. You may be injured.
6

SERVICING
CAUTION
· Any qualified person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry- accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognised assessment specification.
· Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.
· Servicing shall be performed only as recommended by the manufacturer. · Prior to beginning work on systems containing flammable refrigerants, safety
checks are necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating system, (2) to (6) shall be completed prior to conducting work on the system.
(1) Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the work is being performed.
(2) All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.
(3) The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
(4) If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.
(5) No person carrying out work in relation to a refrigerating system which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
(6) Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
(7) Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer’s technical department for assistance. · The actual refrigerant charge is in accordance with the room size within which the refrigerant containing parts are installed. · The ventilation machinery and outlets are operating adequately and are not obstructed.
7

· Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
· Refrigerating pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
(8) Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised. Initial safety checks shall include: · That capacitors are discharged. This shall be done in a safe manner to avoid possibility of sparking. · That no live electrical components and wiring are exposed while charging, recovering or purging the system. · That there is continuity of earth bonding.
· During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc.
· Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
· Ensure that apparatus is mounted securely. · Ensure that seals or sealing materials have not degraded such that they no longer
serve the purpose of preventing the ingress of flammable atmospheres. · Replacement parts shall be in accordance with the manufacturer’s specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.
· Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.
· Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.
· The test apparatus shall be at the correct rating. · Replace components only with parts specified by the manufacturer. Unspecified parts
by manufacturer may result ignition of refrigerant in the atmosphere from a leak.
8

REMOVAL AND EVACUATION
CAUTION
· When breaking into the refrigerant circuit to make repairs ­ or for any other purpose ­ conventional procedures shall be used. However, it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to: · Remove refrigerant. · Purge the circuit with inert gas. · Evacuate. · Purge again with inert gas. · Open the circuit by cutting or brazing.
· The refrigerant charge shall be recovered into the correct recovery cylinders. · The system shall be “flushed” with Oxygen Free Nitrogen (OFN) to render the unit safe. · This process may need to be repeated several times. · Compressed air or oxygen shall not be used for this task. · Flushing shall be achieved by breaking the vacuum in the system with OFN
and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. · This process shall be repeated until no refrigerant is within the system. · When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. · This operation is absolutely vital if brazing operations on the pipe work are to take place. · Ensure that the outlet for the vacuum pump is not close to any potential ignition sources and there is ventilation available.
CHARGING PROCEDURES
NOTE: Refer to the Installation Instructions attached to the outdoor unit.
DECOMMISSIONING
CAUTION
· Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details.
· It is recommended good practice that all refrigerants are recovered safely. · Prior to the task being carried out, an oil and refrigerant sample shall be taken in
case analysis is required prior to re-use of recovered refrigerant. · It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure ensure that:
· Mechanical handling equipment is available, if required, for handling refrigerant cylinders.
· All personal protective equipment is available and being used correctly. · The recovery process is supervised at all times by a competent person.
9

· Recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed
from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place. g) Start the recovery machine and operate in accordance with instructions. h) Do not overfill cylinders. (No more than 80% volume liquid charge). i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make
sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigerating system unless it has been cleaned and checked. · Electrostatic charge may accumulate and create a hazardous condition when charging or discharging the refrigerant. To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before charging / discharging. RECOVERY NOTE: Refer to the Installation Instructions attached to the outdoor unit.
NOTICE The English text is the original instructions. Other languages are translations of the original instructions.
10

Check of Density Limit
Check the amount of refrigerant in the system and floor space of the room according to the legislation on refrigerant drainage. If there is no applicable legislation, follow the standards described below.

The refrigerant (R32), which is used in the air conditioner, is a flammable refrigerant. So the requirements for the maximum refrigerant charge amount [mmax] used in the appliance are determined according to installation space of the appliance.

Installation conditions Procedure of preliminary calculation

1. Determine the room space in accordance with the requirements of installation.

2. Calculate the maximum refrigerant charge amount [mmax].

When connecting the refrigerant tubes and installing the

indoor unit in each partitioned room, it is necessary to calculate the allowable refrigerant charge amount in each

IN_1 IN_2

room.

For all indoor units shown in Fig. 1, calculate the

allowable refrigerant charge amount that can be used in Room_1 Room_2

each room [mIN_1, mIN_2,—, mIN_n].

Calculate the maximum refrigerant charge for each indoor

unit from Fig. 2 by referring to the following items.

– Floor area of the room

– Indoor units type

– Capacity of indoor unit

– Installation height of Indoor Unit

– Use or nonuse of R32 refrigerant leakage detection sensor

IN_3

IN_n

IN_n-1

Room_3 Room_m Fig. 1

Room No.

No. of indoor units

Room_1 Room_2 Room_3
–Room_m Room_m

IN_1 IN_2 IN_3
–IN_n-1 IN_n

Indoor units type
4-Way Cassette 60 × 60 Slim Low Static Ducted
4-Way Cassette —
Wall-Mounted 4-Way Cassette

Capacity of indoor
unit
15 56 56 –45 140

Installation height of Indoor Unit: hinst (m)

R32 refrigerant leakage detection
sensor

Floor area of the
room (m2)

Refrigerant charge amount that can be used for each indoor unit (kg)

hinst 2.2

Use

10

hinst 2.2

Nonuse

15

hinst 2.2

Use

20

—

—

—

hinst 1.8

Nonuse

30

hinst 2.2

Use

30

mIN_1 mIN_2 mIN_3
–mIN_n-1 mIN_n

[mmax] = Min (mIN_1, mIN_2, mIN_3, —, mIN_n-1, mIN_n)

The minimum value of the allowable refrigerant charge amount in each room is the maximum value of the maximum refrigerant charge amount [mmax] that can be used in the system.

3. Calculate the maximum refrigerant charge amount [mc] by following details of piping installation. As a reference, refer to Installation Instructions of outdoor unit.

4. Determine from two values [mmax] in Step 2 and [mc] in Step 3.
[mc] [mmax] : Can be installed. [mc] > [mmax] : Return to Steps 1 to 3 and change the indoor unit type, capacity and pipe
length.

11

The refrigerant charge amount compared with the floor area of the room is roughly as follows:

Type 22 Type 28 Type 36

Refrigerant charge amount (kg)

4-Way Cassette

Fig. 2

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 45

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 56

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

13

Type 60

Refrigerant charge amount (kg)

20.0 Use of R32 refrigerant leakage detection sensor
15.0 U-8LZ2E8, U-10LZ2E8

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 73 Type 90

Refrigerant charge amount (kg)

20.0 Use of R32 refrigerant leakage detection sensor
15.0 U-8LZ2E8, U-10LZ2E8

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 106 Type 112 Type 140 Type 160

Refrigerant charge amount (kg)

20.0 Use of R32 refrigerant leakage detection sensor
15.0 U-8LZ2E8, U-10LZ2E8

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

14

Floor area of the room (m2)

Use or nonuse of R32 refrigerant leakage detection sensor
Capacity of indoor unit

Nonuse 22 ~ 160

0

0.0

2

1.0

4

2.0

6

3.0

8

3.5

10

3.9

12

4.3

14

4.7

16

5.0

18

5.3

20

5.6

22

5.8

24

6.1

26

6.4

28

6.6

30

6.8

32

7.1

34

7.3

36

7.5

38

7.7

40

7.9

42

8.1

44

8.3

46

8.5

48

8.7

50

8.8

52

9.0

54

9.2

56

9.4

58

9.5

60

9.7

62

9.8

64 10.0

66 10.2

68 10.3

70 10.5

72 10.6

74 10.8

76 10.9

78

11.1

80

11.2

4-Way Cassette

Use

~ 36

45

56

60

Refrigerant charge amount (kg)

0.0

0.0

0.0

0.0

1.0

1.0

1.0

1.0

2.0

2.0

2.0

2.0

3.0

3.0

3.0

3.0

4.0

4.0

4.0

4.0

5.0

5.0

5.0

5.0

6.0

6.0

6.0

6.0

7.0

7.0

7.0

7.0

8.1

8.1

8.1

8.1

8.8

9.1

9.1

9.1

8.8

9.1

9.7

10.1

8.8

9.1

9.7

11.1

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

8.8

9.1

9.7

11.7

9.0

9.1

9.7

11.7

9.2

9.2

9.7

11.7

9.4

9.4

9.7

11.7

9.5

9.5

9.7

11.7

9.7

9.7

9.7

11.7

9.8

9.8

9.8

11.7

10.0

10.0

10.0

11.7

10.2

10.2

10.2

11.7

10.3

10.3

10.3

11.7

10.5

10.5

10.5

11.7

10.6

10.6

10.6

11.7

10.8

10.8

10.8

11.7

10.9

10.9

10.9

11.7

11.1

11.1

11.1

11.7

11.2

11.2

11.2

11.7

15

73, 90

106~

0.0

0.0

1.0

1.0

2.0

2.0

3.0

3.0

4.0

4.0

5.0

5.0

6.0

6.0

7.0

7.0

8.1

8.1

9.1

9.1

10.1

10.1

11.1

11.1

12.0 12.1 (12.0)

12.0 13.1 (12.0)

12.0 14.1 (12.0)

12.0 15.1 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

12.0 15.9 (12.0)

Floor area of the room (m2)

4-Way Cassette

Use or nonuse of R32

refrigerant leakage

Nonuse

Use

detection sensor

22 ~ 160

~ 36

Capacity of indoor unit

45

56

60

Refrigerant charge amount (kg)

73, 90

106~

82

11.3

11.3

11.3

11.3

11.7

12.0 15.9 (12.0)

84

11.5

11.5

11.5

11.5

11.7

12.0 15.9 (12.0)

86

11.6

11.6

11.6

11.6

11.7

12.0 15.9 (12.0)

88

11.7

11.7

11.7

11.7

11.7

12.0 15.9 (12.0)

90

11.9

11.9

11.9

11.9

11.9

12.0 15.9 (12.0)

92 12.0

12.0

12.0

12.0

12.0

12.0 15.9 (12.0)

94 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 15.9 (12.0)

96 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 15.9 (12.0)

98 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 15.9 (12.0)

100 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 15.9 (12.0)

( ) : U-4LZ2E5, U-5LZ2E5, U-6LZ2E5, U-4LZ2E8, U-5LZ2E8, U-6LZ2E8

16

The refrigerant charge amount compared with the floor area of the room is roughly as follows:

Type 22 Type 28 Type 36

Refrigerant charge amount (kg)

4-Way Cassette (3-way airflow)

Fig. 2

20.0 15.0 10.0
5.0 0.0
0

U-8LZ2E8, U-10LZ2E8
Use of R32 refrigerant leakage detection sensor
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 45

Refrigerant charge amount (kg)

20.0

U-8LZ2E8, U-10LZ2E8 15.0

10.0
5.0
0.0 0

Use of R32 refrigerant leakage detection sensor
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 56

Refrigerant charge amount (kg)

20.0

U-8LZ2E8, U-10LZ2E8 15.0

10.0
5.0
0.0 0

Use of R32 refrigerant leakage detection sensor
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

17

Type 60

Refrigerant charge amount (kg)

20.0

U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 73 Type 90

Refrigerant charge amount (kg)

20.0

U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

Type 106 Type 112 Type 140 Type 160

Refrigerant charge amount (kg)

20.0
Use of R32 refrigerant leakage detection sensor 15.0
U-8LZ2E8, U-10LZ2E8

10.0
5.0
0.0 0

U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Nonuse of R32 refrigerant leakage detection sensor
10 20 30 40 50 60 70 80 90 100 Floor area of the room (m2)

18

Floor area of the room (m2)

4-Way Cassette (3-way airflow)

Use or nonuse of R32 refrigerant leakage detection sensor

Nonuse

22 ~ 160

~ 36

Capacity of indoor unit

0

0.0

0.0

2

1.0

1.0

4

2.0

2.0

6

3.0

3.0

8

3.5

4.0

10

3.9

5.0

12

4.3

6.0

14

4.7

7.0

16

5.0

7.3

18

5.3

7.3

20

5.6

7.3

22

5.8

7.3

24

6.1

7.3

26

6.4

7.3

28

6.6

7.3

30

6.8

7.3

32

7.1

7.3

34

7.3

7.3

36

7.5

7.5

38

7.7

7.7

40

7.9

7.9

42

8.1

8.1

44

8.3

8.3

46

8.5

8.5

48

8.7

8.7

50

8.8

8.8

52

9.0

9.0

54

9.2

9.2

56

9.4

9.4

58

9.5

9.5

60

9.7

9.7

62

9.8

9.8

64

10.0

10.0

66

10.2

10.2

68

10.3

10.3

70

10.5

10.5

72

10.6

10.6

74

10.8

10.8

76

10.9

10.9

78

11.1

11.1

80

11.2

11.2

Use

45

56

60

Refrigerant charge amount (kg)

0.0

0.0

0.0

1.0

1.0

1.0

2.0

2.0

2.0

3.0

3.0

3.0

4.0

4.0

4.0

5.0

5.0

5.0

6.0

6.0

6.0

7.0

7.0

7.0

7.6

8.1

8.1

7.6

8.1

9.1

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.6

8.1

9.5

7.7

8.1

9.5

7.9

8.1

9.5

8.1

8.1

9.5

8.3

8.3

9.5

8.5

8.5

9.5

8.7

8.7

9.5

8.8

8.8

9.5

9.0

9.0

9.5

9.2

9.2

9.5

9.4

9.4

9.5

9.5

9.5

9.5

9.7

9.7

9.7

9.8

9.8

9.8

10.0

10.0

10.0

10.2

10.2

10.2

10.3

10.3

10.3

10.5

10.5

10.5

10.6

10.6

10.6

10.8

10.8

10.8

10.9

10.9

10.9

11.1

11.1

11.1

11.2

11.2

11.2

19

73, 90

106~

0.0

0.0

1.0

1.0

2.0

2.0

3.0

3.0

4.0

4.0

5.0

5.0

6.0

6.0

7.0

7.0

8.1

8.1

9.1

9.1

9.7

10.1

9.7

11.1

9.7

12.1 (12.0)

9.7

13.1 (12.0)

9.7

14.1 (12.0)

9.7

15.1 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.7

15.9 (12.0)

9.8

15.9 (12.0)

10.0 15.9 (12.0)

10.2 15.9 (12.0)

10.3 15.9 (12.0)

10.5 15.9 (12.0)

10.6 15.9 (12.0)

10.8 15.9 (12.0)

10.9 15.9 (12.0)

11.1 15.9 (12.0)

11.2 15.9 (12.0)

Floor area of the room (m2)

4-Way Cassette (3-way airflow)

Use or nonuse of R32

refrigerant leakage

Nonuse

Use

detection sensor

22 ~ 160

~ 36

Capacity of indoor unit

45

56

60

Refrigerant charge amount (kg)

73, 90

106~

82

11.3

11.3

11.3

11.3

11.3

11.3 15.9 (12.0)

84

11.5

11.5

11.5

11.5

11.5

11.5 15.9 (12.0)

86

11.6

11.6

11.6

11.6

11.6

11.6 15.9 (12.0)

88

11.7

11.7

11.7

11.7

11.7

11.7 15.9 (12.0)

90

11.9

11.9

11.9

11.9

11.9

11.9 15.9 (12.0)

92 12.0

12.0

12.0

12.0

12.0

12.0 15.9 (12.0)

94 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 15.9 (12.0)

96 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 15.9 (12.0)

98 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 15.9 (12.0)

100 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 15.9 (12.0)

( ) : U-4LZ2E5, U-5LZ2E5, U-6LZ2E5, U-4LZ2E8, U-5LZ2E8, U-6LZ2E8

20

The refrigerant charge amount compared with the floor area of the room is roughly as follows:

Type 22 Type 28 Type 36

Refrigerant charge amount (kg)

4-Way Cassette (2-way airflow)

Fig. 2

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor 10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

Nonuse of R32 refrigerant leakage detection sensor

0.0

0

10 20 30 40 50 60 70 80

Floor area of the room (m2)

90 100

Type 45

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor 10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

Nonuse of R32 refrigerant leakage detection sensor 0.0

0

10 20 30 40 50 60 70 80

Floor area of the room (m2)

90 100

Type 56

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor 10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

Nonuse of R32 refrigerant leakage detection sensor 0.0

0

10 20 30 40 50 60 70 80

Floor area of the room (m2)

90 100

21

Type 60

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor 10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

0.0 0

Nonuse of R32 refrigerant leakage detection sensor 10 20 30 40 50 60 70 80
Floor area of the room (m2)

90 100

Type 73 Type 90

Refrigerant charge amount (kg)

20.0
U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor 10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

0.0 0

Nonuse of R32 refrigerant leakage detection sensor 10 20 30 40 50 60 70 80
Floor area of the room (m2)

90 100

Type 106 Type 112 Type 140 Type 160

Refrigerant charge amount (kg)

20.0

U-8LZ2E8, U-10LZ2E8 15.0
Use of R32 refrigerant leakage detection sensor

10.0
U-4LZ2E5, U-5LZ2E5, U-6LZ2E5 U-4LZ2E8, U-5LZ2E8, U-6LZ2E8 5.0

0.0 0

Nonuse of R32 refrigerant leakage detection sensor 10 20 30 40 50 60 70 80
Floor area of the room (m2)

90 100

22

Floor area of the room (m2)

4-Way Cassette (2-way airflow)

Use or nonuse of R32 refrigerant leakage detection sensor

Nonuse

22 ~ 160

~ 36

Capacity of indoor unit

0

0.0

0.0

2

1.0

1.0

4

2.0

2.0

6

3.0

3.0

8

3.5

4.0

10

3.9

5.0

12

4.3

5.1

14

4.7

5.1

16

5.0

5.1

18

5.3

5.3

20

5.6

5.6

22

5.8

5.8

24

6.1

6.1

26

6.4

6.4

28

6.6

6.6

30

6.8

6.8

32

7.1

7.1

34

7.3

7.3

36

7.5

7.5

38

7.7

7.7

40

7.9

7.9

42

8.1

8.1

44

8.3

8.3

46

8.5

8.5

48

8.7

8.7

50

8.8

8.8

52

9.0

9.0

54

9.2

9.2

56

9.4

9.4

58

9.5

9.5

60

9.7

9.7

62

9.8

9.8

64 10.0

10.0

66 10.2

10.2

68 10.3

10.3

70 10.5

10.5

72 10.6

10.6

74 10.8

10.8

76 10.9

10.9

78

11.1

11.1

80

11.2

11.2

Use

45

56

60

Refrigerant charge amount (kg)

0.0

0.0

0.0

1.0

1.0

1.0

2.0

2.0

2.0

3.0

3.0

3.0

4.0

4.0

4.0

5.0

5.0

5.0

5.2

5.6

6.0

5.2

5.6

6.6

5.2

5.6

6.6

5.3

5.6

6.6

5.6

5.6

6.6

5.8

5.8

6.6

6.1

6.1

6.6

6.4

6.4

6.6

6.6

6.6

6.6

6.8

6.8

6.8

7.1

7.1

7.1

7.3

7.3

7.3

7.5

7.5

7.5

7.7

7.7

7.7

7.9

7.9

7.9

8.1

8.1

8.1

8.3

8.3

8.3

8.5

8.5

8.5

8.7

8.7

8.7

8.8

8.8

8.8

9.0

9.0

9.0

9.2

9.2

9.2

9.4

9.4

9.4

9.5

9.5

9.5

9.7

9.7

9.7

9.8

9.8

9.8

10.0

10.0

10.0

10.2

10.2

10.2

10.3

10.3

10.3

10.5

10.5

10.5

10.6

10.6

10.6

10.8

10.8

10.8

10.9

10.9

10.9

11.1

11.1

11.1

11.2

11.2

11.2

23

73, 90
0.0 1.0 2.0 3.0 4.0 5.0 6.0 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.8 7.1 7.3 7.5 7.7 7.9 8.1 8.3 8.5 8.7 8.8 9.0 9.2 9.4 9.5 9.7 9.8 10.0 10.2 10.3 10.5 10.6 10.8 10.9 11.1 11.2

106~
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.1 9.1 10.1 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.1 11.2

Floor area of the room (m2)

4-Way Cassette (2-way airflow)

Use or nonuse of R32

refrigerant leakage

Nonuse

Use

detection sensor

22 ~ 160

~ 36

Capacity of indoor unit

45

56

60

Refrigerant charge amount (kg)

73, 90

106~

82

11.3

11.3

11.3

11.3

11.3

11.3

11.3

84

11.5

11.5

11.5

11.5

11.5

11.5

11.5

86

11.6

11.6

11.6

11.6

11.6

11.6

11.6

88

11.7

11.7

11.7

11.7

11.7

11.7

11.7

90

11.9

11.9

11.9

11.9

11.9

11.9

11.9

92 12.0

12.0

12.0

12.0

12.0

12.0

12.0

94 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0) 12.1 (12.0)

96 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0) 12.3 (12.0)

98 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0) 12.4 (12.0)

100 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0) 12.5 (12.0)

( ) : U-4LZ2E5, U-5LZ2E5, U-6LZ2E5, U-4LZ2E8, U-5LZ2E8, U-6LZ2E8

GENERAL

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning. The installation of pipe-work shall be kept to a minimum.
This symbol shows that this equipment uses a flammable refrigerant. If the WARNING refrigerant is leaked, together with an external ignition source, there is a
possibility of ignition.
CAUTION This symbol shows type of flammable refrigerant contained in the system.

CAUTION This symbol shows that the Operating Instructions should be read carefully.

CAUTION CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the Technical Manual.
This symbol shows that there is information included in the Operating Instructions and/or Installation Instructions.

1-1. Tools Required for Installation (not supplied)
1. Flathead screwdriver 2. Phillips head screwdriver 3. Knife or wire stripper 4. Tape measure 5. Carpenter’s level 6. Sabre saw or keyhole saw 7. Hacksaw 8. Core bits 9. Hammer 10. Drill 11. Tube cutter 12. Tube flaring tool 13. Torque wrench 14. Adjustable wrench 15. Reamer (for deburring)

1-2. Accessories Supplied with Unit

Part Name
Full-scale installation diagram

Figure

Q’ty

Remarks

1

Printed on container box

Washer
Screw Insulating tape

8

For suspension bolts

For full-scale 4 installation
diagram

2

For gas and liquid tube flare nuts

Flare insulator

1 For liquid tube

Flare insulator

1 For gas tube

Drain hose Hose band Packing

1

1

For securing drain hose

1

Drain insulator
Clamper
Operating Instructions Installation Instructions 25

1

4

For electrical wiring

1

1

As for S-60MU2E5BN, S-73MU2E5BN or S-90MU2E5BN, the following accessories are additionally provided.

Part Name

Figure

Q’ty

Remarks

Differentdiameter-tube joint
Insulating tape

1

Gas socket tube A : ø15.88 ø12.7

1

Liquid socket tube B : ø9.52 ø6.35

2

For gas and liquid tube flare nuts

Use M10 for suspension bolts.
Field supply for suspension bolts and nuts.
Take all supplied accessories out of the plastic bag.
If the protection tape for the fan remains, peel off the tape.

Accessories Supplied

Protection tape for the fan

1-3. Type of Copper Tube and Insulation Material
If you wish to purchase these materials separately from a local source, you will need: 1. Deoxidized annealed copper tube for refrigerant tubing. 2. Foamed polyethylene insulation for copper tubes as required to precise length of tubing.
Wall thickness of the insulation should be not less than 8 mm. 3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. See
Section “4. ELECTRICAL WIRING” for details.
CAUTION
Check local electrical codes and regulations before obtaining wire. Also, check any specified instructions or limitations.
1-4. Additional Materials Required for Installation
1. Refrigeration (armored) tape 2. Insulated staples or clamps for connecting wire (See your local codes.) 3. Putty 4. Refrigeration tubing lubricant 5. Clamps or saddles to secure refrigerant tubing 6. Scale for weighing

26

2. SELECTING THE INSTALLATION SITE
2-1. Indoor Unit
AVOID: areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. direct sunlight. locations near heat sources which may affect the performance of the unit. locations where external air may enter the room directly. This may cause “condensation” on
the air discharge ports, causing them to spray or drip water. locations where the remote controller will be splashed with water or affected by dampness or
humidity. installing the remote controller behind curtains or furniture. locations where high-frequency emissions are generated.
DO: select an appropriate position from which every corner of the room can be uniformly cooled. select a location where the ceiling is strong enough to support the weight of the unit. select a location where tubing and drain pipe have the shortest run to the outdoor unit. allow room for operation and maintenance as well as unrestricted airflow around the unit. Set up the airflow increase in case of the following conditions.
Ceiling heights are: 2.7 m (Type 22-56) 3.0 m (Type 60-90) 3.6 m (Type 106-160)
If the floor-to-ceiling is high, the wind speed distribution will become poor. For the setting method, see Section “7-3. Others”. the limitation of the tubing length between the indoor and the outdoor units should be referred to the Installation Instructions of the outdoor unit. allow room for mounting the remote controller about 1 m off the floor, in an area that is not in direct sunlight or in the flow of cool air from the indoor unit.

4-Way Cassette Type

Indoor unit

Wall min. 1 m Over 2.2 m

1 m 1 m

1 m 1 m

min. 1 m

Ceiling

min. 3 m Obstacles

27

Installation location of R32 refrigerant leakage detection sensor When installing R32 refrigerant leakage detection sensor away from the indoor unit, place it at 300 mm or less from a floor surface and satisfy the condition either (1) or (2) below. (1) If no obstacles exist in a straight line from R32 refrigerant leakage detection sensor to the
indoor unit, wall distance should be within 10 m in horizontal straight line.
A : Top View

A

10 m or less

R32 refrigerant leakage detection sensor

Indoor unit

Indoor unit

B : Front View

10 m or less

Indoor unit

B

R32 refrigerant leakage detection sensor

300 mm or less

R32 refrigerant leakage detection sensor

(2) If obstacles exist in a straight line from R32 refrigerant leakage detection sensor to the indoor unit, wall distance should be within 7 m in horizontal straight line.

A : Top View

Obstacles

A

7 m or less

R32 refrigerant leakage detection sensor

Indoor unit

Indoor unit

B : Front View

7 m or less

Indoor unit

B Obstacles
R32 refrigerant leakage detection sensor

Obstacles 300 mm or less

R32 refrigerant leakage detection sensor

28

3. HOW TO INSTALL THE INDOOR UNIT
Note: For DC Fan Tap Change Procedure for 4-Way Cassette, see Section “7-3. Others”.

3-1. Preparation for Suspending
This unit uses a drain pump. Use a carpenter’s level to check that the unit is level.

3-2. Suspending the Indoor Unit
(1) Fix the suspension bolts securely in the ceiling using the method shown in the diagrams, by attaching them to the ceiling support structure, or by any other method that ensures that the unit will be securely and safely suspended.
(2) Follow the diagram to make the holes in the ceiling.

Hole-in-anchor Hole-in-plug

Concrete

Insert

Suspension bolt (M10 or 3/8″) (field supply)

Indoor Unit View from top

A: 700 mm B: 860 ~ 910 mm

A: 780 mm B: 860 ~ 910 mm

A: (suspension bolt pitch) B: (ceiling opening dimension)

(3) Determine the pitch of the suspension bolts using the supplied full-scale installation diagram (printed on container box). The diagram show the relationship between the positions of the suspension fitting, unit, and panel. Use the nut (field supply) and washer (supplied) for upper and lower position of the suspension lug.

Drain outlet (other side) (VP25)

Refrigerant tubing joint (gas side)

Suspension lug

Refrigerant tubing joint (liquid side) 840 mm

127 mm 177 mm
Type 22 ~ 90: 256 mm Type 106 ~ 160: 319 mm

184 mm 134 mm

33.5 mm

340 mm

272 mm

• Over 20 mm

• Over 20 mm

950 mm

50 mm

• The overlapping portion between the ceiling and panel for cassette should be kept over 20 mm.

29

3-3. Placing the Unit Inside the Ceiling
This unit is equipped with a drain pump. Check with a tape measure or carpenter’s level. Before installing the panel for cassette, complete the work of drain pipe and refrigerant tube installation.
(1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts using the supplied full-scale installation diagram. Tubing and wiring must be laid inside the ceiling when suspending the unit. If the ceiling is already constructed, lay the tubing and wiring into position for connection to the unit before placing the unit inside the ceiling.
(2) The length of suspension bolts must be appropriate for a distance between the bottom of the bolt and the bottom of the unit of more than 18 mm.

Over 18 mm 12 ~ 17 mm

Indoor unit

Indoor unit

Ceiling board

Ceiling board

Screw for attaching paper (4 points)

Open the ceiling board as large as this paper outline

Full-scale installation diagram (printed on top of container box)
(3) Thread the 3 hexagonal nuts and 2 washers onto each of the 4 suspension bolts. Use 1 nut and 1 washer for the upper side, and 2 nuts and 1 washer for the lower side, so that the unit will not fall off the suspension lugs.

Suspension bolt

Nuts and washers (use for upper and lower)

Suspension lug

Double nut

Notch 12 ~ 17 mm

(4) Adjust so that the distance between the unit and the ceiling bottom is 12 to 17 mm. Tighten the nuts on the upper side and lower side of the suspension lug.
(5) If the protection tape for the fan during transportation remains, peel off the tape. (See Section “1-2. Accessories Supplied with Unit”.)
(6) Check with a tape measure or carpenter’s level.

3-4. How to Process Tubing
See Section “5. HOW TO PROCESS TUBING”.

30

3-5. Installing the Drain Pipe
3-5-1. Before Performing the Installation of Drain Piping

(1) Limitations of Raising the Drain Pipe Connection

CAUTION

The drain pipe can be raised to a maximum height of 850 mm from the bottom of the ceiling. Do not attempt to raise it higher than 850 mm. Doing so will result in water leakage.

300 mm or less (as short as possible)

A B

A : 850 mm or lower B : 666 mm or lower

Indoor unit Bottom of the Ceiling board * Length of supplied drain pipe = 250 mm
(2) Limitations of Drain Pipe Connection

CAUTION
Do not install the drain pipe with an upward gradient from the drain port connection. This will cause the drain water to flow backward and leak when the unit is not operating.
Do not install an air bleeder as this may cause water to spray from the drain pipe outlet. Do not provide U-trap or bell-shaped trap in the middle of the drain pipe. Doing so will cause
abnormal sound.

Air bleeder prohibited Upward gradient prohibited

Trap prohibited

Indoor unit

Make sure the drain pipe has a downward gradient (1/100 or more; downward from drain port connection).
Separation of support bracket = 1.5 m ~ 2 m

Indoor unit
Downward gradient = 1/100 or more
If there is a centralized drain pipe, be careful to the size of pipe.

31

(3) Limitations of Drain Hose Connection
CAUTION
Do not bend the supplied drain hose 90° or more. Bend it less than 45°.
Bend angle 90° prohibited

Bend angle less than 45°

Do not make a trap in the middle of the supplied drain hose. Doing so will cause abnormal sound.
Trap prohibited

32

3-5-2. Installing the Drain Pipe
CAUTION
Do not apply force to the drain port when connecting the drain pipe. Install and fix it near the indoor unit as close as possible.
Do not use adhesive when connecting the drain port pipe and the drain hose.
(1) How to Install the Drain Pipe

1. First insert the supplied hose band into the drain port pipe. Then make sure the head of the screw is facing toward a technical engineer when placing the screw of the hose band at an upward angle.
2. Insert the soft PVC socket of the supplied drain hose to the drain port pipe. Do not use adhesive when connecting the drain hose to the drain port pipe. Insert it until the tip of the drain hose contacts the uneven surface of the drain port pipe.
3. Move the hose band so that the center position of the hose band can be placed approx. 30 mm away from the external plate of the indoor unit. See diagram below.
4. Screw the drain hose tightly facing the screw of the hose band upward. (Torque: 2.5 N·m 3.4 N·m) (If the screw is tightened beneath the drain hose, the troubles will be generated.)
5. Apply approx. 2 g of adhesive on both sides of the drain hose without connection of the hard PVC socket and the hard PVC pipe joint (VP25) in the field supply.
6. Connect the drain hose and the hard PVC pipe joint so that the adhesive area of both sides can be overlapped. Wipe off the protrusion-adhesive with a soft cloth.

Drain port

Hose band (supplied)

(Drainage check section on drain port, transparent)

Soft PVC socket

Hard PVC pipe joint (VP25 field supplied)

Hard PVC socket

Uneven surface Indoor unit

Drain hose (supplied)

• Apply approx. 2 g of adhesive on both sides of supplied the drain hose and the hard PVC pipe joint (VP25) in the field

supply. Wipe off the protrusion-adhesive

• Drain port may possibly

with a soft cloth.

be damaged and cause

the water leakage if PVC adhesive is used.

Adhere with PVC adhesive.

Do not use adhesive here.

Fasten the hose band as shown the diagram below. (Torque: 2.5 N·m – 3.4 N·m)

Indoor unit

Uneven surface 5 mm

Packing (supplied)

57 mm 20 mm or more
Note: Be sure to tightly insert the hard PVC pipe joint (including elbow) minimum 20 mm or more. * However, do not use the hard PVC pipe joint
allowable more than 55 mm insertion.
Drain insulator (supplied)

• After checking the drainage, wrap the supplied packing and drain pipe insulator around the pipe.

33

3-5-3. Checking the Drainage CAUTION Be careful since the fan will start when you short the pin on the indoor unit control PCB.
After wiring (see Section “4. ELECTRICAL WIRING”.) and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water. (1) Connect power to the power terminal board (L, N terminals) inside the electrical component
box. (2) Slowly pour about 1 L of water into the drain pan to check drainage.
Drainage check
Over 100 mm
Drain pan outlet Plastic container for water intake Water (Approx. 1 L)
(3) Short the check pin (CHK) (6P : 5-6) on the indoor unit control PCB and operate the drain pump. Check the water flow through the transparent drain pipe and see if there is any leakage. * If the check pin (CHK) (6P : 5-6) is shorted, the fan starts rotating at high speed and could cause injury.
(4) When the check of drainage is complete, open the check pin (CHK) (6P : 5-6) and remount the tube cover.
(5) Checkpoint after installation After installation of indoor and outdoor units, panels and electrical wiring, check Section “10. CHECKLIST AFTER INSTALLATION WORK”.
3-6. Important Note for Wiring 4-Way Cassette Type
Power supply inlet
(1) The power supply inlet is located at the lower area of the refrigerant tubing side of the unit. The electrical component box is located at the air intake of the bottom of the unit.
(2) Before installing the panel for cassette, be sure to carry out the wiring connection.
34

(3) Remove the lid located on the bottom of the indoor unit attaching the electrical component box by unscrewing the Phillips head tapping screws (×2).
Tapping screw position
(4) Lead the wires from the power supply inlet to the unit. Be sure to lead the wires through the power supply inlet. Make sure that no wire is caught between the indoor unit and panel for cassette. Otherwise, the unit may cause a fire.
(5) Connect the wires into the terminals through the power supply inlet for the electrical component box. Fix the wires with a clamping clip.
(6) Reinstall the lid of the electrical component box in its original position with paying attention not to have the wires caught in the lid. See Section “4. ELECTRICAL WIRING”.
35

4. ELECTRICAL WIRING
4-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following the wiring diagram under Section 4-3. WARNING (2) This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown. The ELCB must be incorporated in the fixed wiring in accordance with the wiring regulations. The ELCB must be an approved circuit capacity, having a contact separation in all poles. The ELCB or RCD suitable for use with inverters, resistant to high frequency noise, is most suitable. The ELCB’s or RCD’s intended for protection to include high frequency currents are unnecessary and should be avoided, as potentially causing nuisance tripping, in this application. (3) To prevent possible hazards from insulation failure, the unit must be grounded.
(4) Each wiring connection must be done in accordance with the wiring system diagram. Wrong wiring may cause the unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.
(6) 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.
(7) Regulations on wire diameters differ from locality to locality. For field wiring rules, please refer to your LOCAL ELECTRICAL CODES before beginning. You must ensure that installation complies with all relevant rules and regulations.
(8) 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. CAUTION
Check local electrical codes and regulations before wiring. Also, check any specified instruction or limitations.
36

4-2. Wire Length and Wire Diameter for Power Supply System

Indoor unit
Type U2

(B) Power supply cable Min. 2.5 mm2 1 Max. 130 m 2

Time delay fuse or circuit capacity 15 A

Control wiring
(C) Inter-unit (between outdoor and indoor units) control wiring Min. 0.75 mm2 Use shielded wiring *3 Max. 1,000 m

(D) Remote control wiring Min. 0.75 mm2 Max. 500 m

(E) Remote control wiring for group control
Min. 0.75 mm2
Max. 200 m (Total)

NOTE
1 Maximum applicable wire for terminal board of indoor unit : 4 mm2 2 Maximum length shows a 2% voltage drop. *3 With ring-type wire terminal

37

4-3. Wiring System Diagrams

Power supply

L

220-230-240V~ 50-60Hz N

Ground Remote controller
1 2

Indoor unit (No. 1)
L N

B

U1

U2

D

R1 R2

Power supply

L

220-230-240V~ 50-60Hz N

Ground
Remote controller
1 2

Indoor unit (No. 2)
L N

B

U1

U2

D

R1 R2

Power supply

L

220-230-240V~ 50-60Hz N

Ground

Indoor unit (No. 3)
L N

B

U1

U2

E*

R1 R2

C C
C C

ex.)

Outdoor unit : U-4LZ2E5, U-5LZ2E5, U-6LZ2E5

L N

L Power supply N 220-230-240V~ 50Hz

U1

Ground

U2

ex.) Outdoor unit : U-4LZ2E8, U-5LZ2E8, U-6LZ2E8

L1 L2 L3 N

L1 Power supply

L2 L3

380-400-415V 3N~ 50Hz

N

U1

Ground

U2

( : Functional earthing)

4P terminal board

2P terminal board

Power supply

L

220-230-240V~ 50-60Hz N

Ground Remote controller
1 2

Indoor unit (No. n)
L N

B

U1

U2

D

R1 R2

R32 refrigerant leakage

D

detection sensor

1

2

U1 U2
Inter-unit control wiring

R1 R2
Remote control wiring

Type U2

L

N

Power supply cable

NOTE
(1) See Section 4-2 for the explanation of “B”, “C”, “D” and “E” under Section 4-3.
(2) The basic connection diagram of the indoor unit shows the terminal boards, so the terminal boards in your equipment may differ from the diagram.
(3) Refrigerant Circuit address should be set before turning the power on.
(4) Regarding Refrigerant Circuit address setting, refer to the installation instructions supplied with the remote controller (Optional). Auto address setting can be executed by remote controller automatically.
(5) In the case of connecting R32 refrigerant leakage detection sensor :
· Be sure to make wirings through the ceiling or the walls so that the wires of R32 refrigerant leakage detection sensor cannot be visible from inside the room.
· A single R32 refrigerant leakage detection sensor cannot be connected to multiple indoor units.

• Group connection “E” with a remote controller is not possible. Be sure to connect a remote controller to each indoor unit.

38

CAUTION

(1) When linking the outdoor units in a network, disconnect the terminal extended from the short plug from all outdoor units except any one of the outdoor units. (When shipping: In shorted condition.) For a system without link (no wiring connection between outdoor units), do not remove the short plug.
(2) Do not install the inter-unit control wiring in a way that forms a loop.

Outdoor unit

Outdoor unit

Outdoor unit Prohibited

Prohibited

Indoor unit

Indoor unit

Indoor unit

Indoor unit

Indoor unit

(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.

Outdoor unit

Indoor unit

Indoor unit

NO

Indoor unit

Indoor unit Branch point

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

Central Controller

Outdoor unit

: Branch point

Outdoor unit

Indoor unit

Indoor unit

Indoor unit

More than 2m required

Outdoor unit

Indoor unit

Indoor unit

Indoor unit

Indoor unit

Indoor unit

Indoor unit

(5) Use shielded wires for inter-unit control wiring

Shielded wire

(C) and ground the shield on both sides,

otherwise misoperation from noise may occur.

Connect wiring as shown in Section 4-3.

(Functional earthing)

(Functional earthing)

(6) Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F

which conform to CENELEC (HAR) rating specifications) or use the cables based on

IEC standard. (60245 IEC57, 60245 IEC66)

39

WARNING
Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also occur. Therefore, ensure that all wiring is tightly connected. When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the terminal screw.

How to connect wiring to the terminal

For stranded wiring
(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. Then attach the ring pressure terminal.
(2) Using a Phillips head screwdriver, remove the terminal screw(s) on the terminal board.
(3) Using a ring connector fastener or pliers, securely clamp each stripped wire end with a ring pressure terminal.
(4) Place the ring pressure terminal, and replace and tighten the removed terminal screw using a screwdriver.

Special washer
Wire

Strip 10 mm

Stranded wire
Screw Ring pressure terminal Terminal board

Ring pressure terminal
Screw and Special washer
Ring pressure terminal Wire

Examples of shield wires (1) Remove cable coat 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 insulating tape around them.
(3) Remove coat of signal wire.
(4) Attach ring pressure terminals to the signal wires and the shield wires insulated in Step (2).

Insulating tape Shield mesh 8 mm
Insulating tape Shield mesh

40

Wiring samples

Functional ground screw (External Electronic Expansion Valve Kit and Schedule Timer)

R32 refrigerant leakage detection sensor wiring

Protective ground screw (External Solenoid Valve Kit for 3WAY)

Remote control wiring
Inter-unit control wiring
Use this screw when connecting the shield for the Inter-unit control wiring to ground. ( : Functional earthing)

Protective ground screw
Earth wiring: Make the earth wiring 25 – 30 mm longer than power cable.
Power cable Power supply cable

Clamping Clip
Clamper1 (supplied) 1 Fasten tightly.

Clamper*1 (supplied)

41

5. HOW TO PROCESS TUBING
Must ensure mechanical connections be accessible for maintenance purposes. When connecting the tube size ø19.05 with the system using refrigerant R32, be sure to connect by brazing.

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method
Many of conventional split system air conditioners employ the flaring method to connect refrigerant tubes that run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts.

Flaring Procedure with a Flare Tool (1) Cut the copper tube to the required length with a tube cutter.
It is recommended to cut approx. 30 ­ 50 cm longer than the tubing length you estimate. (2) Remove burrs at each end of the copper tubing with a tube reamer or a similar tool. This process is important and should be done carefully to make a good flare. Be sure to keep any contaminants (moisture, dirt, metal filings, etc.) from entering the tubing.
NOTE
When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube.
(3) Remove the flare nut from the unit and be sure to mount it on the copper tube.
(4) Make a flare at the end of the copper tube with a flare tool.

Deburring

Before

After

Copper tubing Reamer
Flare nut
Copper Flare tool tubing

NOTE
When flared joints are reused, the flare part shall be re-fabricated. A good flare should have the following characteristics: inside surface is glossy and smooth edge is smooth tapered sides are of uniform length
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust or water from entering the tubes before they are used.
(2) Use a small amount of ether oil (PVE only) to apply refrigerant lubricant to the inside of the flare nut when making a flare connection. Pay careful attention to prevent the ether oil (PVE only) from directly attaching the screw and resin parts. This is effective for reducing gas leaks.
(3) For proper connection, align the union tube and flare tube straight with each other, then screw on the flare nut lightly at first to obtain a smooth match.
Adjust the shape of the liquid tube using a tube bender at the installation site and connect it to the liquid tubing side valve using a flare.

Apply a small amount of ether oil (PVE only) to the inside of the flare nut.
Union Flare nut

42

Cautions During Brazing
Replace air inside the tube with nitrogen gas to prevent copper oxide film from forming during the brazing process. (Oxygen, carbon dioxide and Freon are not acceptable.)
Do not allow the tubing to get too hot during brazing. The nitrogen gas inside the tubing may overheat, causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing.
Use a reducing valve for the nitrogen cylinder.
Do not use agents intended to prevent the formation of oxide film. These agents adversely affect the refrigerant and refrigerant oil, and may cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and Outdoor Units

NOTE

When connecting to the mini VRF 8HP, 10HP (outdoor units type LE1 only), select the main tube by using the following values. For details, refer to the installation instructions of the outdoor

unit.

Indoor unit Type U2

22 28 36 45 56 60 73 90 106 112 140 160

0.180

0.203

0.288

(1) Tightly connect the indoor-side refrigerant tubing extended from the wall with the outdoor-side tubing.

Indoor Unit Tubing Connection

For R410A

Unit : mm

Indoor unit type 22 28 36 45 56 60 73 90 106 112 140 160

Gas tube

ø12.7

ø15.88

Liquid tube

ø6.35

ø9.52

For R32
Indoor unit type Gas tube Liquid tube

Unit : mm

22 28 36 45 56 60 73 90 106 112 140 160

ø12.7

ø15.88

ø6.35

ø9.52

(2) To fasten the flare nuts, apply specified torque.
When removing the flare nuts from the tubing connections, or when tightening them after connecting the tubing, be sure to use two spanners. When tightening the flare nuts, use a torque wrench. If the flare nuts are over-tightened, the flare may be damaged, which could result in refrigerant leakage and cause injury or asphyxiation to room occupants.
For the flare nuts at tubing connections, be sure to use the flare nuts that were supplied with the unit, or else flare nuts for R410A, R32 (type 2). The refrigerant tubing that is used must be of the correct wall thickness as shown in the following table.
Because the pressure is approximately 1.6 times higher than conventional refrigerant R22 pressure, the use of ordinary flare nuts (type 1) or thin- walled tubes may result in tube rupture, injury, or asphyxiation caused by refrigerant leakage.
In order to prevent damage to the flare caused by over-tightening of the flare nuts, use the following table as a guide when tightening.

43

Tube diameter

Tightening torque (approximate)

Tube thickness

ø6.35 (1/4″) ø9.52 (3/8″) ø12.7 (1/2″) ø15.88 (5/8″) ø19.05 (6/8″)*

14 ­ 18 N · m {140 ­ 180 kgf · cm}
34 ­ 42 N · m {340 ­ 420 kgf · cm}
49 ­ 61 N · m {490 ­ 610 kgf · cm}
68 ­ 82 N · m {680 ­ 820 kgf · cm}
100 ­ 120 N · m {1,000 ­ 1,200 kgf · cm}

0.8 mm 0.8 mm 0.8 mm 1.0 mm 1.0 mm

• When connecting the tube size ø19.05 with the system using refrigerant R32, be sure to connect by brazing.

When tightening the flare nut on the liquid tube, use an adjustable wrench with a nominal handle length of 200 mm.

5-3. Insulating the Refrigerant Tubing

Tubing Insulation

Must ensure that pipe-work shall be protected from physical damage.

Thermal insulation must be applied to all units tubing, including distribution joint (field supply).

Two tubes arranged together

• For gas tubing, the insulation material must be heat resistant to 120°C or above. For other tubing, it must be heat resistant to 80°C or above.

Liquid tube Insulation

Gas tube

Insulation material thickness must be 10 mm or greater.

If the conditions inside the ceiling exceed DB 30°C and RH 70%, increase the thickness of the gas tubing insulation material by 1 step.

CAUTION If the exterior of the outdoor unit valves has been finished with a square duct covering, make sure you allow sufficient space to access the valves and to allow the panels to be attached and removed.
Additional Precautions For R32 Models
Ensure to do the re-flaring of pipes before connecting to units to avoid leaking.
To prevent the ingress of moisture into the joint which could have the potential to freeze and then cause leakage, the joint must be sealed with suitable silicone and insulation material. The joint should be sealed on both liquid and gas side.
Insulation material and silicone sealant. Please ensure there are no gaps where moisture can enter the joint.

Silicone Sealant must be neutral cure and ammonia free. Use of silicone containing ammonia can lead to stress corrosion on the joint and cause leakage.
Taping the flare nuts Wind the insulating tape around the flare nuts at the gas / liquid tube connections. Then cover up the tubing connections with the flare insulator (supplied). Wrap with the flare insulator facing its seam upward.

44

Flare insulator (supplied)

Insulating tape (supplied)

Different-diameter-tube joint

Insulating tape (supplied)

Unit side

Flare union

Flare nut

Tube insulator (not supplied) Heat resistant 120°C or above

• Illustration shows when using by S-60MU2E5BN, S-73MU2E5BN or S-90MU2E5BN. (Only LZ2 series)

Insulation material
The material used for insulation must have good insulation characteristics, be easy to use, be age resistant, and must not easily absorb moisture.

NOTE
If noise bothers you from the area between indoor and outdoor units’ connection pipes, it is effective to wind the soundproofing materials (field supply) to reduce noise.

CAUTION
After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack. Never grasp the drain or refrigerant connecting outlets when moving the unit.

5-4. Taping the Tubes

(1) At this time, the refrigerant tubes (and electrical wiring if local codes permit) should be taped together with armoring tape in 1 bundle. To prevent condensation from overflowing the drain pan, keep the drain hose separate from the refrigerant tubing.

Clamp Insulated tubes Drain hose

(2) Wrap the armoring tape from the bottom of the outdoor unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous tape turn.

(3) Clamp the tubing bundle to the wall, using 1 clamp approx. each meter.

(4) Limited to Oceania only : Interconnecting refrigerant pipework, i.e. pipework external to the unitary components, should be marked with a Class label (see right figure) every two metres where the pipework is visible. Label size is 50 mm × 50 mm. This includes pipework located in a ceiling space or any void which a person may access for maintenance or repair work within that space.

NOTE
Do not wind the armoring tape too tightly since this will decrease the heat insulation effect. Also ensure that the condensation drain hose splits away from the bundle and drips clear of the unit and the tubing.

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5-5. Finishing the Installation
After finishing insulating and taping over the tubing, use sealing putty to seal off the hole in the wall to prevent rain and draft from entering.

Apply putty here

Tubing
6. HOW TO INSTALL THE TIMER REMOTE CONTROLLER OR HIGH-SPEC WIRED REMOTE CONTROLLER (OPTIONAL PART)
NOTE
Refer to the Installation Instructions attached to the optional Timer Remote Controller or optional High-spec Wired Remote Controller.

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7. HOW TO INSTALL THE PANEL FOR CASSETTE

Accessories

Panel for cassette ×1

Screws ×4

4 × 12

7-1. Preparation for Panel for Cassette Installation
(1) Checking the unit position 1) Check that the ceiling hole is within this range: 860 mm × 860 mm to 910 mm × 910 mm
2) Confirm that the position of the indoor unit and the ceiling as shown in the diagram. If the positions of the ceiling surface and unit do not match, air leakage, water leakage, flap operation failure, or other problems may occur.

A Ceiling side

Main unit Ceiling opening dimension

A : Be sure to necessarily make a space within the range of 12 mm ~ 17 mm. If not within this range, malfunction or other trouble may occur.

CAUTION

Never place the panel face-down.

Flap

Either hang it vertically or place it on top of a projecting

object. Placing it face-down will damage the surface.

Do not touch the flap or apply force to it. (This may

cause flap malfunction.)

7-2. How to Install the Panel for Cassette
(1) Removing the air intake grille 1) Remove the 2 screws on the latch of the air intake grille. (Reattach the air intake grille after installation of the panel for cassette.) 2) Slide the air intake grille catches in the direction shown by the arrows 1 to open the grille.
Hinges of air intake grille
Panel for cassette

Air intake grille

Screw Latch

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3. With the air intake grille opened, remove the grille hinge from the panel for cassette by sliding it in the direction shown by the arrow 2. (Reattach the air intake grille after
   installation of the panel for cassette.)

2

(2) Removing the corner cover Push the latches on the corner cover in the direction of the arrow 1 and remove them by sliding in the direction of the arrow 2.

1

1

Panel for cassette

Corner cover 2

Corner cover

Push latches upward to disengage.

Strap

(3) Installing the panel for cassette The power must be turned ON in order to change the flap angle. (Do not attempt to move the flap by hand. Doing so may damage the flap.) 1) Hang the temporary latches on the inside of the panel for cassette to the receptacle on the unit to temporarily attach the panel for cassette in place. The panel for cassette must be installed in the correct direction relative to the unit. Align the REF. PIPE and DRAIN marks on the panel for cassette corner with the correct positions on the unit. When removing the panel for cassette, push the temporary latches outward while holding the panel for cassette.

Push to disengage.

Receptacle on the main unit
Temporary latch

Temporary latches (×2) 48

2. Align the panel installation holes and the unit screw holes. 3) Tighten the provided washer head screws at the 4 panel installation locations so that the
   panel is attached tightly to the unit.
   Drain tube corner
   Refrigerant tube corner

Marking with DRAIN

Panel for cassette

Marking with REF. PIPE

Washer head screws (preinstalled on the panel for cassette)

4. Check that the panel is attached tightly to the ceiling.

At this time, make sure that there are no gaps between the unit and the panel for cassette, or

Do not allow gaps. Main unit

between the panel for cassette and the ceiling

surface.

Ceiling surface Panel for cassette

If there is a gap between the panel and the ceiling, leave the panel for cassette attached and make fine adjustments to the installation height of the unit to eliminate the gap with the ceiling.

Make fine adjustment by a wrench or other tools to the installation height of the unit to eliminate the gap with the ceiling through the holes of the corner cover.

CAUTION

If the screws are not sufficiently tightened, trouble such as that shown in the figure may occur. Be sure to tighten the screws securely.
Air leakage Air leakage from panel for cassette

Staining

Condensation, water leakage

If a gap remains between the ceiling surface and the panel for cassette even after the screws are tightened, adjust the height of the unit again.

Adjust so that there are no gaps.

If there is no affect to the horizontal of the unit and drain tube, adjustment to the installation height of the unit can be made through the hole of the panel for cassette corner.

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(4) Wiring the Panel for Cassette 1) Open the cover of the electrical component box for the indoor unit control PCB. 2) Connect the 22P connector (white) from the panel for cassette to the connector on the indoor unit control PCB in the unit electrical component box. In this case, expose the cutout section of the tube for the wiring protection to the outside from the electrical component box and fix it with the clamper attached to the electrical component box.
Insert connector lock facing PCB edge until it is locked in place. (If not connected completely, the Auto Flap will not operate and “P09” is displayed on the remote controller. When the connector plugged in the wrong direction, parts on the PCB may be damaged.)
Check that the wiring connector is not caught between the electrical component box and the cover.
Check that the wiring connector is not caught between the unit and the panel for cassette.

Lid of electrical component box

Cutout section of the tube for wiring protection

Wiring diagram (Direction that the unit faces has been changed to facilitate explanation.)

Screws (×2)

22P (white)

Connector

Panel for cassette wiring connector

Lock
(5) How to Attach the Corner & Air Intake Grille
A. Attaching the corner cover 1) Check that the safety strap from the corner cover is fastened to the panel for cassette pin, as
shown in the figure. 2) Use the supplied screws to attach the corner cover to the panel for cassette.
Supplied screw
Pin Place the corner cover so that the 5 tabs fit into the holes in the panel for cassette. Then fasten it in place with the supplied screws.

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B. Attaching the air intake grille To install the air intake grille, follow the steps for “Removing the air intake grille” in the
reverse order. By rotating the air intake grille, it is possible to attach the grille onto the panel for cassette from any of 4 directions. Coordinate the directions of the air intake grilles when installing multiple units, and change the directions according to customer’s requests. When attaching the air intake grille, be careful that the flap lead wire does not become caught. Be sure to attach the safety strap that prevents the air intake grille from dropping off to the panel for cassette unit as shown in the figure.
Hole of panel for cassette hook

Hook that prevents the grille from dropping

With this panel for cassette, the directions of the air intake grille lattices when installing multiple units, and the position of the label showing the company name on the corner panel, can be changed according to customer’s requests, as shown in the figure. However, the wireless signal receiver can only be installed at the refrigerant-tubing corner of the ceiling unit.

Refrigerant tube side

Drain pipe side

Locations of air intake grille hinges at shipment

• The grille can be installed with these hinges facing in any of 4 directions.

Optional wireless receiver kit * This position is only possible
for installation.

Electrical component box

Corner cover installation position marked with the Panasonic Logo at shipment.

• Installation possible at any
  of 4 corners

Can be installed rotated 90°

7-3. Others
(1) Checking After Installation 1) Check that there are no gaps between the unit and the panel for cassette, or between the panel for cassette and the ceiling surface. Gaps may cause water leakage and condensation. 2) Check that the wiring is securely connected. If it is not securely connected, the auto flap will not operate. (“P09” is displayed on the remote controller.) In addition, the water leakage and condensation may occur.
(2) Operating the Wireless Remote Controller For details of installation, refer to the Installation Instructions attached to the optional Wireless Remote Controller.

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(3) Selecting DC Fan Motor Tap (4-Way Cassette) Check the optional parts accordingly in the following table.

Table for DC Fan Motor Tap Settings

Setting No.

Remote controller setting data Item code 5d

Contents & optional parts name

Air-flow blocking kit (for 3-way airflow)23

(1)

0001

Air-flow blocking kit (when a duct is connected.)*2

High-ceiling setting 1*3

(3)

0003

High-ceiling setting 2*3

(6)

0006

Air-flow blocking kit (for 2-way airflow)23

1 When using optional parts in different setting No. in combination with multiple units, conform it to the larger setting No. 2 When using the optional air-flow blocking kit for 3-way airflow and 2-way airflow, maximum refrigerant amount and
minimum installation space will be changed. See Section “Check of Density Limit”.
*3 Ceiling height (m)

Indoor unit type

22, 28, 36, 45, 56

60, 73, 90

106, 112, 140, 160

Standard (factory setting)

2.7

3.0

3.6

High-ceiling setting 1

3.2

3.3

4.3

High-ceiling setting 2

3.5

3.6

5.0

Air-flow blocking kit (for 3-way airflow)

3.8

3.8

4.7

Air-flow blocking kit (for 2-way airflow)

4.2

4.2

5.0

1. When setting on the indoor unit control PCB Be sure to turn the power OFF before performing this work. 1 Open the electrical component box cover, then check the indoor unit control PCB. 2 Change the DIP switch (SW001) on the indoor unit control PCB in accordance with the setting number which was confirmed in “Table for DC Fan Motor Tap Settings”.

TP6 TP3 TP1 TP6 TP3 TP1 TP6 TP3 TP1
TP6 TP3 TP1
SW001
TP6 TP3 TP1

Setting No.

(1)

DIP switch

ON 1 23

(3)
ON 1 23

(6)
ON 1 23

Setting example : Knob

ON

1: OFF

ON

2: OFF

123

1 2 3 3: ON

Indoor unit control PCB

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