MITSUBISHI ELECTRIC PCA-A42KA8, PUY-A42NKA7 42,000 BTU/H Ceiling Suspended Indoor Unit Owner’s Manual

: July 29, 2024
: Mitsubishi Electric

Table of Contents

MITSUBISHI ELECTRIC PCA-A42KA8, PUY-A42NKA7 42,000 BTU/H Ceiling
Product Information
Product Usage Instructions
FAQ
FEATURES
SPECIFICATIONS
ACCESSORIES
DIMENSIONS
References
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MITSUBISHI ELECTRIC PCA-A42KA8, PUY-A42NKA7 42,000 BTU/H Ceiling

Suspended Indoor Unit

MITSUBISHI-ELECTRIC-PCA-A42KA8,-PUY-A42NKA7-42,000-BTU-H-Ceiling-Suspended-
Indoor-Unit-Product

Product Information

Specifications Indoor Unit

BTU/H: 42,000
Operating Temperature Range: 95.6°F / 95.6°F
Fan Motor Output: 4,110 CFM (Cooling)
Compressor Type: INVERTER-driven twin rotary
Refrigerant: R410A
Maximum Pre-Charged Piping Length: 225 ft
Maximum Height Difference: 100 ft

Outdoor Unit

BTU/H: 42,000
Operating Temperature Range: 115°F / -40°F

Product Usage Instructions

Installation

Ensure proper placement of both indoor and outdoor units as per installation guidelines.
Connect gas and liquid pipes according to the specified sizes and lengths.
Install the control interface and any additional accessories as needed.

Operation

Power on the units using the designated power source.
Select the desired operating mode (cooling only).
Set the temperature using the remote controller or wired interface.
Monitor the unit for optimal performance and adjust settings as necessary.

Maintenance

Regularly clean air filters to ensure efficient airflow.
Schedule professional maintenance checks to inspect refrigerant levels and overall unit performance.
Keep the outdoor unit clear of debris for proper ventilation.

FAQ

Q: Can I use the wireless remote controller with the PCA-A42KA8 indoor unit?

A: No, the wireless remote controller (PAC-WHS01IE-E) is not compatible with the PCA-A42KA8 indoor unit. It is recommended to use the wired remote controller or other compatible control interfaces.

Q: What is the maximum pre-charged piping length for this system?

A: The maximum pre-charged piping length for this system is 225 feet.

Q: How often should I clean the air filters?

A: It is recommended to clean the air filters every 2-4 weeks to maintain efficient airflow and system performance.

FEATURES

INDOOR UNIT FEATURES

Airflow settings for high and low ceiling applications
Knock-out for outside-air intake
Optional i-see SensorTM for air distribution and energy saving
Auto fan speed mode
Filter status indicator
Easy-to-clean, washable filter
Suspends from the ceiling for quick and easy installation
Ideal for larger retail stores, classrooms, and restaurants
Multiple control options available:
- kumo cloud® smart device app for remote access
- Third-party interface options
- Wired or wireless controllers

OUTDOOR UNIT FEATURES

Variable speed INVERTER-driven compressor
Pre-charged with refrigerant volume for piping length up to 100 ft
Low ambient cooling down to -40°F providing 100% capacity (with wind baffles)
24-hour continuous operation (cooling mode)
High-pressure protection
Fast restart
Superior energy and operational efficiency
Seacoast protection*
- External Outer Panel: Phosphate coating + Acrylic-Enamel coating
- Fan Motor Support: Epoxy resin coating (at edge face)
- Separator Assembly Valve Bed: Epoxy resin coating (at edge face)
- Blue Fin treatment is an anti-corrosion treatment that is applied to the Heat exchanger coil to protect it against airborne contaminants.
- Heat exchanger coil and base panel rated for 2,000 hours per ASTM B117 testing

Seacoast protection standard from 2022 production

SPECIFICATIONS

SPECIFICATIONS: PCA-A42KA8 & PUY-A42NKA7

Cooling at 95°F1

| Maximum Capacity| BTU/H| 42,000
---|---|---|---
Rated Capacity| BTU/H| 42,000
Minimum Capacity| BTU/H| 16,000
Maximum Power Input| W| 4,110
Rated Power Input| W| 4,110
Moisture Removal| Pints/h| 11.7
Sensible Heat Factor| 0.69
Power Factor [208V / 230V]| %| 95.6 / 95.6

Efficiency

Electrical

Indoor Unit

Outdoor Unit

Refrigerant

Piping

| Gas Pipe Size O.D. [Flared]| In.[mm]| 5/8 [15.88]
---|---|---|---
Liquid Pipe Size O.D. [Flared]| In.[mm]| 3/8 [9.52]
Maximum Piping Length| Ft. [m]| 225 [68]
Maximum Height Difference| Ft. [m]| 100 [30]
Maximum Number of Bends| 15

NOTES:

AHRI Rated Conditions
(Rated data is determined at a fixed compressor speed) 1Cooling (Indoor // Outdoor) °F 80 DB, 67 WB // 95 DB, 75 WB

Indoor/Outdoor Unit Operating Temperature Range (Cooling Air Temp [Maximum / Minimum]):
- Wind baffles are required to operate below 23°F DB in cooling mode.
- A cooling-only system with advanced wind baffle: -40°F – 115°F.
- Refer to wind baffle documentation for further information.
Outdoor Unit Operating Temperature Range (Cooling Thermal Lock-out / Re-start Temperatures; Heating Thermal Lock-out / Re-start Temperatures):
- The system cuts out in heating mode to avoid thermistor error and automatically restarts at these temperatures.
Blue Fin Coating Standard from 2022 production:
- PU(Y/Z)-A(12/18)NKA7 – Beginning with serial number 12U*****
- PU(Y/Z)-A(24/30/36/42)NKA7 – Beginning with serial number 1ZU*****

ACCESSORIES

INDOOR UNIT ACCESSORIES: PCA-A42KA8

Control Interface

| CN24 Relay Kit| □ CN24RELAY-KIT-CM3
---|---|---
IT Extender| □ PAC-WHS01IE-E
Kumo station® for kumo cloud®| □ PAC-WHS01HC-E
Procon BACnet® and Modbus® Interface| □ PAC-UKPRC001-CN-1
Remote Operation Adapter‡| □ PAC-SF40RM-E
Thermostat Interface| □ PAC-US445CN-1
USNAP Adapter| □ PAC-WHS01UP-E
Wireless Interface for Kumo cloud®| □ PAC-USWHS002-WF-2

Remote Sensor

| Flush Mount Remote Temperature Sensor| □ PAC-USSEN002-FM-1
Remote Temperature Sensor| □ PAC-SE41TS-E
Wireless temperature and humidity sensor for Kumo cloud®| □ PAC-USWHS003-TH-1

Wired Remote Controller

Wireless Remote Controller

Condensate

| Blue Diamond (Advanced) Mini Condensate Pump w/ Reservoir & Sensor (208/230V) [recommended]| □ X87-721
Blue Diamond (MegaBlue Advanced) Condensate Pump w/ Reservoir & Sensor| □ X87-835
Refco Condensate Pump (100-240 VAC) up to 120,000 BTU/H| □ COMBI
Disconnect Switch| (30A/600V/UL) [fits 2” X 4” utility box] – Black| □ TAZ- MS303

Lineset

| 10’ x 3/8” x 10’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-10
100’ x 3/8” x 100’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-100
15’ x 3/8” x 15’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-15
30’ x 3/8” x 30’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-30
50’ x 3/8” x 50’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-50
65’ x 3/8” x 65’ x 5/8” Lineset (Twin-Tube Insulation)| □ MPLS385812T-65

NOTES:
PAC-SF40RM-E (Unable to use with wireless remote controller)

OUTDOOR UNIT ACCESSORIES: PUY-A42NKA7

Air Outlet Guide| Air Outlet Guide (1 Piece)| □ PAC-SH96SG-E (two pieces are required)
---|---|---

Control/Service Tool

| Control/Service Tool| □ PAC-SK52ST
M- & P-Series Maintenance Tool Cable Set| □| M21EC0397
USB/UART Conversion Cable (Required for all laptop connections)| □| M21EC1397

M-NET Converter

| M-NET Converter| □ PAC-SJ85MA-E
M-NET Converter| □ PAC-SJ95MA-E

Mini-Split Wire

Stand

Wind Baffle

| Front Wind Baffle| □ WB-PA3 (two pieces are required)
Rear Wind Baffle| □ WB-RE6
Side Advanced Wind Baffle| □ WB-SD6

DIMENSIONS

INDOOR UNIT DIMENSIONS: PCA-A42KA8

FRONT VIEW

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In the case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in the initial position.(The heat exchanger might be clogged because of dust)

NOTES

Use M10 or W3/8 screw for the anchor bolt.
Please be sure when installing the drain pump (option parts), the refrigerant pipe will be only upward.

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Drainage pipe connection(1(26mm)l.D.)
Drainage pipe connection(for the left arrangement)
Knockout hole for left drain-piping arrangement
Refrigerant-pipe connection (gas pipe side/flared connection)
Refrigerant-pipe connection (liquid pipe side/flared connection)
Knockout hole for upper drain pipe arrangement
Knockout hole for fresh air intake Ф3-15/16(Ф100)
Knockout hole for wiring arrangement Ф7/8(Ф22) Accessory…Drain socket (1(26mm)I.D.)

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OUTDOOR UNIT DIMENSIONS: PUY-A42NKA7

FREE SPACE (Around the unit)
The diagram below shows a basic example. Explanations of particular details are given in the installation manuals etc.
SERVICE SPACE
Dimensions of space needed for service access are shown in the below diagram.
FOUNDATION BOLTS
Please secure the unit firmly with 4 foundation (M10<W3/8>) bolts. (Bolts and washers must be purchased locally.)
PIPING-WIRING DIRECTIONS
Piping and wiring connections can be made from 4 directions: FRONT, Right, Rear, and Below.

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Example of Notes

Refrigerant GAS pipe connection (FLARE) ø15.88(5/8F)
Refrigerant LIQUID pipe connection (FLARE) ø9.52(3/8F)
- *1 … Indication of STOP VALVE connection location.

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