AIRSYS COM4T CV36H2A Series User manual

AIRSYS COM4T Wall
Mounted Heat Pump
Installation and Operation Manual
Unit Models
CV36H2A
CV60H3A

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This document contains proprietary information that is protected by copyright and other intellectual
property laws. No part of this document may be reproduced, translated, or modified without the prior
written consent of AIRSYS. The information contained in this document is subject to change without
notice.
AIRSYS provides this material as is and makes no warranty of any kind, expressed or implied, including,
but not limited to, the implied warranties of merchantability and fitness for a particular purpose. AIRSYS
shall not be liable for errors contained herein or for incidental or consequential damages (including lost
profits) in connection with the furnishing, performance, or use of this material whether based on warranty,
contract, or other legal theory.
Designations used by other companies to distinguish their products are often claimed as trademarks. In
this document, the product names appear in initial capital or all capital letters. Contact the appropriate
companies for more information regarding trademarks and registration.
Copyright ©2018-2022 by AIRSYS
AIRSYS North America
915 De La Vina St.
Santa Barbara, CA 93101
https://airsysnorthamerica.com

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Table of Contents
Chapter 1: Introduction......................................................................................................................................................................4
Using this Manual ......................................................................................................................................................................4
Model Identification..................................................................................................................................................................5
Acronyms and Abbreviations...........................................................................................................................................................6
Chapter 2: Product Overview...........................................................................................................................................................7
Ventilation Options....................................................................................................................................................................8
PTC Electrical Heater .................................................................................................................................................................9
Filter.................................................................................................................................................................................................9
Chapter 3: Installation......................................................................................................................................................................10
Installation Preparation.........................................................................................................................................................10
Required Materials..................................................................................................................................................................11
Physical Installation ................................................................................................................................................................15
Complete Electrical Connections ......................................................................................................................................21
Complete the Installation Checklist .................................................................................................................................24
Chapter 4: .............................................................................................................................................................................................25
System Operation.............................................................................................................................................................................. 25
Sequence of Operation.........................................................................................................................................................25
Alarms..........................................................................................................................................................................................26
Complete the Registration Card........................................................................................................................................27

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Chapter 1: Introduction
Using this Manual
Read this manual carefully before attempting to install or start the unit. Retain this manual for reference
for the entire operational life of the unit. This manual provides information on the following topics:
• Product overview
• Instructions for physical, and electrical installation of heat pump units
• Userʼs guide
For safety and to achieve the highest levels of performance, always follow the warnings and cautions in
this manual when handling and operating the AIRSYS unit.
Danger. Emphasizes hazardous conditions that could cause personal injury or death.
Warning. Indicates where the operator must proceed with caution to avoid personal injury or
damage to property.
Important. Indicates technical information critical for proper installation or operation.
Table 1 lists symbols that may appear on the external packaging.
Tab le 1 : Packaging Symbols
Symbol
Description
Symbol
Description
THIS SIDE UP
Shows the orientation of the unit.
NO HOOKS
Do not use hooks to lift the packed unit.
FRAGILE
Handle with care.
KEEP AWAY FROM HEAT
The unit must be kept away from heat
sources.
PROTECT AGAINST RAIN:
The packaged unit must be stored in a dry
place.
DO NOT STACK

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Model Identification
Each unit is identified by a model number, such as CV36H2A-AWAXX-X2XX. The elements in the number are explained in Figure 1.
Figure 1: Model Number

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Acronyms and Abbreviations
Table 2 lists acronyms and abbreviations used in this manual.
Table 2 : Acronyms and Abbreviations
Term Meaning
A
Ampere, unit of electric current, or rate of flow of electricity
AAST AIRSYS Authorized Service Technician
AUT/MAN
Automatic/Manual
BMS Building Monitoring System
CFM
Cubic Feet per Minute
Com Common
Comp
Compressor
Cond Condenser
CRV
Commercial Room Ventilator
DC Direct Current
EC Electronically Commutated (Refers to variable speed evaporator/supply fan)
ERV
Energy Recovery Ventilator
Evap Evaporator
FC
Free Cooling
HVAC Heating, Ventilation, and Air Conditioning
Humid
Humidity
I/O Input/ Output
kW
Kilowatt
LED Light Emitting Diode
MC
Mechanical Cooling
N.C.
Normally Closed
N.O.
Normally Open
PSI
Pounds per Square Inch
PWM
Pulse Width Modulation
R
Read Only
RoHS Restriction of Hazardous Substances Directive
R/W
Read/Write
Temp Temperature
VAC Voltage in Alternating Current
VDC
Voltage in Direct Current

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Chapter 2: Product Overview
The AIRSYS COM4T Wall Mounted Heat Pump is a self-contained energy efficient heating and
cooling system, which is designed to offer maximum indoor comfort at a minimal cost without
using valuable indoor floor space or outside ground space. The control system determines the
unitʼs mode of operation: Cooling or Heating, as shown in Figure 2.
Figure 2 Basic Operating Modes
Any grille that meets the 5/8" louver criteria may be used. It is recommended that AIRSYS Return Air
Grille Kit installed when no return duct is used. If using a return air filter grille, filters must be of
sufficient size to allow a maximum velocity of 400fpm.
Note: If no return air duct is used, applicable installation codes may limit this cabinet to installation
only in single-story structures.
Cooling Mode
Heating Mode

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Ventilation Options
Blank Off Plate
The blank-off plate prevents outside air from entering the building.
All capacity and efficiency ratings are based on installation of the blank off
plate. This is recommended for maximum energy efficiency.
Commercial Room Ventilator (CRV)
The power open, spring close, type fresh air damper allows outside fresh air to enter the building. The
adjustable actuator allows varying amounts of outside air to enter the building.
There are (5) blade positions to adjust the airflow allowed into the building:
Tab le 3: CRV Air Flow Data
Energy Recovery Ventilator (ERV)
The energy recovery ventilator harvests energy contained in the exhaust air by mixing it with fresh air
across a stationary cubic heat exchanger. The filter medium is designed to be pulled out for easy
cleaning and replacement.
Tab l e 4: ERV Characteristics
Fresh Air Flow (CFM)
Damper Position
CV36
CV60
1
550
600
.8
450
550
.6
300
400
.4
180
250
ERV characteristics
Dial Position
CFM
Efficiency
6
450
54%
5
400
58%
4
350
62%
3
250
66%
2
220
70%
Figure 3: Blank Off Plate
Figure 4: Fresh Air Damper
Figure 5: Energy Recovery Ventilator

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Economizer
The economizer uses outdoor air to provide cooling when the outdoor
temperature is sufficiently lower than the indoor temperature.
Note: Economizer section is only available for COM4T outdoor
products.
Tab le 5: Economizer Characteristics
PTC Electrical Heater
The PTC electrical heater has both fast thermal response time and low inrush current. A protection
device will automatically cut current when unsafe levels are reached.
The outer edge of the PTC heating component is designed with double insulation. When in contact
with metal, it will not cause short circuits.
Filter
2” MERV8/G4 pleated filters are standard with each unit. The filter slides into for easy serviceability.
This filter can be serviced from the outside by removing the filter access panel. Filters are also
available in MERV10/F5 and MERV13/F7.
Condensate Drain
A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are
openings in the unit base for the drain hose to pass through. In the event the drain hose is connected
to a drain system, it must be an open or vented type system to assure proper drainage.
Economizer characteristics
Model
CFM
Btu/h
kW
CV36H2A
920
17,800
5.24
CV60H3A
1,350
26,200
7.69
Figure 6: Economizer

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Chapter 3: Installation
Installation Preparation
Unpack the unit carefully. Some parts are packed loosely and may move as the packaging is opened.
Before discarding the box, check the packaging carefully for any parts or documents inside. Refer to
Table 6 on Page 12 for the complete list of materials shipped with each unit.
Check for the following:
• The supply voltage meets the requirements as designated: 197-252VAC.
• The install location is clean on the inside and free of excess dirt and dust.
• Ensure that minimum clearance requirements are met (see Clearances on page15)
Also verify that all installer provided items, listed in Tab l e 7 on Page 14 are accounted for.
Danger:All the installation work must be done by a licensed professional. Installation that does
not comply with the instructions herein can result in the loss of warranty coverage. AIRSYS shall not be
held liable for any damage caused to persons or objects due to incorrect installation or operation of
the units.
Warning:All wiring must comply with the local safety standards and building codes under all
circumstances.
Warning: For outdoor use, the risk of electric shock can cause injury or death. Disconnect all
remote electric power supplies before installation.
When no longer in use, disposal of equipment and materials must be compliant with local laws and
standards.
Delivery
When the units are delivered, be sure to inspect them to verify that they have not been damaged
during transport. Also verify that all requested accessories listed on the purchase order have been
included.
Important: If packaging shows any signs of shipping damage, or potential shipping damage, it
is very important to annotate shipping damage on the Bill of Lading prior to signing for the freight. In
order to recover for any damage, please take detailed photographs of all the packaging before the
external packaging is removed. Once detailed photos of the external packaging have been taken, then
the external packaging may be removed so the items can be inspected further. Please document with
photos any damage to the equipment that relates directly to the damage observed to the external
packaging. Without the detailed photos, it will be very difficult to recover equipment loss.
Warranty
The warranty duration is (60) months from the date of installation. AIRSYS warrants that its
products will be free from defects in materials and workmanship for a period of (60) months after
installation.

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AIRSYS will furnish, free of charge, all replacement parts for any component failures that occur within
the warranty period. The customer is responsible for the cost of shipment of replacement material
from AIRSYS North America.
Note: Warranty assumes the warranty registration card that accompanied the units in shipment is
submitted. If the warranty registration card was not filled out and returned to the supplier, then the
warranty will expire (60) months from the date of shipment for all components.
The warranty does not cover damage to the systems caused by misuse or abuse of the systems such as
physical damage due to mishandling. The warranty does not cover damage caused by force majeure.
Important: Any mishandling of the equipment or modifications to the equipment, unless agreed
upon in writing by AIRSYS, will void the warranty.
Moving the Unit
Forklifts are recommended for moving, loading, unloading, and positioning the COM4T unit for
installation. If bands or ropes are used to create a sling, make sure that excessive force is not applied
to the upper edges of the machines or the package to avoid cosmetic or material damage. When
using spacing bars, protective materials are required around the units to prevent damage. To avoid
damage to the units while moving or transporting, ensure the units always remain in the upright
position.
General Safety Rules
Danger:Do not carry out any operation on the machines if you do not have sufficient knowledge
of the operating principles and have not taken all the precautions that permit the system to operate
in safe conditions.
Warning:Work on the electric board only after verifying prime power is disconnected. Do not
apply power to the machine with the covers removed.
Important: Before carrying out inspections, maintenance operations, and safety checks, follow
all accident-prevention standards such as wearing protective goggles and gloves.
Required Materials
AIRSYS Supplied Materials
Table 6: AIRSYS System Shipping Materials List has all the material supplied by AIRSYS. After opening
the package, verify that all items are accounted for. If any material is missing, please contact an AIRSYS
distribution center using the following information:
AIRSYS North America
Web: https://airsysnorthamerica.com
Email: [e-mail]
Phone: [phone]

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Tab le 6: AIRSYS Provided Materials
System Shipping Materials List
No
.
Part # Item Description Comments CV36H2A CV60H3A
1 4070142980 CV36H2A-AWAXX Main Unit 1 N/A
2 4070142960 CV60H3A-AWAXX Main Unit N/A 1
3 - Shipping list In document pack 1 1
4 - Installation and operation manual In document pack 1 1
5 - Blank nameplate In document pack 1 1
6 2801021420 Certification In document pack 1 1
7 8458707260 Cable ties, 300X4mm In document pack 10 10
8 7151011110 Rubber insulation cotton In the box 3 3
9 8551016130 Hexagon flange bolts with cross
recess, M5*16
In document pack, for door
panel backup 2 2
Ventilation Options
No. Part # Item Description Comments Blank-off CRV ERV ECONOMIZER
1 2121008960
Blank Off Panel for
cabinet H2/H3
Ventilation Option 1 N/A N/A N/A
2 2121008610
CRV Motorized Fresh
Air Ventilator for
Cabinet H2/H3
Ventilation Option N/A 1 N/A N/A
3 2121008570
Energy Recovery
Ventilator for Cabinet
H2/H3
Ventilation Option N/A N/A 1 N/A
4 2121008860
Economizer (Full Flow)
for Cabinet H2/H3
Ventilation Option N/A N/A N/A 1
5 - Shipping List In document pack 1 1 1 1
6 8553702750
Self-tapping Screws
，
4.2*13
In document pack 13 12 N/A N/A
7 9000001290
Self-tapping plastic
protective cap
In document pack 13 12 N/A N/A
8 8551016130
Hexagonal Flange
bolt, Stainless steel,
GB5789
，
M5*16
In document pack N/A N/A 6 6
9 7354006900
Nylon washers
，φ
10.6*φ5.2* 1.2
In document pack N/A N/A 6 6
10 8458716720
Cable ties, G370HDB
L=370
In document pack N/A N/A 5 3

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Accessory Options:
No.
Part #
Item Description
Comments
Curb
Curb Adapter
1
2121008580
Curb for Cabinet H2/H3
1
N/A
2
2121008590
Adapter/Header for Cabinet H2/H3
N/A
1
3
2121009330
Top Supply Panel Option for Cabinet H2/H3
N/A
N/A
4
-
Shipping List
In document pack
1
1
5 8551014060
Hexagonal bolt, Stainless steel, GB/T5783
，
M10×40
In document pack
12 N/A
6
8552905200
Spring washer, Stainless steel, GB/T93
，
10
In document pack
12
N/A
7
8552904750
Flat washer, Stainless steel, GB/T97.1
，
10
In document pack
12
N/A
8 8551016130
Hexagonal Flange bolt, Stainless steel,
GB5789，M5*16
In document pack
2 N/A
9
8458716720
Cable ties, G370HDB L=370
In document pack
10
N/A
10 1030230830 Fixed panel
Connect the Top
Curb and Curb, In
the box
N/A 2
11 8551001500 Hexagonal bolt, Stainless steel, GB/T5783，
M6*20
Connect the Top
Curb and Curb, In
the box
N/A 12
12 8552904550 Flat washer, Stainless steel, GB/T97.1，6
Connect the Top
Curb and Curb, In
the box
N/A 12
13 8552905180 Spring washer, Stainless steel, GB/T93，6
Connect the Top
Curb and Curb, In
the box
N/A 12
Heater Options:
No. Part # Item Description Comments 4kW 8kW 12kW
1 2121008460 4kW PTC Electrical Heater In the box 1 N/A N/A
2 8455520990
Miniature Circuit-Breaker
，
GSB2-D25/2
In document pack 1 N/A N/A
3 2121008480 8kW PTC Electrical Heater In the box N/A 1 N/A
4 8455521840
Miniature Circuit-Breaker
，
GSB2-D40/2
In document pack N/A 1 N/A
5 2121008500 12kW PTC Electrical Heater In the box N/A N/A 1
6 8455521000
Miniature Circuit-Breaker
，
GSB2-D63/2
In document pack N/A N/A 1
7 - Shipping List In document pack 1 1 1
8 8554504650 Pan head screws with cross recess,
GB/T818，M4*16
To fix the Electric
Heater In document
pack
2 2 2
9 8552906140 Plain Washers, GB/T97.1，M4 In document pack 2 2 2
10 8552905160
Single coil spring lock Washers, GB/T93
，
M4
In document pack 2 2 2
11 8458716720 Cable ties, G370HDB L=370 In document pack 5 5 5

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Materials to be Supplied by Installer
Table 7lists items required for installation that must be supplied by installer. The wire length and
gauge depend on site-specific conditions. However, recommendations are provided.
Table 7: Installer Supplied Materials
No.
Item
Qty
Description
Comments
1 AC power supply
cable
Same as number
of units 1 set of two-wire cable per unit
Refer to Summary Electrical Ratings;
Note the electric heater capacity.
2
Silicone sealant
As needed
Commercial grade outdoor silicone sealant
3 Weather stripping As needed
Commercial grade neoprene weather
stripping or equivalent Recommend a
minimum of 25 mm (~1”) wide and 20 mm
(~0.8”) thick
Used to frame the HVAC outlet and
inlet to create a weather tight seal
4 Nylon zip-tie As needed Small nylon zip tie
For properly dressing cables and
harnesses
5 Thermostat 1
Thermostat should have at least 2 stage
heat pump compatibility
6
Thermostat cable
As needed
24-32AWG
7
Expansion bolt M10
10
Connect unit/curb to wall.
Length depends on the wall material
and thickness.
Summary Electrical Ratings (Wire Sizing)
Table 8: Electrical Ratings
Single Circuit Dual Circuit #1 Dual Circuit #2
Mode
Heater Size
MCA
MOP
MCA
MOP
MCA
MOP
CV36H2A
0kw 16 25 -- -- -- --
4kw 37 45 16 25 21 25
8kw 59 70 16 25 43 45
12kw 81 90 16 25 65 65
CV60H3A
0kw 27 40 - - - -
4kw 49 65 27 40 22 25
8kw 70 85 27 40 43 45
12kw 92 105 27 40 65 65
Note:
MCA = Minimum Circuit Ampacity (Wiring Amps)
MOP = Maximum Overcurrent Protection (HACR Breaker Size)

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Physical Installation
Select the Wall for Installing the Unit
Select the wall where the unit will be installed. Be certain that the wall can support the weight of the
unit and that sufficient space is available for easy operation and installation, both inside and outside
the mounting location. Refer to Table 11 below for unit dimensions and weights by model number.
Refer to Table 10 for weights of ventilation options.
Tab le 9: Unit Dimensions and Weight
Model CV36H2A CV60H3A
Width in 45.67 45.67
Depth in 27.56 27.56
Height in 85.83 92.91
Weight lbs 730 830
Tab le 10: Ventilation Option Weight
Accessory Blank Off Plate Fresh Air Damper Economizer ERV
Weight (lbs) 10 40 40 50
Clearances
• 48” (1200mm) free space in front of the unit
• 40” (1000mm) free space at the side of the unit
Important:
1. The wall selected for the unit must be strong enough to support both the static weight of the
unit and the vibration of a unit under operation.
2. For any unit equipped with electrical heat, the supply grille should be at least three inches
away from combustible material.
NOTE: To assist in the installation process, the following figures provide the unit dimensions to a
tolerance of ± 1/16” (2 mm).

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Tab le 11: Unit Dimensions
MODEL
WIDTH
DEPTH
HEIGHT
SUPPLY
RETURN
(W)
(D)
(H)
I
W1
F
W1
A
B
C
E
G
V
J
M
N
O
K
S
L
T
P
Q
CV36H2A-
mm
1160
700
2180
250
760
403
760
748
402
170
684
762
40
81
1200
1240
20
178
450
130
142
803
855
inch
45.67
27.56
85.83
9.84
29.92
15.87
29.92
29.45
15.83
6.69
26.93
30
1.57
3.19
47.24
48.82
0.79
7.01
17.72
5.12
5.59
31.61
33.66
CV60H3A-
mm
1160
700
2360
250
760
403
760
967
402
170
890
762
40
55
1200
1240
20
268
450
220
142
1021
1073
inch
45.67
27.56
92.91
9.84
29.92
15.87
29.92
38.07
15.83
6.69
35.04
30
1.57
2.17
47.24
48.82
0.79
10.55
17.72
8.66
5.59
40.2
42.24

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Make Openings In the Wall
Case 1: Direct Wall Mount. Cut openings per table below.
Table 12: Opening Dimension
MODEL
Unit of
measurement
Dimensions
A
B
C
D
E
F
G
H
I
J
K
L
CV36H2A
mm
506
403
762
250
760
123
φ
35
119
52
1200
φ
12
450
inch
19.92
15.87
30
9.84
29.92
4.84
φ
1.38
4.69
2.05
47.24
φ
0.47
17.72
CV60H3A
mm
622
403
762
250
760
123
35
132
52
1200
φ
12
450
inch
24.49
15.87
30
9.84
29.92
4.84
φ
1.38
5.2
2.05
47.24
φ
0.47
17.72
Figure 7: Wall Opening and Hole Location View

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Case 2: Curb Mounting:
Figure 8：Wall Opening and Hole Location View
Case 3: Curb mounting with extension
Figure 9: Wall Opening and Hole Location View-
Reversible panel offers 2
return air opening
positions which can be
selected according to
application.

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CASE 1
CASE 2
CASE 3

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Framing and Mounting Instructions
Figure 10: Wall Mounting Instruction
Install Weather Stripping
Before mounting the unit on the outside wall, fix neoprene weather stripping (installer provided)
around the openings of the air supply and the air return to ensure an airtight closure, as shown in
Figure 11: Install Weather Stripping.
Figure 11: Install Weather Stripping
Weather stripping
Weather stripping