Cooper & Hunter CH-IRT05NM User manual

Models:
CH-IRT05NM
CH-IRT08NM
CH-IRT15NM
Thank you for choosing Cooper&Hunter rooftop package units, please read this service manual
carefully before operation and retain it for future reference.
Owner`s manual
Rooftop package units
ROOFTOP PACKAGE UNITS

Preface
Please carefully read this manual before installation and operation. Instructions
before reading this manual：
(1) For guaranteeing personal safety when operating this system, please strictly
follow the instructions listed in the manual.
(2) Make sure that this manual is kept by operators and serviceman.
(3) Please contact Cooper&Hunter immediately when the unit can not run
normally.
1) Information on the nameplate (including model, cooling capacity, product
number and delivery date).
2) Malfunction (Describe the actual condition before and after the error happens
in details).
(4) Every unit has passed through strictly test and trial run before delivery. In the
event of damage to the unit due to improper disassembly, user is not allowed
to dismantle and check the unit by themselves. Please contact local dealer,
then C&H professional serviceman will help to check the unit.
(5) All the information and illustrations shown in this manual are all for reference.
Manufacturer reserves the rights of making necessary change at anytime
without advance notice owing to design improvement or other reasons.

Contents
1 Safety Precautions...........................................................................1
2 Product Introduction.........................................................................3
2.1 Nominal Operating Condition..................................................................3
2.2 Operating Range.....................................................................................3
3 Pre-installation Instruction................................................................4
3.1 Checking Product Received....................................................................4
3.2 Standard Accessory Parts.......................................................................4
3.3 Before Beginning Installation ..................................................................5
3.4 Codes & Regulations ..............................................................................5
3.5 Replacement Parts..................................................................................5
4 Installation Instructions.....................................................................6
4.1 Physical Dimension.................................................................................6
4.2 General Information ................................................................................7
4.3 Location...................................................................................................8
4.4 Crane Way ..............................................................................................8
4.5 Installation Positions and Clearances.....................................................9
4.6 Installation of Condensate Pipe ............................................................11
5 Electrical Installation.......................................................................12
5.1 Electrical Date and Wire Sizing.............................................................12
5.2 Connect Wiring to the Terminals...........................................................12
5.3 Electrical Connections-Supply Voltage.................................................14
5.4 Wiring Diagram .....................................................................................15
6 Trial Run.........................................................................................15
7 Troubleshooting..............................................................................16
8 Unit Function..................................................................................17
8.1 Setting of Double Indoor Room Sensors ..............................................17
8.2 Checking of Outdoor Ambient Temperature..........................................17
9 Error Code Meaning.......................................................................17
10 Maintenance.................................................................................19

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1 Safety Precautions
The following symbols and labels are used throughout this manual to indicate
immediate or potential hazards. It is the owner’s responsibility to read and comply
with all safety information and instructions accompanying these symbols. Failure to
heed safety information increases the risk of serious personal injury or death,
property damage and/or product damage.
Warning:
A symbol indicating that improper operation might cause human death or
severe injuries.
Caution:
A symbol indicating that improper operation might cause human injury or
property damage.
Warning:
①. This unit shall be used in offices, restaurants, residences or similar places.
②. Please seek an authorized repair station for installation work. Improper
installation might cause water leakage, electric shock or fire.
③. Please install at a place strong enough to support the weight of air
conditioner unit. If not, the air conditioner unit might fall down and cause
human injury or death.
④. To ensure proper drainage, the drainage pipe shall be correctly installed
according to installation instructions. Improper installation of pipes might
cause leakage.
⑤. Keep air flow to avoid shortage of oxygen in the room.
⑥. Do not use or store flammable, explosive, poisonous or other dangerous
substances beside the air conditioner.
⑦. In case of trouble (e.g. burnt smell), please immediately cut off the main
power of air conditioner unit.
⑧. The NULL LINE of power input MUST be connect to the “N” section of the
terminal board! A WRONG CONNECTION will cause the DAMAGE of unit!
⑨. This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities or lack of experience and
knowledge unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their

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safety.Children should be supervised to ensure that they do not play with
the appliance.
⑩. If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Caution:
①. Before installation, please check the power supply for compliance with the
ratings on nameplate. Check the power safety as well.
②. Before use, please check and confirm if the drainage pipes and cables are
correctly connected, hence to eliminate the risk of water leakage, electric
shock or fire.
③. Main power must be securely earthed to ensure effective grounding of air
conditioner unit and avoid the risk of electric shock. Please do not connect
the earthing cable to coal gas pipe, water pipe, lightning rod or telephone
line.
④. Once started, the air conditioner shall not be stopped at least after 5
minutes or longer; otherwise the oil return to compressor may be affected.
⑤. Do not let the child to operate the air conditioner unit.
⑥. Do not operate the air conditioner unit with wet hands.
⑦. Please disconnect the main power before cleaning the air conditioner or
replacing the air filter.
⑧. Please disconnect the main power if to put the air conditioner unit out of
use for a long period.
⑨. Please do not expose the air conditioner unit directly under corrosive
environment with water or moisture.
⑩. Please do not foot on or place any goods on air conditioner unit.
⑪.After electrical installation, the air conditioner unit shall be energized for
electrical leakage test.
⑫.An all-pole disconnection switch having a contact separation of at least
3mm in all poles should be connected in fixed wiring.
⑬.The appliance shall be installed in accordance with national wiring
regulations.
⑭.The temperature of refrigerant circuit will be high, please keep the
interconnection cable away from the copper tube.

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2 Product Introduction
COOPER&HUNTER rooftop packaged units provide a wide capacity range
from 5 to 15 Ton. These units are completely assembled, piped and wired at the
factory to provide one-piece shipment and rigging. Each unit is pressurized with a
holding charge of Refrigerant-410a for storage and shipping.
The compact design, attractive appearance, outstanding anti-rust cabinet and
quiet operation make these units suitable for almost any manufactured or modular
homes.
2.1 Nominal Operating Condition
Item
Outdoor Conditon
Indoor Condition
DB
Temperatrue(°C)
WB
Temperatrue(°C)
DB
Temperatrue(°C)
WB
Temperatrue(°C)
Cooling
35
24
27
19
Heating
7
6
20
15
2.2 Operating Range
CH-IRT05NM
Item
Outdoor Condition (DB °C)
Cooling
-5~52
Heating
-15~24
CH-IRT08NM
Item
Outdoor Condition (DB °C)
Cooling
5~52
Heating
-15~24
CH-IRT15NM
Item
Outdoor Condition (DB °C)
Cooling
5~52
Heating
10~24

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3 Pre-installation Instruction
3.1 Checking Product Received
Upon receiving the product, check any damage from transportation. Shipping
damage is the responsibility of the carrier. Verify the model number, specifications
and accessories are correct prior to installation. The distributor or manufacturer will
not accept claims from dealers for transportation damage or installation of
incorrectly shipped units.
3.2 Standard Accessory Parts
The standard accessory parts listed below are furnished and should be used as
required.
No.
Name
Appearance
Q'ty
Usage
1
Wired Controller
1
To control the unit
2
Screw
2
To fix the base plate of
wired controller and
installation hole of the
wall together

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3.3 Before Beginning Installation
Carefully read all instructions for the installation prior to installing product. Make
sure each step or procedure is understood and any special considerations are taken
into account before starting installation. Assemble all tools, hardware and supplies
needed to complete the installation. Some items may need to be purchased locally.
Make sure everything needed to install the product is on hand before starting.
3.4 Codes & Regulations
This product is designed and manufactured to comply with national codes. It is
installer’s responsibilities to install the product in accordance with such codes
and/or any prevailing local codes/regulations. The manufacturer assumes no
responsibilities for equipment installed in violation of any codes or regulations.
3.5 Replacement Parts
When reporting shortages or damages, or ordering repair parts, give the
complete product model and serial numbers as stamped on the product.
Replacement parts for this product are available through your contractor or local
distributor.

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4 Installation Instructions
4.1 Physical Dimension
CH-IRT05NM
B
A
C
D
I
J
F
E
GH
K L M
CH-IRT08NM

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CH-IRT15NM
Dimension
(mm)
A
B
C
D
E
F
G
H
I
J
K
L
M
5Ton
815
1750
1100
80
133
408
61
904
50
145
125
795
169
8Ton
1225
2210
1450
75
134
670
100
1112
84
198
211
868
361
15Ton
1245
2810
2240
90
144
592
43
1872
177
211
168
1900
168
Note: Above diagrams may be different from actual mode
4.2 General Information
Nominal
Capacity
Model
Power Supply
Ton
Refrigeran
t
Model Name
Function
Climate type
V, Ph, Hz
5
R410A
CH-IRT05NM
Heat Pump
T3
380-415V, 3Ph,
50/60Hz
8
R410A
CH-IRT08NM
Heat Pump
T3
380-415V, 3Ph,
50/60Hz
15
R410A
CH-IRT15NM
Heat Pump
T3
380-415V, 3Ph,
50/60Hz
Note: 1Ton =12000Btu/h = 3.517kW

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4.3 Location
To ensure the unit in proper function, selection of installation location must be
in accordance with following principles.
(1) Unit shall be installed so that the air discharged by outdoor fan will not return
and that sufficient space for repair shall be provided around the unit.
(2) The installation site must have good ventilation, so that the unit can take in and
exhaust enough air.
(3) Place of installation shall be strong enough to support the weight of unit, and it
shall be able to insulate noise and prevent vibration. Ensure that the wind and
noise from the unit will not affect your neighbors.
(4) Avoid direct sunshine over the unit. It is better to set up a sun shield as the
protection.
(5) Place of installation must be able to drain the rainwater and defrosting water.
(6) Place of installation must ensure the unit will not subject to the influence of
rubbish or oil fog.
(7) The installation site must be at a place where the air exhaust outlet does not
face strong wind.
(8) Unit must be fixed on stable and solid surface of floor.
4.4 Crane Way
(1) When removing the unit, two ropes are needed to hang the unit along the four
ways.
(2) In order to avoid the extrusion, between the ropes should be add something to
protect the unit (e.g. batten).
(3) Please use M12 to tight the support fundus.

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4.5 Installation Positions and Clearances
Note: Above diagrams may be different from actual model.
CH-IRT05NM
Installation Clearances
DIMENSION
(Minimum)
mm
inch
A
600
24
B
1100
43
C
860
34
D
1100
43
E
1100
43

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CH-IRT08NM
Note: Above diagrams may be different from actual model.
CH-IRT15NM
Note: Above diagrams may be different from actual model.

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CH-IRT08NMCH-IRT15NM
Installation Clearances
DIMENSION
(Minimum)
mm
inch
A
1000
39
B
1500
59
C
1100
43
D
1100
43
E
1830
72
4.6 Installation of Condensate Pipe
After the unit is installed, it is required to check the level of the whole unit. The
unit must be placed horizontally to ensure the unit in proper function.
(1) When shipped out from factory, both the condensate outlets are blocked by
rubber plug. So before installation, please take the rubber plug out.
(2) Condensate removal is performed by attaching a PVC pipe to the drain pan
and terminated in accordance with local or state Plumbing/HVAC codes.
(3) The condensate pipe shall be installed with an inclining angel of 5~10°, so as
to facilitate the drainage of condensate.
(4) As the inside of the unit is in the negative pressure status, it is required to set
up a backwater elbow. The requirements is: A=B≥P/10+20(mm)
P is the absolute pressure inside the unit. The unit of the pressure is Pa.
(5) After the electrical installation is completed, carry out the testing of the
drainage system.

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Model(Ton)
Drain Connection Size(inch)
05
3/4"(NPT)
08
3/4"(NPT)
15
3/4"(NPT)
5 Electrical Installation
5.1 Electrical Date and Wire Sizing
Unit Model
Designation
Power Supply
(V, Ph, Hz)
Capability of
Air Switch(A)
Min. Sectional
Area of Earth
Wire(mm2)
Min. Sectional
Area of Power
Cord(mm2)
CH-IRT05NM
380-415V,3Ph,50/60Hz
25A
4.0
4.0
CH-IRT08NM
380-415V,3Ph,50/60Hz
32A
6.0
6.0
CH-IRT15NM
380-415V,3Ph,50/60Hz
50A
10.0
10.0
5.2 Connect Wiring to the Terminals
Caution:
Please note the following items before installing the electric appliance.
①. Check if the power supply accords with its value on the nameplate.
②. The capacity of the power supply must be large enough.
③. The circuit should be installed by the professional technician.
④. In fixed circuit, there must be electricity leakage protection switch of
enough power capacity and air switch with space between its electrode
contacts ≥3mm.
⑤. Single wire connection.
a) Peel off the insulation for 25mm with pliers.
b) Remove the screw from the terminal board.
c) Bend the peeled wire into circle with pliers.
d) Screw cross the circle and fix it on the terminal board.
⑥. Strand wires connection.
a) Peel off the insulation for 10mm with pliers.
b) Remove the screw from the terminal board.

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c) Clamp a round terminal of the peeled wires.
d) Screw cross the circle and fix it on the terminal board.
Warning:
If the power line or the signal line is defective, use the special coil to replace it.
①. Before connecting lines, read the voltages of the relevant parts on the
nameplate. Then carry out line connection according to the schematic
diagram.
②. The air-conditioning unit shall have special power supply line which shall
be equipped with electricity leakage switch and air switch, so as to deal
with overload conditions.
③. The air-conditioning unit must have grounding to avoid hazard owing to
insulation failure.
④. All fitting lines must use crimp terminals or single wire. If multiple twisted
wires are connected to terminal board, arc may arise.
⑤. All line connections must conform to the schematic diagram of lines.
Wrong connection may cause abnormal operation or damage of the
air-conditioning unit.
⑥. Do not let any cable contact the refrigerant pipe, the compressor and
moving parts such as fan.
⑦. Do not change the internal line connections inside the air-conditioning unit.
The manufacturer shall not be liable for any loss or abnormal operation
arising from wrong line connections.

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⑧. If the supply cord is damaged, it must be replaced by the manufacturer or
its service agent or a similarly qualified person in order to avoid a hazard.
⑨. All of the supplied components, material, and electric operation should be
accorded with the local principles.
⑩. The null line of power input must be connected to the “N” section of the
terminal board! A wrong connection willl cause the damage of unit!
5.3 Electrical Connections-Supply Voltage
(1) Air-conditioning unit with single-phase power supply
1) Remove the Electric Box Cover of the unit.
2) Pass the cable though rubber ring.
3) Connect the power supply cable to the “L1, L2” terminals and the grounding
screw.
4) Use cable fastener to bundle and fix the cable.
(2) Air-conditioning unit with 3-phase power supply
1) Remove the Electric Box Cover of the unit.
2) Pass the cable though rubber ring.
3) Connect the power supply cable to terminals and the grounding screw
according to wiring diagram.
4) Use cable fastener to bundle and fix the cable.
(3) Low Voltage Connections
Low voltage wiring is to be copper conductors. A minimum of 18AWG must be
used for installations up to 50’ and 16AWG for installations over 50’.
1) Remove the Electric Box Cover of the unit.
2) Pass the signal cable of the wire controller though rubber ring.
3) Connect the signal cable to terminals according to wiring diagram.
4) Use cable fastener to bundle and fix the cable.
Caution:
Take great care when carrying out the following connections, so as to avoid
malfunction of the air-conditioning unit because of electromagnetic interference.
①. The signal line of the wire controller must be separated from the power

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line.
②. In case the unit is installed in a place vulnerable by electromagnetic
interference, it is better to use shielded cable or double-twisted cable as
the signal line of the wire controller.
Warning:
The NULL LINE of power input MUST be connected to the “N” section of the
terminal board!
A WRONG CONNECTION will cause the DAMAGE of unit!
5.4 Wiring Diagram
Breaker
POWER
380~415V
3PH
50 / 60Hz
Wired Controller
L1
L2
L3
N
PE
1
2
L1
L2
L3
N
PE
①
6 Trial Run
Switch on power supply and press the ON/OFF button to start operation.

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7 Troubleshooting
If your air-conditioning unit suffers from abnormal operation or failure, please
first check the following points before repair
Failure
Possible cause
Solution
The unit can
not be stared.
The power supply does not connect or improper
phase sequence.
Connect the power supply
or change two random
phase.
Electrical leakage of air-conditioning unit causes
tripping of leakage switch.
Contact the nearest service
center.
The voltage is too low.
Contact the dealer.
The control loop has failure.
Contact the nearest service
center.
The unit
operates for a
while and then
stops.
Air outlet port or intake port of the unit is blocked.
Move the obstacles.
There is obstacle in front of the condenser.
Move the obstacles.
The control loop is abnormal.
Contact the nearest service
center.
Poor cooling
effect.
Air filter is dirty.
Clean air filter.
Air outlet port or intake port of indoor unit or
outdoor unit is blocked.
Move the obstacles.
Too many persons or a heat source in the Room.
If possible, clear heat
sources.
Doors or windows are open.
Close windows and doors.
Refrigerant leakage.
Contact the nearest service
center.
Some model unit has a High Pressure Switch
which is welded on discharge pipe. When the
switch goes into effect, the power supply of
compressor will be shut off.
Find and manual reset the
High Pressure. Switch
which is welded on
discharge pipe.
Note: After carrying out the check of the above items and taking relevant
measures to solve the problems found but the air-conditioning unit still does not
function well, please stop the operation of the unit immediately and contact the
nearest service center. Only ask professional serviceman to check and repair the
unit.

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8 Unit Function
8.1 Setting of Double Indoor Room Sensors
This series of Rooftop Packaged Unit has two indoor room sensors. One is
located at the air intake of the unit and the other one is located inside the wire
controller.
User can select one from the two indoor room sensors on the basis of the
engineering requirement.
(Refer to the section of wire controller instructions for detailed operation.)
8.2 Checking of Outdoor Ambient Temperature
The outdoor ambient temperature can be checked on the wire controller for the
convenience of users before going out.
(Refer to the section of wire controller instructions for detailed operation.)
9 Error Code Meaning
Number
Error code
Error
Remarks
1
E1
Compressor high pressure protection
2
E2
Indoor anti-freeze protection
3
E3
Compressor low pressure protection,
refrigerant lack protection and refrigerant
colleting mode
4
E4
Compressor high discharge temperature
protection
5
E6
Communication error
6
E8
Indoor fan motor error
7
F0
Indoor ambient temperature sensor error
8
F1
Evaporator temperature sensor error
9
F2
Condenser temperature sensor error
10
F3
Outdoor ambient temperature sensor error
11
F4
Discharge temperature sensor error
12
F5
Temperature sensor error of wired controller
13
C5
Capacity code error
14
EE
Outdoor memory chip error
15
PF
Electric box sensor error
16
H3
Compressor overload protection