Cooper & Hunter IBD20NM User manual

Owner`s manual
The Ducted Split Type Air-Conditioning Units(Inverter Series)
Models:
CH-IBD20NM
CH-IBD25NM
CH-IBD30NM
CH-IBD40N(2)M
Thank you for choosing Commercial Air Conditioners, please read this
owner’s manual carefully before operation and retain it for future reference.
BIG DUCT SPLIT UNIT

To Users
Thank you for selecting C&H’s product. Please read this instruction manual carefully before
installing and using the product, so as to master and correctly use the product. In order to guide
you to correctly install and use our product and achieve expected operating effect, we hereby
instruct as below:
(1) 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 responsibility for their safety. Children should be supervised to ensure that they
do not play with the appliance.
(2) In order to ensure reliability of product, the product may consume some power under
stand-by status for maintaining normal communication of system and preheating
refrigerant and lubricant. If the product is not to be used for long, cut off the power supply;
please energize and preheat the unit in advance before reusing it.
(3) Please properly select the model according to actual using environment, otherwise it may
impact the using convenience.
(4) This product has gone through strict inspection and operational test before leaving the
factory. In order to avoid damage due to improper disassembly and inspection, which
may impact the normal operation of unit, please do not disassemble the unit by yourself.
You can contact with the special maintenance center of our company if necessary.
(5) For personal injury or property loss and damage caused by improper operation such as
improper installation and debugging, unnecessary maintenance, violation of related
national laws and rules and industrial standard, and violation of this instruction manual,
etc., we will bear no liability.
(6) When the product is faulted and cannot be operated, please contact with our
maintenance center as soon as possible by providing the following information.
1)Contents of nameplate of product (model, cooling/heating capacity, product No.,
ex-factory date).
2)Malfunction status (specify the situations before and after the error occurs).
(7) All the illustrations and information in the instruction manual are only for reference. In
order to make the product better, we will continuously conduct improvement and
innovation. We have the right to make necessary revision to the product from time to time
due to the reason of sales or production, and reserve the right to revise the contents
without further notice.
(8) The final right to interpret for this instruction manual belongs to Cooper&Hunter
International Corporation, Oregon, USA.
(9) In relation to harmonics need distribution network operator to connect such equipment
locally to the public low-voltage systems.
(10)This appliance can be used by children aged from 8 years and above and persons with

reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.
(11)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.

CONTENTS
1 Safety precautions ............................................................................................................... 1
1.1 Safety Notices (Please be sure to abide ).............................................................................. 1
1.2 Power supply demand............................................................................................................... 1
2 Installation of Indoor Unit.................................................................................................... 2
2.1 Selection proper installation location....................................................................................... 2
2.2 Outline Dimension and Installation Spots............................................................................... 2
2.3 Drainage Pipe Installation and Drainage System Testing.................................................... 4
2.4 Installation of Air Duct................................................................................................................ 6
2.5 Installation of Wired Controller................................................................................................. 7
2.6 Wiring Work................................................................................................................................. 7
3 Installation of Outdoor Unit................................................................................................. 9
3.1 Dimension of Outdoor Unit and Mounting Hole..................................................................... 9
3.2 Installation space requirement............................................................................................... 10
3.3 Refrigerant pipe connection.................................................................................................... 10
3.4 Vacuum Pumping, Refrigerant Adding.................................................................................. 11
3.5 Electric Wiring........................................................................................................................... 12
4 Check Items after Installation and Test Operation........................................................ 15
4.1 Check Items after Installation................................................................................................. 15
4.2 Test operation and debugging................................................................................................ 15
5 Common Malfunctions and Troubleshooting ................................................................. 17
6 Error Indication ................................................................................................................... 19
7 Maintenance and Care...................................................................................................... 21
7.1 Outdoor Heat Exchanger........................................................................................................ 21
7.2 Drain Pipe.................................................................................................................................. 21
7.3 Notice before Seasonal Use................................................................................................... 21
7.4 Maintenance after Seasonal Use........................................................................................... 22
7.5 Parts Replacement................................................................................................................... 22
8 After-sales Service............................................................................................................. 22

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual
1
1 Safety precautions
1.1 Safety Notices (Please be sure to abide )
Warning: If not abide strictly, it may cause severe damage to the unit or the people.
Note: If not abide strictly, it may cause slight or medium damage to the unit or the
people.
This sign indicates that the operation must be prohibited. Improper operation may
cause severe damage or death to people.
This sign indicates that the items must be observed. Improper operation may cause
damage to people or property.
This marking indicates that this product should not be disposed with other household
wastes throughout the EU.To prevent possible harm to the environment or human health
from uncontrolled waste disposal,recycle it responsibly to promote the sustainable reuse of
material resources.To return your used device,please use the return and collection
systems or contact the retailer where the product was purchased.They can take this
product for environmental safe recycling.
WARNING!
This product can’t be installed at corrosive , inflammable or explosive environment or the
place with special requirements, such as kitchen or washing room. Otherwise, it will affect
the normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for above special places, please adopt special air conditioner with
anti-corrosive or anti-explosion function .
1.2 Power supply demand
(1) Provided sufficient capacity of power supply and the cross area of electrical wires.
(2) Confirm the reliable earth connection, and the earth wire should be connected to special
device of the building. Never connect the earth wire to the gas pipe, water pipe, the earth
wires of telephone and lighting rod.
(3) Make sure that the wiring is done by the qualified technicians according to the relevant
regulations.
(4) In fixed circuit, there must be electricity leakage protection switch of enough power
capacity and air switch with enough space.
(5) An all-pole disconnection device which has at least 3mm separation distance in all pole
and a residual current device(RCD)with the rating of above 10mAshall be incorporated in
the fixed wiring according to the national rule
(6) The appliance shall be installed in accordance with national wiring regulations
(7) The temperature of refrigerant circuit will be high, please keep the interconnection cable
away from the copper tube.

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual
2
2 Installation of Indoor Unit
2.1 Selection proper installation location
(1) Avoid the direct sunshine.
(2) Make sure the suspension bracket is strong enough to withstand the unit’s weight.
(3) Select a place for easily connection of the drain hose.
(4) The inlet and outlet ports should not be obstructed so that the indoor air circulates well.
(5) Make sure the convenient connect of the connection pipes.
(6) Selection a location that is far away from the combustible or explosive material and gas.
(7) Selection a location that is far away from the cankerous material, fog, dusk or moist.
2.2 Outline Dimension and Installation Spots
Equip with an inspection hatch after lifting the unit. For the convenience of maintenance, the
service port should be on one side of the electric box and below unit’s lower level.
(1) Below are the outline dimension applicable to indoor units
b.40kW
Fig. 1

The DuctedS plit T ype Air-ConditioningUnit s(Inverter Series) InstallationandOperationManual
3
Below are dimensions of A, B, C, etc. for different models:
Unit: mm
Model
a
b
c
d
e
f
CH-IBD20NM(I)
1334
632
990
1150
192
363
CH-IBD25NM(I)
1541
705
980
1350
270
420
CH-IBD30NM(I)
1541
705
980
1350
270
420
CH-IBD40N(2)M(I)
1730
760
1054
1450
360
560
(2) Drill bolt holes and install bolts
1) Stick the reference cardboard on the installation position; drill 4 holes according to the
hole site on the cardboard as shown in Fig 2; diameter of drilling hole is according to
the diameter of expansion bolt and the depth is 60-70mm(2-3/8~2-3/4 in.), as shown
in Fig 3.
Fig2 Fig3
2) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as
shown in Fig 4.
NOTES
The length of bolt depends on the installation height of the unit, bolts are field supplied.
Fig 4
(3) Install the indoor unit temporarily
Assemble suspension bolt on the expansion bolt, attach the hanger bracket to the suspension
bolt. Be sure to fix it securely by using a nut and washer from upper and lower sides of the hanger
bracket. The washer fixing plate will prevent the washer from falling.

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual
4
(4) The usage of paper pattern
Refer to paper pattern of installation for ceiling opening dimension. The center of ceiling
opening is indicated on the paper pattern. Fix the paper pattern to the unit with 4 screws and fix the
corners of the waterspout at the drainage pipe by screws.
(5) Adjust the unit to the right position.
(6) Check the level of the unit
The indoor unit is equipped with build-in water pump and float switch, verify the levelness of 4
directions by level gauge or vinyl tube (filled with water) respectively.
Fig.5
(7) Remove the washer locating plate and then tighten the nut on it.
(8) Remove the paper pattern.
Fig.6
2.3 Drainage Pipe Installation and Drainage System Testing
2.3.1 Notice for Installation of Drain Pipe
(1) The drainage pipe should be short and the gradient downwards should be at least
1%~2% in order to drain condensation water smoothly.
(2) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe
joint.
(3) Install drainage pipe according to the following fig and arrange insulation to the drainage
pipe. Improper installation may lead to water leakage and damp the furniture and other

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual
5
things in the room.
(4) You can buy normal hard PVC pipe used as the drainage pipe. During connection, insert
the end of PVC pipe into the drainage hole and then tighten it with drainage hole and wire
binder. Can’t connect the drainage hole and drainage hole with glue.
(5) When the drainage pipelines are used for several units, the position of pipeline should be
about 100mm (4 in.) lower than the drainage port of each unit. In this case, thicker pipes
should be applied.
Fig.7
2.3.2 Drainage pipe installation
For easy drainage of the condensation water, the drainage pipe should be installed with a
downward gradient. To avoid the condensation, the connection pipe joint should be insulated with
thermal insulation material.A water seal should be employed as shown in Fig.8 and the height of
the water seal could be determined by the pressure of the drain hose.
Drain hose is in negative pressure state:A = B≥P/10+20 (mm).
Drain hose is in positive pressure state:A≥30mm，B≥P/10+20 (mm).
Note: P is the absolute pressure of the drain hose position, Pa.
Fig.8
2.3.3 Test of Drainage System
(1) Inject approximately 1L purified water to drain pan from air vent, ensure that not to splash
the water over the electrical components (e.g. water pump. etc.).
(2) During the test, please carefully check the drainage joint, make sure no any leakage
occur.

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual
6
(3) It is strongly recommend to do the drain test before ceiling decoration.
Fig.9
2.4 Installation of Air Duct
NOTES
①There should be insulating layer on air-out duct, air-return duct and fresh air duct to avoid
heat loss and moisture. Adhere a nail on the air duct and then add thermal sponge with a
layer of tin. Fasten it with a nail cover and then seal the junction with tin tapes. You can
also use other materials that have good insulation quality.
②Each air-out duct and air-return duct should be fixed on a pre-made board with iron frame.
The junction of air duct should be well-sealed in order to prevent air leakage.
③The design and construction of air duct should comply with national requirements.
④The edge of air-return duct is suggested to be more than 150mm(5-7/8 in.) away from the
wall. Add a filter to the air-return opening.
⑤Please consider noise-damping and vibration damping for the design and construction of
air duct. Besides, noise source must be away from people. For instance, do not have the
air-return opening installed on top of the user (Offices, rest area, etc.).
2.4.1 Installation of Air-out Duct
(1) Installation of the Rectangular Duct
Fig.10
No.
Name
No.
Name
1
Hanger Rod
5
Static Pressure Box
2
Return Air Duct
6
Main Supply Air Duct
3
Canvas Duct
7
Supply Air Outlet
4
Return Air Inlet