Gree GMV-ND180PHS/B-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Multi Variable Air Conditioners
Ducted Type Indoor Unit
Models:
GMV-ND22PHS/B-T GMV-ND25PHS/B-T GMV-ND28PHS/B-T GMV-ND32PHS/B-T
GMV-ND36PHS/B-T GMV-ND40PHS/B-T GMV-ND45PHS/B-T GMV-ND50PHS/B-T
GMV-ND56PHS/B-T GMV-ND63PHS/B-T GMV-ND71PHS/B-T GMV-ND80PHS/B-T
GMV-ND90PHS/B-T GMV-ND100PHS/B-T GMV-ND112PHS/B-T GMV-ND125PHS/B-T
GMV-ND140PHS/B-T GMV-ND160PHS/B-T GMV-ND180PHS/B-T

To Users
Thank you for selecting Gree 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 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.
(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 can’t be installed at corrosive, inflammable or explosive environment or the
place with special requirements, such as kitchen. 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.
(5) If the product needs to be installed, moved or maintained, please contact our designated
dealer or local service center for professional support. Users should not disassemble or
maintain the unit by themselves, otherwise it may cause relative damage, and our company
will bear no responsibilities.
(6) 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. If there
is adjustment in the product, please subject to actual product.

Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is caused by the
following reasons:
(1) Damage the product due to improper use or misuse of the product;
(2) Alter, change, maintain or use the product with other equipment without abiding by the
instruction manual of manufacturer;
(3) After verification, the defect of product is directly caused by corrosive gas;
(4) After verification, defects are due to improper operation during transportation of product;
(5) Operate, repair, maintain the unit without abiding by instruction manual or related regulations;
(6) After verification, the problem or dispute is caused by the quality specification or performance
of parts and components that produced by other manufacturers;
(7) The damage is caused by natural calamities, bad using environment or force majeure.

Contents
1 Safety Notices (Please be sure to abide) ................................................................. 1
2 Product Introduction ................................................................................................. 3
2.1 Names of Key Components.................................................................................................3
2.2 Rated Working Condition.....................................................................................................3
3 Preparations for Installation ..................................................................................... 3
3.1 Standard Fittings .................................................................................................................4
3.2 Location for Installation........................................................................................................4
3.3 Requirements for Communication Line ...............................................................................5
3.4 Wiring Requirements ...........................................................................................................6
4 Installation Instructions ............................................................................................ 7
4.1 Installation of Indoor Unit.....................................................................................................7
4.2 Refrigerant Pipe Connection ...............................................................................................9
4.3 Drainage Pipe Installation and Drainage System Testing..................................................10
4.4 Installation of Air Duct........................................................................................................13
4.5 Installation of Wired Controller ..........................................................................................15
5 Wiring Work.............................................................................................................. 15
5.1 Connection of Wire and Patch Board Terminal..................................................................16
5.2 Power Cord Connection ....................................................................................................17
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or indoor unit)
.................................................................................................................................................17
5.4 Connect Communication Wire of Wired Controller............................................................18
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network ..........................19
6 Setting of External Static Pressure ........................................................................ 21
7 Routine Maintenance............................................................................................... 21
7.1 Cleaning of Filter ...............................................................................................................21
7.2 Maintenance before the Seasonal Use .............................................................................21
7.3 Maintenance after the Seasonal Use ................................................................................22
8 Table of Error Codes for Indoor Unit...................................................................... 22
9 Troubleshooting....................................................................................................... 23

Multi Variable Air Conditioners Ducted Type Indoor Unit
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.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive environment or the
place with special requirements, such as kitche
n. 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.
This Multi
VRF System shall only be connected to an appliance suitable for the same
refrigerant.
All units in Manual Cover is a partial unit, complying with partial unit of IEC 60335-2-40:2018,
and must only be connected to other units that have been confirmed
as complying to
corresponding partial unit requirements of this international standard.
The electrical interface shall comply with electrical security requirement,current shall be
referred to the table of “Dimension of power cord and capacity of air switch” in Section 3.4,
and safety class of construction is I.
Please install the unit according
to instructions in this manual.
Read this manual carefully
before starting up or checking
the machine.
Installation should be performed
by dealer or qualified
technicians. Do not install the
product by yourself. Improper
installation may result in water
leakage, electric shock or fire
hazard.
Make sure the local power
supply is in accordance with
units before installation, and
check the power supply
carefully.
This air conditioner must be
properly grounded through the
receptacle to avoid electric
shock. The grounding wire
shouldn't be connected with gas
pipe, water pipe, lightning
arrester or telephone line.
Please use specialized
accessories or parts to carry out
installation, or water leakage,
electric shock, fire hazard may
resulted.
R410A refrigerant can produce
poisonous gas once it meets
fire, so please ventilate the room
immediately if refrigerant leaks
out during installation.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Diameter of power cord must be
large enough. Damaged power
cord and connecting wire must
be replaced by specialized
electric cable.
After the power cord is
connected, please install the
cover of electric box to avoid
danger.
Nitrogen must be charged
according to technical
requirements.
Short circuit is forbidden. Do not
cancel the pressure switch in
case the unit may be damaged.
For units with wired controller,
do not connect power supply
until the wired controller is well
installed. Otherwise, the wired
controller cannot be used.
When the installation is finished,
please check and make sure the
drain pipe, pipeline and electric
wire are all well connected in
order to avoid water leakage,
refrigerant leakage, electric
shock or fire hazard.
Do not extend fingers or objects
into air outlet or air return grille.
If you use gas heater or
petroleum heater in the same
room, please open the door or
window to maintain good air
circulation in case the room may
lack of oxygen.
Never start or stop the air
conditioner by inserting or
removing the power cord.
Do not turn off the air conditioner
until it runs for at least 5
minutes. Otherwise, oil-return of
the compressor will be affected.
Children are not allowed to
operate the air conditioner. Do not operate the air conditioner with wet hands.
Please turn the unit off and
unplug your air conditioner
before cleaning. Otherwise, it
may cause electric shock or
personal injury.
Do not spray water on the air
conditioner or it will cause
malfunction or electric shock.
Do not expose the air
conditioner directly to water or
place it in a damp or corrosive
environment.
Connect power supply 8 hours
before operation. Do not
disconnect power if you want to
stop the unit in a short period of
time, e.g. in one night (This is for
protecting the compressor).
Volatile liquid like thinner or
gasoline will damage the
appearance of air conditioner.
Please use soft dry cloth or wet
cloth with mild detergent to clean
the outer case of air conditioner.
During Cooling mode, indoor
temperature should not be set
too low. Keep the difference
between indoor temp and
outdoor temp within 5℃.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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If abnormal condition occurs
(e.g. unpleasant smell), please
turn off the unit at once and
disconnect power supply. Then
contact GREE service center. If
the air conditioner continues to
operate despite of abnormal
condition, the unit may be
damaged and it may cause
electric shock or fire hazard).
Do not repair the air conditioner
by yourself. Improper repair will
cause electric shock or fire
hazard. Please contact GREE
service center and have it
repaired by professional
technicians.
Any personal injury or property loss caused by improper installation, improper debug,
unnecessary repair or not following the instructions of this manual should not be the responsibility of
Gree Electric Appliances, Inc. of Zhuhai.
Correct Disposal of this product
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.
2 Product Introduction
2.1 Names of Key Components
Fig.2.1
2.2 Rated Working Condition
—Indoor Side Condition Outdoor Side Condition
Dry Bulb Temp(℃) Wet Bulb Temp(℃) Dry Bulb Temp(℃) Wet Bulb Temp(℃)
Rated Cooling 27 19 35 24
Rated Heating
20
15
7
6
3 Preparations for Installation
NOTE! Product graphics are only for reference. Please refer to actual products. Unspecified
measure unit is mm.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Appearance
Q'ty
Usage
1 Wired Controller 1 To control the indoor unit
2
Drain Hose Assembly
1
To connect with the hard PVC drain pipe
3 Special Nut
2 GMV-ND22~50PHS/B-T
1 GMV-ND56~180PHS/B-T
4
Corrugated pipe
1
GMV-ND56~180PHS/B-T
5 M10×8 Nut with Washer 4 To be used together with the hanger bolt
for installing the unit
6 M10 Nut (M10×8.4 Nut) 4 To be used together with the hanger bolt
for installing the unit
7 M10 Washer (Spring
Washer M10×2.6)
4 To be used together with the hanger bolt
for installing the unit
8 Insulation 1 To insulate the gas pipe
9 Insulation 1 To insulate the liquid pipe
10 Sponge 2 To insulate the drain pipe
11
Fastener
8
To fasten the sponge
NOTE: User can purchase remote controller and receiver otherwise by himself.
3.2 Location for Installation
(1) The appliance shall not be installed in the laundry.
(2) The top holder must be strong enough to support unit’s weight.
(3) Drain pipe can drain water out easily.
(4) There is no obstacle at inlet or outlet. Please ensure good air circulation.
(5) In order to make sure the space for maintenance, please install the indoor unit according to
the dimension described below.
(6) Keep the unit away from heating source, inflammable gas or smoke.
(7) This is a concealed ceiling type unit.
(8) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m from the TV
set and radio. Otherwise, these electrical appliances may have image interference and noise
(Even if the distance is 1m, when there is strong electric wave, noise may still occur)

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Unit: mm
Fig.3.2
NOTES!
①Installation of the unit must be in accordance with National Electric Codes and local
regulations.
②Improper installation will affect unit’s performance, so do not install the unit by yourself.
Please contact local dealer to arrange professional technicians for the installation.
③Do not connect power until all installation work is finished.
3.3 Requirements for Communication Line
CAUTION!
If air conditioner used under strong electronic-magnetic interference circumstance, STP (shielded
twisted pair) communication cable must be adopted.
3.3.1 Select Communication Line for Indoor Unit and Wired Controller
Fig.3.3.1

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Material type
Total length of
communication line
between indoor unit and
wired controller L (m)
Wire size
(mm²)
Material
Standard Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250 2×0.75~2×1.
25
IEC
60227-5
1) Total length of communication
line can't exceed 250m.
2) The cord shall be Circular cord
(the cores shall be twisted
together).
3) If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to
use shielded wire.
3.3.2 Select Communication Line for Indoor Unit and Indoor Unit (Outdoor Unit)
Fig.3.3.2
Material Type
Total Length L (m) of
Communication Cable
between Indoor Unit
and Indoor (Outdoor)
Unit
Wire size
(mm²)
Material
Standard Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000 ≥2×0.75 IEC 60227-5
1) If the wire diameter is enlarged to 2×1
mm², the total communication line length
can reach 1500 m.
2)
The cord shall be Circular cord (the cores
shall be twisted together).
3) If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
3.4 Wiring Requirements
(1) Power Cord Size and Air Switch Capacity
Model Power Cord Size
Air Switch
Capacity
(A)
Minimum Sectional
Area of Ground Wire
(mm²)
Minimum Sectional
Area of Power Cord
(mm²)
GMV-ND22~180PHS/B-T 220~240V-1ph-50Hz
208~230V-1ph-60Hz
6 1.0 1.0

Multi Variable Air Conditioners Ducted Type Indoor Unit
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NOTES!
①Use copper wire only as unit’s power cord. Operating temperature should be within its rated
value.
②If the power cord is more than 15m long, please increase properly the sectional area of power
cord to avoid overload, which may cause accident.
③Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at
40℃ambient temperature when laying across plastic pipe. Air switch is D type and used at
40℃. If actual installation condition varies, please lower the capacity appropriately according
to the specifications of power cord and air switch provided by manufacturer.
④If 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.
(2) Install cut-off device near the unit. The minimum distance between each stage of cut-off
device should be 3mm (The same for both indoor unit and outdoor unit).
4 Installation Instructions
4.1 Installation of Indoor Unit
4.1.1 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.
Fig.4.1.1
Below are dimensions of A, B, C, etc. for different models:
Unit: mm
Model
A
B
C
D
E
F
G
GMV-ND22~50PHS/B-T
740
500
830
300
754
700
700
GMV-ND56~80PHS/B-T 1040 500 1130 300 754 1000 700
GMV-ND90~125PHS/B-T
1440
500
1530
300
754
1400
700
GMV-ND140~180PHS/B-T
1440
500
1580
300
754
1400
700

Multi Variable Air Conditioners Ducted Type Indoor Unit
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4.1.2 Suspend the indoor unit
(1) 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.4.1.2; diameter of drilling hole is according to the
diameter of expansion bolt and the depth is 60-70mm, as shown in Fig.4.1.3.
Unit:mm
Fig.4.1.2Fig.4.1.3
1) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as shown
in Fig.4.1.4, and then remove the paper pattern.
CAUTION!
The length of bolt depends on the installation height of the unit, bolts are field supplied.
Fig.4.1.4
(2) 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.
Unit: mm
Fig.4.1.5

Multi Variable Air Conditioners Ducted Type Indoor Unit
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NOTES!
①Before operation, please prepare all pipelines (connection pipe, drainage hose) and wires
(connection wire for wired controller, connection wire for indoor unit).
②When drilling holes on ceiling (air return outlet or air outlet), you can need to reinforce the
ceiling to prevent vibration. For details, please consult user or builder.
③If the strength of the ceiling is not good, please install a beam bracket, and then put the unit
on the beam bracket.
(3) Adjust the unit to the right position
(4) Check the level of the unit
After the indoor unit is installed, remember to check the horizontal status of the whole unit. It
should be horizontal from front to back and slant 1% from left to right, following the drainage direction.
Fig.4.1.6
(5) Remove the washer locating plate and then tighten the nut on it
4.2 Refrigerant Pipe Connection
(1) Aim the flaring port of copper pipe at the center of screwed joint and then tighten the flaring
nut with hand as shown in Fig.4.2.
(2) Tighten the flaring nut with torque wrench.
Fig.4.2
Torque for tightening nut
Pipe diameter (mm)
Torque (N·m)
Φ6.35
15~30
Φ9.52
35~40
Φ12.7
45~50
Φ15.9
60~65
Φ19.05
70~75
(3) Use pipe bend when bending the pipe and the bending angle should not be too small.
(4) Wrap the connection pipe and joint with sponge and then tie them firmly with tape.

Multi Variable Air Conditioners Ducted Type Indoor Unit
10
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
(1) It is not allowed to connect the condensate drain pipe into waste pipe or other pipelines which
are likely to produce corrosive or peculiar smell to prevent the smell from entering indoors or
corrupt the unit.
(2) It is not allowed to connect the condensate drain pipe into rain pipe to prevent rain water from
pouring in and cause property loss or personal injury.
(3) Condensate drain pipe should be connected into special drain system for air conditioner.
(4) The drainage pipe should be short and the gradient downwards should be at least 1%~2%
in order to drain condensation water smoothly.
(5) The diameter of drainage hose should be bigger or equal to the diameter of drainage pipe
joint.
(6) 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 things in
the room.
(7) 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.
(8) When the drainage pipelines are used for several units, the position of pipeline should be
about 100mm lower than the drainage port of each unit. In this case, thicker pipes should be
applied.
Fig.4.3.1
4.3.2 Drainage Pipe Installation
(1) Insert the drain hose into the drain hole and tighten it with tapes, as shown in Fig.4.3.2. Model
with water pump will be provided with drain hose, while other models please prepare the
drain hose by yourself.
(2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than 4mm.
Fig.4.3.2

Multi Variable Air Conditioners Ducted Type Indoor Unit
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(3) Use sealing plate to make the pipe clamp and hose insulated, as shown in Fig.4.3.3.
Unit:mm
Fig.4.3.3
(4) When connecting several drain pipes, follow the instruction as indicated in Fig.4.3.4. Choose
the drain collecting pipe that matches with unit capacity.
Unit:mm
Fig.4.3.4
(5) Install the trap as shown in following Fig.4.3.5.
Fig.4.3.5
(6) Install one trap for each unit.
(7) Convenience for cleaning trap in the future should be considered when installing it.
(8) The horizontal pipe can be connected to vertical pipe in the same level; please select the
connection way as shown in following fig.
No.1: Connection of drainage pipe joints (Fig.4.3.6)
No.2: Connection of downspout elbow (Fig.4.3.7)
No.3: Inserting pipe connection (Fig.4.3.8)
Fig.4.3.6Fig.4.3.7Fig.4.3.8

Multi Variable Air Conditioners Ducted Type Indoor Unit
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(9) The installation height of raising pipe for drainage should be lower than B. The gradient from
raising pipe towards drainage direction should be at least 1%~2%. If the raising pipe is
vertical with the unit, the raising height should be less than C.
Unit: mm
Fig.4.3.9
Model
A (mm)
B (mm)
C (mm)
GMV-ND22~180PHS/B-T 90 1110 1060
(10) Drain pipes should have a downward slope of at least 1%~2%, in order to prevent pipes from
sagging, install hanger bracket at intervals of 1000~1500mm.
Unit: mm
Fig.4.3.10
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished.
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.).
1) In case of commissioning finished, please energize the IDUs and switch to cooling or dry
mode, meanwhile, the water pump operates, you can check the draining through the
transparent part of drain socket.
2) If communication wire is not connected, communication malfunction “C0” will occur after
60s of energizing. In this case, the water pump operates automatically. Check if the water
pump drains normally drains normally through drainage port. The water pump will stop
automatically after running for 10min.
(2) During the test, please carefully check the drainage joint, make sure no any leakage occur.
(3) It is strongly recommend to do the drain test before ceiling decoration.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig.4.3.11
4.4 Installation of Air Duct
CAUTION!
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 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.).
4.4.1 Installation of Air-out Duct
(1) Duct Shape and Size of Air Outlet and Air-return Opening
Fig.4.4.1 Air Outlet

Multi Variable Air Conditioners Ducted Type Indoor Unit
14
Fig.4.4.2 Air-return Opening
Unit: mm
Model
Size of Air Outlet
Size of Air-return Opening
A
B
C
D
E
F
GMV-ND22~50PHS/B-T
195
451
25
264
660
29
GMV-ND56~80PHS/B-T 195 751 25 264 960 29
GMV-ND90~180PHS/B-T
195
1151
25
264
1360
29
(2) Installation of Air-out Duct
Fig.4.4.3
4.4.2 Installation of the Return Air Duct
(1) The default installation location of the rectangular flange is at the back and the return air
cover plate is at the bottom, as shown in Fig.4.4.4.
Fig.4.4.4
(2) If the bottom return air is desired, just change the place of the rectangular flange and the
return air cover plate.
(3) Connect one end of the return air duct to the return air outlet of the unit by rivets and the
other to the return air louver. For the sake of the convenience to freely adjust the height, a
cutting of canvas duct will be helpful, which can be reinforced and folded by 8# iron wire.

Multi Variable Air Conditioners Ducted Type Indoor Unit
15
(4) More noise is likely to be produced in the bottom return air mode than the rear return air
mode, so it is suggestive to install a silencer and a static pressure box to minimize the noise.
(5) The installation method can be chosen with considering the conditions of the building and
maintenance etc., as shown in Fig.4.4.5.
Fig.4.4.5
4.4.3 Installation of the Fresh Air Pipe
(1) When the fresh air pipe is needed to be connected, cut the fresh air baffle as Fig.4.4.6. Plug
up the gap of the fresh air baffle by sponge if the fresh air duct is not be used.
(2) Install the round flange so that the fresh air duct can be connected as Fig.4.4.7.
(3) Sealing and heat preservation should be done for both the air pipe and round flange pipe.
(4) Fresh air should be treated via the air filter.
Fig.4.4.6 Fig.4.4.7
4.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTE! When installation is finished, the unit must be tested and debugged before operation.
Please refer to Instruction Manual of ODU for auto addressing and debugging details.
5 Wiring Work
WARNING!
Before obtaining access to terminals, all supply circuits must be disconnected.
NOTES!
①Units must be earthed securely, or it may cause electric shock.
②Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring
could cause malfunction or even damage the unit.
③The unit should be powered by independent circuit and specific socket.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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④The wiring should be in accordance with related regulations in order to ensure the units
reliable running.
⑤Install circuit breaker for branch circuit according to related regulations and electrical
standards.
⑥Keep cable away from refrigerant piping, compressor and fan motor.
⑦The communication wires should be separated from power cord and connection wire
between indoor unit and outdoor unit.
⑧Adjust the static pressure via wired controller according to site circumstance.
5.1 Connection of Wire and Patch Board Terminal
(1) The connection of wire (as shown in Fig.5.1.1)
1) Strip about 25mm insulation of the wire end by stripping and cutting tool.
2) Remove the wiring screws on the terminal board.
3) Shape the tail of wire into ring by needle nose pliers, and keep the gauge of ring in
accordance with screw.
4) Use the screwdriver for tightening the terminal.
(2) The connection of stranded wire (as shown in Fig.5.1.2)
1) Strip about 10mm insulation of the end of stranded wire by stripping and cutting tool.
2) Loosen the wiring screws on terminal board.
3) Insert the wire into the ring tongue terminal and tighten by crimping tool.
4) Use the screwdriver for tightening the terminal.
Unit: mm
Fig.5.1.1 Fig.5.1.2