Gree GMV-ND50C/A-T GMV-ND22PHS/B-T User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Super High Static Pressure Duct 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

To Users
Thank you for selecting Gree’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, sensoryor 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, whichmay
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 Gree Electric Appliances
Inc. of Zhuhai.

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................................................................................................................. 3
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 .................................................. 9
4.4 Installation ofAir Duct....................................................................................................... 13
4.5 Installation of Wired Controller.......................................................................................... 15
5 Wiring Work.......................................................................................................................16
5.1Connection of Wire and Patch Board Terminal.................................................................. 16
5.2Power 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......................... 18
6 Setting of External Static Pressure....................................................................................20
7 Routine Maintenance.........................................................................................................20
7.1 Cleaning of Filter............................................................................................................... 20
7.2 Maintenance before the Seasonal Use ............................................................................ 20
7.3 Maintenance after the Seasonal Use................................................................................ 20
8 Table of Error Codes for Indoor Unit..................................................................................21
9 Troubleshooting.................................................................................................................21

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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.
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.
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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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 and
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°C.
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.
R410A (R32/125:50/50):2087.5

Multi Variable Air Conditioners Ducted Type Indoor Unit
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2 Product Introduction
2.1 Names of Key Components
Fig 2.1
No.
①
②
③
④
⑤
⑥
⑦
Name
Drain Pipe
Control
box
Pothook
Gas pipe
Liquid pipe
Air-return
Opening
Air Outlet
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(80.6)
19(66.2)
35(95)
24(75.2)
Rated Heating
20(68.0)
15(59.0)
7(44.6)
6(42.8)
3 Preparations for Installation
Note: Product graphics are only for reference. Please refer to actual products. Unspecified
measure unit is mm.
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
1
To be used for connecting the refrigerant
pipe

Multi Variable Air Conditioners Ducted Type Indoor Unit
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No.
Name
Appearance
Q'ty
Usage
4
M10X8 Nut with Washer
4
To be used together with the hanger bolt
for installing the unit.
5
M10 Nut (M10X8.4 Nut)
4
To be used together with the hanger bolt
for installing the unit.
6
M10 Washer (Spring Washer
M10X2.6)
4
To be used together with the hanger bolt
for installing the unit.
7
Insulation
1
To insulate the gas pipe
8
Insulation
1
To insulate the liquid pipe
9
Sponge
2
To insulate the drain pipe
10
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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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/ft.)
Wire size
(mm2/AWG)
Material
Standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250m
(L≤820-1/5ft.)
2×0.75~2×1.25
(2×AWG18~2×A
WG16)
IEC
60227-5
1)Total length of communication
line can't exceed 250m (820-
1/5ft.).
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/ft.) of
Communication
Cable between
Indoor Unit and
Indoor (Outdoor)
Unit
Wire size
(mm2/AWG)
Material
Standard
Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000m
(L≤3280-5/6ft.)
≥2×0.75
(≥2×AWG18)
IEC 60227-5
1)If the wire diameter is enlarged to 2×1
mm2(2×AWG16), the total
communication line length can reach
1500 m (4921-1/4ft.).
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-ND22~160PHS/B-T
220~240V-1ph-50Hz
208~230V-1ph-60Hz
6
1.0
1.0
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

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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°Cambient temperature when laying across plastic pipe. Air switch is D type and used
at 40°C. 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-ND140~160PHS/B-T
1440
500
1580
300
754
1400
700

Multi Variable Air Conditioners Ducted Type Indoor Unit
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4.1.2 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 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.
Fig 4.1.2 Fig 4.1.3
(2) Insert the M10 expansion bolt into the hole and then knock the nail into the bolt, as shown
in fig 4.1.4.
Caution:
The length of bolt depends on the installation height of the unit, bolts are field supplied.
Fig 4.1.5
(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.
(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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig 4.1.6
(7) Remove the washer locating plate and then tighten the nut on it
(8) Remove the paper pattern
Fig 4.1.7
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
(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.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
(1) The drainage pipe should be short and the gradient downwards should be at least 1%~2%
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

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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
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 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.
(2) Tighten the pipe clamp, with the distance between screw nut and hose smaller than 4mm.
①metal clamp(accessory)
②drain hose(accessory)
Fig 4.3.2 Fig 4.3.3
(3) Use sealing plate to make the pipe clamp and hose insulated, as shown in Fig.4.3.3.
①metal clamp(accessory)
②thermal sponge(accessory)
(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.
Fig 4.3.4
(5) If the negative pressure at the outlet of drainage pipe is big, the drainage pipe of indoor
unit must adopt U-trap elbow.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig 4.3.5
(6) Install the trap as shown in following Fig 4.3.6.
Fig 4.3.6
(7) Install one trap for each unit.
(8) Convenience for cleaning trap in the future should be considered when installing it.
(9) The horizontal pipe can be connected to vertical pipe in the same level; please select the
connection way as shown in following fig.
NO1: Connection of drainage pipe joints (Fig4.3.7)
NO2: Connection of downspout elbow (Fig4.3.8)
NO3: Inserting pipe connection (Fig4.3.9)
Fig 4.3.7 Fig 4.3.8 Fig 4.3.9
(10)The installation height of raising pipe for drainage should be lower than 910mm. 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 860mm.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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Fig 4.3.10
(11) 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.
Fig 4.3.11
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.
Fig 4.3.12

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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 ofAir-out Duct
(1) Duct Shape and Size of Air Outlet and Air-return Opening
Fig 4.4.1 Air Outlet
Fig 4.4.2 Air-return Opening

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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-ND90～160PHS/B-T
195
1151
25
264
1360
29
(2) Installation of Air-out Duct
Fig 4.4.3
No.
Name
No.
Name
1
Hanger Rod
5
Static Pressure Box
2
Return Air Duct
6
Filter
3
Canvas Duct
7
Main Supply Air Duct
4
Return Air Inlet
8
Supply Air Outlet
4.4.3 Installation of the ReturnAir 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.
(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

Multi Variable Air Conditioners Ducted Type Indoor Unit
15
maintenance etc., as shown in Fig 4.4.5.
Fig 4.4.5
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
4.4.4 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.

Multi Variable Air Conditioners Ducted Type Indoor Unit
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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.
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 pipings, 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.
5.1Connection 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 plier, 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.
Fig 5.1.1 Fig 5.1.2

Multi Variable Air Conditioners Ducted Type Indoor Unit
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5.2Power Cord Connection
Warning!
①Every unit should be equipped with a circuit breaker for short-circuit and overload
protection.
②During operation, all indoor units connected to the same outdoor unit system must be kept
energized status. Otherwise, the unit can’t operate normally.
Fig 5.2
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L, N,”
(4) Fix the power card with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit (or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as
shown in fig5.3.1.
Fig 5.3.1 Fig 5.3.2
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the most