Gree FGR20Pd/DNa-X User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
Ducted Type Split Air-Conditioner Units(Inverter
Series)
Models:
FGR20Pd/DNa-X
FGR25Pd/DNa-X
FGR30Pd/DNa-X
FGR40Pd/D(2)Na-X

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 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 .......6
2.4 Installation of Air Duct ............................................................8
2.5 Indoor unit static pressure notch adjustment ..........................9
2.6 Installation of Wired Controller .............................................10
2.7 Wiring Work .........................................................................10
3 Installation of Outdoor Unit ............................................ 12
3.1 Dimension of Outdoor Unit and Mounting Hole ....................13
3.2 Installation Space Requirement ...........................................14
3.3 Refrigerant Pipe Connection ................................................14
3.4 Vacuum Pumping, Refrigerant Adding..................................15
3.5 Electric Wiring......................................................................16
4 Check Items after Installation and Test Operation........ 19
4.1 Check Items after Installation ...............................................19
4.2 Test Operation and Debugging.............................................20
5 Common Malfunctions and Troubleshooting................ 28
6 Error Indication ................................................................ 30
7 Maintenance and Care..................................................... 34
7.1 Outdoor Heat Exchanger .....................................................34
7.2 Drain Pipe ............................................................................34
7.3 Notice before Seasonal Use.................................................34

7.4 Maintenance after Seasonal Use .........................................34
7.5 Parts Replacement ..............................................................35
8 After-sales Service........................................................... 35

Ducted Type Split Air-Conditioner Units(Inverter Series)
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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.

Ducted Type Split Air-Conditioner Units(Inverter Series)
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(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 10mA shall 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.
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.

Ducted Type Split Air-Conditioner Units(Inverter Series)
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(1) Below are the outline dimension applicable to indoor units:
a.20/25/30kW
b. 40kW
Fig.1

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Below are dimensions of A,B,C, etc. for different models:
Unit: mm
Model A B
Size of air
supply
Size of air
return
G H I
C
E
D
F
FGR20Pd/DNa-X(I)
1355
632
992
192
1150
326
1315
760
385
FGR25Pd/DNa-X(I)
1563
707
992
192
1350
402
1520
840
450
FGR30Pd/DNa-X(I)
1563
707
962
262
1350
402
1520
840
450
FGR40Pd/D(2)Na-X(I)
1730
760
1054
359
1450
557
1680
900
650
(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, as shown in Fig 3.
Unit: mm
Fig.2 Fig.3
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.

Ducted Type Split Air-Conditioner Units(Inverter Series)
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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.
(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) When the indoor unit is installed, the horizontal detection for the complete
unit must be performed. The unit should be placed horizontally from front
to rear side, while there should be 1-2% slope along the drainage
direction.
Fig.5
(6) Remove the washer locating plate and then tighten the nut on it.
(7) Remove the paper pattern.

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Unit:mm
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 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.

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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

Ducted Type Split Air-Conditioner Units(Inverter Series)
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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.
(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, return-air 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 return-air 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 return-air duct is suggested to be more than 150mm away
from the wall. Add a filter to the return-air opening.
⑤Please consider noise-damping and vibration damping for the design and
construction of air duct. Besides, noise source must be away from people.

Ducted Type Split Air-Conditioner Units(Inverter Series)
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For instance, do not have the return-air opening installed on top of the
user (offices, rest area, etc.).
2.4.1Installation of Air-out Duct
Installation of the rectangular duct.
Fig.10
2.5 Indoor unit static pressure notch adjustment
These can set different static pressure notch by the wired controller.
Please refer to the owner’s manual or wired controller for the setting in details.
Different static pressure notch is for different static pressure. The corresponding
relationship is as below:
Static pressure notch
Static pressure(pa)
01
0
02
30
03
60
04
90
05(Defaulted)
120
06
150
07 180
08
210
09
250

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2.6 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTES!
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.
2.7 Wiring Work
WARNING!
Before obtaining access to terminals, all supply circuits must be disconnected.
(1) Units must be earthed securely, or it may cause electric shock.
(2) Please carefully read the wiring diagram before carry out the wiring work,
incorrect wiring could cause malfunction or even damage the unit.
(3) The unit should be powered by independent circuit and specific socket.
(4) The wiring should be in accordance with related regulations in order to ensure
the units reliable running.
(5) Install circuit breaker for branch circuit according to related regulations and
electrical standards.
(6) Keep cable away from refrigerant pipings, compressor and fan motor.
(7) The communication wires should be separated from power cord and connection
wire between indoor unit.
(8) Adjust the static pressure via wired controller according to site circumstance.
2.7.1 Connection of Wire and Patch Board Terminal
(1) The connection of wire (as shown in fig.13)
1) Strip about 25mm insulation of the wire end by stripping and cutting
tool.
2) Remove the wiring screws on the terminal board.

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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.14)
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.13 Fig.14
2.7.2 Connect Communication Wire of Wired Controller
(1) Open electric box cover of indoor unit.
(2) Let the communication wire go through the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit
wiring board.
(4) Fix the communication wire with wire clip on the electric box.
(5) Wiring instructions of remote receiving light board and wired controller:

Ducted Type Split Air-Conditioner Units(Inverter Series)
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Fig.15
2.7.3 Illuminate for Connection of Wired Controller and Indoor Units
Network
(1) Communication wire of indoor unit and outdoor unit (or indoor unit) is
connected to D1, D2.
(2) Wired controller is connected to H1, H2.
(3) One indoor unit can connect two wired controllers that must be set as
master one and slave one.
3 Installation of Outdoor Unit
NOTES!
Graphics here are only for reference. Please refer to actual products.
Unspecified dimensions are all in mm.

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3.1 Dimension of Outdoor Unit and Mounting Hole
Unit Outline and Installation Dimension:
Fig.16
Unit: mm
Model
A
B
C
D
E
FGR20Pd/DNa-X(O)
940
320
1430
632
350
FGR25Pd/DNa-X(O)
940
460
1615
610
486
FGR30Pd/DNa-X(O)
940
460
1615
610
486

Ducted Type Split Air-Conditioner Units(Inverter Series)
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3.2 Installation Space Requirement
If all sides of the ODU (including the top) are surrounded by walls, process
according to the following requirements for installation space:
Unit:mm
Fig.17
3.3 Refrigerant Pipe Connection
NOTE:Do not loosen the cap of the pipes when connecting the pipes between the
indoor unit and the outdoor unit. Connecting the pipes as soon as possible after
loosening the cap of the pipes to avoid the entering of water and dusk. A metal pipe
should be utilized if a pipe should be installed through a wall.
The connection of the pipes should confirm to the following principles:
Make sure to lessen the length of connecting pipe, the height difference between
the indoor and outdoor unit, and the number of bends, and enlarge the diameter of
bends.
The permitted maximum value of each case:
Height difference between the indoor and outdoor unit
＜30m
Number of bends
＜12
Length of connecting pipes
＜70m
The pipe meld type could be employed for the connection of the pipes between
the indoor and outdoor units.
The pipe joint should be tightly connected when a pipe joint is employed
between two pipes. It is better to use only one connecting pipe if the distance is not
far.

Ducted Type Split Air-Conditioner Units(Inverter Series)
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The pipes should not be shriveled when the pipes are connecting. The bend
diameter should be longer than 200 millimeter. The connecting pipes should not be
extended or curved frequently and the curving process should not be larger than 3
times in the same bending position.
During engineering installation, the connection pipe inside the unit must be
wrapped by insulation sleeve.
3.4 Vacuum Pumping, Refrigerant Adding
3.4.1 Vacuum Pumping
(1) Outdoor unit has been charged with refrigerant before delivery.
Field-installed connection pipe needs to be charged with additional
refrigerant.
(2) Confirm whether outdoor liquid and gas valves are closed.
(3) Use vacuum pump to withdraw the air inside indoor unit and connection
pipe from the outdoor valve, as shown below.
Fig.18
3.4.2 Refrigerant Adding
(1) Length of connection pipe is decided on site. Therefore the amount of
additional refrigerant shall be decided on site according to the dimension
and length of field-installed liquid pipe.
(2) Record the amount of additional refrigerant for convenience of after-sales
service.