User manual | INSTALLATION AND OPERATION MANUAL FOR AHU

INSTALLATION AND OPERATION MANUAL
FOR AHU-KIT UNIT
Owner's Manual
Air Conditioners
Models：
GMV-N140U/A-T
GMV-N280U/A-T
GMV-N560U/A-T
Thank you for choosing Air Conditioners, please read this owner’s manual carefully before
operation and retain it for future reference.
Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
(1) For the safe operation of this unit, please read and follow the instructions carefully.
(2) During operation, total capacity of indoor units should not exceed the total capacity of
outdoor units. Otherwise, poor effect of cooling or heating may result.
(3) Direct operators or maintainers should well keep this manual.
(4) If this unit fails to operate normally, please contact our service center as soon as possible
and provide the following information:
Content on the nameplate (model number, cooling capacity, production code, ex-factory
date).
Malfunction details (before and after the malfunction occurs).
(5) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to
prevent units from being damaged or operating normally because of improper
disassembly, please do not disassemble the unit by yourself. If you need to disassemble
and check units, please contact our service center. We will send specialists to guide the
disassembly.
(6) Do only use this system in combination with a field supplied air handling unit. Do not
connect this system to other appliances.
(7) The outdoor unit and the air handling unit can both influence the overall performance of
the unit, please be sure to select appropriate outdoor unit, air handling unit and AHU-KIT
unit according to actually apply requirements.
(8) This equipment is not designed for year-round cooling applications with low indoor
humidity conditions, such as Electronic Data Processing rooms.
(9) All graphics in this manual is only for your reference. For sales or production reasons,
these graphics are subject to change by manufacturer without prior notice.
User Notice
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.
Disposal
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.
Contents
1 Safety Precautions ............................................................................................... 1
2 Product Introduction ............................................................................................. 3
2.1 Names of Key Components........................................................................................ 3
2.2 Overall System Connection Diagram ......................................................................... 3
3 Preparations for Installation ................................................................................. 4
3.1 Before Installation....................................................................................................... 4
3.2 Standard Fittings ........................................................................................................ 4
3.3 Selecting the Air Handling Unit ................................................................................... 5
3.4 Selecting the AHU-KIT Unit ........................................................................................ 5
3.5 Location for Installation .............................................................................................. 6
3.6 Requirements for Communication Wire ...................................................................... 7
3.7 Wiring Requirements .................................................................................................. 8
4 Installation Instructions......................................................................................... 9
4.1 Unit Dimensions and Maintenance Space .................................................................. 9
4.2 Piping Installation ..................................................................................................... 11
4.3 EXV Installation ........................................................................................................ 13
4.4 Installation of the Control Box................................................................................... 14
4.5 Installation of the Thermistors .................................................................................. 16
4.6 Installation of the EXV Cable .................................................................................... 18
4.7 Installation of Wired Controller ................................................................................. 19
5 Wire Connection .................................................................................................19
5.1 Connect Cables and Terminals of Wiring Board ....................................................... 20
5.2 Power Cord Connection ........................................................................................... 20
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit (or Indoor
Unit) ....................................................................................................................................... 21
5.4 Connect Communication Wire of Wired Controller ................................................... 21
5.5 Illuminate for Connection of Wired Controller and Indoor Units (AHU-KIT) Network 22
6 Operation and Maintenance ................................................................................24
6.1 Before Operation ...................................................................................................... 24
6.2 Test Operation .......................................................................................................... 24
6.3 Routine Maintenance ............................................................................................... 24
6.4 Disposal Requirements ............................................................................................ 25
7 Table of Error Codes for Indoor Unit....................................................................25
8 Troubleshooting ..................................................................................................26
OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
1 Safety Precautions
Means items that must be forbidden! Otherwise, it may lead to personal injury or death or
serious damage.
Means items that must be followed! Otherwise, it may lead to personal injury or property
loss.
Please install the unit
Installation should be performed by
according to instructions in
dealer or qualified technicians. Do
this manual. Read this
not install the product by yourself.
manual carefully before
Improper installation may result in
starting up or checking the
water leakage, electric shock or fire
machine.
hazard.
When the installation is finished,
Make sure the local power
please check and make sure the
supply is in accordance with
drain pipe, pipeline and electric
units before installation, and
wire are all well connected in order
check the power supply
to avoid water leakage, refrigerant
carefully.
leakage, electric shock or fire
hazard.
Please use specialized
R410A refrigerant can produce
accessories or parts to carry
poisonous gas once it meets fire,
out installation, or water
so please ventilate the room
leakage, electric shock, fire
immediately if refrigerant leaks out
hazard may resulted.
during installation.
Diameter of power cord must
be large enough. Damaged
After the power cord is connected,
power cord and connecting
please install the cover of electric
wire must be replaced by
box to avoid danger.
specialized electric cable.
During Cooling mode, indoor
Nitrogen must be charged
temperature should not be set too
according to technical
low. Keep the difference between
requirements.
indoor temp and outdoor temp
within 5°C.
For units with wired controller,
Volatile liquid like thinner or
do not connect power supply
gasoline will damage the
until the wired controller is
appearance of this product. (Please
well installed. Otherwise, the
use soft dry cloth and wet cloth with
wired controller cannot be
mild detergent to clean the outer
used.
case of air conditioner.)
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
Connect power supply 8
hours before operation. Do
If you use gas heater or
not disconnect power if you
petroleum heater in the same room,
want to stop the unit in a short
please open the door or window to
period of time, e.g. in one
maintain good air circulation in
night. (This is for protecting
case the room may lack of oxygen.
the compressor.)
Do not turn off the air conditioner
Never start or stop this
until it runs for at least 5 minutes.
product by inserting or
Otherwise, oil-return of the
removing the power cord.
compressor will be affected.
Children are not allowed to
Do not operate this product with
operate this product.
wet hands.
Please turn the unit off and
unplug your air conditioner
Do not spray water on this product
before cleaning. Otherwise, it
or it will cause malfunction or
may cause electric shock or
electric shock.
personal injury.
Do not repair this product by
Do not expose this product
yourself. Improper repair will cause
directly to water or place it in
electric shock or fire hazard. Please
a damp or corrosive
contact ALPICAIR service center and
environment.
have it repaired by professional
technicians.
If abnormal condition occurs (e.g.
This product must be properly
unpleasant smell), please turn off
grounded through the
the unit at once and disconnect
receptacle to avoid electric
power supply. Then contact ALPICAIR
shock. The grounding wire
service center. If the air conditioner
shouldn't be connected with
continues to operate despite of
gas pipe, water pipe, lightning
abnormal condition, the unit may be
arrester or telephone line.
damaged and it may cause electric
shock or fire hazard.
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 ALPICAIR Electric Appliances, Inc. of Zhuhai.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
2 Product Introduction
2.1 Names of Key Components
Fig.2.1
No.
①
②
Name
Control Box
Expansion valve kit Box
2.2 Overall System Connection Diagram
Fig.2.2
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
3 Preparations for Installation
3.1 Before Installation
Notes: Product graphics are only for reference. Please refer to actual products.
Unspecified measure unit is mm.
① This equipment is designed for R410A system, and the designed working pressure is 4.2
MPa or 42 bar.
② Precautions for R410A:
a).The refrigerant requires strict cautions for keeping the system clean, dry and tight.
—Clean and dry ： Foreign materials (including mineral oils or moisture) should be
prevented from getting mixed into the system.
—Tight：Read this manual carefully and follow these procedures correctly.
b).Since R410A is a mixed refrigerant, the required additional refrigerant must be charged
in its liquid state (If the refrigerant is in state of gas, its composition changes and the
system will not work properly).
c).The connected air handling units must have heat exchangers designed exclusively for
R410A．
③ Never use this appliance under inflammable and explosive gas.
④ For the following items, take special care during construction and check after installation
is finished:
Tick √ when checked
Are the thermistors fixed firmly?
□
Thermistor may come loose.
Is the capacity code setted correctly?
□
The performance of system may not achieve it’s requirement.
Is the control box fixed firmly?
□
The unit may drop, vibrate or make noise.
Do electrical connections comply with specifications?
□
The unit may malfunction or components may burn out.
Are wiring and piping correct?
□
The unit may malfunction or components may burn out.
Is the unit safely grounded?
□
Dangerous at electric leakage.
3.2 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Appearance
1
Magnetic ring
1-2
2
Swell screw
4
4
Quantity
OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
3
Self-tapping screw
4
4
Bundle
1
5
Operating Instruction Manual
1
6
Operating Instruction Manual (Unitary Page)
1
7
Wired controller
1
3.3 Selecting the Air Handling Unit
Select the air handling unit according to the technical data and limitations mentioned in the
following table. Lifetime of the outdoor unit, operation range or operation reliability may be
influenced if you neglect these limitations.
Model
GMV-N140U/A-T
GMV-N280U/A-T
GMV-N560U/A-T
capacity
（kW）
Allowable internal volume
3
of heat exchanger (dm )
Allowable capacity of
heat exchanger (kW)
Suggested air
3
volume (m /h)
Minimum
Maximum
Minimum
Maximum
9.0
2.09
2.64
7.9
9.9
1500~1850
11.2
2.65
3.3
10
12.3
1850~2100
14.0
3.31
4.12
12.4
15.4
2100~2400
22.4
4.63
6.60
17.7
24.6
3700~4200
28.0
6.61
8.25
24.7
30.8
4200~4800
45.0
10
11.8
42.5
47.5
7400~8000
50.4
11.9
13.7
47.6
53.2
8000~8600
56.0
13.8
15.6
53.3
58.7
8600~9200
Notes:
a)
The capacity of heat exchanger is obtained at these test conditions: evaporation temperature at air outlet of
heat exchanger is 6℃, overheating degree of heat exchanger is 5℃ and the air return temperature is 27℃
DB/19℃WB.
b)
The heat exchanger of air handling unit is designed for R410A, and it’s working pressure is 4.2MPa.
c)
Quantity of rows of heat exchanger: no more than 4 rows.
d)
The diameter of copper pipe of heat exchanger is no more than 12.7mm. 9.52mm is recommended.
Notes: The air handling unit can be connected as a standard indoor unit to the outdoor unit.
The limitations of connection are determined by the outdoor unit.
3.4 Selecting the AHU-KIT Unit
The corresponding AHU-KIT unit needs to be selected for your air handling unit. Select the
AHU-KIT unit according to the above limitations.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
Capacity ranges of different AHU-KIT unit are as follows:
Model
Acquiescent capacity (kW)
Adjustable capacity (kW)
GMV-N140U/A-T
14.0
9.0/11.2/14.0
GMV-N280U/A-T
28.0
22.4/28
GMV-N560U/A-T
56.0
45/50.4/56
Different capacities of same model of AHU-KIT unit are achieved through dialing capacity
code of mainboard (shown as "S1").Capacity code setting is shown as follows:
S1
Capacity
1
2
3
4
5
(kW)
0
0
1
1
0
9.0
0
1
1
1
0
11.2
0
0
0
0
1
14.0
1
1
0
0
1
22.4
1
0
1
0
1
28.0
1
0
0
1
1
45.0
0
1
0
1
1
50.4
1
1
0
1
1
56
Please ensure dialing the code switch properly in place instead of middle position. Setting the
switch to "ON" stands for "0", otherwise stands for "1".
(Notes: The black part is the deflector rod.) The figure shows that the addresses of ”1,2,3,4,5”
are ”0,0,1,0,0”.
Notes:
① The selected air handling unit must be designed for R410A.
② Extraneous substances (including mineral oils or moisture) must be prevented from
getting mixed into the system.
3.5 Location for Installation
Select an installation site where the following conditions are fulfilled and that meets your
customer’s approval.
(1) The EXV box can be installed inside and outside. The control box should be installed
inside.
(2) Do not install the EXV box in or on the outdoor unit.
(3) Do not put the option boxes in direct sunlight. Direct sunlight will increase the
temperature inside the option boxes and may reduce its lifetime and influence its
operation.
(4) Choose a flat and strong mounting surface.
(5) Make sure there is enough free space in front and in the side of the AHU-KIT unit for
future maintenance.
(6) The installation site should be far away from heat source, inflammable gas and smoke.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
(7) Keep the air handling unit, power supply wiring and transmission wiring at least 1 m away
from televisions and radios. This is to prevent image interference and noise in those
electrical appliances. (Noise may be generated depending on the conditions under which
the electric wave is generated, even if 1 m is kept.)
(8) Make sure the electronic expansion valve is installed in an upright position.
Notes!
① Do not install or operate the unit in rooms mentioned below:
a). Where mineral oil, like cutting oil is present.
b). Where the air contains high levels of salt such as air near the ocean.
c). Where sulphurous gas is present such as that in areas of hot spring.
d). In vehicles or vessels.
e). Where voltage fluctuates a lot such as that in factories.
f). Where high concentration of vapor or spray are present.
g). Where machines generating electromagnetic waves are present.
h). Where acidic or alkaline vapor is present.
② Installing this unit must comply with the relevant local and national codes.
③ Connecting the power after all installation works are done.
3.6 Requirements for Communication Wire
Notes:
If the unit is installed in the place with strong electromagnetic interference, shielded wire
must be applied on the communication wire between indoor unit (AHU-KIT) and wired
controller. Twisted pair wire with shielding function must be applied on the communication
wire between indoor unit and indoor unit (outdoor unit).
3.6.1 Selecting communication wire for AHU-KIT and wired controller
Fig.3.6.1
Wire Type
Light/Common PVC
Jacket Soft Wire
Total Length of
Communication wire L(m)
Wire Gauge (mm2)
Remark
The total length of
L ≤ 250
2×0.75 ～ 2×1.25
communication wire should
not exceed 250m.
The shield cable is required
Light shield/Common
PVC Jacket Soft Wire
L ≤ 250
2×0.75 ～ 2×1.25
when the unit is installed in
the environment of strong
magnetic or interference.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
3.6.2 Select Communication wire for AHU-KIT and Outdoor Unit
Fig.3.6.2
Wire Type
Total Length of Communication
Wire Gauge
wire L(m)
(mm2)
Remark
If wire gauge is 2X1 mm2,
then it’s OK to increase the
Light/Common PVC Jacket
L ≤ 1000
Soft Wire
≥ 2×0.75
length of communication
wire. But total length should
not exceed 1500m.
The shield cable is required
Light shield/Common PVC
L ≤ 1000
Jacket Soft Wire
≥ 2×0.75
when the unit is installed in
the environment of strong
magnetic or interference.
3.7 Wiring Requirements
Power Cord Size and Air Switch Capacity:
Model
GMV-N140U/A-T
GMV-N280U/A-T
GMV-N560U/A-T
Power Cord Size
Air Switch
Capacity(A)
220~240V/1ph/50Hz &
208~230V/1ph/60Hz
Ground Wire
Power Cord
Minimum Sectional
Minimum Sectional
2
Area(mm )
Area(mm2)
6
1.0
1.0
6
1.0
1.0
6
1.0
1.0
Notes:
① Use copper wire only as unit’s power cord. Operating temperature should be within its
rated value.
② Above 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.
③ Install cut-off device near the unit. The minimum distance between each stage of cut-off
device should be 3 mm (The same for both indoor unit and outdoor unit).
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
4 Installation Instructions
4.1 Unit Dimensions and Maintenance Space
(1) Size of control box for GMV-N140U/A-T、GMV-N280U/A-T and GMV-N560U/A-T (Unit: mm):
Fig.4.1.1
Maintenance space of control space (Unit: mm):
Fig.4.1.2
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
(2) Size of EXV box for GMV-N140U/A-T and GMV-N280U/A-T(Unit: mm):
Fig.4.1.3
Size of EXV box for GMV-N560U/A-T (Unit: mm):
Fig.4.1.4
Maintenance space of EXV box (Unit: mm):
Fig.4.1.5
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
4.2 Piping Installation
4.2.1 Diagram of Piping Connection
Fig.4.2
1)
Air handling unit
2)
Connection pipe from expansion valve kit to air handling unit
3)
Valve kit
4)
Liquid pipe
5)
Gas pipe
Notes:
A: When the air handling unit is installed at the top of the EXV box, vertical distance between
the bottom of the air handling unit to the EXV box is no more than 2 m; if the air handling unit is
installed under the EXV box, vertical distance between the bottom of the air handling unit to the
EXV box is no more than 2 m.
L: The length of liquid pipe between the air handling unit to EXV box is no more than 2 m.
L is to be considered as a part of the total maximum piping length. See installation manual of
the outdoor unit for piping installation.
4.2.2 Piping Connections
Make sure to install gas and liquid pipe diameters in function of the air handling unit capacity
class.
Model
GMV-N140U/A-T
GMV-N280U/A-T
GMV-N560U/A-T
Capacity(kW)
Gas pipe(mm)
Connection pipe
Liquid pipe(mm)
9.0
Φ15.9
Φ9.52
11.2
Φ15.9
Φ9.52
14.0
Φ15.9
Φ9.52
22.4
Φ19.05
Φ9.52
28.0
Φ22.2
Φ9.52
45.0
Φ28.6
Φ12.7(*)
50.4
Φ28.6
Φ15.9
56.0
Φ28.6
Φ15.9
(*)Note:
The internal diameter of both inlet pipe and outlet pipe of EXV box for GMV-N560U/A-T is
Φ16.3mm. It needs engineering treatment on the scene if you want to connect liquid pipe of
Φ12.7mm( expanding the copper tube of Φ12.7mm or using a connection copper tube) in order to
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
satisfy the clearance requirement of welding(the clearance requirement is 0.1~0.2mm normally).
4.2.3 Selection of Piping
(1) Ensure the inside of the pipes is clean and no foreign materials.
(2) Pipe specifications:
R410A System
Pipe Φ（mm/inch）
Thickness(mm)
Temper grade of piping material
Φ6.35（1/4）
≥0.8
O
Φ9.52（3/8）
≥0.8
O
Φ12.70（1/2）
≥0.8
O
Φ15.9（5/8）
≥1.0
O
Φ19.05（3/4）
≥1.0
O
Φ22.2（7/8）
≥1.2
1/2H
Φ25.40（1/1）
≥1.2
1/2H
Φ28.6（9/8）
≥1.2
1/2H
Φ31.8（5/4）
≥1.3
1/2H
Φ34.90（11/8）
≥1.3
1/2H
Φ38.10（12/8）
≥1.5
1/2H
Φ41.30（13/8）
≥1.5
1/2H
Φ44.5（7/4）
≥1.5
1/2H
Φ51.4（7/4）
≥1.5
1/2H
Φ54.1（17/8）
≥1.5
1/2H
4.2.4 Cautions for Welding
(1) Make sure there is nitrogen protection during welding.
Welding without carrying out nitrogen replacement or releasing nitrogen into the piping will
create large quantities of oxidized film on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal operation.
(2) When welding while inserting nitrogen into the piping, nitrogen must be set to 0.02 MPa
with a pressure-reducing valve (=just enough so that it can be felt on the skin).
Fig.4.2.4
1)
Refrigerant piping
2)
Part to be welded
3)
Taping
4)
Hands valve
5)
Pressure-reducing valve
6)
Nitrogen
(3) For details, see manual of the outdoor unit.
Notes:
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
① All field piping must be provided by a licensed refrigeration technician and must comply
with the relevant local and national codes.
② The EXV box is required to be installed in a vertical direction within the range of 90±15°
(not allowed for horizontal work). Welding the connection tubes first before refrigerant
pipes in order to avoid face-down soldering.
a. For refrigerant piping of outdoor unit, refer to the installation manual supplied with the
outdoor unit.
b. The maximum allowed piping length depends on the connected outdoor model.
4.3 EXV Installation
4.3.1 Mechanical Installation
(1) Remove the EXV box cover by unscrewing screws.
(2) Drill 4 holes on correct position (measurements as indicated in figure below) and fix the
valve kit box securely with 4 screws through the provided holes Ø12 mm.
Notes:
① Make sure that the EXV box is installed upwards.
② Make sure there is enough free space in front and in the side of the box for future
maintenance.
4.3.2 Welding Work
(1) Prepare the inlet/outlet field piping just in front of the connection (do not weld yet).
Fig.4.3.2
A Inlet coming from the outdoor unit
B Outlet to air handling unit
C Wire clamp
(2) Remove the wire clamp (C) by unscrewing 6xM4.2.
(3) Weld the field piping.
Notes:
① Make sure to cool the filters and valve body with a wet cloth and make sure the body
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
temperature does not exceed 120°C during welding.
② Make sure that the other parts such as electrical box, tie wraps and wires are
protected from direct welding flames during welding.
③ The EXV box is required to be installed in a vertical direction within the range of 90±15°
(not allowed for horizontal work). Welding the connection tubes first before refrigerant
pipes in order to avoid face-down soldering.
(4) Secure the wire clamp (C) in place again (6xM4.2).
(5) Make sure that field pipes are fully insulated. Make sure that there is no gap between
both ends in order to avoid condensation dripping (finish the connection with tape
eventually).
4.4 Installation of the Control Box
Fig.4.4
4.4.1 Mechanical Installation
（1）
Fix the control box with its hanger brackets to the mounting surface.
（2）
Open the lid of the control box.
（3）
For electrical wiring: refer to the following contents.
（4）
Install the screw nuts.
（5）
Close the unnecessary openings.
（6）
Close the lid securely after installation to ensure that the control box is watertight.
4.4.2 Wire connection Inside the Control Box
Notes:
① Pull the wires inside through the screw nut and close the nut firmly in order to ensure a
good pull relieve and water protection.
② The cables require an additional pull relief. Fixing the cable with the wire clamp.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
Fig.4.4.2.1
Precautions:
(1) Thermistor cable and remote controller wire should be kept away from power cable in a
distance of at least 50mm. Violating this rule may generate electric noise and lead to
malfunctions.
(2) Use wires as specified and connect them tightly with wiring terminals. Keep the wires in
order and do not obstruct other devices. Insecure connection may result in overheating
or even cause electric shock or fire hazard.
Wiring connection:
Fig.4.2.2.2
Connecting cables according to the following instructions, as figure shown above.
L......................... Live
N........................ Neutral
..................... Protective earth (screw)
H........................High gear of fan
M........................Middle gear of fan
L........................ Low gear of fan
1/2........................ Lines of fault signal from external feedback
D1/D2........................Communication wires
H1/H2........................Wired controller
Notes:
① The H, M, L of fan gear lines and the 1, 2 of Lines of fault signal from external feedback
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
are shorted by the factory default.
② Neutral line of fan connects to the N.
It can be connected to any of them (H, M, L) when there is only one gear.
Disconnect the short cable between H and M when there are two gears, then connect
the high gear cable to H, and connect low gear cable to either M or L.
When there are three gears, disconnect the short cables between H and M, M and L,
then connect the high gear cable, middle gear cable and low gear cable to H,M,L for
each.
③ The lines of fault signal from external feedback are connected to the 1, 2.The line is a dry
contact and closed normally. If the line is closed, it represents no fault and the system
operates normally; if the line is disconnected, it represents malfunction and the system
will stop.
④ Disconnect the short cable between 1 and 2 when there is fault signal, and connect the
signal cable to 1 and 2.
⑤ Pull the wires inside through the screw nut and close the nut firmly in order to ensure a
good pull relieve and water protection.
⑥ The cables require an additional pull relief. Fixing the cable with the wire clamp.
4.5 Installation of the Thermistors
4.5.1 Refrigerant Thermistors
Location of the thermistor:
A correct installation of the thermistors is required to ensure a good operation:
(1) Liquid(RT4)
Install the thermistor behind the distributor on the coldest pass of the heat exchanger (contact
your heat exchanger dealer).
(2) Gas (RT2)
Install the thermistor at the outlet of the heat exchanger as close as possible to the heat
exchanger.
Fig.4.5.1.1
① Liquid RT4
② Gas RT2
Installation of the thermistor cable
(1) The length of thermistor wire is 10 m.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
(2) Put the thermistor cable in an individual protective tube.
(3) Apply stress release in the temperature sensor wire to prevent the temperature sensor
wire from getting loose due to stress. Stress or looseness of temperature sensor wire will
lead to poor contact and inaccuracy of temperature measuring.
Fixation of the thermistor
Notes:
① Put the thermistor wire slightly down to avoid water accumulation on top of the thermistor.
Fig.4.5.1.2
② Keep the thermistor and air handling unit in good contact. Put the top of the thermistor on
the air handling unit, because the top of thermistor is the most sensitive part. Please
fixing the thermistor on the horizontal plane of copper tube (within ±30°), and make them
close together.
Fig.4.5.1.3
(1) Fix the thermistor with insulating aluminum tape in order to ensure good heat
transference.
Fig.4.5.1.4
(2) Cover the thermistor with rubber belt to prevent looseness of temperature sensor.
’
Fig.4.5.1.5
(3) Use two wire ties to bind the thermistor securely.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
Fig.4.5.1.6
(4) Wrap the thermistor with insulating trip.
Fig.4.5.1.7
4.5.2 Air Thermistor
The air thermistor (RT1) can be installed in the space which needs temperature control, or the
inlet scoop of air handling unit.
Notes:
① For connection to outdoor unit and to AHU-KIT unit: Pull the wires inside through the
screw nut and close the nut firmly in order to ensure a good pull relieve and water
protection.
② The cables require an additional pull relief. Fixing the cable with the wire clamp.
③ The connection of thermistor requires enough space.
4.6 Installation of the EXV Cable
Referring to the circuit diagram, then connect the EXV cable to the circuit-board of control box.
Be sure that the cable is fixed firmly in order to ensure a good pull relieve and water protection.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
4.7 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.
5 Wire Connection
Notes:
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 capacity of power supply should be big enough.
④ The unit should be powered by independent circuit and specific socket.
⑤ The wiring should be in accordance with related regulations in order to ensure the units
reliable running.
⑥ Install circuit breaker for branch circuit according to related regulations and electrical
standards.
⑦ All wiring must use pressure terminal or single wire. Multi-twisted wire that connects
directly to the wiring board may cause fire hazard.
⑧ Keep cable away from refrigerant piping, compressor and fan motor.
⑨ Do not alter the inner wires of air conditioner. Manufacturer does not assume
responsibility for damage or abnormal operation due to this reason.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
⑩ If the unit is installed in places with strong electromagnetic interference, it's
recommended to use twin-twisted shield wire. During wire connection, please pay
attention that the metal shield layer of the twin-twisted wire must be grounded (outer case)
in order to prevent the unit from electromagnetic interference.
⑪ The communication wires should be separated from power cord and connection wire
between indoor unit and outdoor unit.
⑫ The appliance shall be installed in accordance with national wiring regulations.
5.1 Connect Cables and Terminals of Wiring Board
(1) Connection of Wire and Patch Board Terminal (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
5.2 Power Cord Connection
Notes!
Power supply of each indoor unit must be from the same source.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
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 control 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 fig.5.3.1.
4)
Fix the communication cable with clamp of electric box.
5)
For more reliable communication, make sure connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in fig 5.3.2,
terminal resistor is provided with each ODU.
Fig.5.3.1
Fig.5.3.2
5.4 Connect Communication Wire of Wired Controller
1)
Open electric box cover of indoor unit.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT 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:
Fig.5.4 shows the installation of wired controller:
Fig.5.4
5.5 Illuminate for Connection of Wired Controller and Indoor Units
(AHU-KIT) 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.
(4) One wired controller can control 16 indoor units in maximum at the same time (as shown
in fig.5.5).
Notes:
① The type of indoor units must be the same if they are controlled by the same wired
controller.
② When the indoor unit is controlled by two wired controllers, the addresses of the two
wired controllers should be different through address setting. Address 1 is for main
controller; Address 2 is for slave controller. Detailed settings please refer to the
instruction manual of wired controller.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
Fig.5.5
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
6 Operation and Maintenance
6.1 Before Operation
Notes:
① Before initiating operation, please read the operation manuals of outdoor unit, AHU-KIT
unit and the air handling unit carefully.
② Refer to the installation manuals of the outdoor unit, AHU-KIT unit and the remote
controller about settings of unit.
6.2 Test Operation
Before executing "test operation" as well as before operating the unit, you must check the
following:
① Refer to the section of "For the following items, take special care during construction and
check after installation is finished".
② Ensure the construction of refrigerant piping, drain piping and electric wiring are finished.
③ Check everything written in the installation manuals of the outdoor unit, AHU-KIT unit and
the air handling unit.
④ Open the gas side stop valve.
⑤ Open the liquid side stop valve.
Executing the test operation:
(1) Referring to the manuals of the outdoor unit and the air handling unit.
(2) Confirm that the fan of the air handling unit is ON.
Notes:
In case of poor distribution in the air handling unit, 1 or more passes of the air handling unit
may freeze-up (collect ice) ➞ put the thermistor (RT4) on this position.
6.3 Routine Maintenance
Warning!
(1) Only a qualified service person is allowed to perform maintenance.
(2) Before obtaining access to terminal devices, all power supply circuits must be
interrupted.
(3) Water or detergent may deteriorate the insulation of electronic components and result in
burn-out of these components.
(4) Stand at solid table when cleaning the unit.
(5) Do not clean the unit with hot water whose temperature is higher than 45°C to prevent
fade or deformation.
(6) Clean the filter with a wet cloth dipped in neutral detergent.
(7) Please contact after-sales service staff if there is abnormal situation.
6.3.1 Maintenance Before the Seasonal Use
(1) Check if the air inlet and air outlet of indoor and outdoor unit are blocked.
(2) Check if securely grounded.
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OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
(3) Check if all the power cord and communication cable are securely connected.
(4) Check if any error code displayed after energized.
6.3.2 Maintenance After the Seasonal Use
(1) Set the unit in fan mode for half a day in a sunny day to dry the inner part of unit.
(2) When the unit won’t be used for a long time, please cut off power supply for energy
saving; the characters on the wired controller screen will disappear after cutting off the
power supply.
6.4 Disposal Requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other parts must be done in
accordance with relevant local and national legislation.
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
Content
Error
Code
Quantity Of Group
L0
Indoor Unit Error
L9
Control Indoor Units
d8
Setting Error
L1
L2
L3
L4
L5
L6
L7
L8
db
Error From External
Feedback
E-heater Protection
Water Full
Protection
Wired Controller
Power Supply Error
Anti-Frosting
Protection
Model Conflict
No Master Indoor
Unit Error
Power Insufficiency
Protection
LA
LH
LC
d1
d3
d4
Indoor Units
Incompatibility Error
Low Air Quality Warning
Outdoor-Indoor
Incompatibility Error
Indoor Unit PC-Board
Error
Ambient Temperature
Sensor Error
Inlet Piping Temperature
Sensor Error
d9
dA
dH
dC
Content
Water Temperature
Sensor Error
Jumper Cap Error
Indoor Unit Hardware
Address Error
Wired Controller
PC-Board Error
Capacity DIP Switch
Setting Error
Outlet Air
dL
Temperature Sensor
Error
dE
Indoor Unit CO2
Sensor Error
Outlet Piping
d6
Temperature Sensor
C0
Communication Error
Error
d7
Humidity Sensor Error
AJ
Special Code: Field Debugging Code
25
Filter Cleaning
Reminder
OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
8 Troubleshooting
If your air conditioner is not working well, please check the following table first before asking
for service:
Phenomenon
Troubleshooting
① No power supply.
② Circuit breaker is tripped because of current leakage.
The unit can’t start
③ Circuit voltage is too low.
④ ON/OFF key sets at the stop position.
⑤ Failure in control system.
① Obstacle in front of the condenser.
The unit stops after running for a
while
② Abnormal operation of the control system.
③ Outdoor temperature is higher than 43℃ when cooling
mode is used.
① Air filter is dirty or blocked.
② Too many heating sources or people in the room.
③ Doors or windows are open.
Poor cooling effect
④ Obstacle at the air intake and outlet of the unit.
⑤ Setting temperature is too high or refrigerant is
insufficient (e.g. refrigerant leakage).
⑥ Poor performance of the indoor temperature sensor.
① Air filter is dirty or blocked.
② Doors or windows are open.
Poor heating effect
③ Wrong temperature setting (too low).
④ Refrigerant leakage.
⑤ Outdoor temperature is lower than -5℃.
⑥ Abnormal operation of the control system.
① Improper location of tube sensor.
Indoor fan doesn’t start up during
heating
② The tube sensor inserts not well.
③ The wiring of tube sensor is broken.
④ Electricity leakage of capacitor.
Notes:
If air conditioner still fails to work normally after checking and handling as described above,
please stop using it immediately and contact local service center for assistance.
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