Alpic Air AOU Series User manual

Owner's Manual
Original Instructions
Commercial Air Conditioners
AOU DC Inverter VRF
Model:
AOU-224VRDC3B AOU-282VRDC3B
AOU-280VRDC3B AOU-335VRDC3B
AOU-400VRDC3B AOU-450VRDC3B
AOU-451VRDC3B AOU-504VRDC3B
AOU-560VRDC3B AOU-615VRDC3B

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

Contents
1 SAFETY NOTICES (PLEASE BE SURE TO ABIDE) .................................................................... 1
2 PRODUCT INTRODUCTION..........................................................................................................4
2.1 NAMES OF MAIN PARTS ............................................................................................................... 4
2.2COMBINATIONS OF INDOOR AND OUTDOOR UNITS ......................................................................... 5
2.3THE RANGE OF PRODUCTION WORKING TEMPERATURE ................................................................ 7
3 PREPARATION BEFORE INSTALLATION....................................................................................7
3.1 STANDARD PARTS ....................................................................................................................... 7
3.2 INSTALLATION SITE ...................................................................................................................... 7
3.3 PIPING WORK REQUIREMENTS................................................................................................... 12
4 INSTALLATION INSTRUCTION...................................................................................................13
4.1 PHYSICAL DIMENSION OF THE OUTDOOR UNIT AND MOUNTING HOLE........................................... 13
4.2 CONNECTION PIPE .................................................................................................................... 16
4.3 INSTALLATION OF THE CONNECTION PIPE.................................................................................... 27
4.4 AIR PURGING AND REFRIGERANT CHARGE.................................................................................. 32
4.5 ELECTRIC WIRING..................................................................................................................... 35
4.6 SYSTEM COMMUNICATION.......................................................................................................... 38
4.7 CONNECTION METHOD AND STEPS FOR SYSTEM COMMUNICATION .............................................. 42
4.8 EXTERNAL ELECTRICAL WIRING DIAGRAM .................................................................................. 47
5 CHECK ITEMS AFTER INSTALLATION AND TRIAL RUN......................................................... 48
5.1 CHECK ITEMS AFTER INSTALLATION ............................................................................................ 48
5.2 TRIAL RUN ................................................................................................................................ 49
6 COMMON MALFUNCTION AND TROUBLESHOOTING............................................................61
7 ERROR INDICATION....................................................................................................................63
8 MAINTENANCE AND CARE........................................................................................................ 67
8.1 OUTDOOR HEAT EXCHANGER .................................................................................................... 67
8.2 DRAIN PIPE............................................................................................................................... 67
8.3 NOTICE BEFORE SEASONAL USE................................................................................................ 67
8.4 MAINTENANCE AFTER SEASONAL USE ........................................................................................ 68
8.5 PARTS REPLACEMENT ............................................................................................................... 68
9 AFTER-SALES SERVICE.............................................................................................................68

AOU DC Inverter VRF
1
1 Safety Notices (Please be sure to abide)
Warning: If not abide strictly, it may cause severe damage to the unit or the people.
Note: If not abide strictly, it may cause slight or medium damage to the unit or the
people.
This sign indicates that the operation must be prohibited. Improper operation may
cause severe damage or death to people.
This sign indicates that the items must be observed. Improper operation may cause
damage to people or property.
WARNING!
This product can’t be installed at corrosive, inflammable or explosive environment or the
place with special requirements, such as 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.
Follow this instruction to
complete the installation work.
Please carefully read this
manual before unit startup and
service.
Installation should be
conducted by dealer or
qualified personnel. Please do
not attempt to install the unit
by yourself. Improper handling
may result in water leakage,
electric shock or fire disaster
etc.
Before installation, please check
if the power supply is in
accordance with the
requirements specified on the
nameplate. And also take care of
the power safety.
Make sure the unit can be
earthed properly and soundly
after plugging into the socket
so as to avoid electric shock.
Please do not connect the
ground wire to gas pipe, water
pipe, lightning rod or
telephone line.
Be sure to use the exclusive
accessory and part to prevent
the water leakage, electric shock
and fire accidents.
If refrigerant leakage happens
during installation, please
ventilate immediately.
Poisonous gas will emerge if
the refrigerant gas meets fire.
Wire size of power cord should
be large enough.The damaged
power cord and connection wire
should be replaced by exclusive
cable.
After connecting the power
cord, please fix the electric
box cover properly in order to
avoid accident.

AOU DC Inverter VRF
2
Never fail to comply with the
nitrigen charge
requirements.Charge nitrogen
when welding pipes.
Never short-circiut or cancel
the pressure switch to prevent
unit damage.
Please firstly connect the wired
controller before energization,
otherwise wired controller can
not be used.
Before using the unit, please
check if the piping and wiring
are correct to avoid water
leakage, refrigerant leakage,
electric shock, or fire etc.
Do not insert fingers or objects
into air outlet/inlet grille.
Open the door and window
and keep good ventilation in
the room to avoid oxygen
deficit when the gas/oil
supplied heating equipment is
used.
Never start up or shut off the air
conditioner by means of directly
plug or unplug the power cord.
Turn off the unit after it runs at
least five minutes; otherwise it
will influence oil return of the
compressor.
Do not allow children operate
this unit.
Do not operate this unit with
wet hands.
Turn off the unit or cut off the
power supply before cleaning
the unit, otherwise electric shock
or injury may happen.
Never spray or flush water
towards unit, otherwise
malfunction or electric shock
may happen.
Do not expose the unit to the
moist or corrosive
circumstances.
Electrify the unit 8 hours
before operation. Please
switch on for 8 hours before
operation. Do not cut off the
power when 24 hours
short-time halting (to protect
the compressor).
Volatile liquid, such as diluent or
gas will damage the unit
appearance.Only use soft cloth
with a little neutral detergent to
clean the outer casing of unit.
Under cooling mode, please
don't set the room temperature
too low and keep the
temperature difference
between indoor and outdoor
unit within 5.

AOU DC Inverter VRF
3
If anything abnormal happens
(such as burning smell), please
power off the unit and cut off the
main power supply, and then
immerdiately contact ALPICAIR
appointed service center.If
abnormality keeps going, the
unit might be damaged and lead
to electric shock or fire.
User is not allowed to repair
the unit. Fault service may
cause electric shock or fire
accidents. Please contact
ALPICAIRe appointed service
center for help.
ALPICAIR will not assume responsibility of personal injury or equipment damage caused by
improper installation and commission, unnecessary service and incapable of following the rules
and instructions listed in this manual.
DISPOSAL：Donot dispose this product as unsorted municipal waste. Collection of such
waste separately for special treatment is necessary.

AOU DC Inverter VRF
4
2 Product Introduction
ALPICAIR Multi VRF Modular System adopts inverter compressor technology. According to
change the displacement of compressor, stepless capacity regulation within range of
10%-100% can be realized. Various product lineup is provided with capacity range from
22.4kW to 246kW, which can be widely used in working area and especially applicable to the
place with variable load change.ALPICAIR air conditioner is absolutely your best choice.
2.1 Names of Main Parts
Fig. 2.1.1
NO.
①
②
③
④
⑤
Name
Fan, Motor
Electric Box
Assembly
Valve interface
Power cord
through-hole
Communication
code through-hole
Note: The picture is only used for reference and the actual product prevails.

AOU DC Inverter VRF
5
2.2Combinations of Indoor and Outdoor Units
(1) The following table indicates the number of IDU for ODU
ODU model
Max number of connectable IDU (unit)
AOU-224VRDC3B
13
AOU-280VRDC3B
16
AOU-282VRDC3B
16
AOU-335VRDC3B
19
AOU-400VRDC3B
23
AOU-451VRDC3B
26
AOU-450VRDC3B
26
AOU-504VRDC3B
29
AOU-560VRDC3B
33
AOU-615VRDC3B
36
AOU-680~2460VRDC3B
39~80

AOU DC Inverter VRF
6
The total capacity of indoor units should be within 50%~135% of that of outdoor units.
Fig. 2.3.1
Fig. 2.3.1 is the combination view of the ODU of Modular DC Inverter Multi VRF System
and the IDU of Multi VRF System. IDU can be cassette type, one-way cassette type,
wall-mounted type, duct type, etc. When any one IDU receives operation signal, ODU will start
to work according to the capacity; when all IDUs stop, ODU will also stop.

AOU DC Inverter VRF
7
2.3The Range of Production Working Temperature
Cooling
Ambient temperature: -5℃~52℃
Heating
Ambient temperature: -20℃~24℃
When the indoor units are all VRF fresh air processor, the unit operating range is as follows:
Cooling
Ambient temperature: 16°C~45°C
Heating
Ambient temperature: -7°C~16°C
Note： Out of the working Temperature Range may damage this products and will invalidate
the warranty.
3 Preparation before Installation
Note: The picture is only used for reference and the actual product prevails. Unit: mm.
3.1 Standard Parts
Please use the following standard parts supplied by ALPICAIR.
Parts for Outdoor Unit
Number
Name
Picture
Quantity
Remarks
1
Owner's Manual
1
2
Wiring (match with
resistance)
1
Must be connected to the last
IDU of communication
connection
3
Mark (Master )
2
Attach on the wired controller of
master IDU or on the front panel
3.2 Installation Site
Forbidden Items! It indicates that improper operation might lead to human casualty or
sever injury.
Items need to be followed. It indicates that improper operation might lead to personal
injury or property damage.
Install the unit at a place where
is adequate to withstand the
weight of the unit and make sure
the unit would not shake or fall
off.
The installation position
should withstand strong wind,
typhoon and earthquake. The
unit must be installed stably.

AOU DC Inverter VRF
8
Try to keep the unit away from
combustible, inflammable and
corrosive gas or exhaust gas.
Leave some space for heat
exchanging and servicing so
as to guarantee unit normal
operation.
Keep the indoor and outdoor
units close to each other as
much as possible so as to
decrease the pipe length and
bends.
Never allow children to
approach to the unit and take
measures to prevent children
touching the unit.
3.2.1 When the outdoor unit is totally surrounded by walls, please refer to following
figures for space dimension.
3.2.1.1 Space dimension for single-module unit
Fig. 3.2.1
3.2.1.2 Space dimension for dual-module unit
Fig. 3.2.2

AOU DC Inverter VRF
9
3.2.1.3 Space dimension for three-module unit
Fig. 3.2.3
3.2.1.4 Space dimension for four-module unit
Fig. 3.2.4
3.2.2 When there is wall (or similar obstruction) above the unit, keep the distance
between the unit top and the wall at least 3000mm or above. When the unit is
located in a totally open space with no obstructions in four directions, keep the
distance between the unit top and wall at least 1500mm or above (See Fig. 3.2.5).
When space is limited within 1500mm or the unit is not set in an open space, air
return pipe is required to be installed in order to keep good ventilation (See Fig.
3.2.6).

AOU DC Inverter VRF
10
Fig. 3.2.5 Fig. 3.2.6
3.2.3 Space dimension for multiple-module unit
For keeping good ventilation, make sure there is no obstructions above the unit.
When the unit is located at a half-open space (front and left/right side is open), install the
unit as per the same or opposite direction.
Fig. 3.2.7
Fig. 3.2.8

AOU DC Inverter VRF
11
3.2.4 Take seasonal wind into consideration when installing the outdoor unit
（1）Anti-monsoon installation requirements for unit not connecting exhaust duct:
Fig. 3.2.9
（2）Anti-monsoon installation requirements for unit connecting exhaust duct:
Fig. 3.2.10

AOU DC Inverter VRF
12
3.2.5 Take snow into consideration when installing the outdoor unit
Fig. 3.2.11
3.3 Piping Work Requirements
Refer to the table below for piping work requirements.
R410A Refrigerant System
Outer Diameter (mm)
Wall Thickness (mm)
Type
Φ6.35
≥0.8
O
Φ9.52
≥0.8
O
Φ12.70
≥0.8
O
Φ15.9
≥1.0
O
Φ19.05
≥1.0
1/2H
Φ22.2
≥1.5
1/2H
Φ25.40
≥1.5
1/2H
Φ28.60
≥1.5
1/2H
Φ34.90
≥1.5
1/2H
Φ38.10
≥1.5
1/2H
Φ41.30
≥1.5
1/2H
Φ44.5
≥1.5
1/2H
Φ54.1
≥1.5
1/2H

AOU DC Inverter VRF
13
4 Installation Instruction
4.1 Physical Dimension of the Outdoor Unit and Mounting Hole
Outline and Physical Dimention of AOU-224VRDC3B, AOU-280VRDC3B and
AOU-282VRDC3B unit
Unit: mm
Fig. 4.1.1

AOU DC Inverter VRF
14
Outline and Physical Dimention of AOU-335VRDC3B, AOU-400VRDC3B and
AOU-451VRDC3B unit
Unit: mm
Fig. 4.1.2

AOU DC Inverter VRF
15
Outline and Physical Dimention of AOU-450VRDC3B, AOU-504VRDC3B,
AOU-560VRDC3B and AOU-615VRDC3B unit
Unit: mm
Fig. 4.1.3

AOU DC Inverter VRF
16
4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Fig. 4.2.1

AOU DC Inverter VRF
17
4.2.2 Schematic Diagram of Piping Sequence
AOU-224VRDC3B, AOU-280VRDC3B and AOU-282VRDC3B
Fig. 4.2.2
AOU-335VRDC3B, AOU-400VRDC3B and AOU-451VRDC3B
Fig. 4.2.3