Haier AU282FHAHA User manual

Commercial Air Conditioner
Service Manual
Model:
AU282FHAHA
Features:
●Single AC inverter compressor unit
●Central control by one central controller
●Auto-restart
●Max. 5indoor units can be connected
●Refrigerant: R22
●Super long piping length and large drop
between indoor unit and outdoor unit
●Individual operation for every indoor uint, energy saving
● Negative ion generator(optional)
MANUAL CODE:SYJS-019-05 rev.0 Edition：2005-01-25

- 1 -
CONTENTS
1. Description of Products & Features….......………………...…….2
2. Specifications…………………………. ………………..........……6
3. Safety precaution………………………….........…………………7
4. Net dimensions of outdoor unit…….......…………......................9
5. Installation instructions ………………….......…. ………………..10
6. Parts and functions …………………......………..…… ..………..27
7. Remote controller functions………………………….……….......28
8. Refrigerant diagram…………………………..……………...........29
9. Electrical control functions……………………………………......30
10. Diagnostic information(trouble shooting)…………….…….......42
11. Electrical data.........................................…………….…….......45
12. Exploded views and parts lists...............……………. …….......49
13. Perdormance curves……………............................... …….......53
14. Noise level charts.....……………............................... ……......54
Contents……..............................................…...………...……........1
Commercial Air Conditioner Model: A282FHAHA

Commercial Air Conditioner Model: A282FHAHA
1. Description of product & features
1.1Nomenclature
A U 28 2F HA HA
1 2 34 5 6 7 8 9 10
1：Product type symbol ( A stands for air conditioner)
2：Product model ( U stands for air conditioner outdoor unit)
34: Product specification ( 28 stands for nominal cooling capacity is 28000
BTU)
5：Applicable voltage ( 2stands for 1PH/220 V/50 Hz)
6：Product series ( F stands for free combination)
7：Appearance character ( Hstands for 3HP outdoor unit)
8：Product type ( A stands for heat pump type, refrigerant is R22)
9：Design serial number
10：Climate type ( A stands for T1 climate)
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Note:
1. The designed capacity when installing(total capacity of indoor units
connected to outdoor unit) < 130% of rated capacity of the outdoor unit.
2. Total working capacity of indoor units should be not over 100% of rated
capacity of the outdoor unit.
3. All the indoor units of the H-MRV series can be matched freely under
the 130% of the its cooling capacity(28000Btu/h), but when the matching
capacity of indoor units exceeds 100% of the outdoor unit, the efficiency
will reduce.
Nominal
capacity(BTU/h)
Indoor units capacity
connected(BTU/h)Appearance Model
Refrig
erant
cooling heating Min. Max.
Max.
indoor
units
AU282
FHAHA R22 28000 32000 14000 36000 5
Commercial Air Conditioner Model: A282FHAHA
- 3 -
1.2 Outdoor unit parameters

1.3 Types of indoor units
cooling heating
AB092FCAHA R22 9000 12000
AB142FCAHA R22 14000 17000
AB182FCAHA R22 18000 21000
Convertible AC182FCAHA R22 18000 21000
AE072FCAKA R22 7000 9000
AE242FCAKA R22 24000 28000
AE092FCAKA R22 9000 11000
AE122FCAKA R22 12000 14000
AE142FCAKA R22 14000 16000
AE182FCAKA R22 18000 21000
AE212FCAKA R22 21000 24000
Cabinet AP182FAAHA R22 18000 21000
AS062FMAHA R22 6000 8000
AS072FMAHA R22 7000 9000
AS092FMAHA R22 9000 13000
AS122FMAHA R22 12000 14000
AS182FTAHA R22 18000 21000
capacity(BTU/h)
type appearance model refrigerant
Wall-mounted
Four way cassette
Ceiling concealed
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Commercial Air Conditioner Model: A282FHAHA

1.4. Character of Products
1) The length of horizontal refrigerant pipe can be 35m,the total pipe length can reach
50m, the height difference between indoor units and outdoor unit can reach 30m, the
height drop between indoor units can be up to 10m. Refer to the figure below.
2) 1000m super far distance communication between indoor and outdoor units, convenient
control and easy to enlarge the scale of units assembly.
3) Indoor units can be controlled separately.
4) Equipped with computer-checking interface, conveniently for service work.
5) Far distance flow of refrigerant, and distribute refrigerant intelligently and reasonably
according to the needs of each room, high efficient and energy saving.
6) Display trouble code automatically.
7) Healthy negative ion generation function can refresh the air and excite the oxygen,it is optional.
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Commercial Air Conditioner Model:
AU282FHAHA
Drop height between indoor units
H up to 30mm
Length of the longest piping after the first
branch piping L
g
L 4
hi
Length of the longest piping L up to 50m
L 2
L 1
f
L 3
a b cde
Outdoor unit
First branch piping Indoor unit
Drop height between indoor and outdoor units
Piping part
L 2 +L 3 +L 4 +e
Longest piping L
Piping length of indoor unit which is furthest to the first
branch piping L
Drop height between indoor and
outdoor unit H
Drop height between indoor units h
50m
35m
15m
30m
20m
10m
L 1 +L 2 +L 3 +L 4 +a+b+c+d+e
L 1 +L 2 +L 3 +L 4 +e
Piping length
Total length of piping (actual length)
Permissible value
Actual length
Drop height
Upper outdoor
Lower outdoor
h up to 10m
up to 35m

Commercial Air Conditioning
Specifications
Function cooling heating
Capacity BTU/h 28000 32000
Capacity W 8000 9500
Sensible heat ratio //
W3500 3000
W4400 3500
EER or COP W/W //
Dehumidifying capacity 10‐³×m³/h
Power cable section
Signal cable section
Connecting cable section
Wired control cable For wired control unit section
Power source Ph, V, Hz
A / A 18/22 16/18
Start Current A
Class of anti electric shock
Circuit breaker A
Max. operating pressure of heat side Mpa
Max. operating pressure of cold side Mpa
Unit model (color)
Model / Manufacture
Oil model
Oil type
Oil charging
Type
Protection type
Starting method
Type × Number
Speed(H-M-L) r/min
Fan motor output power kW
Air-flow(H-M-L) m³/h
Type / Diameter mm
Row / Fin pitch
Temp. scope ℃
External （L×W×H）mm×mm×mm
Package （L×W×H）mm×mm×mm
Refrigerant control method mm/mm
Volume of accumulator L
Noise level dB(A)
material of reduce noise
crankcase heater power W
kg / kg
Type / Charge g
Recharge quantity g/m
Liquid mm
Gas mm
Connecting Method
m
m
Model:AU282FHAHA
Norminal condition:
indoor temperature (cooling): 27℃DB/19℃WB, indoor temperature (heating): 20℃DB
Outdoor temperature(cooling): 35℃DB/24℃WB, outdoor temperature(heating): 7℃DB/6℃WB
Class 1
SUNISO-4GSI
720+/- 20ml
by thermistors
/
2 X
(
1.0-1.5
)
mm2
,
shielded
3 X
(
1-1.5
)
mm2
3 X (0.5-0.75)mm2,shielded
45
1/220/50
/
2.65
2.65
840/780/550
Inverter,soft-start
Running /Max.Running
65
3600
Item Model AU282FHAHA
/
3 X 6 mm2
Nominal power input
Max. power input
Outdoor unit
WHITE
2/1.5mm
/
Heat exchanger
Finned,Inner grooved copper/9.52
/
57
Axial fan/1
Type of Four way valve
PIPING
R22/2200
/
Pipe 9.52
15.88
Flared
Between I.D &O.D MAX.Drop 30
MAX.Piping length 50
Weight (Net / Shipping) 74/89
Refrigerant
electromagnetic
/
Defrosting automatic
/
Fan
Compressor
EEV+capillary
scroll
THS20MC6-Y/HITACHI
Dimension 948X340X830
1090X410X970
- 6-

WARNING
CAUTION
WARNING
CAUTION
This system should be applied to places of office, restaurant, residence and the like. Appliaction to inferior
environment such as engineering shop could cause equipment malfunction.
Please entrust installation to either the company which sold you the equipment or to a professional contractor.
Defects from improper installations can be the cause of water leakage, electric shocks and fires.
Execute the installation accurately, based on following the installation manual. Again, improper installations can
result in water leakage, electric shocks and fires.
When a large air-conditioning system is installed to a small room, it is necessary to have a prior planned
countermeasure for the rare case of a refrigerant leakage, to prevent the exceeding of threshold concentration.
In regards to preparing this countermeasure, consult with the company from which you purchased the equipment,
and make the installation accordingly. In the rare event that a refrigerant leakage and exceeding of threshold
concentration does occur,there is the danger of a resultant oxygen deficiency accident.
For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insufficient,
injury can result from a falling of the unit.
Execute the prescribed installation construction to prepare for earthquakes and the strong winds of typhoons and
hurricanes, etc. Improper installations can result in accidents due to a violent falling over of the unit.
For electrical work, please see that a licensed electrician executes the work while following the safety standards
related to electrical equipment, and local regulations as well as the installation instructions, and that only exclusive
use circuits are used.
Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and
fires.
Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted to
the terminal connection part, through properly securing it. Improper connection or securing can result in heat
generation or fire.
Take care that wiring does not rise upward, and accurately install the lid/service panel. Its improper installation can
also result in heat generation or fire.
WARNING
In either case, important safety related information is indicated, so by all means, properly observe all that is mentioned.
After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please
explain operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner's
manual.
Moreover, ask the customer to keep this sheet together with the owner's manual.
Please read these "Safety Precautions" first then accurately execute the installation work.
Though the precautionary points indicated herein are divided under two headings, and
those points which are related to the strong possibility of an installation done in error
resulting in death or serious injury are listed in the section. However, there is also a
possibility of serious consequences in relationship to the points listed in the section as well.
- 7 -
3 SAFETY PRECAUTIONS
Commercial Air Conditioner Model: A282FHAHA

When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the designated
refrigerant (please see nameplate) within the refrigeration cycle.
Rupture and injury caused by abnormal high pressure can result from such mixing.
Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this
company can result in water leakage, electric shock, fire and refigerant leakage.
The position of indoor unit must be above the floor 2.5m.
WARNING
Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightening rod or a telephone
ground wire.
Improper placement of ground wires can result in electric shock.
The installation of an earth leakage breaker is necessary depending on the established location of the unit. Not
installing an earth leakage breaker may result in electric shock.
Do not install the unit where there is a concern about leakage of combustible gas.
The rare event of leaked gas collecting around the unit could result in an outbreak of fire.
For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it to
prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.
CAUTION
- 8 -
SAFETY PRECAUTIONS
Commercial Air Conditioner Model: A282FHAHA

190 190
55
70
70
Screw Hole
(M10)
580
Power Wiring Terminal
Power Wiring
Distribution Hole
1018
340
380
840
25
4. Dimensional drawing of outdoor unit
190 190
380
580
>10cm
>10cm
>60cm
>15cm
Installation dimension
of outdoor unit (mm)
More than 60cm
Commercial Air Conditioner Model:
AU282FHAHA
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1
1
1
2
2
2
Outdoor unit
Electronic expansion valve
Electronic expansion valve
Indoor unit
5. Installation instructions
The following is examples:
1) Model: Indoor unit AS092FMAHA AP182FAAHA
2) Model: Indoor unit AS092FMAHA AB142FCAHA
Outdoor unit
Drop height between
indoor and outdoor
units h 30m
Drop height between
indoor h 10m
Drop height between
indoor and outdoor
units h 30m
Drop height between
indoor h 10m
Notice:
1. Designed capacity (total capacity of the whole connected indoor units) while installation
should be not over 130% of rated capacity of the outdoor unit .
2. Total capacity of all running indoor units during usage should be not over 100% of rated
capacity of the outdoor unit.
Commercial Air Conditioner Model: AU282FHAHA
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5.1 Installation diagram of indoor & outdoor unit

3) Model: Indoor unit AS092FMAHA AC142FCAHA
4) Model: Indoor unit AS092FMAHA AS142FTAHA
1
1
2
2
Outdoor unit
1
1
2
2
Outdoor unit
Position
Part
Part
Pipe Gas pipe Liquid pipe
15.88mm
Over 60cm
9.52mm
12.7mm 6.35mm
1
2
>10cm
>10cm
>60cm
>15cm
Drop height between
indoor and outdoor
units h 30m Drop height between
indoor h 10m
Drop height between
indoor and outdoor
units h 30m Drop height between
indoor h 10m
Commercial Air Conditioner Model:
AU282FHAHA
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9.52
6.35 12.7
9.52
75
12.7 9.52
9.52
12.7
15.88
12.7
15.9 9.52
15.88
9.52
12.7
75
model: FQG-B120
<gas side>
<liquid side>
heat preservation
material
heat preservation
material
Dimension is the out diameter connecting to the tubing.
5.2Piping dimensions charts
5.3Y-shape manifold pipe
model
mm inch mm inch
AU55 9.52 3/8" 19.05 3/4"
AB09 6.35 1/4" 12.7 1/2"
AB14 6.35 1/4" 12.7 1/2"
AB18 9.52 3/8" 15.88 5/8"
AC18 9.52 3/8" 15.88 5/8"
AE07 6.35 1/4" 9.52 3/8"
AE09 6.35 1/4" 9.52 3/8"
AE12 6.35 1/4" 12.7 1/2"
AE14 6.35 1/4" 12.7 1/2"
AE18 9.52 3/8" 15.88 5/8"
AE21 9.52 3/8" 15.88 5/8"
AE24 9.52 3/8" 15.88 5/8"
AP18 9.52 3/8" 15.88 5/8"
AS06 6.35 1/4" 9.52 3/8"
AS07 6.35 1/4" 9.52 3/8"
AS09 6.35 1/4" 12.7 1/2"
AS12 6.35 1/4" 12.7 1/2"
AS18 9.52 3/8" 15.88 5/8"
liquid pipe gas pipe
- 12 -
Commercial Air Conditioner Model: A282FHAHA

gas pipe
heat preservation material
liquid pipe
heat preservation material
FQG-B180
Refrigerant pipes between manifold pipes
Total refrigerating amount of indoor unit
g
rou
p
after the manifold
p
i
p
eGas side Liquid side
Less than 38220Btu/h 15.9 9.52
38220~61157Btu/h 19.05 9.52
61157~126137Btu/h 25.4 12.7
Note: 1. Y-shape manifold pipe can be placed in horizontal or vertical
direction
2. The manifold pipes must be welded with hard-solder
3. Pay attention to cut off the unnecessary part from its middle
parts of each joint, and to remove burr.
- 13 -
Commercial Air Conditioner Model: AU282FHAHA

In the file, the figure marked with "√" is permitted, and the figure marked with "×" is prohibited.
You can confirm the position according to the actual condition.
The refrigerant flow direction is always from the collective side to the divided side.
vertical
floor surface
floor surface
floor surface
floor surface
horizontal
floor surface
floor surface
floor surface
floor surface
floor surface
vertical
horizontal
- 14 -
Commercial Air Conditioner Model: AU282FHAHA

5.4The Order of Installation Work
Work Main points
Before installation Work division -to ascertain the person responsible for installation of pipes and wiring
Make installation
diagram -to ascertain the pipe installation dimension and position of electronic expansion valve, to make control wiring system diagram
Work Installation of indoor and
outdoor unit -to prevent the ventilation from short circuit and guarantee repair space
Refrigerant pipe work -Pay attention to dry, clean and seal
Drain pipe work -Slant downward
Heat insulation work -No gaps in the joint of heat insulation material
Wiring work (control
wire, power cord) -Choose the proper wire and cord
Set every set switch -Should be complied with control wiring system diagram
Airtight test -Close all the gas, liquid valves
Vacuum drying -Should the vacuum pump that can reach 200Pa vacuity
Additional refrigerant -Write down the additional refrigerant amount on the outdoor unit body
and record table
Test run adjustment -Do test run to indoor unit one by one to verify if there is wrong pipes
Training of use and
maintenance -Explain to user, simultaneously provide all the documents
The above work order is general knowledge, they may be changed to be complied with the
specific work site.
5.5Attentive matters of safety
lBefore installing, do read this [Attentive matters of safety] carefully to guarantee the
proper installation.
lThe below attentive matters are divided into [warning] and [note] two parts. When the
wrong installation occur, it is very possible death and severe injury and other serious
accidents will happen. For those items are listed in [warning] part. But even the items
listed in [note] part can also cause serious accidents. Above all, both the two parts are
very important contents related to safety, so they must be obeyed.
lAfter installation, do test run to verify everything is normal, after that please explains the
use method and maintenance method to the user according to the operation manual.
Additionally, give the installation manual together with operation manual to the user and
ask them to keep them properly.
Warning
lThe distributing shop, where you bought the air conditioner, or the specified shops shall
do the installation work. If you do the installation work by yourself, the improper
installation will cause water leakage, electric shock fire and other accidents.
lThe installation work shall be in line with what the installation manual specified. If
installation is not proper, water leakage, electric shock, fire and other accidents will
occur.
lInstall the air conditioner to a place where can definitely stand its weight. Places not firm
enough will cause drop down of unit resulting in body hurt.
lThe installation work shall be preventive to typhoon and earthquake. If the installation
Item
- 15 -
Commercial Air Conditioner Model: AU282FHAHA

work is not met with the requirements, overturn of the unit will occur resulting in
accidents.
lThe wiring work shall be done by a qualified person and referred to the “technical
standard of electric equipment”, “indoor wiring regulation” and what the manual
specified. Do use special circuit. If the capacity of the circuit is not enough or bad work,
electric shock, fire and other accidents will happen.
lUsing the specified cable to do wiring work and connecting firmly and properly. Fix the
connecting part of the terminals to prevent it from the external force. Improper
connection and fixing will cause heating and fire etc. accidents.
lWiring shall be kept in correct shape avoiding extrusion. After installation, the electric
box cover and the external panel shall not nip the wire. Improper installation will cause
heating and fire etc. accidents.
lWhen setting or moving the air conditioner do not let the air and things alike get into the
refrigeration system except the specified refrigerant (R22). If air and other things enter,
abnormal high pressure will occur, which easily cause break and body injuries etc.
accidents.
lWhen installing, do use the accessories or specified parts. If not using the parts specified
by our company, water leakage, electric shock, fire and refrigerant leakage will occur.
lDo not lead the drainpipe to drain where the sulfur gas may be involved. Otherwise, the
poisonous gas will enter into the indoor.
lDuring installation, if refrigerant leakage occurs, do the ventilation work immediately. As
soon as the refrigerant gas meets fire, poisonous gas will be produce. If the refrigerant gas
enters into room and meet the air blowing heater, heater or stove etc. fire source, the
poisonous gas may be produced. After installation, confirm there is no leakage of
refrigerant.
lDo not install the unit in a place where the combustible gas may be leaked. In any case
the combustible gas leaks and accumulated around the unit, fire accident will occur.
lDo heat insulation work to the refrigerant gas pipes and liquid pipes to reach the purpose
of heat preservation. If the heat insulation measure is not sufficient, water generated by
condensing dew will drip leading to wet the floor and indoor articles.
lDo not damage the power line or change it arbitrarily to avoid occurrence of fire or
electric shock.
lDo not extend the power line or using other electric appliance in the same power
receptacle to avoid fire or electric shock.
Note
lDo grounding work. Do not connect the grounding wire to gas pipe, tap, lighting rod or
telephone line. Improper grounding will cause electric shock.
lIn some places the electric leakage breaker shall be installed. If do not install the breaker,
electric shock may occur.
lAfter installation, power on to do electric leakage detecting test.
- 16 -
Commercial Air Conditioner Model: AU282FHAHA

Spanner
Joint
Spanners Nut
5.6 Installation procedure Connection of pipes
I. Choosing of pipes
II. Connection of pipes
During installation, if refrigerant leakage
occurs, take ventilation measurement
immediately.
As soon as the leaked refrigerant gas
meets f re, poisonous gas will generate.i
The choosing of pipe material, dimension and branch pipe shall be complied with the
installation figure in page 4~5.
1 Method of pipe connection
The pipe shall be as short as possible to guarantee efficiency.
Daub the refrigerant oil on the connection and flare nut.
When bending the pipes, give the roundness as large as possible, to avoid crashing the
pipes.
To connect the pipe, fit the center and screw the nut with hand, then use spanner or
torque wrench to tighten it. The fastening torque as shown in below table. As shown in
figure.
Be careful alien matters, such as sands, water etc.shall not enter the pipes.
2.Welding of pipes
(1) In welding, the nitrogen shall be used to avo d oxidation of the pipe inner part.
(2) The refrigerating pipe shall use clean new pipes. When working, it shall take steps to
prevent water and dust from entering.
(3) When loosening and tightening the nuts, two spanners shall be used. If using one
spanner, it can not reach the desired degree of tightness.
i
Using the specified fastening torque to fasten nuts.
Pipe diameter(mm)
6.35
9.52
12.7
15.88
Installation torque(N.m)
11.8(1.2kgf.m)
24.5(2.5kgf.m)
49.0(5.0kgf.m)
78.4(8.0kgf.m)
Fastening torque(N.m)
13.7(1.4kgf.m)
29.4(3.0kgf.m)
53.9(5.5kgf.m)
98.0(10.0kgf.m)
Forced fastening without careful
centring may damage the threads
and cause gas leakage.
After finishing installation, confirm the
refrigerant gas does not leak.
If the refrigerant gas leaks in the room,
once it meets heater, burner and gas
stove etc. fire source, the poisonous gas
will generate.
Warning
!
Commercial Air Conditioner Model: AU282FHAHA
- 17 -

Installation procedure Connection of pipe
3.Method of cutting and flaring pipe
A
Cutting and flaring pipe
If using pipe cutter, the burs must be removed.
After inserting flaring machine, flare pipe nozzle to be bell-mouthed.
When using branch pipes, do installation work in the directions
shown in the below figures.
6.35mm(1/4")
9.52mm(3/8")
15.88mm(3/4")
12.70mm(1/2") 2.2~2.6
0.8~1.5
150
Slant Break Crack Partial Too outside
Correct Uncorrect
When using branch pipe, please install it as shown in the following Fig.
Cutting part of branch pipe
Cut the connection part off centrally, and remove the burs.
For the cutting of branch pipes, it is necessary to use micro-cutter.
Heating insulation of pipes
Insulation of branch pipe part;after connection the attached heat insulation materials of the
branch pipe with the site pipes, bind them properly.
Or
Vertical direction
Wrong Correct
Horizontal direction
Flow direction
of refrigerant
Wrong
Connecting direction
Flow direction
of refrigerant
Correct
Cut off in middle
Band properly with tape Insulating material
(Arranged in site)
Insulating material
(Arranged in site)
When joint connecting, no gap shall
be left in the joint, the insulating
material shall be overlapped.
Branch pipe
Insulating material
Connecting pipe in site
Insulating material Insulating material (arranged in site)
Thickness: Over 10mm
Flarer
Diameter of pipe
Dimension
(mm)
A
Commercial Air Conditioner Model:
AU282FHAHA
- 18 -

Installation procedure Connection of pipes
4.Pipe connection of the outdoor unit.
Referring to the installation diagram in page 4, connect the indoor unit, outdoor unit, manifold pipe
and electronic expansion valve together by using the pipe connection method and welding method.
III Test of airtight quality
After connection of the refrigerant pipes, carry out airtight quality test. In this test, pressurize to the
pipes as shown in the below figure by using nitrogen tank.
Close the valves of the gas side and liquid side totally.
The nitrogen may enter the cycle system of the outdoor unit, so that, before pressurizing, the valve rods
must be fastened.(Both the gas side and liquid side)
For each of the refrigerant system, pressurize from the discharge valve of gas side in procedure.
When doing airtight quality test, it is absolutely forbidden to use oxygen, flammable gas and poisonous
gas.
If the hi-pressure valve of the outdoor unit is 3-way valve.
When the hi-pressure valve of the outdoor unit is 2-way valve.
Indoor side
Indoor unit
VL VH
Outdoor side
Joint
Joint
Welding part
Welding part Fasten
Fasten
Stop valve close
(Gas side)
Gas discharging valve
Gas discharging
valve
Stop valve close
Outdoor unit
(Liquid side)
Pressure
reducing
valve
Nitrogen
Instrument
distributor
Low pressure
meter
High pressure
meter
VL VH
Indoor side Outdoor side
Indoor unit
Joint
Joint
Welding part
Welding part Fasten
3-way valve close
(Gas side)
Gas discharging valve
2-way valve
Outdoor unit
(Liquid side)
Pressure
reducing
valve
Nitrogen
Instrument
distributor
Low pressure
meter
High pressure
meter
Fasten
Commercial Air Conditioner Model:
AU282FHAHA
- 19 -