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HPU-42HV03

Haier HPU-42HV03 user guide manual

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Commercial Air Conditioning
SERVICE MANUAL
Model
HPU-42CV03
HPU-42HV03
Features
Long distribution pipe and high drop
Optional safety devices and much more precision control device
Auto-restart function
Manual code: SYJS-016-06REV.0
Edition: 2006-06-12
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
CONTENTS
Contents………………………………………………………...1
1. Description of products & features………………………..2
2. Specification…………………………………………………4
3. Safety precaution……………………………………………7
4. Net dimension of indoor and outdoor……………………..9
5. Installation instructions………..……………………………10
6. Parts and functions…………………………………………21
7. Infrared controller functions………………………………..22
8. Refrigerant diagram....………………………………………39
9. Electrical control functions…………………………………41 Diagnostic information (trouble shooting)..……………..47
10.
11. Electrical data....................……………………………….53
1
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
1.DESCRIPTION OF PRODUCTS & FEATURES
1.1. Products code explanation
H P U - 42 C V 03
1.2 Brief Introduction for T1、T2、T3 working condition
Power supply type: 03 stands for 200-220V, 50Hz
Design sequence
C: cooling; H: heating
Cooling capacity: 42=42000BTU/h
U: single split unit
Product type : “B” stands for cassette type, “C” stands for
convertible type, ”D” stands for duct, “S” stands for split
type, ”P” stands for cabinet system, "E" stands for ceiling
concealed type.
Haier Brand Air Conditioner
Climate type
Type of Air
Conditioner
Cooling Only
T1 T2 T3
18 ℃~43℃ 10℃~35℃ 21℃~52℃
Heat pump
-7℃~43℃ -7℃~35℃ -7℃~52℃
Electricity Heating
~43℃ ~35℃ ~52℃
1.3 Operating Range of Air Conditioners
Temp. Mode Rated Maximum Minimum
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
DB ℃ WB ℃ DB ℃ WB ℃ DB ℃ WB ℃ DB ℃ WB ℃
27 32 15
19 23 14
35 43 -5
24 26 6
20 27 10
14.5 --- --
7 23 -10
6 18 ---
2
Commercial Air Conditioner Model: HPU-42CV03
1.5 Product features
1.5.1 Outdoor unit
Flexible and easy installation
The outdoor can meet the higher request of installation. From the specifications, you will find for
each unit, how long and how high the piping will be, which will be convenient for design and installation.
Optional safety devices and much more precision control device
a. Ambient temperature sensor, coil temperature sensor and compressor temperature sensor
make the temperature control and defrosting control more precise.
b. High/low pressure switch can feel the discharging pipe pressure and suction pipe pressure on
time and precisely. If the pressure is too low or too high, it will stop the compressor to prevent it
being damaged for the sake of pressure.
c. 3 minutes delay protection for the compressor, the device can protect the compressor from
some damages and make the compressor have a long life.
Silent operation
.
HPU-42HV03
1.5.2 Steady cabinet indoor unit
Powerfull running & long distance air sending
The unit can run powerfully and supply large volume of cooled air to the room. Long distance and
large angle air sending ensures average temperature distribution, bring you much more comfortable
indoor environment in the shortest time.
Newly designed display panel, more simple
On the display panel there are power, operation, timer, and electric heating indicator, from which
you can find the operation state directly, and the indicator flash times can show the failure.
Malfunction Auto-checking
Failure codes displayed by LED or controllers are so detailed for us to find the fail place more
quickly, and can judge the failure content easily.
Powerfull/Soft function
Special button on remoto controller is used to set powerful working or soft working.
Single fan outdoor, more compact
Central control function, if connected with a detector and a central
controller
3
g
g
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
2. SPECIFICATION
item Model Function Capacity BTU/h Capacity kW Sensible heat ratio Total power input Max. power input
EER or COP
Dehumidifying capacity Power cable section Signal cable section Connecting cable section Wired control cable for wired control unit section Power source N, V, Hz Running /Max.Running current 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)
Fan
Heat exchanger
Dimension
Air sending angle
Indoor unit
Drainage pipe (material , I.D./O.D.) mm Control type (Remote /wired /model) Fresh air hole dimension mm Outlet distribution hole dimension mm Electricity Heater Noise level (H-M-L) Weight (Net / Shipping)
Dimension
Panel
Weight (Net / Shipping) Unit model (color)
Compressor
Fan
Heat exchanger
Outdoor unit
Dimension
Drainage pipe (material , I.D./O.D.) mm Refrigerant control method mm/mm Defrosting Volume of Accumulator L Noise level dB(A) Type of Four way valve material of reduce noise crankcase heater power W Weight (Net / Shipping)
Refrigerant
Pipe
PIPING
Connecting Method
Between I.D &O.D
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 The noise level will be measured in the third octave band limited values, using a Real Time Analyser calibrated sound intensity meter. It is a sound pressure noise level. The detailed method please refer to the following information:
Type × Number Speed(H-M-L) r/min Fan motor output power kW Air-flow(H-M-L) m³/h Type / Diameter mm Total Area m² Temp. scope External Package
External Package
Model / Manufacture Oil model Oil type Oil charging Type Protection type Starting method Type × Number Speed r/min Fan motor output power kW Air-flow(H-M-L) m³/h Type / Diameter mm Row / Fin pitch Temp. scope External Package
Type / Charge g Recharge quantity g/m Liquid mm Gas mm
MAX.Drop 30 MAX.Piping length 50
（L×W×H） （L×W×H）
（L×W×H） （L×W×H）
（L×W×H） （L×W×H）
W W 4400
W/W
10‐³×m³/h
A / A
℃
mm×mm×mm
mm×mm×mm
kW
dB(A)
kg / kg
mm×mm×mm
mm×mm×mm
kg / kg
℃
mm×mm×mm
mm×mm×mm
kg / kg
m m
coolin
41000 ----
12.0 70% ----
3700 ----
3.24 ----
//
Cooling 6.9A/7.8A Heating 7.0/8.3
CLASS I ----
2.8 ----
2.8 ----
HPU-42CV03
5.0
5G×2.5mm
4G×0.75mm
3N，380-400V，50HZ
50
20
HPU-42CV03(WHITE)
centrifugal
430/405/370
0.09
1750
inner grooved/φ7
0.45
1850×600×350 1980×660×420
Remote
/
/
51
59/70
/ / /
HPU-42CV03(WHITE)
VR54KS-TFP-542/COPELAND
3GS
1360
SCROLL
Inner thermal protection
hard startup
Axial*2
840
0.06
6000
inner grooved/φ9.52
2/1.6
948*340*1250
1090*410*1350
Capillary tube
Automatic
/
59
/ / /
106/111
R22/3400
65
φ9.52
φ19.05
Flared
heatin
2
2
----
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
item Model Function Capacity BTU/h Capacity kW Sensible heat ratio Total power input Max. power input
EER or COP
Dehumidifying capacity Power cable section Signal cable section Connecting cable section Wired control cable for wired control unit section Power source N, V, Hz Running /Max.Running current 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)
Fan
Heat exchanger
Dimension
Air sending angle
Indoor unit
Drainage pipe (material , I.D./O.D.) mm Control type (Remote /wired /model) Fresh air hole dimension mm Outlet distribution hole dimension mm Electricity Heater / Noise level (H-M-L) Weight (Net / Shipping)
Dimension
Panel
Weight (Net / Shipping) Unit model (color)
Compressor
Fan
Heat exchanger
Outdoor unit
Dimension
Drainage pipe (material , I.D./O.D.) mm Refrigerant control method mm/mm Defrosting Volume of Accumulator L Noise level dB(A) Type of Four way valve material of reduce noise crankcase heater power W Weight (Net / Shipping)
Refrigerant
Pipe
Connecting Method
PIPING
Between I.D &O.D
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 The noise level will be measured in the third octave band limited values, using a Real Time Analyser calibrated sound intensity meter. It is a sound pressure noise level. The detailed method please refer to the following information:
Type × Number Speed(H-M-L) r/min Fan motor output power kW Air-flow(H-M-L) m³/h Type / Diameter mm Total Area m² Temp. scope External Package
External Package
Model / Manufacture Oil model Oil type Oil charging Type Protection type Starting method Type × Number Speed r/min Fan motor output power kW Air-flow(H-M-L) m³/h Type / Diameter mm Row / Fin pitch Temp. scope External Package
Type / Charge g Recharge quantity g/m Liquid mm Gas mm
MAX.Drop MAX.Piping length 50
（L×W×H） （L×W×H）
（L×W×H） （L×W×H）
（L×W×H） （L×W×H）
W W 4400
W/W
10‐³×m³/h
A / A
℃
mm×mm×mm
mm×mm×mm
kW
dB(A)
kg / kg
mm×mm×mm
mm×mm×mm
kg / kg
℃
mm×mm×mm
mm×mm×mm
kg / kg
m m
cooling heating
41000 44000
12.0 13.0 70%
3700 4000
3.24 3.25
//
Cooling 6.9A/7.8A Heating 7.0/8.3
CLASS I CLASS I
2.8 2.8
2.8 2.8
HPU-42HV03
5.0
5G×2.5mm
4G×0.75mm
3N，380-400V，50HZ
HPU-42HV03(WHITE)
centrifugal
430/405/370
inner grooved/φ7
1850×600×350 1980×660×420
HPU-42HV03(WHITE)
VR54KS-TFP-542/COPELAND
Inner thermal protection
hard startup
inner grooved/φ9.52
948*340*1250
1090*410*1350
Capillary tube
Automatic
2
2
50
20
0.09
1750
0.45
Remote
/
51
59/70
/ / /
3GS
1360
SCROLL
Axial*2
840
0.06
6000
2/1.6
/
59
/ /
40
106/111
R22/3400
65
φ9.52
φ19.05
Flared
30
4900
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Installation state: the unit should be placed on the flat floor or be mounted in horizontal direction. Testing method:
standing-on-floor unit: If the unit cooling capacity is over 28000W, the noise level should be measured at the front, left, right directions respectively.
1m
1m
outdoor unit:
1.air outlet from side: the noise level is the average sound pressure level measured from front, left, right directions.
2.air outlet from top: the noise level is the average sound pressure level measured from front, back, left, right directions. measured point: H ( height to the ground) = (h (unit height) + 1m) /2 and, it is 1m to each side.
1m
1m
1m
h
1m
Note: ⊙ is the real time
6
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
3. Safety precaution of indoor and outdoor
Carefully read the following information in order to operate the airconditioner correctly.
Below are listed three kinds of Safety Cautions and Suggestions.
WARNING! CAUTION!
INSTRUCTIONS: These information can ensure the correct operation of the machine.
Be sure to conform with the following important Safety Cautions.
The Safety Cautions should be at hand so that they can be checked at any time when needed.
If the conditioner is transferred to the new user, this manual should be as well transferred to the new user.
Incorrect operations may result in severe consequences of death or serious injuries.
Incorrect operations may result in injuries or machine damages; in some cases may cause serious consequences.
WARNING!
If any abnormal phenomena is found (e. g.smell of firing), please cut off the power supply immediately, and contact the dealer to find out the handling method.
In such case, to continue using the conditioner will damage the conditioner, and may cause electrical shock or fire hazard.
switch
off
After a long time use of air-conditioner the base should be checked for any damages.
If the damaged base is not repaired, the unit may fall down and cause accidents.
Don't dismantle the outlet of the outdoor unit.
The exposure of fan is very dangerous whichmay harm human beings.
When need maintenance and repairment, call dealer to handle it.
Incorrect maintenance and repairment may cause water leak, electrical shock and fire hazard.
7
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Installed electrical-leaking circuit breaker.
It easily cause electrical shock without circuit breaker.
Air-conditioner can't be installed in the environment with inflammable gases because the inflammable gases near to air-conditioner may cause fire hazard.
WARNING!
No goods or nobody is permitted to placed on or stand on outdoor unit.
The falling of goods and people may cause accidents.
Please let the dealer be responsible for installing the conditioner.
Incorrect installation may cause water
leak, electrical shock and fire hazard.
Call the dealer to take measures to
prevent the refrigerant from leaking.
If conditioner is installed in a small
room be sure to take every measure in
order to prevent suffocation accident
even in case of refrigerant leakage.
When conditioner is deinstalled or
reinstalleddealer should be responsible
Incorrect installation may cause water
leaking, electrical shock and fire hazard.
for them.
Don't operate the air-conditioner with damp hands.
Otherwise will be shocked.
Only use correctly-typed fuse.
May not use wire or any other materials replacing fuse, other-wise may cause faults or fire accidents.
Connect earthing wire.
Earthing wire should not be con­nected to the gas pipe, water pipe, lightning rod or phone line, in-correct earthing may cause shock.
Earthing
Use discharge pipe correctly to ensure efficient discharge.
Incorrect pipe use may cause water leaking.
8
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
4. Net dimension of indoor and outdoor
1818
38
185 185
70
580
30 52
380
1250
38
Screw Hole
(M10)
950
340
88
Power wiring Terminal
25
350
1851
16
600
350
336
500
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
5. Installation Instructions
5.1 Outdoor unit installation
Necessary Tools:
1.Screwdriver
2.Hacksaw
3.70mm diameter hole drill
4.Spanner(dia.17,27mm)
5.Spanner(dia.14,17,27mm)
6.Pipe cutter
7.Flaring tool
8.Knife
9.Nipper
10.Gas leakage detector
or soap water
11.Tape measure
12.Reamer
13.Refrigerant oil
Installation Position
●Place strong enough to support the unit weight, and will not cause vibration and noise.
●Place where discharged air and noise do not cause interference to the neighbors, and is sufficiently
ventilated.
●Place where is less affected by rain or direct sunlight and sea breeze.
●Place with enough space to ventilation
●The unit cannot be installed on an unspecified metal frame
●It shall not be less than 2.5m high from the ground to the unit if installed close to the street
●Easy for maintenance
Fixing of the unit
1.Position of the wall hole
The hole through the wall must be decided as per installation place and pipe direction. Please refer to the
installation drawings.
2. Making the wall hole
Drill a hole of 120*70mm with a little slope to the exterior through the wall as follows:
10
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Installation Space
Installation where the area with strong winds.
Install the unit so that the air outlet section of the unit must NOT be faced
toward wind direction.
Fixing of the unit
Fix outdoor unit using M10 bolt to concrete floor horizontally. If installed on the wall or on top of a roof, bracket should be fixed securely to resist earthquake or storms. Use rubber pad during installation against unit vibration.
over 30cm
580
380
over 10cm
over 10cm
over 15cm
over 60cm
Installation dimension of outdoor unit(mm)
190
190
Refrigerant piping
Outline piping
Flare connection
Piping size
Indoor unit
Liquid pipe
Gas pipe
Connect the flare nuts to the pipes, and then flare the pipes.
9.52x0.8mm
15.88x1.0mm
3-way stop valve
Gas pipe
Outdoor
unit
Liquid pipe
2-way stop valve
90+0.5
11
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Precautions for refrigerant piping
Do not twist or crush piping. Be sure that no dust is mixed in piping. Bend piping with as wide angle as possible. Keep insulating both gas and liquid piping. Check flare-connected area for gas leakage.
Piping connection
Connecting method (indoor unit) Apply refrigerant oil at half union as large and flare nut. To bend a pipe, give the roundness as possible not to crush the pipe. When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig. Be careful not to let foreign matters, such as sands enter the pipe.
Forced fastening without centering may damage the threads and cause a gas leakage.
Pipe diameter Liquid pipe 6.35mm Liquid pipe 9.52mm Gas pipe 12.7mm Gas pipe 15.88mm Gas pipe 19.05mm
Fastening torque
14.2-17.2N.m
32.7-39.9N.m
49.5-60.3N.m
61.8-75.4N.m
97.2-118.6N.m
Air discharging method
After finishing connection of refrigerant pipe, it shall perform air tightness test. The air tightness test adopts nitrogen tank to give pressure according to the pipe connection mode as the following figure shown. The gas and liquid valve are all in close state. In order to prevent the nitrogen entering the circulation system of outdoor unit, tighten the valve rod before giving pressure (both gas and liquid valve rods).
Low pressure gauge
Indoor
Outdoor
3-way valve totally closed (Gas side)
High pressure gauge
VL
VH
Meter separator
Completely tightened
Flare part
Discharging valve
Completely tightened
Flare part
Mainhole
Dropping valve
Indoor units
2-way valve totally closed (Liquid side)
Outdoor units
12
Nitrogen tank
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Precautions for refrigerant piping
Do not twist or crush piping. Be sure that no dust is mixed in piping. Bend piping with as wide angle as possible. Keep insulating both gas and liquid piping. Check flare-connected area for gas leakage.
Piping connection
Connecting method (indoor unit) Apply refrigerant oil at half union as large and flare nut. To bend a pipe, give the roundness as possible not to crush the pipe. When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig. Be careful not to let foreign matters, such as sands enter the pipe.
Forced fastening without centering may damage the threads and cause a gas leakage.
Pipe diameter Liquid pipe 6.35mm Liquid pipe 9.52mm Gas pipe 12.7mm Gas pipe 15.88mm Gas pipe 19.05mm
Fastening torque
14.2-17.2N.m
32.7-39.9N.m
49.5-60.3N.m
61.8-75.4N.m
97.2-118.6N.m
Air discharging method
After finishing connection of refrigerant pipe, it shall perform air tightness test. The air tightness test adopts nitrogen tank to give pressure according to the pipe connection mode as the following figure shown. The gas and liquid valve are all in close state. In order to prevent the nitrogen entering the circulation system of outdoor unit, tighten the valve rod before giving pressure (both gas and liquid valve rods).
Indoor units
Indoor
Completely tightened
Completely tightened
Outdoor
Flare part
Flare part
3-way valve totally closed (Gas side)
2-way valve totally closed (Liquid side)
13
Low pressure gauge
High pressure gauge
VL
Discharging valve
Mainhole
Outdoor units
Dropping valve
VH
Meter separator
Nitrogen tank
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
First step: 0.3MPa (3.0kg/cm2g) pressurize over 3 minutes. Second step: 1.5Mpa (15kg/cm2g) pressurize over 3 minutes. Large leakage will be found. Third step: 3.0 MPa (30kg/cm2g) pressurize about 24 hours. Little leakage will be found.
Check if the pressure drops If the pressure does not drop, the unit is passed If the pressure drops, please check the leaking point.
After pressurizing for 24 hours, each 1 C difference of ambient temperature will result in 0.01MPa(0.1kg/cm2g) pressure change. It shall be corrected during test.
Checking the leaking point
From the first to third steps, if the pressure drops, check the leakage in each joint by the sense of hearing, feeling or soap water, etc. to find the leaking point. After confirming the leaking point, welding it again or tighten the nut tightly again.
Piping and indoor unit vacuumizing
Use vacuum pump to perform vacuumizing. It is strictly forbidden to use the refrigerant to remove the air inside the system. After air tightness test and discharging all the nitrogen, connect the vacuum pump as the following figure shown.
Indoor units
It shall use the vacuum pump of (lower than -755mmHg)high vacuum degree and large air
discharging (over 40l/min).
The vacuumizing time depends on the length of the connecting pipe, generally is 1~2 hours.
When vacuumizing, it shall be confirmed both gas and liquid side valves are closed.
If after 2 hours vacuumizing, it cannot reach the vacuum degree below -755mmHg, it can be
vacuumized for other 1 hour.
If after 3 hours vacuumizing, it still cannot reach the vacuum degree below -755mmHg, check
if there is any leaking point and repair the them.
Indoor
Completely tightened
Completely tightened
Outdoor
Flare part
Flare part
3-way valve totally closed (Gas side)
2-way valve totally closed (Liquid side)
14
Low pressure gauge
V L
Discharging valve
Vacuum pump
Outdoor units
High pressure gauge
VH
Meter separator
P
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
If after over 2 hours vacuumizing, the vacuum degree is below -755mmHg, close the V meter separator and stop vacuumizing. 1 hour later to confirm if the vacuum degree changes. If changes,
it indicates there is leaking point in the system. Check the leaking point and repair. After finishing the above vacuumizing, change the vacuum pump into refrigerant pump to charge the refrigerant.
Charging amount of refrigerant
When the total length (L) of the two indoor units' connecting pipe is less than 5m, it is unnecessary to charge additional refrigerant. If the connecting pipe (L) exceeds 5m, it shall charge Mg additional refrigerant per meter. That is: Refrigerant charging amount = (L-5) x M (g) For the unit with liquid pipe 6.35mm, M=30 For the unit with liquid pipe 9.52mm, M=65 Only in COOLING operation can charge the additional refrigerant. When charging, the refrigerant shall be charged from the charging nozzle of low pressure vavle. Be carefull when charging refrigerant, do not let the air mix into the system,and must charge the additional refrigerant in liquid condition.
L and VH on the
Piping connection of outdoor unit. Connect the connecting pipe and inlet and outlet liquid pipe according to the piping method.
Purging method
Discharge the air out of the indoor unit and the refrigerant pipe by vacuumizing
(1) Fasten all the nuts of the indoor and outdoor pipes to make these parts out of leakage.
(2) Under the condition of the complete close of the indoor and outdoor valve center (both liquid and gas side),dismount the repair valve cap.Vacuumizing through the charge mouth of the repair valve.
(3) After vacuumizing fasten the repair valve,and dismount the cap of the big and small stop valve,then loosen the stop valve center completely and fasten the big and small stop valve.
Extra charging amount of the refrigerant
When piping is longer than 5 m, charge additional refrigerant specified in this list.
Pipe length
Refrigerant charge (g)
5m 10m 15m 20m
750 1125375
25m
1500
30m
1875
15
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
5.2 Indoor unit installation
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With the unit set up vertically,fix the fitting metal to the unit with screws, then fix the fitting metal to the wall with cement nail and washer, as shown below:
Cement nail
Fitting metal
Screw
Moreover, if want to fix the unit more firmly, you should fix the bottom panel to the ground with concrete bolts,as shown below:
LQPBLLN OGBC
kU`` h\]W_bYgg
330
2- 10 hole
Fitting hole
4- 14 hole 30 depth
Bottom Panel
16
260
130
79
202
(79)
(202)
Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
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Commercial Air Conditioner Model: HPU-42CV03
HPU-42HV03
Cut away, with a hammer or a saw, the lid for piping according to piping direction.
Insulation material
Copper tube
Drain hose
Connecting electric cable for indoor and outdoor unit
According to the piping method, connect the piping on indoor unit with union of connecting pipe. Arrange the piping as per the wall hole and bind drain hose connecting electric cable and piping together with polyethylene tape. Insert the bound piping connecting electric cable and drain hose through wall hole to connect with outdoor unit.
Arrangement of drain hose Drain hose shall be placed in under place. There should be a slope when arrange drain hose. Avoid up and down waves in drain hose.
Indoor unit
Up
If humidity is high, drain pipe( especially in room and indoor unit ) must be covered with insulation material.
Slope
Good
Down
Bad
18
Commercial Air Conditioner Model: HPU-42CV03
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