HTW IX80S-R32 Service manual

OWNER’S AND INSTALLATION
MANUAL
OUTDOOR UNIT SPLIT
ENGLSIH
IX80S-R32
Thanks for choosing our product.
Please, read carefully this manual
before using the product.
HTWS026IX80SR32-O |HTWS035IX80SR32-O
HTWS052IX80SR32-O |HTWS071IX80SR32-O

Operation Notices
Precautions ........................................................................................................ 1
Parts name.......................................................................................................... 6
Malfunction
Malfunction analysis.......................................................................................... 7
Installation Notice
Safety operation of ammable refrigerant....................................................... 8
Installation prepare.......................................................................................... 10
Installation
Installation of outdoor unit.............................................................................. 14
Check after installation ................................................................................... 17
Test operation................................................................................................... 17
Attachment
Conguration of connection pipe................................................................... 18
Pipe expanding method................................................................................... 19
Content
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.
If it needs to install, move or maintain the air conditioner, please contact dealer or local service
center to conduct it at rst. Air conditioner must be installed, moved or maintained by appointed
unit. Otherwise, it may cause serious damage or personal injury or death.
R32:675

1
Precautions
Please read this operating manual carefully before operating the unit.
Appliance lled with ammable gas R32.
Before use the appliance, read the owner's manual rst.
Befoer install the appliance,read the installation manual rst.
Befoer repair the appliance ,read the service manual rst.
The gures in this manual may be different with the material objects, please refer to the
material objects for reference.
To realize the function of the air conditioner unit, a special refrigerant circulates in the system.
The used refrigerant is the uoride R32, which is specially cleaned. The refrigerant is
ammable and inodorous. Furthermore, it can leads to explosion under certain condition.
But the ammability of the refrigerant is very low. It can be ignited only by re.
Compared to common refrigerants, R32 is a nonpolluting refrigerant with no harm to the
ozonosphere. The inuence upon the greenhouse effect is also lower. R32 has got very
good thermodynamic features which lead to a really high energy efficiency. The units
therefore need a less lling.
The Refrigerant
WARNING:
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacture. Should repair be necessary, contact your nearest
authorized Service Center.
Any repairs carried out by unqualied personnel may be dangerous.
The appliance shall be stored in a room without continuously operating ignition sources.
(For example: open ames, an operating gas appliance or an operating electric heater.)
Do not pierce or burn.
Appliance shall be installed, operated and stored in a room with a oor area larger than
“X”m2 (see table 1). (only applies to appliances that are not xed appliances)
Appliance lled with ammable gas R32. For repairs,strictly follow manufacturer's
instructions only.
Be aware that refrigerants not contain odour.
Read specialist’s manual.

2
This appliance can be used by children aged of 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.
Do not connect air conditioner to multi-purpose socket.
Otherwise, it may cause re hazard.
Do disconnect power supply when cleaning air conditioner.
Otherwise, it may cause electric shock.
If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualied persons in
order to avoid a hazard.
Do not wash the air conditioner with water to avoid electric
shock.
Do not spray water on indoor unit. It may cause electric shock
or malfunction.
After removing the lter, do not touch ns to avoid injury.
Do not use re or hair dryer to dry the lter to avoid deformation
or re hazard.
Maintenance must be performed by qualied professionals.
Otherwise, it may cause personal injury or damage.
Do not repair air conditioner by yourself. It may cause electric
shock or damage. Please contact dealer when you need to
repair air conditioner.
Do not extend ngers or objects into air inlet or air outlet. It may
cause personal injury or damage.
Precautions
Operation and Maintenance
WARNING

3
Attachment
Installation must be performed by qualied professionals.
Otherwise, it may cause personal injury or damage.
Must follow the electric safety regulations when installing the
unit.
According to the local safety regulations, use qualied power
supply circuit and circuit break.
Do install the circuit break. If not, it may cause malfunction.
An all-pole disconnection switch having a contact separation of
at least 3mm in all poles should be connected in xed wiring.
Air Conditioner should be properly grounded. Incorrect
grounding may cause electric shock.
Do not block air outlet or air inlet. It may cause malfunction.
Do not spill water on the remote controller, otherwise the
remote controller may be broken.
When below phenomenon occurs, please turn off air conditioner
and disconnect power immediately, and then contact the dealer
or qualied professionals for service.
● Power cord is overheating or damaged.
● There’s abnormal sound during operation.
● Circuit break trips off frequently.
● Air conditioner gives off burning smell.
● Indoor unit is leaking.
If the air conditioner operates under abnormal conditions, it
may cause malfunction, electric shock or re hazard.
When turning on or turning off the unit by emergency operation
switch, please press this switch with an insulating object other
than metal.
Do not step on top panel of outdoor unit, or put heavy objects.
It may cause damage or personal injury.
Precautions WARNING

4
Including an circuit break with suitable capacity, please note the
following table.Air switch should be included magnet buckle
and heating buckle function, it can protect the circuit-short and
overload.
Don't use unqualied power cord.
Make sure the power supply matches with the requirement of
air conditioner.Unstable power supply or incorrect wiring or
malfunction. Please install proper power supply cables before
using the air conditioner.
Properly connect the live wire, neutral wire and grounding wire
of power socket.
Be sure to cut off the power supply before proceeding any work
related to electricity and safety.
Do not put through the power before nishing installation.
If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualied persons in
order to avoid a hazard.
The temperature of refrigerant circuit will be high, please keep
the interconnection cable away from the copper tube.
The appliance shall be installed in accordance with national
wiring regulations.
Installation must be performed in accordance with the
requirement of NEC and CEC by authorized personnel only.
The air conditioner is the rst class electric appliance. It must
be properly grounding with specialized grounding device
by a professional. Please make sure it is always grounded
effectively, otherwise it may cause electric shock.
The yellow-green wire in air conditioner is grounding wire,
which can't be used for other purposes.
The grounding resistance should comply with national electric
safety regulations.
Precautions WARNING

5
Working temperature range
NOTE:
The operating temperature range (outdoor temperature) for cooling is 18℃~43℃; Heating
temperature range for the model without electric heating belt for chassis is -15℃ ~ 24℃;
Heating temperature range for the model with electric heating belt for chassis is
-20℃~24℃.
Indoor side DB/WB(°C) Outdoor side DB/WB(°C)
Maximum cooling 32/23 43/26
Maximum heating 27/- 24/18
The appliance must be positioned so that the plug is accessible.
All wires of indoor unit and outdoor unit should be connected
by a professional.
If the length of power connection wire is insufcient, please
contact the supplier for a new one. Avoid extending the wire by
yourself.
For the air conditioner with plug, the plug should be reachable
after nishing installation.
For the air conditioner without plug, an circuit break must be
installed in the line.
If you need to relocate the air conditioner to another place, only
the qualied person can perform the work. Otherwise, it may
cause personal injury or damage.
Select a location which is out of reach for children and far away
from animals or plants.If it is unavoidable, please add the fence
for safety purpose.
The indoor unit should be installed close to the wall.
Precautions WARNING

6
Parts name
Air inlet
Handle
Air outlet
Actual product may be different from above graphics,please refer to actual products.
NOTE:

7
General phenomenon analysis
Please check below items before asking for maintenance. If the malfunction still can't be
eliminated,please contact local dealer or qualied professionals.
Phenomenon Check items Solution
Air conditioner
can’t operate
Power failure? Wait until power recovery.
Is plug loose? Reinsert the plug.
Circuit break trips off or fuse is
burnt out?
Ask professional to replace circuit
break or fuse.
Wiring has malfunction? Ask professional to replace it
Unit has restarted immediately
after stopping operation?
Wait for 3min, and then turn on the
unit again.
Whether the function setting for
remote controller is correct? Reset the function.
Set temperature
can’t be adjusted
Unit is operating under auto
mode?
Temperature can’t be adjusted under
auto mode.
Please switch the operation mode if
you need to adjust temperature.
Your required temperature exceeds
the set temperature range?
Set temperature range:
16°C~31°C
Cooling (heating)
effect is not good.
Voltage is too low?
Wait until the voltage resumes normal.
Filter is dirty? Clean the lter.
Set temperature is in proper range? Adjust temperature to proper range.
Door and window are open? Close door and window.
Air conditioner
operates normally
suddenly
Whether there’s interference,such
as thunder, wireless devices, etc.
Disconnect power, put back power,
and then turn on the unit again.
Outdoor unit has
vapor
Heating mode is turned on? During defrosting under heating
mode, it may generate vapor, which
is a normal phenomenon.
“ Water owing”
noise
Air conditioner is turned on or
turned off just now?
The noise is the sound of refrigerant
owing inside the unit, which is a
normal phenomenon.
Cracking noise
Air conditioner is turned on or
turned off just now?
This is the sound of friction caused by
expansion and/or contraction of panel
or other parts due to the change of
temperature.
Malfunction analysis

8
Safety operation of ammable refrigerant
Qualication requirement for installation and maintenance man
All the work men who are engaging in the refrigeration system should bear the valid certication
awarded by the authoritative organization and the qualicationfor dealing with the refrigeration
system recognized by this industry. If it needs other technician to maintain and repair the
appliance, they should be supervisedby the person who bears the qualication for using the
ammable refrigerant. It can only be repaired by the method suggested by the equipment’s
manufacturer.
Installation notes
1.The air conditioner is not allowed to use in a room that has running re (such as resource,
working coal gas ware, operating heater).
2.It is not allowed to drill hole or burn the connection pipe.
3.The air conditioner must be installed in a room that is larger than the minimum roomarea.
The minimum room area is shown on the nameplate or following table 1.
4.Leak test is a must after installation.
Minimum
room area
( m2 )
Charge amount (kg) ≤1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5
oor location / 14.5 16.8 19.3 22.0 24.8 27.8 31.0 34.4 37.8 41.5 45.4 49.4 53.6
window mounted / 5.2 6.1 7.0 7.9 8.9 10.0 11.2 12.4 13.6 15 16.3 17.8 19.3
wall mounted / 1.6 1.9 2.1 2.4 2.8 3.1 3.4 3.8 4.2 4.6 5 5.5 6.0
ceiling mounted / 1.1 1.3 1.4 1.6 1.8 2.1 2.3 2.6 2.8 3.1 3.4 3.7 4.0
Maintenance notes
Check whether the maintenance area or the room area meet the requirement of the
nameplate.
—It’s only allowed to be operated in the rooms that meet the requirement of the
nameplate.
Check whether the maintenance area is well-ventilated.
—The continuous ventilation status should be kept during the operation process.
Check whether there is re source or potential re source in the maintenance area.
—The naked ame is prohibited in the maintenance area; and the “no smoking” warning
board should be hanged.
Check whether the appliance mark is in good condition.
— Replace the vague or damaged warning mark.
Table 1:Minimum room area (m2)

9
Safety operation of ammable refrigerant
Filling the refrigerant
1. Use the refrigerant lling appliances specialized for R32. Make sure that different kinds
of refrigerant won’t contaminate with each other.
2. The refrigerant tank should be kept upright at the time of lling refrigerant.
3. Stick the label on the system after lling is nished (or haven’t nished).
4. Don’t overlling.
5. After lling is nished, please do the leakage detection before test running; another time
of leak detection should be done when it’s removed.
Safety instructions for transportation and storage
1. Please use the ammable gas detector to check before unload and open the container.
2. No re source and smoking.
3. According to the local rules and laws.
Welding
If you should cut or weld the refrigerant system pipes in the process of maintaining, please
follow the steps as below:
1. Shut down the unit and cut power supply.
2. Eliminate the refrigerant.
3. Vacuuming.
4. Clean it with N2 gas.
5. Cutting or welding.
6. Carry back to the service spot for welding.
The refrigerant should be recycled into the specialized storage tank.
Make sure that there isn’t any naked ame near the outlet of the vacuum pumpand it’s
well-ventilated.

10
Drainage pipe
At least 50cm
Space to the
obstruction
Space to the obstruction
At least 30cm
Space to the wall
At least 30cm
Space to the obstruction
At least 15cm
At least 200cm
Space to
the obstruction
Installation prepare
Installation drawing
1 Level meter 2 Screw driver 3 Impact drill
4 Drill head 5 Pipe expander 6 Torque wrench
7 Open-end wrench 8 Pipe cutter 9 Leakage detector
10 Vacuum pump 11 Pressure meter 12 Universal meter
13 Inner hexagon spanner 14 Measuring tape
Tools
Selection of location
Basic requirement
Installing the unit in the following places maycause malfunction. If it is unavoidable, please
consult the local dealer:
1. The place with strong heat sources, vapors, ammable or explosive gas, or volatile
objects spread in the air.
2. The place with high-frequency devices (such as welding machine,medical equipment).
3. The place near coast area.
4. The place with oil or fumes in the air.
5. The place with sulfureted gas.
6. Other places with special circumstances.
7. The appliance shall not be installed in the laundry.

11
Outdoor unit
1. Select a location where the noise and out ow air emitted by the outdoor unit will not affect
neighborhood.
2. The location should be well ventilated and dry, in which the outdoor unit won't be exposed
directly to sunlight or strong wind.
3. The location should be able to withstand the weight of outdoor unit.
4. Make sure that the installation follows the requirement of installation dimension diagram.
5. Select a location which is out of reach for children and far away from animals or plants.If
it is unavoidable, please add the fence for safety purpose.
Installation prepare
Safety precaution
1. Must follow the electric safety regulations when installing the unit.
2. According to the local safety regulations, use qualied power supply circuit and circuit
break.
3. Make sure the power supply matches with the requirement of air conditioner. Unstable
power supply or incorrect wiring or malfunction. Please install proper power supply cables
before using the air conditioner.
4. Properly connect the live wire, neutral wire and grounding wire of power socket.
5. Be sure to cut off the power supply before proceeding any work related to electricity and
safety.
6. Do not connect the power before nishing inatallation.
7. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualied persons in order to avoid a hazard.
8. The temperature of refrigerant circuit will be high, please keep the interconnection cable
away from the copper tube.
9. The appliance shall be installed in accordance with national wiring regulations.
10. Installation must be performed in accordance with the requirement of NEC and CEC by
authorized personnel only.
11. Appliance shall be installed, operated and stored in a room with a oor area larger than
“X”m2 (see table 1).
Please notice that the unit is filled with flammable gas R32. Inappropriate
treatment of the unit involves the risk of severe damages of people
andmaterial. Details to this refrigerant are found in chapter "refrigerant".

12
Installation prepare
Grounding requirement
1. The air conditioner is the rst class electric appliance. It must be properly grounding with
specialized grounding device by a professional. Please make sure it is always grounded
effectively, otherwise it may cause electric shock.
2. The yellow-green wire in air conditioner is grounding wire, which can't be used for other
purposes.
3. The grounding resistance should comply with national electric safety regulations.
4. The appliance must be positioned so that the plug is accessible.
5. An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in xed wiring. For models with a power plug, make sure the plug is
within reach after installation.
6. Including an circuit break with suitable capacity, please note the following table. Circuit
break should be included magnet buckle and heating buckle function, it can protect the
circuit-short and overload. (Caution: please do not use the fuse only for protect the circuit)
Air-conditioner Circuit break capacity Minimum Sectional Area
of Power Cable (mm2)
09K、12K 10A 3G1.0
18K 16A 3G1.5
24K 25A 3G2.5
1. When installing or relocating the unit, be sure to keep the refrigerant circuit free
from air or substances other than the specied refrigerant.
— Any presence of air or other foreign substance in the refrigerant circuit will cause system
pressure rise or compressor rupture, resulting in injury.
2. When installing or moving this unit, do not charge the refrigerant which is not
comply with that on the nameplate or unqualied refrigerant.
— Otherwise, it may cause abnormal operation, wrong action, mechanical malfunction or
even series safety accident.
3. When refrigerant needs to be recovered during relocating or repairing the unit,
be sure that the unit is running in cooling mode. Then, fully close the valve at high
pressure side (liquid valve). About 30-40 seconds later, fully close the valve at low
To ensure safety, please be mindful of the following precautions.
WARNING
Safety precautions for installing and relocating the unit

13
Installation prepare
pressure side (gas valve), immediately stop the unit and disconnect power. Please
note that the time for refrigerant recovery should not exceed 1 minute.
— If refrigerant recovery takes too much time, air may be sucked in and cause pressure
rise or compressor rupture, resulting in injury.
4. During refrigerant recovery, make sure that liquid valve and gas valve are fully
closed and power is disconnected before detaching the connection pipe.
— If compressor starts running when stop valve is open and connection pipe is not yet
connected, air will be sucked in and cause pressure rise or compressor rupture, resulting
in injury.
5. When installing the unit, make sure that connection pipe is securely connected
before the compressor starts running.
— If compressor starts running when stop valve is open and connection pipe is not yet
connected, air will be sucked in and cause pressure rise or compressor rupture,
resulting in injury.
6. Prohibit installing the unit at the place where there may be leaked corrosive gas or
ammable gas.
— If there leaked gas around the unit, it may cause explosion and other accidents.
7. Do not use extension cords for electrical connections. If the electric wire is not
long enough, please contact a local service center authorized and ask for a proper
electric wire.
— Poor connections may lead to electric shock or re.
8. Use the specied types of wires for electrical connections between the indoor
and outdoor units. Firmly clamp the wires so that their terminals receive no
external stresses.
— Electric wires with insufcient capacity, wrong wire connections and insecure wire
terminals may cause electric shock or re.

14
Step 1: Fix the support of outdoor
Select it according to the actual installation situation
1. Select installation location according to the house structure.
2. Fix the support of outdoor unit on the selected location with expansion screws.
Note:
● Take sufcient protecttive measures when installing the
outdoor unit.
● Make sure the support can withstand at least four times
of the unit weight.
● The outdoor unit should be installed at least 3cm above
the the oor in order to install drainjoint.
● For the unit with cooling capacity of 2300W~5000W, 6
expansion screws are needed; for the unit with cooling
capacity of 6000W~8000W, 8 expansion screws are
needed; for the unit with cooling capacity of 10000W
~16000W, 10 expansion screws are needed.
Step 2: Install drain joint and chasis rubber plug
1. Connect the outdoor drain joint into the hole on
the chassis, as shown in the picture below.
2. Connect the drain hose into the drain vent.
3. For chasis eletric heater equiped unit, there are
several drain holes on the chasis, which is used
for quick drainage to avoid chasis freeze in cold
area. If there is no need for quick drainage, please
x the rubber plug into chasis. According to drain
hole shape, select corresponding plug to x into
holes from the bottom, shown as the left.
Note:
There is no drain joint and chasis rubber plug for
some unit, please refer to accessary package.
Step 3: Fix outdoor unit
1. Place the outdoor unit on the support.
2. Fix the foot holes of outdoor unit with bolts.
at least 3cm above
the the oor
drain joint
chasis rubber plug
foot holes
Installation of outdoor unit

15
Step 4: Connect indoor and outdoor pipe
union nut
pipe joint
1. Remove the screw on the right handle of
outdoor unit and then remove the handle.
2. Remove the screw cap of valve and aim
the pipe joint at the bellmouth of pipe.
3. Pretightening the union nut with hand. 4. Tighten the union nut with torque wrench
by referring to the sheet below.
handle
liquid valve
gas valve
Hex nut diameter Tightening torque (N.m)
Φ 6 15~20
Φ 9.52 30~40
Φ 12 45~55
Φ 16 60~65
Φ 19 70~75
Step 5: Connect indoor and outdoor pipe
1. Remove the wire clip; connect the power connection wire and signal control wire (only for
cooling and heating unit) to the wiring terminal according to the color,x them with screws.
2. Fix the power connection wire and signal control wire with wire clip (only for cooling and
heating unit).
Note:
● After tighten the screw,pull the power cord slightly to check if it is rm.
● Never cut the power connection wire to prolong or shorten the distance.
N(1) 23N
NL
L
Indoor unit connection
Power
brown brown
yellow-
green
yellow-
green
blue blue black
Installation of outdoor unit

16
Step 6: Neaten the pipes
U-shaped curve
wall
drain hose
1. The pipes should be placed along the wall, bent
reasonably and hidden possibly. Min.semidiameter of
bending the pipe is 10cm.
2. If the outdoor unit is higher than the wall hole, you
must set a U-shaped curve in the pipe before
pipe
goes into the room, in order to prevent rain from
getting into the room.
Installation of outdoor unit
Use vacuum pump
1. Remove the valve caps on the liquid valve
and gas valve and the nut of refrigerant
charging vent.
2. Connect the charging hose of piezometer
to the refrigerant charging vent of gas
valve and then connect the other charging
hose to the vacuum pump.
3. Open the piezometer completely and ope-
rate for 10-15min to check if the pressure
of piezometer remains in -0.1MPa.
4. Close the vacuum pump and maintain this
status for 1-2min to check if the pressure
of piezometer remains in -0.1MPa. If the
pressure decreases, there may be leakage.
1. With leakage detector:
Check if there is leakage with leakage detector.
2. With soap water:
If leakage detector is not available, please use soap water for leakage detection.
Apply soap water at the suspected position and keep the soap water for more than 3min. If
there are air bubbles coming out of this position, there's a leakage.
liquid valve
gas valve
refrigerant
charging vent
nut of refrigerant
charging vent
vacuum pump
piezometer
valve cap
Lo Hi
inner hexagon
spanner
open
close
Step 8: Leakage detection
Step 7: Vacuum pumping
5. Remove the piezometer, open the valve core of liquid valve and gas valve completely
with inner hexagon spanner.
6. Tighten the screw caps of valve and refrigerant charging vent.
7. Reinstall the handle.

17
Check according to the following requirement after nishing installation.
Items to be checked Possible malfunction
Has the unit been installed rmly? The unit may drop, shake or emit noise.
Have you done the refrigerant leakage
test?
It may cause in sufcient cooling (heating)
capacity.
Is heat insulation of pipeline sufcient? It may cause condensation and water dripping.
Is water drained well? It may cause condensation and water dripping.
Is the voltage of power supply according
to the voltage marked on the
nameplate?
It may cause malfunction or damaging the parts.
Is electric wiring and pipeline installed
correctly? It may cause malfunction or damaging the parts.
Is the unit grounded securely? It may cause electric leakage.
Does the power cord follow the
specication? It may cause malfunction or damaging the parts.
Is there any obstruction in the air inlet
and outlet?
It may cause in sufcient cooling(heating)
capacity.
The dust and sundries caused during
installation are removed? It may cause malfunction or damaging the parts.
The gas valve and liquid valve of
connection pipe are open completely?
It may cause in sufcient cooling(heating)
capacity.
1. Preparation of test operation
● The client approves the air conditioner.
● Specify the important notes for air conditioner to the client.
2. Method of test operation
● Connect the power, press "ON/OFF" button on the remote controller to start operation.
● Press "MODE" button to select AUTO, COOL, DRY, FAN and HEAT to check whether
the operation is normal or not.
● If the ambient temperature is lower than 16°C, the air conditioner can’t start cooling.
Check after installation
Test operation

18
1. Standard length of connection pipe
● 5m, 7.5m, 8m.
2. Min length of connection pipe
For the unit with standard connection pipe of 5m, there is no limitation for the min length
of connection pipe. For the unit with standard connection pipe of 7.5m and 8m, the min
length of connection pipe is 3m.
3. Max. length of connection pipe and max. high difference.
Cooling capacity Max length of
connection pipe Cooling capacity Max length of connection pipe
5000Btu/h (1465W) 15 24000Btu/h (7032W) 25
7000Btu/h (2051W) 15 28000Btu/h (8204W) 30
9000Btu/h (2637W) 15 36000Btu/h (10548W) 30
12000Btu/h (3516W) 20 42000Btu/h (12306W) 30
18000Btu/h (5274W) 25 48000Btu/h (14064W) 30
4. The additional refrigerant oil and refrigerant charging required after prolonging connection
pipe
● After the length of connection pipe is prolonged for 10m at the basis of standard length,
you should add 5ml of refrigerant oil for each additional 5m of connection pipe.
● The calculation method of additional refrigerant charging amount (on the basis of liquid
pipe): Additional refrigerant charging amount = prolonged length of liquid pipe ×
additional refrigerant charging amount per meter
● Basing on the length of standard pipe, add refrigerant according to the requirement
as shown in the table. The additional refrigerant charging amount per meter is different
according to the diameter of liquid pipe. See the following sheet.
Additional refrigerant charging amount for R32
Diameter of connection pipe Indoor unit throttle Outdoor unit throttle
Liquid pipe(mm) Gas pipe(mm)
Cooling only,
cooling and heating
(g/m)
Cooling only
(g/m)
Cooling and
heating
(g/m)
Φ6 Φ9.52 or Φ12 16 12 16
Φ6 or Φ9.52 Φ16 or Φ19 40 12 40
Φ12 Φ19 or Φ22.2 80 24 96
Φ16 Φ25.4 or Φ31.8 136 48 96
Φ19 -200 200 200
Φ22.2 -280 280 280
Conguration of connection pipe
Note:
The additional refrigerant charging amount in Sheet is recommended value, not compulsory.