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gauge.
●
The pipe should be anchored every 1.5m or less to isolate the vibration.
●
Do not apply force beyond proper fastening torque in tightening
if changed, should be compensated for.
CAUTION
e)
② In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas under any circumstances.
Fix both liquid and gas service valves at the valve main bodies as illustrated
7) Evacuation
on the right, and then fasten them, applying appropriate fastening torque.
6) Air tightness test
＜
＞
When the system has remaining moisture
① Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness from the service valve's check joint equipped on the outdoor
inside or a leaky point, the vacuum gauge
unit side. While conducting a test, keep the service valve shut all the time.
indicator will rise.
Check the system for a leaky point and
then draw air to create a vacuum again.
8) Additional refrigerant charge
if changed, should be compensated for.
(1) Calculate a required refrigerant charge volume from the following table.
e)
② In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas under any circumstances.
<Single type>
7) Evacuation
Pipe length for
Item
Standard refrigerant
standard refrigerant
charge volume (kg)
Capacity
charge volume (m)
＜
＞
When the system has remaining moisture
inside or a leaky point, the vacuum gauge
200V
3.8
indicator will rise.
0
Check the system for a leaky point and
250V
then draw air to create a vacuum again.
3.6
A160V, A200V
8) Additional refrigerant charge
●
A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0m long refrigerant piping.
●
(1) Calculate a required refrigerant charge volume from the following table.
This unit contains factory charged refrigerant covering 30m of refrigerant piping and additional refrigerant charge on the installation site is not required for an installation with up to 30m refrigerant piping.
When refrigerant piping exceeds 30m, additionally charge an amount calculated from the pipe length and the above table for the portion in excess of 30m.
<Single type>
●
When refrigerant piping is shorter than 3m, reduce refrigerant by 1kg from the factory charged volume and adjust to 4.6kg or 6.2kg.
●
If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size. For further information, see "6. UTILIZATION OF EXISTING PIPING."
Pipe length for
Item
Standard refrigerant
standard refrigerant
Formula to calculate the volume of additional refrigerant required
charge volume (kg)
Capacity
charge volume (m)
In the case of φ9.52mm main liquid piping
Model 200V
3.8
200V
In the case of φ12.7mm main liquid piping
0
Model 250V, A160V, A200V
250V
●
3.6
A160V, A200V
In case of 200V and using φ12.7 at main liquid piping, calculate the amount as follows
●
A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0m long refrigerant piping.
Total charge volume(kg) = Refrigerant volume charged for shipment at the factory + (Main piping length(m)-30(m))x0.145(kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
●
This unit contains factory charged refrigerant covering 30m of refrigerant piping and additional refrigerant charge on the installation site is not required for an installation with up to 30m refrigerant piping.
(2) Charging refrigerant
When refrigerant piping exceeds 30m, additionally charge an amount calculated from the pipe length and the above table for the portion in excess of 30m.
●
When refrigerant piping is shorter than 3m, reduce refrigerant by 1kg from the factory charged volume and adjust to 4.6kg or 6.2kg.
●
Since R410A refrigerant must be charged in the liquid phase, you should charge it, keeping the container cylinder upside down or using a refrigerant cylinder equipped with a siphon tube.
●
If an existing pipe system is used, a required refrigerant charge volume will vary depending on the liquid pipe size. For further information, see "6. UTILIZATION OF EXISTING PIPING."
●
side service port, while running the unit in the cooling mode. In doing so, care must be taken so that refrigerant may be discharged from the cylinder in the liquid phase all the time. When the cylinder valve is throttled down or a dedicated conversion
Formula to calculate the volume of additional refrigerant required
tool to change liquid-phase refrigerant into mist is used to protect the compressor, however, adjust charge conditions so that refrigerant will gasify upon entering the unit.
●
In the case of φ9.52mm main liquid piping
In charging refrigerant, always charge a calculated volume by using a scale to measure the charge volume.
Model 200V
●
In the case of φ12.7mm main liquid piping
Model 250V, A160V, A200V
NOTE
Put down the refrigerant volume calculated from the pipe length onto the label attached on the back side of the service panel.
●
9) Heating and condensation prevention
In case of 200V and using φ12.7 at main liquid piping, calculate the amount as follows
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
Total charge volume(kg) = Refrigerant volume charged for shipment at the factory + (Main piping length(m)-30(m))x0.145(kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
(2) Use a heat insulating material that can withstand 120℃ or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable deterioration.
(2) Charging refrigerant
- Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
●
Since R410A refrigerant must be charged in the liquid phase, you should charge it, keeping the container cylinder upside down or using a refrigerant cylinder equipped with a siphon tube.
- All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation or personal injury from burns
●
side service port, while running the unit in the cooling mode. In doing so, care must be taken so that refrigerant may be discharged from the cylinder in the liquid phase all the time. When the cylinder valve is throttled down or a dedicated conversion
tool to change liquid-phase refrigerant into mist is used to protect the compressor, however, adjust charge conditions so that refrigerant will gasify upon entering the unit.
- Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them together with a connecting
●
In charging refrigerant, always charge a calculated volume by using a scale to measure the charge volume.
cable by a dressing tape.
●
- Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
NOTE
Put down the refrigerant volume calculated from the pipe length onto the label attached on the back side of the service panel.
3. DRAIN PIPING WORK
9) Heating and condensation prevention
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
(2) Use a heat insulating material that can withstand 120℃ or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable deterioration.
Execute drain piping by using a drain elbow and drain grommets supplied
●
separately as option parts, where water drained from the outdoor unit is a
- Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
problem.
- All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation or personal injury from burns
Water may drip where there is a larger amount of drain water. Seal around the drain
●
elbow and drain grommets with putty or adequate caulking material.
Condensed water may flow out from vicinity of service valve or connected pipes.
- Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them together with a connecting
●
Where you are likely to have several days of sub-zero temperatures in a row, do not
cable by a dressing tape.
●
use a drain elbow and drain grommets. (There is a risk of drain water freezing
- Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
inside and blocking the drain.)
Do not use drain elbow and grommet made of plastic for drain piping when base
3. DRAIN PIPING WORK
●
heater for outdoor unit is used. Plastic grommet and elbow will be damaged and
burnt in worst case.
Prepare another drain tray made of metallic material for collecting drain when base
●
Execute drain piping by using a drain elbow and drain grommets supplied
●
heater is used.
separately as option parts, where water drained from the outdoor unit is a
problem.
4. ELECTRICAL WIRING WORK
Water may drip where there is a larger amount of drain water. Seal around the drain
●
elbow and drain grommets with putty or adequate caulking material.
Condensed water may flow out from vicinity of service valve or connected pipes.
●
Where you are likely to have several days of sub-zero temperatures in a row, do not
●
Service valve size
(mm)
φ6.35 (1/4")
φ9.52 (3/8")
φ12.7 (1/2")
φ15.88 (5/8")
φ19.05 (3/4")
Run the vacuum pump for at least one hour after the vacuum gauge shows
-101kPa or lower. (-755mmHg or lower)
left for one hour or more.
Additional charge volume (kg)
Refrigerant volume
Installation's pipe length (m)
per meter of refrigerant piping
charged for shipment
covered without additional
(liquid pipe)
at the factory (kg)
refrigerant charge
Run the vacuum pump for at least one hour after the vacuum gauge shows
0.06 (Liquid piping φ 9.52)
-101kPa or lower. (-755mmHg or lower)
5.6
0.145 (Liquid piping φ 12.7)
30
left for one hour or more.
0.12
7.2
Additional charge volume (kg)
Refrigerant volume
Installation's pipe length (m)
per meter of refrigerant piping
charged for shipment
covered without additional
(liquid pipe)
at the factory (kg)
refrigerant charge
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.06 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
0.06 (Liquid piping φ 9.52)
5.6
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.145 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
0.145 (Liquid piping φ 12.7)
30
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.12 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
0.12
7.2
service
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.06 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.145 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
Additional charge volume (kg) = { Main pipe length (m) – 30 (m) } x 0.12 (kg/m) + Total length of branch pipes (m) x 0.06 (kg/m)
service
Grommet
Drain elbow
For details of electrical cabling, refer to the indoor unit installation manual.
φ15.88
19.7
Tightening torque
Tightening angle
Recommended length
℃, the pressure also fall approximately 0.01 MPa. The pressure,
of a tool handle (mm)
(N-m)
(° )
14〜18
45〜60
150
34〜42
30〜45
200
30〜45
250
49〜61
Use a torque wrench. If a torque wrench is not available,
Airtighteness test completed
68〜82
15〜20
300
Pay attention to the following points in addition to the above for
further, using the left table as a guide.
100〜120
15〜20
450
Vacuuming begins
the R410A and compatible machines.
○To prevent a different oil from entering, assign dedicated tools, etc. to each
Vacuuming completed
refrigerant type. Under no circumstances must a gauge manifold and a charge
hose in particular be shared with other refrigerant types (R22, R407C, etc.).
Vacuum gauge check
○
℃, the pressure also fall approximately 0.01 MPa. The pressure,
the refrigerant system.
Fill refrigerant
<Twin, triple type>
Item
Pipe length for
Standard refrigerant
Airtighteness test completed
standard refrigerant
charge volume (kg)
charge volume (m)
Capacity
Pay attention to the following points in addition to the above for
Vacuuming begins
the R410A and compatible machines.
0.06 (Liquid piping φ 9.52)
3.8
200V
○To prevent a different oil from entering, assign dedicated tools, etc. to each
0.145 (Liquid piping φ 12.7)
Vacuuming completed
0
refrigerant type. Under no circumstances must a gauge manifold and a charge
250V
hose in particular be shared with other refrigerant types (R22, R407C, etc.).
3.6
Vacuum gauge check
○
A160V, A200V
the refrigerant system.
Fill refrigerant
<Twin, triple type>
Item
Pipe length for
Standard refrigerant
standard refrigerant
charge volume (kg)
charge volume (m)
Capacity
*When an additional charge volume calculation result is negative,
0.06 (Liquid piping φ 9.52)
200V
3.8
it is not necessary to charge refrigerant additionally.
0.145 (Liquid piping φ 12.7)
0
250V
3.6
A160V, A200V
*When an additional charge volume calculation result is negative,
it is not necessary to charge refrigerant additionally.
When condensed water needs to be led to a drain, etc., install the
●
unit on a flat base (supplied separately as an optional part) or
concrete blocks.
Then, please secure space for the drain elbow and the drain hose.
Grommet
Drain hose
When condensed water needs to be led to a drain, etc., install the
(To be procured on the installer's part)
●
unit on a flat base (supplied separately as an optional part) or
concrete blocks.
Then, please secure space for the drain elbow and the drain hose.
Do not turn on the power until the electrical work is completeted .
●
φ12.7
Outdoor unit
operation valve
φ15.88
Check joint
Do not hold the valve cap area with a spanner.
Gas side
Outdoor unit
operation valve
Check joint
Additional charge volume (kg)
Refrigerant volume
Installation's pipe length (m)
per meter of refrigerant piping
charged for shipment
covered without additional
(liquid pipe)
at the factory (kg)
refrigerant charge
Main pipe
Branch pipe
5.6
0.06
0.12
0.06
7.2
Additional charge volume (kg)
Refrigerant volume
Installation's pipe length (m)
per meter of refrigerant piping
charged for shipment
covered without additional
(liquid pipe)
at the factory (kg)
refrigerant charge
Main pipe
Branch pipe
0.06
5.6
0.12
0.06
7.2
Band (accessory)
Wires for connecting indoor
and outdoor units
Liquid piping
Band (accessory)
Wires for connecting indoor
and outdoor units
Liquid piping
Clearance
Indoor unit
5. TES
1) Te
W
(1) A
s
(2) S
(3) T
(4) D
2) Ch
C
Indoor unit
Use
unit
As i
dep
1) Te
3) Se
(1) A
s
(1) D
(2) S
・
・
(3) T
(4) D
(2) S
2) Ch
・
30
Use
・
unit
As i
4) Fa
dep
Error
3) S
rem
(1) D
・
・
●
If
(2) S
・
5) Th
30
・
The
4) Fa
Error
Valv
rem
Valv
6)
・ Th
●
If
Pipe cover (accessory)
・
5) T
liq
The
6. UTI
Valv
Valv
Exterior tape
6)
Gas piping
・ Th
Insulation
Pipe cover (accessory)
・
liq
6. UTI
Exterior tape
Gas piping
Insulation
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