1-78
Service Manual
INSTALLATION
(b) Operate the compressor in the cooling mode and charge the additional refrigerant from the check
joint of the liquid stop valve. An acceptable error must fall within 1.1 lbs (0.5 kg). At this time, keep
the liquid stop valve slightly open.
(c) After the refrigerant is charged, fully open the liquid stop valve and the gas stop valve.
(d) Carefully calculate any additional refrigerant quantity for charging. If the quantity of additional
refrigerant is not correct, it might cause a compressor failure. The additional refrigerant must be
charged in a liquid condition.
(e) Refrigerant charge from the check joint on the gas stop valve can lead to compressor failure.
Be sure to charge refrigerant from the check joint on the liquid stop valve.
Charge the correct refrigerant
quantity according to Table 8.1.
If not, a compressor may be
damaged due to an excess or
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Refrigerant charge from check
joint of gas stop valve may lead
to compressor failure. Be sure
to charge refrigerant from the
check joint of liquid stop valve.
Insulate the liquid piping and
gas piping completely to avoid
decreasing of performance and
dewing on the surface of the
pipe.
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of the piping connection with
insulation.
Check to ensure that there
is no gas leakage. If a large
refrigerant leakage occurs, it will
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harmful gases would occur if a
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< Heat Pump System >
< Heat Recovery System >
Outdoor Unit
Stop Valve
(Liquid Line)
Manifold
Gauge
Vacuum Pump
Nitrogen Tank
(for Nitrogen Blow during Brazing
and Airtight Test)
Scale
Indoor Unit
Gas Line
Liquid Line
Multi-Kit
Insulation
Stop Valve
(High/Low Pressure Gas Line)
Stop Valve
(Low Pressure Gas Line)
[Cover the gas and liquid pipe with insulation.]
Siphonic Refrigerant Cylinder
(R410A)
Stop Valve
(Liquid Line)
Stop Valve
(High/Low Pressure Gas Line)
Stop Valve
(Low Pressure Gas Line)
Gas Line (High/Low)
Gas Line (Low)
Liquid Line
Insulation
Insulation
Change-Over
Box
Change-Over
Box
Outdoor Unit
Vacuum Pump
Siphonic Refrigerant Cylinder
(R410A)
Scale
Nitrogen Tank
(for Nitrogen Blow during Brazing
and Airtight Test)
Indoor Unit
Multi-Kit
Manifold
Gauge
[Cover the gas and liquid pipe with insulation.]
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
Page 1795: ......
Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...