18
Installation Procedure
English
Installation Pr
oc
edur
e
Tightening torque for body cap
(Refer to the table)
Spindle
Charging core
Charging port cap
ŵࣛߤߤࡑÜɇ͔ʪϩʪθͱ˙ϩ˵ʪ
screw-7/16-20UNF
R-410A: Diameter of
the screw-1/2-20UNF
Vacuum
Pump
â
७७७
MCS
७
A²
3
Open the valve of the low pressure side of manifold
gauge counter clockwise.
4
Purge the air from the system using vacuum pump for
about 30 minutes.
• Close the valve of the low pressure side of manifold
gauge clockwise.
• Make sure that pressure gauge show -14.5 psi after
about 30 minutes. This procedure is very important
in order to avoid gas leak.
• Turn off the vacuum pump.
• Remove the hose of the low pressure side of
manifold gauge.
5
Set spindle of both liquid side and gas side of stop
valve to the open position.
6
Mount the valve stem nuts and the service port cap to
the valve, and tighten them with a torque wrench.
Outer Diameter
(inch)
Tightening torque
Body cap
(lbf·ft)
Charging port
cap (lbf·ft)
ףߢߤߧ
0.14 to 0.18
0.07 to 0.09
ףߢߥߩ
ףߢߧߢ
0.18 to 0.22
ףߢߨߥ
0.22 to 0.25
࢜Ɵ˵ʪʒʪϑ̈˝͝ϑɇ͝ʒϑ˵ɇΧʪɇθʪϑЇɵ̟ʪʀϩϩͱʀ˵ɇ͝˝ʪɇʀʀͱθʒ̈͝˝
to the model.
Step 9 Performing the gas leak test
Before completing the installation (insulation of the
cables, hose and piping and fixing of the indoor unit to the
installation plate), you must check that there are no gas
leaks.
To check for
gas leaks on
the...
Then, using a leak detector,check the ...
Outdoor unit
Valves on sections A and B.
Indoor unit
Flare nuts at the end of sections C and D.
Outdoor unit
B(Liquid)
Indoor unit
A(Gas)
C
D
• The designs and shape are subject to change according
to the model.
økçƟkƊƟǮÃƟ²ĘÃƟŵĮkĘ࣑ɵʪ˙ͱθʪͱΧʪ̈͝͝˝Эɇ̷Эʪϑ࣒
In order to detect basic refrigerant leaks, before
recreating the vacuum and recirculating the R-410A, it is
the responsibility of the installer to pressurize the whole
system with nitrogen (using a cylinder with pressure
reducer) at a pressure above 580.2 psi (gauge).
økçƟkƊƟǮÃƟ²ŵࣛߦߣߢ࣑ɇ˙ϩʪθͱΧʪ̈͝͝˝Эɇ̷Эʪϑ࣒
Before opening valves, discharge all the nitrogen into the
system and create vacuum. After opening valves check
leaks using a leak detector for refrigerant R-410A.
Summary of Contents for AJ020MCS3CH
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