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Installation Inspection
Step 4.1 Performing the gas leak tests
1. Before inspecting the leakage, use a torque
wrench to close the cap for the stop valve.
(Comply with a tightening torque for each size
of the diameter, and tighten the cap firmly to
prevent any leakage.)
Tightening torque for body cap
(Refer to the table)
Charging core
R-22: Thread of the screw - 7/16-2OUNF
R-410A: Thread of the screw -1/2-2OUNF
T
ightening torque for charging port cap
(Refer to the table)
Outer diameter
Body cap
(mm)
(N•m)
ø 6.35
20 to 25
ø 9.52
20 to 25
ø 12.70
25 to 30
ø 15.88
30 to 35
Over ø 19.05
35 to 40
2. Insert inert gas into the pipes connected to
indoor and outdoor units.
3. Test leakage on the connection parts of the
indoor and outdoor units with soap lather or
liquid.
Spindle
Tightening torque
Charging port cap
(N•m)
10 to 12
( 1 N•m = 10 kgf•cm )
Test parts for the
indoor unit
Step 4.2 Performing final check and trial
operation
1. Check the following:
• Strength of the installation site
• Tightness of pipe connection to detect gas leak
• Electric wiring connection
• Heat-resistant insulation of the pipe
• Drainage
• Grounding conductor connection
• Correct operation (Take the following steps.)
2. Press the
(Power) button on the remote
control to check the following:
• The indicator on the indoor unit lights up.
• The airflow blade opens and the fan gears up for
operation.
3. Press the
(Mode) button to select Cool
mode. Then take the following sub-steps:
• In Cool mode, use the Temperature button to set the
set temperature to 16 °C.
• Check whether, approximately 3 to 5 minutes later,
the outdoor unit starts, and a cool air blows out.
• After 12 minutes of stationary condition, check the
indoor unit air treatment.
4. Press the
(Air swing) button to check
whether the airflow blades work properly.
5. Press the
(Power) button to stop the trial
operation.
Pumping down refrigerant
Pump-down is an operation intended to collect all the system
refrigerant in the outdoor unit. This operation must be carried
out before disconnecting the refrigerant tubing
Test parts for the
indoor unit
English
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