Installation Manual
20
20-EN
Tightening connection
CAUTION
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Tightening torque of flare pipe connections
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REQUIREMENT
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Piping with outdoor unit
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Outer dia. of copper pipe
Tightening torque
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Heat insulation
Heat insulation for the pipes should be done
separately for the liquid side and gas side.
Because both of the liquid and gas side pipes
become a low temperature during cooling
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done to prevent condensation.
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more must be used for the gas side pipe.
The pipe connection section of the indoor unit
must be heat insulated securely and compactly
with the attached heat insulator.
Airtight test/Air purge, etc.
For airtight test,air purge, addition of refrigerant,
and gas leak check, follow the Installation Manual
attached to the outdoor unit.
Open fully valves of the outdoor
unit
Gas leak check
Check with a leak detector or soap water whether
gas leaks or not, from the pipe connecting section
or cap of the valve.
REQUIREMENT
Use a leak detector manufactured exclusively
HFC refrigerant (R410A, R134a, etc.).
Fix with vinyl tape
Heat insulator
(attached)
Local side pipe
