Hitachi RAS-8FSXNS2E Installation & Operation Manual page 36

CORRECT
Indoor unit
side
INCORRECT
Indoor unit
side
The refrigerant oil is stagnated to the unit stopped
CORRECT
ⓐ
ⓐ
Indoor unit
side
ⓑ ⓑ
ⓐ 200mm minimum for oil Trap
ⓑ 300mm maximum
The refrigerant oil stagnates in the stopped outdoor unit during system operation.
3 Install an oil trap for the gas piping when the piping length between the piping connection kits,
or the outdoor unit and the piping connection kit is 2m or more to prevent any accumulation of
refrigerant oil.
Less than 2m
CORRECT
Indoor unit
side
ⓑ
Less than 2m
CORRECT
Indoor unit
side
ⓑ
ⓑ
ⓑ
ⓐ 200mm minimum for oil Trap
ⓑ Less than 2m
ⓒ 2m or more
PMML0628 rev.0 - 05/2023
Indoor unit
ⓐ
Indoor unit
side
ⓑ
2m or more
CORRECT
Indoor unit
side
ⓑ
2m or more
Indoor unit
side
ⓑ
ⓑ
ⓓ 25m or less
CORRECT
Indoor unit
side
INCORRECT
side
The refrigerant oil is stagnated to the unit stopped
CORRECT
ⓐ ⓐ
ⓑ ⓑ
ⓐ ⓐ
ⓑ ⓑ
ⓒ
ⓓ
CORRECT
ⓐ
ⓐ
ⓑ
ⓒ
ⓑ
ⓓ
ⓐ ⓐ
ⓑ ⓑ
ⓒ
ⓐ
ⓑ
ⓒ ⓒ
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