Hitachi SET FREE-Serie Bedienungsanleitung Seite 40

PIPING WORK AND REFRIGERANT CHARGE
3 In case that the piping length between outdoor units is 2m or
more, the oil trap for the gas pipe should be provided so that
accumulation of refrigerant oil may not occur.
• 2 and 3 Units Combination
Less than 2m
Indoor unit side
Less than 2 m
Oil trap
min. 200 mm
Indoor unit
side
Less than 2 m
2 m or more
• 4 Units Combination
Less than 2m
Indoor unit side
Less than
Less than 2 m
2 m
Less than 2 m
Indoor unit side Oil trap
min. 200
mm
Less than
Less than 2 m
2 m or more
2 m
Less than 2 m
2 m or more
10 m or more
4 Place the outdoor unit pipe horizontally or with the pipe
slanted downward towards the indoor unit side so that
accumulation of refrigerant oil may not occur in the pipe.
• 2 and 3 Units Combination
Indoor unit side
30 PMML0479 rev.2 - 02/2018
Less than 2 m
2m or More
Oil trap
min. 200 mm
Less than 2 m
2 m or more
Less than 2 m
2m or More
Oil trap
Oil trap
min. 200
min. 200
mm
mm
Less than
2 m
2 m or more
Refrigerant oil accumulates in the pipe.
Indoor unit side
• 4 Units Combination
Indoor unit side
Refrigerant oil accumulates in the pipe.
Indoor unit side
5 For servicing, in case that the pipe is placed frontward of
the outdoor unit, secure min. 500mm between the outdoor
unit and piping connection kits. (When the compressor is
replaced, a space of min. 500mm is required.)
Outdoor Unit
Outdoor unit
Min. 500mm
Min.500mm
Piping
Connection Kit
Piping connection
Outdoor unit
Min. 500 mm
Piping connection kit
6 Direction of Piping Connection Kit
Place the piping connection kit vertically to the ground (the
slope must be within +15º) as shown in the figure.
± 15º
?
n o t e
The refrigerant system may be damaged if the slope of the piping
connection kit exceeds +15º.
Outdoor Unit Outdoor Unit
Outdoor unit Outdoor unit
Piping
Connection Kit
Piping connection
kit kit
Outdoor unit
Outdoor unit Outdoor unit
Piping connection kit