Hitachi SET FREE-Serie Bedienungsanleitung Seite 39

PIPING WORK AND REFRIGERANT CHARGE
1 Keep the straight-line distance of 500 mm or more after the
piping connection kit 1
• 2 and 3 Units Combination
Outdoor
Outdoor
unit A
Indoor unit side
L
A
Piping connection kit 1 Piping connection kit 2
Outdoor
unit A
500 mm
or more
Indoor unit side
Piping connection kit 1
• 4 Units Combination
Outdoor Outdoor
unit A unit B
Indoor unit side
L
A
Piping
connection
kit 1
Piping connection kit 2
Outdoor
unit A
500 mm
or more
Piping connection kit 2
Indoor unit side
Piping connection kit 1
29 PMML0479 rev.2 - 02/2018
Outdoor
unit B
unit C
L L
B C
Upstream side
Max. lift
difference
Outdoor
Outdoor
between outdoor
unit C
unit B
units is 100 mm.
Piping connection kit 2
Outdoor
Outdoor
unit C
unit D
L L L
B C D
Piping connection kit 3
Upstream side
Outdoor
Outdoor
Outdoor unit C
unit D
unit B
Max. lift
difference
between
outdoor units
is 100 mm.
Piping connection kit 3
2 Place the piping connection kit lower than the outdoor unit
piping connection.
In case that the piping connection kit is placed higher
than the outdoor unit piping connection, keep 300mm
(max.) between the piping connection kit and the bottom
of the outdoor unit. Also, provide the oil trap (min. 200mm)
between the piping connection kit and the outdoor unit.
• 2 and 3 Units Combination
Indoor unit side
Indoor unit side
The refrigerant oil is stagnated to the unit stopped.
Oil trap min. 200 mm
Oil trap min. 200 mm
Indoor unit side
Max. 300 mm
• 4 Units Combination
Indoor unit side
Indoor unit side
The refrigerant oil is stagnated to the unit stopped.
Oil trap min.
Oil trap min.
200 mm
200 mm
Max. 300 mm
Max. 300 mm
Oil trap min. 200 mm
Max. 300 mm Max. 300 mm
Oil trap min.
Oil trap min.
200 mm
200 mm
Max. 300 mm
Max. 300 mm