Refrigerant Piping - Hitachi RCIM-0.4FSRE Installations- Und Betriebshandbuch

REFRIGERANT PIPING

10 REFRIGERANT PIPING
Before refrigerant piping work, drain piping work and insulation
are required. Refer to the
"11 Drain piping"
10.1 PIPING POSITION
10.2 PIPING CONNECTION SIZE
1 Prepare locally-supplied copper pipes.
2 Select the appropriate pipe size according to the table
below:
Model
RCIM-0.4FSRE
RCIM-0.6FSRE
RCIM-0.8FSRE
RCIM-1.0FSRE
RCIM-1.5FSRE
RCIM-2.0FSRE
RCIM-2.5FSRE Ø15.88 (5/8)
3 Select clean copper pipes. Make sure there is no dust and
water inside. Use a pipe cutter when cutting the pipes, to
avoid a grind swarf generation. Do not use a saw or a grind
stone to cut pipes. Blow the inside of the pipes with nitrogen
or dry air, to remove any dust or foreign materials before
connecting pipes.
?
N O T E
• Refer to Installation and Operation Manual of the outdoor unit for
detail on allowable pipe length.
• Notice for refrigerant pipe ends.
• Attach a cap or put a plastic bag over the pipe end.
13 PMML0550 rev.0 - 12/2020
for details.
(Liquid pipe)
145
94 (Gas pipe)
Refrigerant liquid pipe
connection
Refrigerant gas pipe
connection
mm (in.)
Gas Pipe Liquid Pipe
In Case of Getting the Pipe
Through a Hole in the Wall
Ø12.7 (1/2) Ø6.35 (1/4)
Correct
Hole
Ø9.52 (3/8)
Attach a cap or put a plastic bag
over the pipe end.
In Case of Rain
Correct
Rain water
can come in.
Rubber Band
Attach a cap or put a plastic
bag over the pipe end.
!
D A N G E R
• Do not perform refrigerant piping work, drain pumping, and
refrigerant charge without referring to Installation and Operation
Manual of the outdoor unit..
(Drain pipe)
521
Drain pipe
connection
Wiring connection
In Case of Getting the Pipe
Through a Hole in the Wall
In case of getting the pipe through a hole in the wall.
Correct
Correct
Attach a cap or put a plastic bag
over the pipe end.
Correct
Do not place the pipe directly on the ground.
Incorrect Correct
Hole
Attach a cap or put a plastic bag
over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Incorrect
Cap or plastic bag
• Due to the change of refrigerant oil, the refrigerant cycle is more
subject to the entrance of foreign matters such as moisture, oxide
film and grease. Be careful that these substances do not enter
the refrigerant cycle during installation work. Otherwise, they may
be trapped into such parts as the expansion valve, hindering the
operation.
Incorrect
Incorrect
Hole Hole
Hole
Hole
In Case of Getting the Pipe
Through a Hole in the Wall
Do not place the pipe
Cap or plastic bag
directly on the ground.
Incorrect
In Case of Rain
Correct
Incorrect
Incorrect
Correct Incorrect
Hole Hole
Rain water
can come in.
Cap or plastic bag
In case of rain
In Case of Rain
Rubber Band
Correct Incorrect Incorrect
Correct
Rain water
Rain water can
can come in.
come in
Rubber Band
Rubber band
Attach a cap or put a plastic
bag over the pipe end.
Do not p
directly o
Correct
Do not p
directly
Attach a cap
bag over the
Correct
Attach a ca
bag over th