Refrigerant Piping - Hitachi RCIM-1.0FSN4 Installations- Und Betriebshandbuch

Refrigerant piping

14 REFRIGERANT PIPING
Before refrigerant piping work, drain piping work and insulation
are required. Refer to the "15 Drain piping"
!
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.
14.1 PIPING POSITION
14.2 PIPING CONNECTION SIZE
1 Prepare locally-supplied copper pipes.
2 Select the appropriate pipe size according to the table
below:
Model
RCIM-0.6FSN4
RCIM-0.8FSN4
RCIM-1.0FSN4
RCIM-1.5FSN4
RCIM-2.0FSN4
RCIM-2.5FSN4
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.
?
N O T E
• Notice for refrigerant pipe ends.
• Attach a cap or put a plastic bag over the pipe end.
22 PMML0363A rev.2 - 08/2016 - P5416559
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
Ø15.88 (5/8) Ø9.52 (3/8)
Hole
Attach a cap or put a plastic bag
over the pipe end.
In Case of Rain
Correct
Rain water
can come in.
Attach a cap or put a plastic
bag over the pipe end.
• Use the specified non-flammable refrigerant (R410A) to the
outdoor unit in the refrigerant cycle. Do not charge the unit with
material other than R410A such as hydrocarbon refrigerants
(propane or etc.), oxygen, flammable gases (acetylene or etc.) or
poisonous gases when installing, maintaining and moving the
unit. These flammables are extremely dangerous and may cause
an explosion, a fire, and injury.
521 (Drain pipe)
Drain pipe
connection
Wiring connection
In case of getting the pipe through a hole in the wall.
Do not place the pipe directly on the ground.
Incorrect
Hole
Incorrect
Cap or plastic bag
Rubber Band
• 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.
In Case of Getting the Pipe
Through a Hole in the Wall
Incorrect
Correct
Correct
Incorrect
Hole Hole
Hole Hole
In Case of Getting the Pipe
Attach a cap or put a plastic bag
Cap or plastic bag
Through a Hole in the Wall
Do not place the pipe
over the pipe end.
directly on the ground.
Incorrect
Correct
In Case of Rain
Correct Correct Incorrect
Incorrect
Correct Incorrect
Hole Hole
Rain water
can come in.
Attach a cap or put a plastic bag
Cap or plastic bag
over the pipe end.
Attach a cap or put a plastic
bag over the pipe end.
Rubber Band
In case of rain
In Case of Rain
Attach a cap or put a plastic
Correct Incorrect Incorrect
Correct
bag over the pipe end.
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
Attach a cap
directly
bag over the
Correct
Attach a ca
bag over th