ENGLISH
9 REFRIGERANT PIPING
Before refrigerant piping work, drain piping work and insulation
are required. Refer to the
"10 Drain piping"
for details.
!
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.
•
Use the specified refrigerant (R32) to the outdoor unit in the
refrigerant cycle. Do not charge the unit with material other than
R32 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.
9.1 PIPING POSITION
177
140
180
145
94
521
Wiring connection
Drain pipe
connection
Refrigerant liquid pipe
connection
Refrigerant gas pipe
connection
(Drain pipe)
(Drain pipe)
(Gas pipe)
(Liquid pipe)
(Gas pipe)
(Liquid pipe)
?
N O T E
Refrigerant liquid pipe connection
3
2
1
9.2 PIPING CONNECTION SIZE
1
Prepare locally-supplied copper pipes.
2
Select the appropriate pipe size according to the table
below:
mm (in.)
Model
Gas Pipe
Liquid Pipe
RAI-50PPD
RAI-60PPD
Ø12.7 (1/2)
Ø6.35 (1/4)
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.
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
Incorrect
Incorrect
Correct
Incorrect
Hole
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.
Rubber Band
Do not place the pipe
directly on the ground.
Rain water
can come in.
In Case of Rain
Correct
Incorrect
Hole
Hole
Cap or plastic bag
Do not place the pipe directly on the ground.
In Case of Getting the Pipe
Through a Hole in the Wall
Correct
Correct
Incorrect
Incorrect
Correct
Incorrect
Hole
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.
Rubber Band
Do not place the pipe
directly on the ground.
Rain water
can come in.
In Case of Rain
Correct
Incorrect
Cap or plastic bag
In case of rain
In Case of Getting the Pipe
Through a Hole in the Wall
Correct
Correct
Incorrect
Incorrect
Correct
Incorrect
Hole
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.
Rubber Band
Do not place the pipe
directly on the ground.
Rain water
can come in.
In Case of Rain
Correct
Incorrect
Rain water can
come in
Rubber band
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.
REFRIGERANT PIPING
PMML0477 rev.0 - 07/2017
13
Содержание RAI-50PPD
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