122-EN
121-EN
– 61 –
7
Refrigerant piping
WARNING
•
If the refrigerant gas leaks during installation, ventilate the room.
If the leaked refrigerant gas comes into contact with
fi
re, noxious gas may be generated.
•
After installation, check that the refrigerant gas does not leak.
If the refrigerant gas leaks into the room and comes into contact with
fi
re such as a fan heater, stove, or
kitchen range, noxious gas may be generated.
Connection of refrigerant pipe
• The refrigerant pipe connecting section is set in the
outdoor unit. Remove the front panel and the piping/
wiring panel. (M5: 9 pcs.)
• As shown in the illustration on the right, the hooks are
at the right and left sides of the front panel. Lift up and
remove the front panel.
• Pipes can be drawn out forward or downward from the
outdoor unit.
• When drawing out the pipe forward, draw it out to the
outside via the piping/wiring panel, and leave a space
of 500mm or more from the main pipe connecting the
outdoor unit with the indoor unit, considering service
work or other work on the unit. (For replacing the
compressor, 500mm or more space is required.)
• When drawing out the pipe downward, remove the
knockouts on the base plate of the outdoor unit, draw
the pipes out of the outdoor unit, and perform piping
on the right/left or rear side. Downward length of the
balance pipe should be 5m or less.
Ball valve of gas
side
Ball valve of gas
side
Packed valve of
liquid side
Ball valve of
liquid side
Packed valve of
balance pipe
Packed valve of
balance pipe
(MAP080, MAP100, MAP120)
(MAP140, MAP160, MAP180,
MAP200, MAP220)
Hook
Front panel
Piping/wiring panel
(Rear piping)
(Right piping)
Drawing out
downward
(Right
piping)
(Left
piping)
Drawing out forward
500mm or
more
(Left piping)
REQUIREMENT
• For Brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the inside
of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.
• Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not
contaminate the refrigerant.
• Be sure to use two spanners to loosen or tighten the
fl
are nut. If a single spanner is used, the required level of
tightening cannot be obtained. Tighten the
fl
are nut with the speci
fi
ed torque. (If it is hard to loosen or tighten the
fl
are nut of the balance pipe or packed valve of the liquid side with two spanners, loosen or tighten the
fl
are nut
while holding the valve mounting plate with a spanner.)
Outer dia. of
copper pipe
Tightening torque (N•m)
6.4 mm
14 to 18 (1.4 to 1.8 kgf•m)
9.5 mm
33 to 42 (3.3 to 4.2 kgf•m)
12.7 mm
50 to 62 (5.0 to 6.2 kgf•m)
15.9 mm
68 to 82 (6.8 to 8.2 kgf•m)
19.1 mm
100 to 120 (10 to 12 kgf•m)
Packed valve of
balance pipe
Ball valve of gas side
Packed valve of liquid
side
Pipe connection method of valve at the gas side (Example)
Type
Pipe-diameter
Draw-out forward
Draw-out downward
Gas
Liquid
MAP080
Ø19.1
Ø12.7
Cut the L-shaped pipe at the horizontal
straight section, then braze the supplied
attachment pipe and the socket and pipe
procured locally.
Liquid
pipe
Gas pipe
Attachment
pipe
Balance
pipe
Socket
Pipe
Section
to be cut
Gas
pipe
Cut the L-shaped pipe at the vertical straight
section, then braze the supplied attachment
pipe and the socket and pipe procured
locally.
Liquid
pipe
Gas pipe
Attachment
pipe
Balance
pipe
Socket
Pipe
Section
to be cut
Gas
pipe
MAP100
Ø22.2
Ø12.7
MAP120
Ø28.6
Ø12.7
MAP140
MAP160
Ø28.6
Ø15.9
Cut the L-shaped pipe at the horizontal
straight section, then braze the supplied
attachment pipe, and the socket and pipe
procured locally.
Liquid
pipe
Gas pipe
Attachment pipe
Balance
pipe
Socket
Pipe
Section
to be cut
Gas
pipe
Cut the L-shape pipe at the vertical straight
section, then braze the supplied attachment
pipe, and the socket and pipe procured
locally.
Liquid
pipe
Gas pipe
Attachment
pipe
Balance
pipe
Socket
Pipe
Section
to be cut
Gas
pipe
1117101201-3 EN.indd 61
1117101201-3 EN.indd 61
8/8/2559 BE 3:49 PM
8/8/2559 BE 3:49 PM
