Refrigerant Piping - Toshiba MAP0801T8 Installation Manual

5

REFRIGERANT PIPING

If the refrigerant gas leaks during installation work, ventilate the room.
If the leaked refrigerant gas comes to contact with a fire, the noxious gas may generate.
After installation work, check that the refrigerant gas does not leak.
If the refrigerant gas leaks in the room and comes to contact with a fire such as fan heater, stove, or kitchen
range, the noxious gas may generate.
Connection of refrigerant pipe
1. 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 right figure, the hooking hooks are attached at
right and left sides each on the front panel. Lift up and remove
the front panel.
2. Pipes can be drawn out forward and downward from the outdoor
unit.
3. When drawing out the pipe forward, draw out the pipe to outside
via piping/wiring panel, and keep space of 500mm or more from
the main pipe connecting the outdoor unit with the indoor unit,
considering service work, etc. (For replacing the compressor,
500mm or more space is required.)
4. When drawing out the pipe downward, remove the knockout of
the base plate of the outdoor unit, apply the pipe to outside of the
outdoor unit, and perform piping at right/left or rear side. Leading
pipe of the balancing should be within 4m.
(MMY-MAP0501 , MAP0601 )
For brazing, be sure to use nitrogen gas to avoid oxidation of pipe inside.
1. In a welding work for the refrigerant pipes, be sure to use the nitrogen gas in order to prevent oxidation inside
of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale generates.
2. Use clean and new pipes for the refrigerant pipes
and perform piping work so that water or dust is
not mixed.
3. Be sure to use a double spanner to loosen or
tighten the flare nut. If a single spanner is used, a
required tightening cannot be obtained. Tighten
the flare not with the specified torque.
WARNING
Ball valve of
gas side
Packed valve of
liquid side
Packed valve of
balance pipe
(MMY-MAP0801 , MAP1001 , MAP1201 )
REQUIREMENT
Outer dia. of copper pipe
10
(Right
piping)
(Left piping)
Drawing out
forward
(Left piping)
Drawing out
downward
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)
Hook
Front panel
Piping/wiring panel
(Rear piping)
(Right piping)
Packed valve of
gas side
Packed valve
of liquid side
Packed valve of
balance pipe