AirStage ASUB18RLAV, Installation Manual

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4.3.2. Bending pipes
• The pipes are shaped by your hands or pipe bender. Be careful not to collapse them.
• Do not bend the pipes in an angle more than 90°.
• When pipes are repeatedly bend or stretched, the material will harden, making it dif
fi cult
to bend or stretch them any more. Do not bend or stretch the pipes more than 3 times.
CAUTION
To prevent breaking of the pipe, avoid sharp bends.
If the pipe is bent repeatedly at the same place, it will break.
4.3.3. Pipe connection
When the fl are nut is tightened properly by your hand, hold the body side coupling with a
separate wrench, then tighten with a torque wrench.
CAUTION
Hold the torque wrench at its grip, keeping it at a right angle with the pipe, in order to
tighten the
fl are nut correctly.
Tighten the fl are nuts with a torque wrench using the speci fi ed tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a fl ame.
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Tighten with 2 wrenches.
Holding wrench
Flare nut
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the
fl are nut cannot tightened smoothly. If the
fl are nut is forced to turn, the threads will be damaged.
Do not remove the flare nut from the indoor unit pipe until immediately before
connecting the connection pipe.
Do not use mineral oil on fl ared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
Flare nut [in. (mm)] Tightening torque [ lbf·ft. (N·m)]
1/4 (6.35) dia. 11.8 to 13.3 (16 to 18)
3/8 (9.52) dia. 23.6 to 31.0 (32 to 42)
1/2 (12.70) dia. 36.1 to 45.0 (49 to 61)
5/8 (15.88) dia. 46.5 to 55.3 (63 to 75)
3/4 (19.05) dia. 66.4 to 81.1 (90 to 110)
5. FORMING THE DRAIN HOSE AND PIPE
CAUTION
Do not remove the flare nut from the indoor unit pipe until immediately before
connecting the connection pipe.
To prevent breaking of the pipe, avoid sharp bends.
If the pipe is bent repeatedly at the same place, it will break.
[For
1
Rear piping,
2
Right piping and
3
Bottom piping]
• Install the indoor unit piping in the direction of the wall hole and bind the drain hose and
pipe together with vinyl tape.
• Install the piping so that the drain hose is at the bottom.
• Wrap the pipes of the indoor unit that are visible from the outside with decorative tape.
Pipe (Top)
Cloth tape
(Accessories)
2 Right piping
3
Bottom piping
Bind with vinyl tape
Drain hose (Bottom)
1
Rear piping
CAUTION
• Do not wrap the tape too tightly on drain hose. If the tape is too tight (as shown
in the Figure below) the insulation effect will be lost and the moisture from
condensation may accumulate.
Bad Example
Vinyl tape too tight
• Perform “6. ELECTRICAL WIRING” before performing this piping.
• Wrap the pipes of the indoor unit that are visible from the outside with cloth tape.
• After passing the indoor piping and drain hose through the wall hole, hang the indoor
unit on the hooks at the top of the wall hook bracket.
[For 4 Left bottom piping, 5 Left piping and 6 Center piping,
7
Left rear piping]
• Preset the end of the pipe.
• For
6 Center piping and, 7 Left rear piping route the connection pipes through the
wall.
• Bend the connection piping to a bend radius not less than 3-15/16 in. (100 mm) and
position the piping no more than 1-3/8 in. (35 mm) from the wall.
• After passing the indoor unit piping and drain hose through the wall hole, hang the
indoor unit on the hooks at the top and bottom of the wall hook bracket.
Wall
hook
bracket
Small piping (Liquid pipe)
Large piping (Gas pipe) Connection piping
Alignment marks
[Hang the indoor unit]
• Hang the indoor unit from the hooks at the top of the wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate
the bottom of the indoor unit from the wall.
Bottom hook
Indoor unit
Top hooks
Wall hook bracket
Indoor unit
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