Mitsubishi Heavy Industries FDC112KXEN6 Technical Manual page 201

d) Level the unit using a hose filled with water. If the unit is out of level, water leaks or malfunctioning of the floating
switch may occur.
e) After ensuring the above, secure the unit.
2) When embedded into ceiling
a) Install the unit following steps b) and c) of the above part 1).
b) When installing on a conventional ceiling, cut an installation opening (740 mm × 600 mm) in the ceiling.
c) Check the installation height and level, and after that, secure the unit.
(iv) Drain piping
1) Drain piping should always be in a downhill grade (1/50-1/100) and avoid riding across an elevation or making traps.
● Good piping
Suspension
bolts
Heat
insulation
2) When connecting the drain pipe to the unit, pay suffcient attention not to apply excess force to the piping on the unit side.
Also, fix the piping at a point as close as possible to the unit.
3) For drain pipe, use hard PVC ganeral purpose pipe VP-20 which
can be purchased locally. When connecting, insert a PVC pipe
end securely into the drain socket before tightening securly using
the attached drain hose and clamp. Adhesive must not be used
connection of the drain socket and drain hose (accessory).
4) When constructing drain piping for several units, position the common pipe about 100mm below the drain outlet of each
unit as shown in the sketch below. Use VP-30 or thicker pipe for this pupose.
Supply water
1.5 m ~ 2 m
A downhill grade
of 1/100 or more
Pipe cover (small)[insulation]
Secure the elevation as high as possible
(approx. 100 mm)
A downhill grade of
1/100 or more
-
Indoor unit
PVC hose
● Improper piping
Air vent
Drain socket
Pipe cover (large)[insulation]
(accessory
Indoor
unit
Clamp
Drain socket
(accessory)
(accessory)
VP30
197
-
Avoid riding
across an elevation
Keep free from traps
Do not pipe under water.
Size difference part
Drain hose
oint for VP-20
(field procurement)
Drain hose
(field procurement)
(accessory)
Pipe cover [insulation]
Adhesion
(field procurement)
VP-20