Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 211

• There is a possibility that the supply air volume may exceed the allowable range of operation due to the capacity of
ventilation fan or strength of wind blowing against external air louver so that drainage from be heat exchanger may
fail to reach the drain pan leak outside (e.g. drip on to the with consequential water leakage in the room.)
Notice: Aspecific cover plate is available when changing the 4 spot to the 3 spot, or when changing the 3 spot to the 2
spot.
Note (1) Do not change from 2 spot to 1 spot.
7
8
a) Use side air intake port.
b) In case of simultaneous intake and exhaust, the side air intake port cannot be used, therefore, take air from the
midway air intake port along the intake duct.
Make sure to use suction as well.
c) Use a side exhaust port.
Use intake and exhaust duct flange of separately sold (for connection of ø125mm round duct) to connect ø125mm
round duct. The duct clamped by bands must be thermally insulated to prevent dew condensation.
1) Drain piping should always be in a downhill grade (1/50-1/100) and avoid riding across an elevation or making traps.
•
Suspension
bolts
Heat
insulation
Bad example of duct work
2
For ventilation
Side fresh air intake port
Fig.1
1.5 m ~ 2m
A downhill grade
of 1/100 or more
-
1
Louver to
outdoor air
Looking from top of unit
Fig.2
•
Air vent
204
-
Exhaust port
Intake duct
(square duct)
Fresh air intake
port midway
of return duct
Avoid riding across an elevation
Keep free from traps
Do not pipe under water