Mitsubishi Electric VL-250CZPVU-R-E Installation Manual page 14

4.4 Connecting pipe
4.4.1 Duct Piping
WARNING
Install the ducts in the indoor side of the insulation layer/
airtight layer.
When installed on the outdoor side of the heat insulating
layer, the temperature of the heat-recovered air will drop and
condensation will form, which will cause the floor to get wet.
Secure duct piping with commercially available fixing
bands, aluminum tape, etc. to prevent piping from loose.
Install outdoor piping from the unit so that it is tilted at a
downward pitch of at least 1/30 towards the outside.
Failure to heed this warning may cause rain penetration,
resulting in electric shock/fire or water damage to household
property.
Note
- When discharging the air from a bathroom, use ducts
made of a material that does not allow water to leak.
- When using PCV ducts or metal ducts for the SA side
ducts, be sure to connect ducts having silencer before
the grill.
- The duct for exhaust from the bathroom and the pipe
guide should be sealed with caulking material.
- When using calking compound, take care to prevent it
from oozing from the ducts. (Otherwise, it could cause
aluminum tape to peel off.)
- Before connecting the ducts, make sure that there are
no metal chips or other foreign matter (For example
paper or vinyl) inside the ducts or inside the product.
■VL-250CZPVU-R-E
■VL-250CZPVU-L-E
Duct Inner diameter φ150
Aluminum tape
(Field supply) (Field supply)
Pipe guide (unit)
Sealant (Field supply)
■VL-350CZPVU-R-E
■VL-350CZPVU-L-E
Aluminum tape
(Field supply)
Pipe guide (unit)
Sealant (Field supply)
4.4.2 Insulating Ducts
CAUTION
To prevent dew condensation, insulate the ducts and
pipe guide. (glass wool 25 mm or equivalent)
Be sure to insulate up to the base of pipe guide.
When the product is anticipated to be stopped for a long
time, insulate the RA (Return Air) side ducts also. (i.e. not
operated for 24 hours).
Indoor humidity can cause condensation because
exposed parts can become cold in winter.
■VL-250CZPVU-R-E
■VL-250CZPVU-L-E
Insulating (Field supply)
■VL-350CZPVU-R-E
■VL-350CZPVU-L-E
Insulating (Field supply)
Eng-14
Duct Inner diameter φ150
(Field supply)
EPS (Unit)