Hitachi FSG Series, Technical Catalogue

Page: 329 / 424

DRAIN PIPING
14
/5
6. Do not connect the drain pipe with sanitary sewage or
any other drainage pipe.
7. When installing the pipe, do not tie the drain pipe and
refrigerant pipe together. Tie the drain pipe as shown
below
8. After completing the drain pipe work, pour water into
the drain pan and check to ensure that water flows
smoothly as indicated in 14.1
14.5 RPI (IN-THE-CEILING TYPE)
1. The position of the drain piping connection is shown in
the next figure.
2. Prepare a polyvinyl chloride tube with a Ø32 mm outer
diameter.
3. Fasten the tube to the drain hose with an adhesive and
the factory-supplied clamp. The drain piping must be
performed with a DOWN-SLOPE pitch of 1/25 to 1/100
4. Insulate the drain pipe after connecting the drain hose.
(drain Piping)
?
NOTE:
When the relative humidity of inlet or ambient air
exceeds 80%, apply an (field-supplied) auxiliary drain
pan beneath the indoor unit as shown below.
Band
Band
Rear Side piping Rear Side piping
PRI-0.8~1.5
PRI-2~5
Drain Piping
Drain Piping
Electrical box
1/25~1/100 Down Slope
1/25~1/100
Down Slope
Max
.
500 mm
Insulation (Field-Supplied)
Clamp
(Field-Supplied)
Polyvinyl Chloride Tube
(Field-Supplied)
Insulation
(Field-Supplied)
1/25~1/100
Down Slpoe
Indoor Unit
Auxiliary Drain Pan
(Field-Supplied)
To the Atmosphere