Hitachi RPI-1.5FSRE, Installation & Operation Manual, Page: 48 / 450

6.2 DRAIN PIPE CONNECTION
1
The position of the drain pipe connection is shown below.
Drain piping
Dimension (mm)
a b c
216 171 66
2 Prepare a polyvinyl chloride pipe with a 32 mm outer diameter.
3
Fasten the tubing 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.
1/25~1/100
Down slope
Max.
850mm
Gradient of drain piping
!
C A U T I O N
Do not apply excessive force to the drain pipe connection. It could cause
a damage.
4 Connect the factory-supplied drain hose to the drain pipe
connection with the polyvinyl chloride adhesive. When
cleaning the connection surface, applying the adhesive,
inserting, retaining and curing the pipe, refer to information
given by the adhesive manufacturer.
Drain hose
!
C A U T I O N
The drain hose must be completely inserted. If it is not inserted properly,
or if it is twisted, water leakage may occur.
5
Attach the factory-supplied hose clamp to the vinyl tape
(gray) attached to the drain hose. The hose clamp shall be
20 mm away from the end face of the drain hose.
a
b
a: 20mm
b: 300 mm
6
Then tighten the hose clamp to make sure that it is
approximately 28 mm in length from the screw to the edge of
the hose clamp.
a
a: 28 mm
7 Insulate the drain pipe after connecting the drain hose.
Side
unit
Insulation (Field-Supplied)
?
N O T E
If there is excessive clearance between the drain pipe connection and the
drain hose, add a sealing material between both parts in order to fit and
not deform the drain hose.
DRAIN PIPING
PMML0528 rev.1 - 02/2021 18