Hitachi RCD-0.8FSN3 Installation And Operation Manual page 31

DRAIN PIPING
16 DRAIN PIPING
Perform drain piping work and attach the insulations before
refrigerant piping work.
D A N G E R
Do not put the drain pipe for the indoor unit into the drainage trench
the room, which may cause poisoning.
1 The position of the drain pipe connection is shown in the
Drain pipe connection
(Polyvinyl chloride pipe/VP25)
Air panel (Option)
2 Prepare a polyvinyl chloride pipe with a 32mm outer
recommended].
3 Connecting Drain Pipe
a. 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. The
adhesive Eslon Nº 73 (Sekisui Chemical Co. Ltd) is
recommended.
b. Insert the drain hose completely. If it is not inserted
properly, or if it is twisted, water leakage may occur.
Drain pipe
connection
Insert completely and properly
Twisted, incompletely insertion
23 PMML0416A rev.0 - 12/2015 - P5415720
65
(mm)
Drain pipe
359
Drain hose
(Accessory)
Correct
Incorrect
c. Attach the factory-supplied hose clamp to the vinyl tape
(white) attached to the drain hose. The hose clamp
shall be 20mm away from the end face of the drain
hose. Then tighten the hose clamp to make sure that it
Hose band (accessory)
Tightening torque: 3.0-3.5N.m
Vinyl tape (white)
Drain pipe connection
For checking drainage
(transparent)
Tightening torque: 3.0-3.5N.m
N O T E
•
•
•
•
4 On-site Drain Piping Work
a. Connect the factory-supplied drain hose to the drain pipe
connection using the polyvinyl chloride adhesive.
b. When cleaning the connection surface, applying the
adhesive, inserting, retaining and curing the drain pipe,
refer to information given by the adhesive manufacturer.
c. The drain piping shall be installed on a downward slope
d. Install the support parts at an interval of 1m to 1.5m in
order not to bend the drain pipe.
e. Install the drain hose horizontally or slightly on an upward
slope to prevent air pockets from forming inside it. If air
which could cause an abnormal noise and leakage to the
room when the unit operation is stopped.
Drain hose
Install the drain hose horizontally or
with an upward slope
Elbow or Vinyl chloride VP25
(Field-supplied)
Drain hose (accessory)
20+5mm
Use vinyl chloride
type adhesive
Min.
28mm