Hitachi RCIM-1.0FSN4 Installations- Und Betriebshandbuch Seite 35

Drain piping
6 Insert the drain hose completely. If it is not inserted properly, or if it is twisted, water leakage may occur.
Drain Pipe
Drain pipe
Connection
connection
7 In case of raising the drain pipe, install it according to the
dimension shown in the figure below. The total drain piping
Twisted
length of a+b+c shall be within 1100mm.
1 to 1.5m
a (Max. 300mm)
Support part
1/25 to 1/100
Down-slope
(Max. 50mm, shorter
Twisted, incompletely insertion.
as possible)
Drain hose
(accessory)
8 Attach the factory-supplied hose clamp to the vinyl tape
(gray) 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 is approximately
28mm in length from the screw to the edge of the hose
clamp as shown:
Hose band (accessory)
Tightening torque: 3.0-3.5 N.m
Vinyl tape (gray)
Drain pipe connection
for checking drainage
(transparent)
Tightening torque: 3.0-3.5 N.m
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N O T E
• If connecting the factory-supplied drain hose to the drain pipe
connection without adhesive, for future relocation, follow the
procedure (6) and (8).
• Use the factory-supplied drain hose and the hose clamp. Others may
cause water leakage.
• Do not bend or twist the factory supplied drain hose. It will cause
water leakage.
• Do not apply an excessive force to the drain pipe connection. It could
cause a damage.
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On-site drain piping work
• Connect the factory-supplied drain hose to the drain pipe
connection using the polyvinyl chloride adhesive.
• When cleaning the connection surface, applying the
adhesive, inserting, retaining and curing the drain pipe, refer
to information given by the adhesive manufacturer.
25 PMML0363A rev.2 - 08/2016 - P5416559
CORRECT
Drain Hose
Drain hose
(Accessory)
(Accessory)
(Correct)
Drain Hose
(Accessory)
Ceiling
Hose band (accessory)
Incompletely Insertion
(Incorrect)
Elbow or vinyl chloride VP25
(Field-supplied)
Drain hose (accessory)
20+5mm
Max. 300mm
Use vinyl chloride
type adhesive
Min. 28mm
Drain Pipe
Connection
Drain Hose
(Accessory)
(Correct)
INCORRECT
Twisted
Twisted
Incompletely insertion
Twisted, incompletely insertion
(Incorrect)
• Install the support parts at an interval of 1m to 1.5m in order
Twisted, incompletely insertion.
not to bend the drain pipe.
• Install the drain hose horizontally or slightly on an upward
slope to prevent air pockets from forming inside it. If air
pockets form, the drain water will flow back into the unit,
which could cause an abnormal noise and leakage to the
room when the unit operation is stopped.
Drain Hose
Drain hose
Install the drain hose horizontally Install the drain hose horizontally or
or with an upward slope. with an upward slope.
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Installing common drain pipe
• Install the common drain pipe on a downward slope to make
sure that it is lower than each rising part of the drain pipe
from the indoor unit.
• The pipe size of the common drain pipe must be larger
than VP30 (nominal diameter 30mm, outer diameter 38mm)
according to the number of the connected indoor units.
Example
1/25 to 1/100
downward slope
Drain piping of unit side
Common drain piping (Min. VP30)
(Downward slope from rising part)
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N O T E
• Do not provide an upward slope or a rising part for the drain pipe.
Otherwise, the drain water will flow back into the unit and it may
cause the water leakage when the unit operation is stopped.
Incorrect installation of drain piping
Rising part
• Do not connect the drain pipe with sanitary or sewage pipe or any
other drainage pipe.
Drain hose
Drain Hose
(Accessory)
(Accessory)
Incompletely Insertion
Min. 100mm
(higher as possible)
Vinyl Chloride Pipe (VP25)
This drain pipe shall
be separating from
other pipes
Upward slope