Daikin R410A Split Series - Installation Preparation; Tools and Location Selection

8■English
8. Drain piping work
CAUTION
• Water pooling in the drainage piping can cause the drain to clog.
• Do not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia in the sewage might enter the
indoor unit through the drain pipes and corrode the heat exchanger.
• Keep in mind that the drain pipe becomes blocked if water collects on it.
• Do not tighten the
A
clamp metal with the torque more than the specied value.
The
B
drain hose , the socket or the
A
clamp metal may be damaged.
1. Install of drain piping
• Install the drain piping as shown in the gure and take measures against condensation. Improperly rigged piping could
lead to leaks and eventually wet furniture and belongings.
• Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so that air may not remain
trapped inside the pipe.
• Select the piping diameter equal to or larger than (except for riser) that of the connection piping (polyvinyl chloride
piping, nominal diameter 1 inch (25mm), outside diameter 1-1/4 inch (32mm)).
• If the drain hose cannot be sufciently set on a slope, refer to “Precautions for drain raising piping” (page 9).
• To keep the drain hose from sagging, space hanger bracket every 40-60 inch (1000-1500mm).
Downward inclination
of 1/100 or more
40-60 inch
(1000-1500mm)
Support
Good
Wrong
• Make sure to use the attached
B
drain hose and
the
A
clamp metal.
Insert the
B
drain hose into the drain socket up to
the point where the socket diameter becomes larger.
Put the
A
clamp metal to the taped hose end and
tighten the
A
clamp metal with torque 10.6~13.3lbf
• ft (120~150N·cm).
Clamp metal
Tape
Indoor unit
Drain hose
A
B
• Wrap the vinyl tape around the end of the
A
clamp metal so that the
F
sealing pad (Large) to be used at the next
process may not be damaged with the clamp end or bend the tip of the
A
clamp metal inward as shown.
<In case of sticking vinyl tape> <In case of bending the tip>
Tightened part
approx. 90°
Stick vinyl tape without
tearing the sealing pad
(Large).
Vinyl tape
F
Bend the tip without tearing the
sealing pad (Large).
Tightened part
approx. 90°
F
English
01_EN_3P674701-1B.indd 8 2022/06/02 10:06:24