Drain Piping - Daikin J-Series Engineeiring Data

EDUS041011
Indoor Unit Installation
6.

Drain piping

1) Connect the drain hose, as described right.
2) Remove the air filters and pour some water into the drain pan to check the water
flows smoothly.
3) If drain hose extension or embedded drain piping is required, use appropriate parts that match the hose front end.
[Figure of hose front end]
4) When extending the drain hose, use a commercially available
extension hose with an inner diameter of 5/8 inch (16mm).
Be sure to thermally insulate the indoor section of the extension
hose.
5) When connecting a rigid polyvinyl chloride pipe
(nominal diameter 1/2 inch (13mm)) directly to
the drain hose attached to the indoor unit as
with embedded piping work, use any
commercially available drain socket (nominal
diameter 1/2 inch (13mm)) as a joint.
Refrigerant Piping Work
1.
Flaring the pipe end
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward
so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
WARNING
• Do not use mineral oil on flared part.
• Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
• Never install a drier to this R410A unit in order to guarantee its lifetime.
• The drying material may dissolve and damage the system.
• Incomplete flaring may cause refrigerant gas leakage.
10
Room Air Conditioners J-Series
φ5/8" (φ16mm) φ11/16" (φ18mm)
The drain hose provided
to indoor unit.
Indoor unit
drain hose
φ5/8"
(φ16mm)
The drain hose provided
to indoor unit.
φ18
Commercially available drain socket
(nominal diameter 1/2 inch (13mm))
(Cut exactly at
right angles.)
Flaring
Set exactly at the position shown below.
A Flare tool for R410A
Clutch-type Clutch-type (Rigid-type)
A 0-0.020 inch (0-0.5mm) 0.039-0.059 inch (1.0-1.5mm)
Die
Flare's inner surface
must be flaw-free.
Installation Manual
The drain hose should
be inclined downward.
No trap is permitted.
Do not put the end
of the hose in water.
Extension drain hose
Heat insulation tube
(field supply)
Commercially available rigid
polyvinyl chloride pipe
(nominal diameter 1/2 inch
(13mm))
Remove burrs.
Conventional flare tool
Wing-nut type (Imperial-type)
0.059-0.079 inch (1.5-2.0mm)
Check
The pipe end must
be evenly flared in a
perfect circle.
Make sure that the
flare nut is fitted.
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