Drain Piping; Refrigerant Piping Work; Flaring The Pipe End - Daikin FTXS09JEVJU Installation Manual

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
φ5/8" (φ16mm) φ11/16" (φ18mm)
The drain hose provided
to indoor unit.
φ18
The drain hose provided Commercially available drain socket
to indoor unit. (nominal diameter 1/2 inch (13mm))
(Cut exactly at
right angles.)
Set exactly at the position shown below.
A Flare tool for R410A
A 0-0.020 inch (0-0.5mm)
Die
The drain hose should
be inclined downward.
No trap is permitted.
Indoor unit
drain hose
φ5/8"
(φ16mm)
Heat insulation tube
(field supply)
Commercially available rigid
polyvinyl chloride pipe
(nominal diameter 1/2 inch
(13mm))
Remove burrs.
Flaring
Conventional flare tool
Clutch-type Clutch-type (Rigid-type)
0.039-0.059 inch (1.0-1.5mm)
Check
Flare's inner surface
must be flaw-free.
Do not put the end
of the hose in water.
Extension drain hose
Wing-nut type (Imperial-type)
0.059-0.079 inch (1.5-2.0mm)
The pipe end must
be evenly flared in a
perfect circle.
Make sure that the
flare nut is fitted.
■English