Outdoor Unit Installation; Installing Outdoor Unit; Refrigerant Piping - Daikin Air Conditioner Installation Manual

1.

Installing Outdoor Unit

1) When installing the outdoor unit, refer to "Precautions for Selecting the Location" and the "Outdoor
Unit Installation Drawings."
2) If drain work is necessary, follow the procedures below.
2.
Drain Work
1) Use drain plug for drainage.
2) If the drain port is covered by a mounting base or floor surface, place
additional foot bases of at least 1-1/4" inch height under the outdoor unit's feet.
3) In cold areas, do not use a drain hose with the outdoor unit.
(Otherwise, drain water may freeze, impairing heating performance.)
3.
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
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would reduce the unit life.
3) Never use piping which has been used for previous installations. Only use parts which are provided with the unit.
4) Do never install a refrigerant drier to this unit.
5) The drying material may dissolve and damage the system.
6) Incomplete or improper flaring may cause refrigerant gas leakage.
4.

Refrigerant Piping

CAUTION
1) Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil
for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully
with the torque wrenches.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Do not apply refrigeration oil to the flare
nut avoid tightening with over torque.

Outdoor Unit Installation (1)

[Apply oil]
Flare nut tightening torque
Gas side Liquid side
3/8 inch 1/4 inch
24.1-29.4ft • Ibf 10.4-12.7ft • Ibf
Set exactly at the position shown below.
A
A
Die
Apply refrigeration oil to the
inner surface of the flare.
Valve cap tightening torque
Gas side
3/8 inch
15.9-20.2ft • Ibf
Service port cap
tightening torque
Bottom frame
Hose (available commercially,
inner dia. 5/8inch)
(Cut exactly at
right angles.) Remove burrs
Flaring
Flare tool for R410A Conventional flare tool
Clutch-type Clutch-type (Rigid-type)
0-0.020" 0.039-0.059"
Flare's inner
surface must
be flaw-free.
[Tighten]
Torque wrench
Spanner
Piping union
Flare nut
Liquid side
1/4 inch
15.9-20.2ft • Ibf
7.9-10.8ft • Ibf
Drain-water hole
Drain plug
Wing-nut type (Imperial-type)
0.059-0.079"
Check
The pipe end must
be evenly flared in
a perfect circle.
Make sure that the
flare nut is fitted.