Outdoor Unit Installation - Daikin H-Series Engineeiring Data

EDUS04-904
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" in 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) 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 from 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 flare
nut avoid tightening with over torque.
Gas side
1/2 inch
36.5~44.5ft • Ibf 45.6~55.6ft • Ibf
Room Air Conditioners H-Series

Outdoor Unit Installation

[Apply oil]
Do not apply refrigeration
oil to the outer surface.
Flare nut
Flare nut tightening torque
Liquid side
5/8 inch 1/4 inch
10.4~12.7ft • Ibf
(Cut exactly at
right angles.)
Set exactly at the position shown below.
A Flare tool for R-410A
Clutch-type
A 0 ~ 0.020"
Die
Apply refrigeration oil to the
inner surface of the flare.
Spanner
Piping union
Valve cap tightening torque
Gas side
1/2 inch 5/8 inch
35.5~44.0ft • Ibf 32.5~39.7ft • Ibf
Service port cap tightening torque
Installation Manual
Drain-water hole
Bottom frame
Drain plug
Hose (available commercially,
inner dia. 16mm)
Remove burrs
Flaring
Conventional flare tool
Clutch-type (Rigid-type) Wing-nut type (Imperial-type)
0.039 ~ 0.059" 0.059 ~ 0.079"
Check
The pipe end must
Flare's inner
be evenly flared in
surface must
a perfect circle.
be flaw-free.
Make sure that the
flare nut is fitted.
[Tighten]
Torque wrench
Flare nut
Liquid side
1/4 inch
15.9~20.2ft • Ibf
7.9~10.8ft • Ibf
55