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 (heat pump-models).
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 (30mm) 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 lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incomplete 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.
Flare nut tightening torque
Gas side
3/8 inch (9.5mm)
24.1-29.4ft • lbf (32.7-39.9N • m)
Outdoor Unit Installation (1)
[Apply oil]
Apply refrigeration oil to the
inner surface of the flare.
Liquid side
1/4 inch (6.4mm)
10.4-12.7ft • lbf (14.2-17.2N • m)
(Cut exactly at
right angles.)
Set exactly at the position shown below.
A
Flare tool for R410A
Clutch-type
A
0-0.020 inch (0-0.5mm)
Die
Torque wrench
Spanner
Piping union
Valve cap tightening torque
Gas side
3/8 inch (9.5mm)
15.9-20.2ft • lbf (21.6-27.4N • m)
Service port cap tightening torque
Drain-water hole
Bottom frame
(B) Drain plug
Hose (available commercially,
inner dia. 5/8 inch (16mm))
Remove burrs
Flaring
Conventional flare tool
Clutch-type (Rigid-type)
Wing-nut type (Imperial-type)
0.039-0.059 inch (1.0-1.5mm)
0.059-0.079 inch (1.5-2.0mm)
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]
Flare nut
Liquid side
1/4 inch (6.4mm)
15.9-20.2ft • lbf (21.6-27.4N • m)
7.9-10.8ft • lbf (10.8-14.7N • m)
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