Daikin Quaternity H-Series Specifications download pdf (Page 36)

EDUS04-906_b Installation Manual

Room Air Conditioners H-Series 35

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.

Service port cap tightening torque 7.9-10.8ft • lbf (10.8-14.7N • m)

Valve cap tightening torque

Gas side Liquid side

1/4 inch (6.4mm)3/8 inch (9.5mm)

15.9-20.2ft • lbf (21.6-27.4N • m) 15.9-20.2ft • lbf (21.6-27.4N • m)

Flare nut tightening torque

Gas side Liquid side

3/8 inch (9.5mm) 1/4 inch (6.4mm)

24.1-29.4ft • lbf (32.7-39.9N • m) 10.4-12.7ft • lbf (14.2-17.2N • m)

Outdoor Unit Installation (1)

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.)

4. Refrigerant piping.

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.

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.

WARNING

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.)

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.

CAUTION

(Cut exactly at

right angles.) Remove burrs

Set exactly at the position shown below.

Flaring

Die

0-0.020 inch (0-0.5mm)

Clutch-type

Flare tool for R410A

0.039-0.059 inch (1.0-1.5mm)

Clutch-type (Rigid-type)

0.059-0.079 inch (1.5-2.0mm)

Wing-nut type (Imperial-type)

Conventional flare tool

Check

Flare’s inner

surface must

be flaw-free.

The pipe end must

be evenly flared in

a perfect circle.

Make sure that the

flare nut is fitted.

Drain-water hole

Bottom frame

Hose (available commercially,

inner dia. 5/8 inch (16mm))

(B) Drain plug

Torque wrench

Piping union

Flare nut

Do not apply refrigeration

oil to the outer surface.

Flare nut

Apply refrigeration oil to the

inner surface of the flare.

Do not apply refrigeration oil to the flare

nut avoid tightening with over torque.

Spanner

[Apply oil] [Tighten]

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Daikin Quaternity H-Series Specifications Page 36

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