McQuay M5WMX Spezifikationen PDF herunterladen (Seite 20)

Piping Works

• Do not use contaminated or damaged copper tubing. Do

not remove plastic, rubber plugs and brass nuts from the

valves, fittings, tubings and coils until you are ready to

connect suction or liquid line into valves or fittings.

• If any brazing work is required, ensure that the nitrogen

gas passed through coil and joints while the brazing work

is being done. This will eliminate soot formation on the

inside walls of the copper tubings.

• Cut the connection pipe with a pipe cutter.

• Remove burrs from cut edges of the pipes with remover.

Hold the end of the pipe downwards to prevent metal

chips from entering the pipe.

• Insert the flare nuts, mounted on the connection parts of

both the indoor unit and outdoor unit onto the copper

pipes.

• Flare the pipe with extra length above the flaring tool as

shown in the table below.

• The flare edge must be even and not cracked or

scratched.

Copper tube

Swaging block

∅ Tube, D A(mm)

Inch mm Imperial Rigid

1/4” 6.35 1.3 0.7

3/8” 9.52 1.6 1.0

1/2” 12.70 1.9 1.3

5/8” 15.88 2.2 1.7

3/4” 19.05 2.5 2.0

PIPE CONNECTION PIPE CONNECTION PIPE CONNECTION

INDOOR

UNIT A

INDOOR

UNIT B

INDOOR

UNIT C

INDOOR

UNIT B

INDOOR

UNIT A

INDOOR

UNIT C

INDOOR

UNIT B

INDOOR

UNIT A

INDOOR

UNIT D

Pos. M5MSX020A/AR M5MSX025A/AR M5MSX030A/AR

Liquid Gas Liquid Gas Liquid Gas

A 1/4” 3/8” 1/4” 3/8” 1/4” 3/8”

B 1/4” 3/8” 1/4” 3/8” 1/4” 3/8”

C 1/4” 3/8” 1/4” 3/8”

D 1/4” 3/8”

Cutting copper tube

1/4t

Remove burr Indoor

Piping connection to the units

• The outdoor unit is equipped with two to

four sets of flare joints depending on O/D

unit model. Refer to table below for flare

joint size and location.

• In the case where gas pipe from the indoor

unit does not match the outdoor flare joints,

two different flare joint connectors are

provided. The connector should be connected

as shown in figure.

No Flare Joint Connectors

1 3/8” to 1/2” connector

2 1/2” to 3/8” connector

• Align the center of the piping and tighten the

flare nut sufficiently with fingers.

• Finally, tighten the flare nut with the torque

wrench until the wrench clicks.

Pipe Size mm / (in) Torque Nm /(ft - Ib)

6.35 (1/4) 18 (13.3)

9.53 (3/8) 42 (31.0)

12.70 (1/2) 55 (40.6)

FLARE JOINT CONNECTOR

FLARE TUBE

INDOOR PIPING

FLARE NUT

SPANNER

TORQUE WRENCH

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 66 67

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