Gree HNTF24/A-D, Service Manual

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24
Condensing Unit
Service Manual
Bume r
Solder
Downward facing
Side facing
Recommended methed
Upward facing
Figure 3-1-3

Uninsulated connecting pipes and connectors should be packed with sponge and tied with plastic adhesive
tapes.
(2). Vacuum-pumping and leak detection

Dismantle the bonnet of refrigerant valve and air valve.

Align with the center of piping and adequately tighten nuts of connecting pipes by hand

Tighten the nuts with a spanner.

Remove the one way valve cap of air valve.

Unscrew the spool of refrigerant valve for 1/4 turn with a socket head wrench, and at the same time push
up the spool of air valve with a screwdriver to let air give off.

Air exhaust continues for 15 seconds until coolant gas appears, immediately shut off one way valve and
tighten the valve cap.

Totally open the spool of refrigerant valve and air value (as shown in Figure 3-1-4)
One-Way Va lv e
Gas Va lv e
Liquid Val ve
Va lv e Cap
Inner Hexagon
Spanner
Screwd rive r
Va lv e Stem
Figure 3-1-4

Tighten the valve caps and use soapy water or a leak detector to check any leakage on indoor unit,
outdoor unit and connection parts of pipes.
Caution:
If conditions are allowed, a vacuum pump shall be used for drawing off air inside the system at a valve. Method
for creation of vacuum by using a vacuum pump is as follows:

Take out the nut cover of the inlet for refrigerant.

Connect the tube of the vacuum watch with the vacuum pump, having the low-pressure end linking to the
inlet for refrigerant. (As shown in Figure 3-1-5)