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When capping, do not use mineral oils for any parts. Failing this can cause shortening of
equipment’s lifetime. Prior to soldering (min. 50% Ag hard), you must fill the piping with
nitrogen gas to prevent flakes. Gas mustn’t be under pressure.
The capping must be done with high-quality refrigerator tools. Cut the piping by a cutting wheel to prevent the production of fillings.
Then remove the edges caused by the cutting wheel. The capping must be done according to parameters mentioned in the table
bellow:
Nut
Hold the torque spanner in right angle to the piping. Only this way it will work correctly.
Dimension of piping
6.35mm (1/4in.) dia.
9.52 mm (3/8 in.) dia.
12.70mm (1/2in.) dia.
15.88 mm (5/8 in.) dia.
19.05 mm (3/4 in.) dia.
Deaerating
1. Unscrew the stopper of the service access on the 3-way valve (gas). Connect the manometer which is suitable for
vacuum measurement and the air-pump.
2. Start up the air-pump and deaerate for about 15-20 minutes. Do not open the 3-way valves!
3. Test the tightness by shutting down the air-pump and checking the manometer after 60 minutes.
4. If there is a need for refrigerant refilling, you can refill the required amount of refrigerant at this moment.
5. After refilling the refrigerant, disconnect the service hose (be aware of refrigerant leakage – use protection aids).
If not refilling the refrigerant, slowly and carefully open the 3-way valve (fluid) and fill the pipping to the level of
static pressure (check the manometer). Now the service hose can be disconnected and stopper of the service access
can be screwed back on.
6. Open both 3-way valves (fluid first). Return stoppers to their previous places and tighten them by the required
tightening torque according to the following table.
7. Check the tightness of the refrigerant circuit by leakage detector.
B
A
Piping
Apply alkyl benzene oil (HAB)
against refrigerant leakage.
Do not use mineral oils!
Tightening torque
14to18N·m (140to180 kgf·cm)
33 to 42 N·m (330 to 420 kgf·cm)
50 to 62 N·m (500 to 620 kgf·cm)
63 to 77 N·m (630 to 770 kgf·cm)
100 to 110N·m (1000 to 1100 kgf·cm)
Outdoor dimension
of piping
Capping tools for R410A
6.35mm (1/4in.)
9.52 mm (3/8 in.)
12.70mm (1/2in.)
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
3-way valve (fluid)
Center piping properly on 3-way valve conus.
23
Oversize A
Diameter
of capping
0 to 0.5
Nut
Piping (fluid)
3-way valve (gas)
Nut
Piping (gas)
9.1
13.2
16.6
19.7
24.0
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