Charging System With Charging Cylinder or Service Unit
NOTE: The filling cylinder (12) serves for the accurate filling of the desired quantity by weight of refrigerant.
If the temperature of the refrigerant, which is inside the closed cylinder, is increased, the pressure and the specific volume of the liquid refrigerant will also be increased.
If an accurate quantity by weight is taken from a cylinder provided with a sight glass, it will be necessary to compensate the changes in specific weight caused by the changing temperature.
By reading the pressure on the pressure gauge (15) and by adjusting this pressure on the upper scale of the rotatable plastic cylinder (20), and with reference to refrigerant to be filled in as stated on lower rim of rotatable plastic cylinder, the changes in volume under the influence of temperature can be compensated. Since the air-conditioning system is filled with R 12, set scale for R 12 at lower rim of plastic cylinder when filling up.
Assembly tester with connections
Attention! When filling with the service unit, make sure that valve (19) for torr meter (vacuum meter) is closed. If the torr meter is under a pressure of above 1.2 bar, meter is defective and can no longer be used.
Filling With Filling Cylinder:
- Connect a hose line to valve (24) at bottom on filling cylinder (12) and to valve (17) on refrigerant bottle. Then place refrigerant bottle (16) on its head (with valve in downward direction).
- Open valves (14, 17 and 24) on filling cylinder and on refrigerant bottle. Open valve (13) at top on filling cylinder for a short moment so that air and gas can escape from filling cylinder.
NOTE: Heating of refrigerant bottle in water bath up to max. 40 °C (for safety reasons other heat sources may not be used) will considerably accelerate the filling procedure.
- As soon as liquid refrigerant shows up in sight glass, close valve (14). Turn plastic cylinder in such a manner that the reading on its upper pressure scale agrees with pressure indication on pressure gauge (15) using graduated scale for R 12.
- Open valve (14) again and add specified quantity of refrigerant. Then close valves (14, 17 and 24).
- Unscrew hose line from refrigerant bottle.
- When working with filling cylinder and assembly tester, connect hose line (10) to center connection of assembly tester (2). When filling in gas (via suction end) connect hose line (10) to valve (13). When filling in liquid (via pressure end) connect hose line (10) to valve (14).
- Switch on electric heater installed in filling cylinder (12). The electric heat will increase the pressure in filling cylinder. When filling in liquid refrigerant a pressure of at least 7 bar is required. The higher the pressure, the faster and more complete will the liquid refrigerant flow into system.
York refrigerant compressor Engine 110
- Remove closing caps (1) from service valves and connect hose lines (5 and 9).
- Evacuate air conditioning system.
Delco refrigerant compressor Engines 116 and 117
Filling In Liquid Refrigerant:
- Close valve (A and 19). Open valve (B) on assembly tester (2) and open valve (14) on filling cylinder (12).
- Watch refrigerant level in sight glass of filling cylinder until the specified quantity of refrigerant is completely in system. Open valve (A).
- Switch on air conditioning system and set to full refrigerant capacity.
- As soon as the increased pressure in pressure gauge is identical with pressure in suction pressure gauge, close valves (A and B) again. Opening of valve (A) will deliver the refrigerant still in hose line (10) into system.