1B-16 AIR CONDITIONING Charging The Refrigerant System There are various methods of charging refrigerant into the air conditioning system. These include using ACR 4 (R-134a Refrigerant Recov- ery/ Recycling/ Recharging/ System) or equivalent and direct charging with a manifold gauge charging station. ACR 4 (115V 60Hz): 5-8840-0629-0 (J-39500-A) ACR 4 (220-240V 50/60Hz): 5-8840-0630-0 (J-39500- 220A) ACR 4 (220-240V 50/60Hz Australian model): 5-8840- 0631-0 (J-39500-220ANZ) Charging procedure ACR 4 (or equivalent) method For the charging of refrigerant recovery by ACR 4 (1), follow the manufacture’s instruction. N1A0068E 1. Connect the gauge manifold.
High-pressure valve (HI) — Discharge-side Low-pressure valve (LOW) — Suction-side 2. Discharge and recover the refrigerant. 3. Connect the center hose of the gauge manifold set to the vacuum pump inlet. 4. Operate the vacuum pump, open shutoff valve and then open both hand valves. 5. When the low-pressure gauge indicates approx. 750 mmHg (30 inHg), continue the evacuation for 5 minutes or more. 6. Close both hand valves and stop the vacuum pump. 7. Check to ensure that the pressure does not change after 10 minutes or more. N1A0067E If the pressure changes, check the system for leaks. If leaks occur, retighten the refrigerant line connec- tions and repeat the evacuation steps. 8.
If no leaks are found, again operate the vacuum pump for 20 minutes or more. After confirming that the gauge manifold pressure is at 750 mmHg(30 inHg), close both hand valves. 9. Close positive shutoff valve. Stop the vacuum pump and disconnect the center hose from the vacuum pump.