Evacuating The A/C System

1. Connect refrigerant recovery and recycling station to high and low side service ports. Pull vacuum on system and evacuate for 20-30 minutes. Note vacuum gauge reading.
2. Close high and low side service valves.
3. Watch low side gauge for vacuum loss (1 to 3 minutes).
^ If loss is less than 3.38 kPa (1 in. Hg) from level recorded in Step 1, proceed to charging the A/C system.
^ If vacuum loss is greater than 3.38 kPa (1 in. Hg) from level recorded in Step 1, charge with 0.23 kg (1/2 lb.) R-134a. Leak test, repair leaks, and re-test.

IMPORTANT: Disconnect high side service valve from service port and check for vacuum loss before leak testing.