Using Charging Station

A vacuum pump is built into the charging station and is constructed to withstand repeated and prolonged use without damage. Complete moisture removal from the system is possible only with a vacuum pump constructed for that purpose.
The system refrigerant must be completely recovered before it can be evacuated. Damage to the vacuum pump will result if pressurized refrigerant is allowed to enter.
1. Connect hose to vacuum pump after system refrigerant has been recovered through charging station.
2. Open low side gauge hand valve of charging station.
3. Connect station to 110 volt current.
4. Turn vacuum pump on. Follow instructions included with equipment.
5. Evacuate system with vacuum pump until low pressure gauge reads at least 28 inches of vacuum. Continue evacuating system for an additional 15 minutes for routine system service or 20 to 30 minutes if system components have been replaced.
6. Close low side gauge hand valve, then turn vacuum pump off.
7. Check ability of system to hold vacuum. Watch low side gauge to see that gauge does not rise at a rate faster than 1 inch of vacuum every 4 - 5 minutes. If low side gauge rises at too rapid a rate, install partial charge and leak test, then evacuate system again.
8. If system holds vacuum, charge system with refrigerant.