Thermo King TriPac Envidia, Installation Manual

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36
A/C System Evacuation and Leak Check Procedures
System Evacuation Procedures
Special Tools Required
Vacuum Pump (204-713 or equivalent)
Micron Gauge (204-720)
Refrigerant Leak Detector (204-712)
Gauge Set with R134a Adapters
IMPORTANT: Always use recommended vacuum equipment. Before each use, check that there are no leaks in the
vacuum equipment either in the pump itself or in the hoses. The oil in the evacuation station vacuum pump should
be changed after each use.
NOTE: While the system is being evacuated, continue the installation with D2/D4 Heater if applicable.
1. Connect gauge manifold to suction and discharge service ports at the Evaporator/Control Box.
2. Connect service line of the gauge manifold to vacuum pump and micron gauge.
3. Open gauge manifold and vacuum pump valves and gauge manifold hand valves.
4. Start vacuum pump and evacuate until system reaches 500 microns.
5. Once system reaches 500 microns, continue evacuation for one additional hour .
6. Close vacuum pump isolation valve, switch off pump. Check that the gauge reading for the system does not
exceed
2000 microns in the following five minutes. If vacuum level exceeds 2000 microns before five
minutes, and continues to rise, proceed to the Leak Check Procedures section. If it stops in a vacuum
continue to evacuate for an additional 30 minutes.
7. If vacuum level remains below 2000 microns for 5 minutes the system is leak free and ready to be filled with
refrigerant.
8. Close manifold hand valves and remove evacuation equipment.
Leak Check Procedure
1. Add vapor R-134a to the unit until bottle pressure is reached.
2. Thoroughly leak check the system with an electronic leak detector.
3. If leak(s) are found, recover leak check charge.
4. Repair any leaks and re-evacuate system.