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WA900-3EO
COMMISSIONING
SYSTEM EVACUATION
- General Instructions
To correctly evacuate the system proceed as follows:-
1. Check the compressor suction and discharge service
valves are both open, ie. midway between being fully
front-seated or fully back-seated.
2. Attach the manifold gauge set to the compressor service
vales. Close the manifold set hand valves. Note: Ensure
that the manifold gauge set hoses are equipped with “dill
Depressor” fittings to enable opening of the Schrader
valves.
3. Connect the service (centre) hose on the gauge set to
the intake port on the vacuum pump.
4. Ensure that the vacuum pump discharge valve is
closed.
5. Switch the vacuum pump on and open the hand valves
on the gauge set. Open the vacuum pump discharge
valve after the vacuum pump has started. Low pressure
gauge should quickly pull down to 0.5mm Hg. of vacuum
on the low side gauge of the manifold gauge set.
6. Evacuate for 5 minutes then close both hand valves and
switch off the pump. If the low pressure gauge holds a
steady vacuum for 5 minutes, that is a good indication
there are no leaks in the system.
7. Switch on the pump and open the hand valves on the
gauge set. Evacuate for a minimum one hour.
8. When the evacuation is complete close both hand
valves, switch off the pump and disconnect the service
hose from the pump.
9. Fully back seat both compressor service valves.
COMMISSIONING
