Vapor
Schrader Valve Core
Removal Tools (optional)
3 Port
Manifold
with
Micron
Gauge
Hose with
Shut-off Valve
Liquid
21
20
Evacuation with a 3 Port Manifold
This is a common, but less than ideal evacuation
method Read the tech tips (page 12) for optimum
gauge placement and variations to reduce
recovery times
1. Always fill with fresh Fieldpiece Vacuum Pump Oil (page 24).
Running the pump without oil will damage the pump and void the
warranty. Oil can be drained while the pump is running if refilled
within 3 minutes (within 30 seconds to maintain your vacuum).
2. Ensure the motor power switch is turned OFF (left).
3. Plug into an outlet (oil backlight should illuminate).
4. Ensure the gas ballast is closed (vertical) (page 26).
5. Connect to the empty, depressurized A/C system.
6. Turn the motor power switch to ON (right).
7. Open line set (hoses, manifolds, removal tools, etc.) to expose the
pump to the system.
To reduce oil contamination early in the job, open the gas ballast until
the sound of the pump quiets down (about 3000 microns). The yellow
LED in the oil window shines if the ballast is open.
8. After the appropriate vacuum is reached, isolate the system from
the pump. You can check the system for potential leaks at this time
by monitoring your micron gauge.
Your vacuum pump has a unique oil suck back prevention feature
to keep your hoses clear of oil. Still, it’s good practice to release the
vacuum at the input port before turning off the pump.
9. Turn the motor power switch to OFF (left), remove your hoses, and
cap the ports to keep components free of contaminants.
10. Disconnect from the system and unplug from power at the outlet.
11. Drain the contaminated oil while the oil is still warm to keep the
pump as clean as possible when stored.
