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Fieldpiece MR45 - Controls; Port Routing Control; Display and Buttons Overview

Fieldpiece MR45
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LV
Vapor
Liquid
Filter Drier
Cylinder
Schrader Valve Core
Removal Tools (optional)
Sight Glass (optional)
2726
Push/Pull Recovery
This method is only for larger systems with at
least 30 lbs (14 kg) of liquid refrigerant. It’s used
to recover liquid before recovering vapor.
CAUTION: Understand all class A2L refrigerant warnings and notices if
applicable (pages 4-6).
1. Close valves of recovery cylinder and MR45.
2. Set up as shown in the diagram.
3. Open valves of liquid hose and removal tool at liquid system port.
4. To purge air from system liquid hose, briefly unseat hose fitting at
cylinders liquid port until vapor is seen.
5. Fully open liquid valve of recovery cylinder and allow to
pressurize.
6. Set MR45 to RECOVER.
7. Press START to begin recovery.
8. Fully open vapor valve of recovery cylinder.
9. To purge air from hoses briefly unseat hose fitting at vapor
system port until vapor is seen.
10. Open valves of vapor hose and removal tool at vapor system port.
11. When liquid recovery is complete, press STOP to stop motor.
12. Close all valves and proceed to Direct Vapor Recovery (page 25).