Step #3
Recover Any Remaining Refrigerant from the Unit
You may need one or two recovery cylinders depending on how much gas in the Cryochiller. Remove the cap from
the recovery cylinder’s vapor access port (the one with the blue hand valve). Evacuate each recovery cylinder
according to the cylinder manufacturer’s instructions. Follow all local and federal codes. US federal law requires
that cylinders be evacuated to 25-29 Hg vacuum.
•Connect the manifold’s center port to your charge recovery system’s inlet. Connect a recovery cylinder to the
outlet of your charge recovery system. (If the discharge side of your recovery system does not have a pressure
gauge, install a gauge between your recovery system and the cylinder.) Connect the suction side of the manifold to
the suction valve on the compressor.
•
Open the valves on the manifold and on the recovery cylinder. Turn on the charge recovery system to pump the
refrigerant out of the Cryochiller.
When the recovery cylinder is filled to its rated pressure, turn off the charge recovery system. Close the valves on
the recovery system and on the recovery cylinder. Remove the full recovery cylinder and connect an empty
recovery cylinder. Continue this process until the unit is evacuated to the required level (per your local codes or to
US federal law which requires refrigerant to be recovered to 10 inches Hg vacuum.)
•
Re-
install the flare cap on the recovery cylinder’s vapor access port.
