HVAC Procedure and Performance Guide

Transfer refrigerant from storage bottle to charging cylinder

Training for this procedure can be found in these courses:

                         131 – Oil Heat l  and  161 – Boilers l


Specified amount of liquid refrigerant must be transferred from storage cylinder to graduated charging cylinder. Applicable safety procedures must be followed. (Caution: Charging cylinder should be used only when charging refrigeration system and should not be used for storage).


  1. Collect tools, equipment and materials.
  2. Put on safety and protective equipment and apparel.
  3. Place refrigerant cylinder upright and connect charging hose to cylinder.
  4. Place charging cylinder at lower level than refrigerant cylinder and connect charging hose loosely to bottom valve.  (Note: Do not tighten to seal).
  5. Crack valve on refrigerant cylinder, purge air from charging hose and then close valve.
  6. Tighten connection on charging cylinder.
  7. Invert refrigerant cylinder.
  8. Open valves on charging cylinder and refrigerant cylinder, crack vent valve on top of charging cylinder and allow liquid refrigerant to flow into charging cylinder until desired level is reached.
  9. Close valve on refrigerant cylinder and close vent valve on top of charging cylinder.
  10. Allow charging line to warm until it is free of liquid; then close valve on charging cylinder.
  11. Return refrigerant cylinder to upright position and place alongside charging cylinder.
  12. Loosen hose connection carefully on charging cylinder and bleed pressure from hose.  (Note:  Exercise caution as some liquid refrigerant may still be present in the charging hose).
  13. Remove charging hose.
  14. Remove safety and protective equipment and apparel.
  15. Gather tools, equipment and leftover materials, and leave work site clean.