When removing refrigerant from some refrigeration systems, a significant amount of time can be saved by recovering, recycling or reclaiming the refrigerant in its liquid state.
Weigh and record the weight of the refrigerant reclaim cylinder on a note pad or paper.
Remove any visible dirt or other foreign particles from the manifold gauge hose ends and the valve.
It is recommended that the hose ends of the manifold gauges be equipped with check valves or quick couplers.
These valves reduce refrigerant emissions into the environment and provide protection against refrigerant burns.
Connect the reclaim cylinder to the recover/reclaim hose located on the manifold.
Connect the low side manifold hose to the low side valve on the reclaim unit, and the high side hose to the high side valve on the reclaim unit.
Purge the recovery/reclaim manifold hose connection by having the hose connection loosely connected at the reclaim unit and reclaim cylinder.
Crack the high and low pressure valves at the manifold for about two seconds, then close both valves.
Tighten the hose connections at the reclaim unit and reclaim cylinder.
Note: This is becoming an obsolete practice as check valves and quick disconnect hose ends are becoming the new standard.
Open the low and high side valves on the manifold and open the reclaim cylinder valve.
Start reclaim unit and recover refrigerant in either its vapour or liquid state to the reclaim cylinder.
Become familiar with your unit and the manufacturer’s procedure on how to recover refrigerant.
During the reclaim procedure, constant monitoring of the weight or volume of the refrigerant being recovered is essential.
Care and caution must be exercised at all times when filling cylinders!
Never overfill a cylinder!
During the refrigerant recovery process, any components that are very cold or frosty should be warmed by a heat gun.
Monitor the cylinder pressure and continue to recover refrigerant until you have recovered the entire refrigerant charge.
Ensure that the high and low side manifold valves, reclaim unit and reclaim cylinder valves are closed.
Remove the low pressure hose by applying pressure against the hose connection to keep it seated while you unthread the knurled nut.
Remove the high pressure hose by applying pressure against the hose connection to keep it seated while you unthread the knurled nut.
With the reclaim unit and reclaim cylinder valves closed, apply pressure against the hose connection to keep it seated while you are unthreading the knurled nut.
The refrigerant reclaim cylinder can now be labeled and shipped back to the manufacturer or reprocessing facility.
When non-contaminated refrigerant is removed from the system and is to be recycled back into the system, the recycling unit and reclaim cylinder can remain attached to the system with all valves in their closed position.
After repairs have been made, the refrigerant can then be recharged back into the system.
When all refrigerant is reused/recycled and is the same refrigerant you removed from the system, it is suggested practice to record this transaction in your logbook.
The air conditioner must be marked with the correct refrigerant charge for future reference.
As a trained certified technician under MR 103/94, you must ensure the following has been recorded prior to leaving the job site:
A copy of the record must be left with the equipment owner or operator of the equipment.