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What Do You Need to Do Before Replacing That Defective Part? Refrigerant Recovery

This involves the complete removal of all refrigerant from a system into an approved container.
This refrigerant can then be reclaimed or properly destroyed.
Refrigerant recycling is the process that removes the contaminants from the refrigerant and then reuses the refrigerant again.
Refrigerant reclamation is the processing of used refrigerant to meet industry product standards in purity.
This reclamation process is usually done in an EPA approved facility.
All tools and HVAC supplies used should meet Industry standards for safety.
Refrigerant Recovery Procedures begins with the selection of the correct HVAC tools, the appropriate recovery equipment which includes recovery cylinders, properly mark as such.
A manfold gauge set with hoses rated for the pressures and refrigerant you are recovering.
A scale is also needed to weigh the cylinders so they will not be over filled.
Caution: Do not fill cylinders more than 80% full.
Because liquid refrigerant expands as its temperature increases, it must never be placed into a container with no room to expand.
Then finally you must have the correctly sized recovery machine for the system.
To set-up the recovery machine for evacuation requires many little steps.
Though these steps are small in comparison to the over-all task, nevertheless they are very important to the success of the recovery operation.
The first task to be done is the unit needs to turn off and locked-out so no one can turn the unit on without your knowledge.
The next step is to determine the type of recovery method to use.
The vapor recovery method is the most often used.
Two other methods are gaining in popularity, being the push-pull type and the liquid recovery method.
Once it has been decided which method to use, the next step is the connection of the hoses.
We will show as an example the proper connections for the vapor recovery method.
Connect a hose from the discharge side of the recovery machine to the liquid port on the recovery tank.
Place the recovery tank on the refrigerant scale.
Connect a hose from the center port on the manifold set to the low-side service port of the HVAC unit.
Then connect the hose from the low-side port of your manifold set to the suction side of the recovery machine.
To be able to read the pressures in the recovery tank connect the high-side port on the manifold set to the vapor port on the recovery tank.
Before turning on the recovery machine the valves on the manifold set need to closed and the valves on the liquid and vapor ports of the recovery tank need to be open.
It is now time to turn on the recovery machine.
This HVAC tool should continue to run until the appropriate vacuum for the refrigerant used is attained.
When this point is achieved, all valves should be closed and the recovery machine can be disconnected from the system.
It is now the proper time to repair or replace those defective parts.


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