Section
5
Sealed System
5
-12
Recovering Refrigerant
Recovering refrigerant is the first step in preventive
maintenance or repair of equipment. Simply put,
recovery means transferring the systems refrigerant into
a refillable refrigerant tank.
The first step is to have on hand, clean, safe, refillable
refrigerant tank evacuated to 25 microns, and labeled
for each different type of refrigerant you will be working
with. Example; for repairing Electrolux Home Products
Inc. built products you will need one refrigerant tank for
R-12, one for R-22, one for R-410A, one for R-134a, and
one for R-500 if working on dehumidifiers.
Second step is you must have dedicated equipment
for HFC (R-410A) refrigerant. Because of the difference
in the oil and the refrigerant, you can not use the same
equipment on HFC based refrigerants as used on CFC
based refrigerants.
Required Recovery Equipment
1. 2 - Line piercing valves.
2. 1 - Recovery unit.
3. 1 - Refrigerant tank labeled and color coded per
refrigerant type.
4. 1 - Scale.
To recover the refrigerant:
1. Disconnect unit from source of power.
2. Attach an approved self tapping line tap valve to the
process tube. Connect refrigerant recovery system
to tap valve. Turn on recovery system, open the
line tap valve, and allow refrigerant to flow into an
approved tank. (See Figure 6-5 )
3. Allow the recovery pump to run until the system has
reached 13 inches of vacuum.
4. Shut system down and allow to set for two minutes.
If pressure is below (0) pounds per square inch,
disconnect equipment and proceed with repair.
5. If pressure does not stay bellow (0) pounds per
square inch, repeat steps 3 and 4 until all refrigerant
is removed and system remains in a vacuum.
Always make sure your equipment is in good
condition and all manufacture instructions are
followed to prevent the accidental rupture of a
hose, connection fitting, or a tank, that could
cause a serious injury. Always sit the tank on a
scale when you are transferring refrigerant into
the tank. Always check the weight to see when
the tank is full, do not over fill the tank.
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5
-5. Diagram of Recovery Equipment
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Your Country may have regulations or restrictions
governing the discharging of chloro uorocarbons
Therefore, when discharging or purging the sealed
system, use an approved refrigerant recovery system.
Summary of Contents for AF-S100RX
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