WD Catalog 2018

9-3

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Recovering and Recycling the Refrigerant

Figure 9-1 shows a recovery/recycle machine. Recycle equipment must

meet certain standards as published by the Society of Automotive Engi-

neers and carry a UL approved label. The basic principals of operation

remain the same for all machines, even if the details of operation differ

somewhat.

A full system recovery is not necessary when you service or replace a

compressor with stem type service valves. These valves may be front

seated to isolate the rest of the AC system from the compressor. The

refrigerant stays in the system and only the refrigerant in the compressor

is recovered, recycled and replaced.

Note:

Keep the collection cylinder in an upright position for

the duration of the recovery/recycle cycle to ensure no

liquid is drawn back into the system.

Draining the Oil from the Previous Recovery Cycle

In preparation for recovery, do the following:

Place the power switch and the controller on the recovery unit

in the OFF position.

Plug in the recovery station to the correct power source.

Drain the recovered oil through valve marked OIL DRAIN on

the front of the machine.

Place the controller knob in the ON position. The low pressure

gauge will show a rise.

Immediately switch to the OFF position and allow the pres-

sure to stabilize. If the pressure does not rise to between 5

psig and 10 psig, switch the controller ON and OFF again.

With practice, this procedure should become easier.

Figure 9-1

Recycle station.