Robinair 17680-2K Refrigerant Recovery Station - Manual (Page 7)

7
Model 176802K Scavenger™ Recovery Unit
Operating Instructions
Sometimes refrigerant will pool inside the system. When the compressor is turned
off, ambient heat will vaporize this pooled refrigerant, causing system pressure to
rise again. The recovery process should be repeated until the system remains at a
vacuum for at least two (2) minutes.
9. When the recovery process is complete, close the tank’s valve, close the hose
valve, and disconnect the recovery hose from the vehicle.
10. Disconnect the compressed air line from the back of the station.
11. Disconnect the black power lead; disconnect the red power lead from the
vehicle’s battery or the 12-volt power source.
12. After each recovery, carefully open the accumulator oil drain (3) and drain any
collected compressor oil into an appropriate container.
Small amounts of refrigerant can remain in the accumulator and build up a slight
pressure — it is best to drain the accumulator when the inlet pressure is in a
vacuum. There may not always be any oil to drain; it will vary from system to
system. Dispose of the old compressor oil in an appropriate manner.
13. The tank’s float switch will automatically shut off the station when the tank is full.
To change a full tank in the middle of a recovery job,
A. Turn off the tank valve, close the ball valve in the 3 /
8
" tank hose, and unscrew
and remove the float cable from the tank.
B. Disconnect the hose from the tank valve, and remove the tank from the
station. Replace it with a new tank. (Prepare new tanks by releasing the dry
nitrogen charge and pulling a five-minute vacuum).
C. Reconnect the tank hose, open the tank valve with the 3 /
8
" hose connected to it,
open the 3 /
8
" hose valve, and reconnect the float cable. Recovery will proceed
as soon as both valves are open.
IMPORTANT! To prevent equipment damage, do not use recovered
refrigerant in any A/C system. Send the full tank to a disposal facility ca-
pable of handling mixed refrigerants.