MAHLE ROU250, Operation Manual, Page: 7 / 20

Rou250
ROU250
ROU250 en
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Operation
6. Operation
6.1
Standard liquid/vapor recovery procedure
.
1. Make sure this recovery machine is in good operating
condition.
2. Make sure all connections are correct and tight .
3. Open the liquid port of the storage tank.
4. Make sure the MODE valve is set on RECOVER.
5. Open the output port of the recovery machine.
6. Open the liquid port on your manifold gauge set;
opening the liquid port will remove the liquid from the
system first. After the liquid has been removed, open
the manifold vapor port to finish evacuating the
system.
7. Connect the recovery unit to an appropriate outlet.
(See the nameplate on the machine) Switch the power
switch to the ON position to start the compressor.
8. Slowly open the input port on the machine.
A) If the compressor starts to knock, slowly throttle
back the input valve until the knocking stops.
B) If the input valve was throttled back, it should be
fully opened once the liquid has been removed from
the system (the manifold gauge set vapor port should
also be opened at this time).
9. Run until desired vacuum is achieved.
A) Close the manifold gauge sets vapor and liquid
ports.
B) Turn off the machine.
C) Close the unit's input port and proceed with the
SELF–PURGE PROCEDURE on the next page.
Note:
Note: Note:
Note:
If the recovery machine If the recovery machine If the recovery machine If the recovery machine fails to start, rotate the fails to start, rotate the fails to start, rotate the fails to start, rotate the
INPUT valve and the MODE valve to purge
INPUT valve and the MODE valve to purge INPUT valve and the MODE valve to purge
INPUT valve and the MODE valve to purge
position. Then rotate the MODE
position. Then rotate the MODE position. Then rotate the MODE
position. Then rotate the MODE valve back to
valve back to valve back to
valve back to
recovery position, and open the INPUT recovery position, and open the INPUT recovery position, and open the INPUT recovery position, and open the INPUT valve. valve. valve. valve.
Caution:
Caution: Caution: Caution:
Always purge the unit after each use. Failure to Always purge the unit after each use. Failure to Always purge the unit after each use. Failure to Always purge the unit after each use. Failure to
purge the remaining refrigerant from
purge the remaining refrigerant from purge the remaining refrigerant from purge the remaining refrigerant from the unit the unit the unit the unit
could result in the acidic degradation of internal could result in the acidic degradation of internal could result in the acidic degradation of internal could result in the acidic degradation of internal
components, ultimately causing premature
components, ultimately causing premature components, ultimately causing premature
components, ultimately causing premature
failure.
failure. failure.
failure.