ROTHENBERGER ROREC v.1 - Manual (Page 19)

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Recover
Open Open Liquid
Purge
Close
2) 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.
1) Close the manifold gauge sets vapor and
liquid ports.
2) Turn off the unit.
3) Close the unit’s input port and proceed with
the Self-Purge Method on the next page.
CAUTION: Always purge the unit after each use.
Failure to purge the remaining refrigerant from
the unit could result in the acidic degradation of
internal components, ultimately causing premature
damage.
4.2. Self purging method
Procedure for purging remaining refrigerant
from this unit
1. Turn INPUT valve to CLOSE; OUTPUT valve to
OPEN, and recovery tank valve to OPEN.
2. Turn the Recover/Purge valve to the Purge
position.
3. Check the connection hose, and ensure all
connections are correct and tight. (Same as
recovery mode)
4. Power on and get started.
5. Turn INPUT valve to “PURGE” slowly, and run this
unit until desired vacuum level is achieved or low
pressure protector shuts-off automatically.
6. Close the ports on the recovery tank.
7. Turn the Power-off, disconnect all hoses and dry
the filter.
8. Turn Self-purging to “RECOVER” position, and both
INPUT and OUTPUT valves to “CLOSE” position.
9. Finally, cover the cap on INPUT and OUTPUT
connection adaptor.
INSTRUCTIONS FOR USE AND MAINTENANCE
4. Operation methods
4.1. Standard liquid/vapor recovery method
1. Make sure the unit 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 Recover/Purge valve is set on
Recover.
5. Open the output port of the unit.
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.
Output
Input
Liquid
Manifold
gauge set
HVAC-UNIT/APPLIANCE
CONTAINING REFRIGERANT
Vapor
Filter
Recovery
tank
Liquid
REFRIGERANT
RECOVERY
MACHINE
A scale must be used to avoid
overfilling the recovery tank
Purge
Recover
Open Open
Liquid
Purge
Close
Purge
Purge
7. Turn “INPUT” valve to “LIQUID” position slowly.
Caution:
--- If the power turns off after starting for some
reason, please try to restart, and if it does not
work, please turn input valve to “CLOSE”. Then
turn the power on again, press “START”to start
the compressor, and turn the INPUT valve to
“LIQUID” slowly.
8. Slowly open the input port on the unit.
1) If the compressor starts to knock, slowly
throttle back the input valve until the
knocking stops.