ROTHENBERGER ROREC PRO v.1 - Manual (Page 19)

18 DEUTSCH 18 ENGLISH
INSTRUCTIONS FOR USE AND MAINTENANCE
4. Operation methods
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
7. Connect the unit to a right outlet. (See the
nameplate on the unit)
Switch the power switch to the ON position and
press “Start” to start the compressor.
Note: If the unit fails to start, rotate the Input valve
and the Recover/Purge valve to Purge position. Then
rotate the Recover/Purge valve to Recover position,
and open the Input valve.
Purge
Recover
Open
Liquid
Purge
Close
Purge
START GREEN - COMPLETE
RED - HIGH PRESSURE
ALARM
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.
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 and the
unit shuts down automatically.
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, press “Start” (See “EXPLODED
DIAGRAM” Part No. 10) and get started.
5. Turn INPUT valve to “PURGE” slowly, and
run this unit until desired vacuum level is
achieved and / 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.
Open
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.