ROTHENBERGER ROREC v.1 - Manual (Page 21)

20
INSTRUCTIONS FOR USE AND MAINTENANCE
6. Throttle the Output valve of the unit so that the
output pressure is 100psi greater than the input
pressure, but never more than 300psi.
7. Run until tank is cold
4.5. Tank Cooling Procedure in the recovering process
1. Open the vapor valve of the storage tank (it is
closed while recovering).
2. Close the two valves of the manifold gauge set.
3. Follow the sixth and seventh items of the
Pre-work Cooling Procedure.
4.4. The storage cooling method
Pre-work cooling procedure
1. To start you must have a minimum of 0.5kg of
liquid refrigerant in the tank.
2. Turn the Recover/Purge valve to the Recover
position.
3. Open the Vapor and Liquid valve of the storage
tank.
4. Power on, and start the compressor.
5. Open the Input valve and Output valve of the
unit.
Output
Filter
Liquid
Input
Vapor
Refrigerant
recovery
tank
Input
Liquid
HVAC System
Liquid Vapor
Vapor
Manifold
gauge set
Refrigerant
recovery
machine
Recovery
tank Recovery tank
A scale must be used to avoid
overfilling the recovery tank
Filter
Output
PROBLEM CAUSE ACTION
Fan does not run
when power Switch is
in “ON” position Power supply cord not attached Voltage
is not right
The circuit breaker has cut off Attach the power supply cord.
Check the power supply at job site.
Press the button to reset.
Fan runs but
compressor does not
start when the Start
Switch is in “ON”
position
The unit is in high pressure shut off
Output pressure is too high
Failure in motor, or other electrical
components
Reduce pressure and then press the
button of the High Pressure Switch.
Rotate Input valve to “CLOSE”, Purge
valve to “PURGE”, then rotate Input
valve back to “OPEN”, Purge valve to
“RECOVER”.
Factory service required
Compressor starts but
cuts off within a few
minutes
Purge valve is in “PURGE” position
Output valve is not open and high pressure
activates
Recovery tank valve is not open Rotate Purge valve to “RECOVER”
Rotate Output valve to “OPEN”
Open recovery tank valve
Recovery process too
slow
Head pressure too high
Compressor seals are worn
Reduce tank temperature with
Storage Tank Cooling Method
Factory service required
Unit does not pull out
a vacuum Connecting hoses are loose
Leakage in unit Tighten the connecting hoses
Factory service required
5. Troubleshooting