Cooling The Recovery Cylinder - JAVAC XTR-PRO-DV Safety Instructions & Operation Manual

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5.0 SET UP AND OPERATION continued

5.5 COOLING THE RECOVERY CYLINDER

5.5.1 The recovery unit can be used to PRE-cool (or SUB-cool) the recovery cylinder if the head
pressure is too high to complete the recovery process. This can occur when working with certain
refrigerants with a high vapour pressure in high ambient temperatures.
5.5.2 If the recovery process stalls out because of high head pressure, stop the recovery unit, shut
off the hose valves and reconfigure the setup as shown below. This can also be done before starting
the recovery process but it may have marginal long term effect. NOTE: This will only work if there is at
least 5 Kg of liquid in the recovery cylinder to develop the necessary pressure differential required.
5.5.3 POWER ON the recovery unit and ROTATE the DISCHARGE Valve (V3) to achieve a pressure
differential of at least 700 Kpa between the LP Gauge and the HP Gauge. KEEP THE HP BELOW
2500 Kpa on the HP Gauge to ensure that the HP Cut-Off Switch will not actuate.
5.5.4 After several minutes of running, the cylinder will be cold. POWER OFF the recovery unit and
reconfigure the setup for NORMAL RECOVERY. Repeat as needed.
VAPOUR
SET-UP PROCEDURE FOR SUB-COOLING METHOD
SYSTEM
RECOVERY UNIT
LIQUID
VALVE POSITIONS FOR PUSH/PULL METHOD
PURGE
OPEN
OPTIONAL
V3
V1
CONNECTION
OPEN
TO SYSTEM
VALVE POSITIONS DURING SUB-COOLING METHOD
14
RECOVERY UNIT
POWER
SOURCE
VAPOUR
LIQUID
CYLINDER
WITH
CT-OFD
SCALE
V2 RECOVER
POWER
SOURCE
PURGE CLOSE
VAPOUR LIQUID
CYLINDER
WITH
CT-OFD
SCALE
FILTER
VALVE POSITIONS DURING SUB-COOLING METHOD
OPEN
V3
OPEN
RECOVERY UNIT
POWER
SOURCE
OPTIONAL
CONNECTION
TO SYSTEM
VAPOUR LIQUID
CYLINDER
WITH
CT-OFD
SCALE
PURGE V2
CLOSE
V1
PURGE CLOSE
RECOVER
OPEN
V3