6
HIGH SPEED DIRECT LIQUID RECOVERY
The following is recommended to maximize recovery rates;
A. Use the shortest length of 1/4” ID refrigeration hose on the suction side and discharge
side of the unit.
B. If the refrigerant is clean, remove all suction side filters, screens, etc...
C. Remove all Schrader type valve cores and any valve depressors from the hoses and
service valves.
D. Use an evacuated DOT tank.
E. Install a hose between the DOT recovery tank and vapor service valve on the A/C system
being serviced. (See Diagram - 2)
F. Use 90lb DOT recovery tank or larger to minimize tank change over.
1. Connect the unit as shown in Diagram - 2. The technician will need to use a refrigerant
manifold (with sight glass) and two spare hoses. The manifold should be connected
between the unit being serviced and the TR19 IN port. Connect a refrigerant hose from the
TR19 OUT port to an evacuated DOT recovery tank liquid valve. Connect another refrigerant
hose from the DOT tank vapor port to a service port of the unit being serviced.
Note: The recovery tank must be rated for (38 bar) 550 PSI.
2. Open both the vapor and liquid valves on the DOT recovery tank.
3. Keep the manifold valves closed at this time.
4. Push the main power switch “ON”.
5. Once unit has started, open the LO manifold valve on the manifold to start the liquid
refrigerant flow to the TR19. Monitor the liquid refrigerant flow in the manifold sight glass.
Note: The TR19 is designed to directly recover large amounts of liquid refrigerant. If
during vapor recovery process the compressor begins to make a slugging or hammering
noise, meter the incoming liquid refrigerant by closing the low side manifold valve until
the noise subsides.
6. Once liquid refrigerant is no longer present in the manifold sight glass, close the DOT
recovery tank vapor valve. This will transition the unit into direct vapor recovery.
7. Allow the TR19 to run continuously. When a 10” hg. vacuum is observed on the low side
manifold gauge, close both the LO & HI side manifold valves off.
8. If the pressure on the LO side manifold gauge starts to rise, open LO side manifold valve
and restart the TR19. lf the LO side manifold gauge remains in a vacuum, close all tank,
manifold and hose valves. Remove discharge hose from TR19 outlet port. Recovery and
Self-Clearing are now complete.
Diagram 2 - High Speed Direct Liquid Recovery
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