Appion G5Twin Operation Manual page 15

Helpful Hints
TIP #3 External Cooling Accessories Between Recovery Unit & Cylinder
Recovering large amounts of vapor (especially on a hot day) can increase the temperature of a recovery
cylinder, and the resulting increased back-pressure can further slow the vapor recovery process. In situations
like these, cooling the recovery cylinder and/or using an External Cooling Accessory (ECA) in a bucket of ice
water can cool off the tank and speed up the recovery process. For maximum recovery speeds, pre-cool the
recovery cylinder (and/or the ECA) by placing it in a bucket of ice water at least 30 minutes prior to beginning
the recovery process. The longer the cylinder is cooled, the better.
How to Make an External Cooling Accessory:
Making an ECA uses the same tools as you would use when installing an AC/R system.
You will need 10 feet of 5/16" (OD) copper tubing, and two (2) 1/4" FL Service Valves.
Connect the service valves to each end of the copper tubing with solder using
industry practices. Then, coil the tubing around a pipe or round object of at least 3"
inches in diameter, and maintaining about 1/2" spacing between each coil. Leave
about 1 foot of the copper tubing straight, and bend it upwards, so that both service
ports are pointing in the same direction, and both extend above the "coiled area," as
in Diagram 9. Prior to using the ECA, verify pressure and vacuum tightness using the
same methods as on an AC/R system.
How to Use an External Cooling Accessory:
The ECA is about 50% submerged in water before adding
ice. Add ice on top, until the ECA is submerged below the
ice level by at least 3 inches. This will help keep the ice
water cooled as the heated vapor travels through the ECA.
Connect the ECA and hoses equipped with ball valves as
shown in Diagram 10. Submerge the ECA in a bucket of ice
water (as described above). Close the ball valve on Hose
"C", and open the ball valves on Hose "A" and Hose "B", as
shown in Diagram 10. Proceed with the Standard Recovery
Procedure as described on Page 9, starting from Step 2,
and continuing through Step 9 (substitute the Recovery
Cylinder Liquid Port in Step 3).
WARNING: After recovery is complete, the ECA and Hoses A,
B and C will contain high pressure refrigerant.
To recover the residual refrigerant from the ECA:
1. Close the G5Twin output valve, Recovery Cylinder
liquid valve, and the ball valve at the end of Hose "A".
2. Disconnect the hoses from the G5Twin input/output.
3. Connect the hoses as shown in Diagram 11.
4. Open the G5Twin output valve, Recovery Cylinder
vapor valve, and all 3 ball valves.
5. Repeat Steps 7-10 from Page 9 to finish the recovery.
G5TWIN OPERATION MANUAL
© 2016 APPION INC. - ALL RIGHTS RESERVED
Diagram 10
A
Diagram 11
A
C
16
Diagram 9
C
B
B