Polycold Cryochiller
Installation
Installation and Operation Manual
Check the Refrigerant Line and Cryosurface for Leaks
Brooks Automation
214072 Revision B
4-31
Correct a Leak in a Parker UltraSeal Compatible or Cajon VCR Coupling
1.
Cover the lower access hole with a finger and apply leak detector soap to the higher
access hole. Observe the higher access hole for at least 2 minutes.
If a bubble forms, verify that the coupling is tightened to within specification.
2.
Check for leak again.
•
If the leak is repaired, return to the previous procedure.
•
If the coupling still leaks, reassemble the coupling as follows:
a.
Open the discharge valve on the manifold to release the gas in the refrigerant line and
cryosurface.
b.
Perform the Zero Line Loss Procedure and then disassemble the coupling. See
G: Zero Line Loss Procedure on page 12-13
.
c.
Check the coupling's sealing surfaces to make sure they are not scratched or damaged.
d.
Re-assemble the coupling using a new o-ring or gasket and following the instructions found
at
Install Parker UltraSeal Compatible Couplings (Standard Fitting) on page 4-24
Cajon VCR Couplings (Optional Fitting) on page 4-25
.
e.
Leak check the coupling again.
•
If the coupling still leaks, contact Brooks Automation Service.
•
If the leak is repaired, return to the previous procedure.
3.
Return to the Check Refrigerant Lines procedure.