Refrigerator User Manual

13
VALVE UNIT V/U
For appearance and convenience of installation, the valve unit may be mounted outside
the icebox. In certain applications and multiple plate systems it may be best to mount it
inside. Location of the V/U in multiple plate systems is indicated in the design layout
from our application engineer.
On an externally mounted V/U two 1/2" Swagelok fittings fasten the V/U to tubing
protruding through the icebox wall. Before cutting the tubing:
• Leave a minimum of 1 1/4" of tube beyond the bulkhead.
• Allow room for wrench access.
On any installation:
• The Valve Unit may be mounted in any position.
• 90-degree elbows can be factory installed on the Valve Unit to reduce the space
requirements if necessary.
• The tubing will support the Valve Unit.
• The tubing must bottom in the fitting. For final installation of this unit see the
Swagelok text.
• The V/U will attract moisture. If it is mounted externally to the cabinet be sure it is
accessible for proper insulation installation after the system has been leak
checked and operationally tested.
NOTES ON SWAGELOK FITTINGS
Swagelok fittings come to you completely assembled, finger-tight. (Pieces a, b, and c in
Drawing #1 are already together). They are ready for immediate use.
Disassembly before use can result in dirt and foreign material getting into the fitting and
causing leaks. If disassembly is necessary, reassemble per drawing.
This is a double ferrule system. The most serious installation problem encountered with
SEA FROST is the incorrect assembly of these fittings. Be absolutely sure
that you
assemble all fittings as in Drawing #1.
To ease assembly slacken the fitting nut slightly before assembly. Then tighten with
fingers before tightening with a wrench. (This is to avoid cross threading.)
Step 1. Always leave two inches of straight, undistorted tubing leading to all Swagelok
fittings to allow proper connection.