Polycold Cryochiller
Installation
Installation and Operation Manual
Install the Refrigerant Lines
Brooks Automation
214072 Revision B
4-21
Route and Install the Refrigerant LInes
1.
Use the following considerations to plan the route of the refrigerant line between the
cryosurface and the top of the refrigeration unit:
•
The refrigerant line should not be a hindrance or hazard to the movement of personnel.
•
The refrigerant line should not hinder access to or maintenance of any equipment.
•
Provide at least 32mm (1-1/4 inches) wall thickness of insulation around the feed and return
lines. If the insulation and system are not completely sealed and airtight, water vapor from the
air will accumulate on some of the surfaces and create ice on the refrigerant lines.
•
Support the line at mid-length and at three-foot intervals
.
Ensure that the line supports do not crush the insulation covering the lines.
Use supports that are at least 100mm (4 inches) wide.
•
Do not use supports that make direct contact with the exposed tubes or couplings.
•
Do not allow the lines to be vibrated by the application.
•
Important.
The feed lines are made of soft
refrigeration copper and have a min-
imum bend radius of 300mm (12
inches).
Feed lines are only suitable to be
bent once to fit the planned layout.
•
Bend the refrigerant line so that the
couplings are even at the point of
connection to the refrigeration unit.
The feed and return lines should
have the same bend radius.
The brand or type of tape, hangers,
clamps, or cradles depends on what
is available and acceptable at the
installation site.
Brooks Automation. Inc. Polycold Systems recommends using a continuous line length from
the refrigerant unit to cryocoil feed-through. Polycold does not recommend or warranty the use
of intermediate fittings.
If your line design has an intermediate set of fittings between the unit and chamber
NOTICE
Refrigerant lines should only be bent once.
Re-bending a refrigerant line can cause “work hardening” and fractures and
refrigerant line failure.
Figure 4-14: Minimum Refrigerant Line Bend Radius
