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9
Installation and Application Information
COLD WATER PIPES
!
CAUTION
!
To prevent damage to the evaporator and possible failure of
the chiller, a supply filter is required in the inlet water piping
that connects to this evaporator. This filter must be installed
prior to operation of the chilled liquid pumps.
Field-installed water piping for the chiller should include:
• A cleanable filter installed at the water inlet to the evaporator
to remove debris and impurities before they reach the
evaporator. Install the cleanable filter within 1,500 mm tubing
length from the evaporator inlet connection and downstream
of any solder connections (no solder connections between
the filter and evaporator).
• A water flow switch should be installed in the horizontal
piping of the supply water line (evaporator outlet) to prevent
evaporator freezing under low or no flow conditions. The flow
switch can be ordered as a factory installed option, as a field
installed kit, or can be supplied and installed in the field. See
page 10 for more information.
Figure 6. Tuberías típicas de un evaporador de placas
soldadas, serie CLIV.
• Piping for units with brazed plate evaporators must have
a drain and vent connection at the bottom of the bottom
connection piping and at the top of the top connection piping,
respectively, see Figure 6.
• These evaporators do not have drain or vent connections due
to their construction. Purge air from the water system prior to
unit start-up to provide adequate flow through the evaporator.
• A suitable pipe support, separate from the unit, to eliminate
weight and stress on fittings and connections.
• An expansion tank and regulating valve to maintain water
pressure.
• Suitable mechanical connections. All evaporators have.
• OGS type grooved water connections (adhering to AWWA
C606) optionally with flanges. PVC piping should not be used.
!
WARNING
!
Polyolester oil, commonly known as POE oil, is a synthetic
oil used in many refrigeration systems and is present in this
Comfort Flex product. POE oil, if it ever comes in contact
with PVC/CPVC, will coat the inside wall of the PVC/CPVC
pipe causing environmental stress fractures. Although there
is no PVC/CPVC pipe in this product, keep this in mind when
selecting piping materials for your application as system
failure and property damage could occur. Consult the pipe
manufacturer’s recommendations to determine suitable pipe
applications.
NOTE:
Welded pipe connections between the strainer and evaporator are not allowed due to the possibility of slag entering
the evaporator.
