WFC- SC(H) Series
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Installation
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4. Piping
4.1 General
After leveling the chiller-heater and cooling tower, the chilled-hot water piping,
cooling water piping and heat medium piping can be installed. All pipes must be
installed and connected to the machine ensuring that complete access for service is
provided and that all panels, including the top panel, of the chiller-heater can be easily
removed. Failure to observe this vital requirement will lead to severe compromise in
commissioning the machine and in future attempts to service the machine.
Adequately support and brace the piping independently of the chiller-heater to avoid
strain on the piping connections. Do not secure electrical conduit to any part of the
machine. Provide thermometer wells at each inlet and outlet relatively close to the
machine for measurement of water temperatures during commissioning and
maintenance procedures. All piping should be properly aligned and graded to a drain
valve to permit complete drainage of the system. Properly located air vents should be
provided so that the system can be conveniently filled with water.
It is particularly emphasized that access with large pieces of service equipment to the
rear of the machine will be required during the life of the chiller-heater. Accordingly,
it is recommended that the cooling water and chilled-hot water piping to each
machine should be by means of droppers or risers from overhead manifold pipe runs.
Insulation providing a proper vapor barrier is recommended on all pipe work, valves
and pumps transporting the chilled water. If the chiller-heater is installed outdoors,
cladding of the insulation must be provided to combat weathering and the effects of
UV.
Before making final connections to the chiller-heater, the piping must be flushed with
clean water to remove debris. Figure 8 illustrates a typical system design.
