ACS TC 120, Operation And Instruction Manual, Page: 19 / 48

TC 120 682.98767.00 • 10/04/2018
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The unit must have at least 16 psig (110 kPa/1.1 bar) water supply pressure to prevent pump
cavitation that can be caused by the water “flashing” to steam. To avoid damage to the pump
or other components, make sure that maximum supply pressure does not exceed 55 psig (379
kPa/3.8 bar).
Keep restrictions to a minimum by using proper inlet pipe sizing. If the water supply piping is
larger than ¾”, reduce the size at the unit. The table below contains the pipe sizes that are
used in the unit.
Pipe sizes for ¾ hp to 10 hp (0.56 kW to 7.46 kW) units
Location Size in inches NPT
Process delivery 1½”
Process return 1½”
Water supply ¾”
Drain - depends on solenoid used -
Common black pipe is recommended for permanent installations. The temperature control
unit water circuit piping is primarily ferrous (iron) and reacts electro-chemically with non-
ferrous metallic materials such as copper. Some water contains dissolved minerals that
greatly accelerates the reaction between dissimilar metals. Ferrous piping is recommended to
minimize galvanic action. If piping must be copper, use dielectric unions at the unit.
3-5 Piping Considerations for High Mobility Installations
Mobile temperature control systems must use high quality hose rated for at least 150 psig and
250

F (1,030 kPa/10.3 bar and 121ºC). Special 300

F (149ºC) high temperature control
systems must use hosing rated at 150 psig and 300

F (1,030 kPa/10.3 bar and 149ºC) or
greater.

Quick disconnects may be used for mobility, although
they cause a drop in pressure . If
used, they must be sized carefully to minimize pressure drop. Don’t use quick disconnects
with check valves
unless absolutely necessary .
Non-relieving quick connect fittings or check valves on the water supply
must have a pressure relief piped to the drain.
Failure to do so could result in a dangerous over-pressure condition!
3-6 Process Water Considerations
Raw Water
Water treatment is vital in any piping system. In some cases, raw water may be used in the
system without problems; in other cases, it can result in large deposits of scale and corrosion.