Sterlco Micro Series Water Temperature Control Unit - Manual (Page 14)

Page 14 MICRO Series Water Temperature Control Units
3-4 Piping Considerations for Permanent Installations
We recommend an optional (or customer-installed) strainer on the COOLING
WATER IN inlet.
The unit must have at least 16 psig (110.32 kPa/1.1 bars) 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 40 psig (275.8 kPa/2.8 bars).
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 ½ hp and ¾ hp (0.37 kW and 0.56 kW) units
Location Size in inches NPT
Process delivery ¾”
Process return ¾”
Water supply ¾”
Drain ¾”
Common black pipe is recommended for permanent installations. MICRO Series
water circuit piping is non-ferrous (stainless steel and brass) and reacts electro-
chemically with ferrous metallic materials such as iron. Some water contains
dissolved minerals that greatly accelerates the reaction between dissimilar metals.
Non-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 MICRO Series systems must use high quality hose rated for at least 150
psig and 250
°F (1,034.25 kPa/10.34 bars and 121ºC).
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.
!
CAUTION
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!