Sterlco Micro Series Water Temperature Control Unit - Manual (Page 16)

Page 16 MICRO Series Water Temperature Control Units
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CAUTION
If a non-relieving device such as a regulator, ball valve,
or check valve is installed on the WATER IN line,
you MUST install an expansion tank
of at least ½ gallon (about 2 liters) capacity.
Failure to do so can result in system overpressure from thermal expansion.
Install the tank configured as shown below:
Check the expansion tank frequently to make sure it is not flooded.
Water Out — ¾” NPT
The cooling water return outlet leading back to the cooling tower, chiller, or
drain.
Net supply pressure must be between 25 psig and 75 psig (172.38 kPa/1.72 bars
and 517.13 kPa/ 5.17 bars). Net supply below 15 psig (103.43 kPa/1.03 bars)
may allow water to flash to steam, cavitate the impeller, and damage the pump,
which prevents the unit from cooling properly. Operation above 75 psig (517.13
kPa/5.17 bars) may cause premature opening of the relief valve from pump
pressure and pressure surges.