AEC Econo-Cool Chillers - Manual (Page 22)

AEC Water Temperature Control Units Page 21
3-8 Making Cooling Water Connections
WATER IN — ¾”
The cooling water supply inlet from a cooling tower, a chiller, or a city water supply.
!
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:
Royal Series
unit
Expansion
tank
Non-relieving
device
Check the expansion tank frequently to make sure it is not flooded.