AEC TCU Series Open Reservoir Water Temperature Control Units - Manual (Page 23)

Page 24 Open Resevoir Water Temperature Control Units
the exit of the process. Connect the PROCESS WATER SUPPLY to your plant water
supply. Connect the PROCESS WATER DRAIN line to an open drain, or to the return line
of your central water system.
Make sure you carefully select the connecting lines and connectors between the
temperature control unit and the process to suit the needs and requirements of your
application.
If your unit has a maximum operating temperature of 180ºF (82ºC), the connecting lines
and connectors should have a service rating of at least 180ºF (82ºC) and 150 psig
(1,034.25 kPa/10.34 bars).
TO PROCESS — 1½” NPT
This is the outlet for the tempered water leading to the process being controlled.
FROM PROCESS — 1½” NPT
Water from the process re-enters the TCU Series system to be tempered and re-circulated
back into the process.
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.
Water Out
Size Depends on Solenoid Used
The cooling water return outlet leading back to the cooling tower, chiller, or drain.
Pressure Relief — ¾”
The pressure relief valve is located inside the cabinetry. This location reduces the chance of
scalding nearby personnel if the relief valve should trip.
3-9 Making System Purge Connections
TCU Series systems equipped with the System Purge option have a compressed air inlet
marked MOLD PURGE. Connect to a clean, dry 100 psig (689.50 kPa/6.90 bars) air line.
Install your own shutoff valve to prevent process liquid from backing up into the plant air
piping if the compressed air is turned off and the check valve fails. Don’t depend on the
solenoid valve to hold water pressure in the temperature control unit.