TC110 Series
Water Temperature Control Units 882.03888.00
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09/19/2018
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If the cooling water supply pressure is insufficient, the low cooling water
pressure cutout switch (set at 16 psig, 10 psig differential [110 kPa/1 bar, 69
kPa/0.7 bar differential]) opens. You need at least 16 psig (110 kPa/1.1 bar)
for the best cooling capacity and to prevent water boiling in the process
circuit at high temperatures, particularly at the pump suction.
After venting, the microprocessor controller monitors the TO PROCESS
probe, cycling open the cooling/vent valve to discharge warm water or
energizing the immersion heater to maintain the process set temperature.
4-5
Identifying Mechanical Controls and Features
To Process Thermocouple
A type K ungrounded thermocouple with a 304SS probe is downstream from the heater to
sense process temperature.
Safety Thermostat
The safety thermostat mounted on the side of the heater tank protects against thermal
runaway. The thermostat guards against the unlikely event of “runaway” heating. If
overheating occurs, the safety thermostat shuts down heater outputs. The unit continues to
pump water through the system to prevent heater damage.
Pressure Relief Valve
If the combined pressure of the cooling supply water and pump discharge exceeds 150 psig
(1034 kPa/10 bar), the pressure relief valve opens and relieves the pressure. This is a non-
adjustable ASME construction valve with a stainless steel spring.
Important!
Route a pipe from the pressure relief valve
to a suitable drain to reduce potential scalding hazard.
The drain line must not have any restrictions or back pressure.
Low Pressure Cutout Switch
This switch, set at 16 psig with a 2 psig differential (110 kPa/ 1.1 bar with a 13.14 kPa/0.14
bar differential) shuts down the unit if the COOLING WATER IN water pressure drops below
16 psig (110 kPa/1.1 bar).
Pumps
Pumps range in power from ¾ hp to 7.5 hp (0.56 kW to 5.6 kW) and are equipped with 3-
phase TEFC or ODP motors and seal flush lines as standard.
The pump is a close-coupled centrifugal type. It features a split case design to facilitate
replacement of the seal. It has a high output capacity with excellent discharge pressure
