TC110 Series
Water Temperature Control Units 882.03888.00
•
09/19/2018
29
Electricals
The pump motor and the immersion heater operate on three-phase 60 cycle nominal
voltages with the control circuit operating at 115V single phase. The control circuit voltage is
provided by a single phase machine tool transformer with a grounded secondary.
The 115V control circuit and controller outputs are fuse protected. The pump motor is
controlled by a full voltage magnetic non-reversing motor starter, with branch circuit
overcurrent and thermal overload protection.
Automatic Vent
This feature automatically triggers the purging of air from the system before you start the
unit. The vent actuates the solenoid valve, and forces trapped air and water out through the
drain, properly filling and priming the unit prior to startup. Complete venting is necessary to
prevent damage to the pump and heater.
The vent process is controlled through a timer. If you have a large process, you may need to
complete the venting process by pressing the VENT button on the front-mounted switch
panel.
Pressure Switch
A pressure switch built into each unit keeps the system from starting until the water supply
is turned On and subjected to the minimum water supply pressure. This feature protects the
pump seal and the heater from damage through attempted operation without water. The
pressure switch is set at approximately 16 psig (110 kPa/1.1 bar) for 250°F (121°C) units
prior to leaving the factory.
4-6
The microprocessor Controller
The controller is an easy-to-operate microprocessor-based PID control device. When the
process reaches the set point, the PID control cycles the cooling valve and/or immersion
heater to maintain the proper leaving water temperature.
The controller has been fully factory tested. Set the desired process temperature set point
and the control does the rest.
Built-in range of operation on the controller is 32°F to 250°F (0°C to 121°C).
