AEC TCU Series Open Reservoir Water Temperature Control Units - Manual (Page 29)

Page 30 Open Resevoir Water Temperature Control Units
Low Level Cutout Switch
This level switch shuts down the unit if the water level in the tank drops below the conductive
rod. This shuts down the unit until the high level probe is satisfied.
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 ODP motors and seal flush lines as standard.
The pump is a bronze-fitted 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 helping it facilitate turbulence to maximize heat transfer, and is well suited for the
conditions under which it was designed to operate.
Heaters
The specially designed 9 kW three-phase low watt density electrical immersion heater heats
the water, and the controller regulates the temperature. The standard heater has an incolloy
sheath for best heat transfer and low fouling properties.
Low watt density immersion heaters at 12 kW, 18, and 24 kW are available options for these
models, depending upon the heating needs of the process. All models are built to provide full
or partial heat as required by the process and determined by the controller, providing more
precise temperature control.
Solenoid Valves
If the unit is equipped with a heat exchanger for cooling, the solenoid (½” slow-closing type)
allows the cooling water to pass through the tubes of the heat exchanger.
Water Hammer Arrestor (Shock Stop)
Optional
Shock waves from fast-operating solenoid valves may damage some process systems. For
these applications, a welded metal bellows-type shock stop with a pre-charged and sealed
nitrogen blanket can be installed in the cooling piping.
Pump Starter
TCU Series high quality IEC-rated pump motor starters are industrial grade motor controls
with overload protection and manual reset.