Trebor IQ Chemical Heater - Manual (Page 8)

PAGE 8 MODEL IQ CHEMICAL HEATER OPERATION / MAINTENANCE MANUAL
T
e
= 236.6°C (Maximum allowable element temperature)
Example 2: Given a maximum allowable liquid temperature of 140°C, a
heater rated at 6 kW and a 75% duty cycle, the maximum
element temperature limit is:
T
e
= 140°C + (6)*(0.75)*(16.1)
T
e
= 212.5°C (Maximum allowable element temperature)
2.3.d Internal Over-Temperature Protection
The Trebor IQ chemical heater is supplied with a temperature sensor(s)
located near the top of the quartz substrate. The control system must
limit the quartz substrate temperature interlock sensor to a maximum
temperature of 200°C. Note, two types of sensors are available
–
thermocouple and RTD. See Section 7 for wiring instructions.
2.3.e Liquid Level Sensor Interlock
The Trebor IQ chemical heater requires a liquid level interlock with a
sensor located at the heater outlet to prevent dry operation, see Figure
2-2 for example. See Section 7 for wiring instructions
for Trebor’s
optional liquid level sensor.
Figure 2-2