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2.3.c Liquid Over-Temperature Protection
The maximum liquid temperature (T
element temperature (T
kW, etc.) and duty cycle (duty %). T
Example 1: Given a maximum allowable liquid temperature of 100°C, a
Example 2: Given a maximum allowable liquid temperature of 100°C, a
2.3.d Internal Over-Temperature Protection
The Trebor IDH 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. See Section 7 for wiring instructions.
2.3.e Liquid Level Sensor Interlock
The Trebor IDH requires a liquid level interlock with a sensor located at
the heater outlet to prevent dry operation. This level sensor is not
supplied and should be controlled by the user.
MODEL IDH OPERATION / MAINTENANCE MANUAL
°C), heater power rating (P - i.e. 3-kW, 4-kW, 6-
e
heater rated at 6 kW and a 100% duty cycle, the maximum
element temperature limit is:
T
= 100°C + (6)*(1.00)*(16.1)
e
T
= 196.6°C (Maximum allowable element temperature)
e
heater rated at 6 kW and a 75% duty cycle, the maximum
element temperature limit is:
T
= 100°C + (6)*(0.75)*(16.1)
e
T
= 172.5°C (Maximum allowable element temperature)
e
°C) can be estimated from the
max
= T
+ P * duty * 16.1
e
max
PAGE 7
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