De Nora Capital Controls 71V3B Series - Water Temperature Control; Controller Pre-Programmed Configuration; Water High Temperature Switch

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1.3.2.6 Water Temperature Control
The water bath temperature is measured using a T-Type thermocouple connected to a
programmable electronic temperature controller. The controller regulates the water
temperature and provides the following functions:
• Control of the temperatures at which the heater turns on and o
(with programmable hysteresis)
• Display of the desired “set-value” temperature (SV)
• Display of the actual “process value” temperature (PV)
• Activates alarm relays when limits are exceeded
The temperature controller is supplied pre-programmed from the factory to provide the type
of control strategy required for safe and proper operation of the Vaporizer.
NOTE: The Vaporizer has been furnished with a LOVE brand controller.
Refer to Section 3.6 for the appropriate controller instructions.
WARNING
Modifying any of the factory-programmed operating functions from their factory pre-set settings
may result in improper and/or unsafe operation of the Vaporizer.
Some programmed values, however must be changed as part of the start-up procedure to
congure the Evaporator's heat-control system to the particular type of gas being used, the
owrate of the gas and the unit's ambient temperature conditions.
This Instruction Bulletin provides fundamental operating information for the temperature controller
for it's use on the Vaporizer. More detailed information is provided in a document supplied
separately with this equipment. For proper operation of the controller and familiarity with the
controls in the event of loss of the factory-programmed functions, refer to the LOVE 16C Controller
Instruction Manual included with this equipment.
1.3.2.7 Controller Pre-Programmed Conguration
The controller is factory-programmed prior to shipment with the following parameters:
• Setpoint value set to 155°F
• High Alarm set to 170°F
• Low Alarm set to 140°F
• Fahrenheit temperature units
• Lower setpoint limit set to 35°F
• Upper setpoint limit set to 205°F or 210°F (depending on type of service)
The rst three must be reset as part of the start-up procedure. The last three may be reset to suit
the site and process conditions.
1.3.2.8 Water High Temperature Switch
An auxiliary water high temperature switch, actuated by the temperature controller's High
Temperature Alarm output, is provided to allow remote indication of the alarm condition if desired.
This switch provides a contact opening when the controller's High Temperature Alarm is reached.
The switch may be used to actuate a remote visual and/or audible alarm device (supplied by the
user) in the event the water temperature rises above the controller's preset limit. Alternatively, the
switch contacts may also be wired into the power supply circuit to the electric immersion heater
contactor to automatically de-energize the heater in the vent of an abnormal over-temperature
condition.