De Nora Capital Controls 71V3B Series, Instruction Manual

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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 off  

(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  

configure the Evaporator's heat-control system to the particular type of gas being used, the  

flowrate 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 Configuration

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 first 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.