De Nora Capital Controls 71V3B Series Instruction Manual
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Contents
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- 11 - 115.6031.01.3.2.6 Water Temperature ControlThe water bath temperature is measured using a T-Type thermocouple connected to aprogrammable electronic temperature controller. The controller regulates the watertemperature 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 exceededThe temperature controller is supplied pre-programmed from the factory to provide the typeof 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.WARNINGModifying any of the factory-programmed operating functions from their factory pre-set settingsmay result in improper and/or unsafe operation of the Vaporizer.Some programmed values, however must be changed as part of the start-up procedure toconfigure the Evaporator's heat-control system to the particular type of gas being used, theflowrate of the gas and the unit's ambient temperature conditions.This Instruction Bulletin provides fundamental operating information for the temperature controllerfor it's use on the Vaporizer. More detailed information is provided in a document suppliedseparately with this equipment. For proper operation of the controller and familiarity with thecontrols in the event of loss of the factory-programmed functions, refer to the LOVE 16C ControllerInstruction Manual included with this equipment.1.3.2.7 Controller Pre-Programmed ConfigurationThe 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 suitthe site and process conditions.1.3.2.8 Water High Temperature SwitchAn auxiliary water high temperature switch, actuated by the temperature controller's HighTemperature 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 theuser) in the event the water temperature rises above the controller's preset limit. Alternatively, theswitch contacts may also be wired into the power supply circuit to the electric immersion heatercontactor to automatically de-energize the heater in the vent of an abnormal over-temperaturecondition. |
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