nvent 910 Series Installation, Operating And Maintenance Instructions page 35

IMPORTANT:
• This alarm should normally be enabled and the setpoint should be appropriate for the
heating application. Maintaining a minimum 5°C differential between low temperature
alarming and the CONTROL SETPOINT temperature will minimize nuisance alarming due to
momentary dips in temperature. Another alternative to this is to configure the controller for
non-latching temperature alarms.
• This alarm must be enabled and its setpoint must be below the CONTROL SETPOINT
temperature if fail safe mode uses the temperature reading from TS 1.
5.4.3 HIGH TEMPERATURE SENSOR 1 ALARM
Purpose: If enabled, the HIGH TS 1 ALARM allows for alarming of high temperature conditions
as sensed by the first temperature sensor (TS 1).
Alarm Mask: ENABLE or DISABLE
Range: –76°F to 1058°F (–60°C to 570°C)
Procedure: Adjust the HIGH TS 1 ALARM temperature setpoint to the desired value. Note that
the HIGH TS 1 ALARM must be enabled in order to adjust the HIGH TS 1 ALARM temperature
setpoint unless the TS 1 high limit cutout feature is enabled.
IMPORTANT: This alarm should only be used for applications where a product that is sensitive
to over temperature is involved. General usage may result in nuisance alarms due to the flow
of hot product or steam out. This may be a case where the alarm should be enabled and non-
latching temperature alarming should be used. A high temperature condition resulting from a
forced on failure of the heating circuit should first be alarmed by the SWITCH FAILURE ALARM.
See Section 5.5.18 for more information.
5.4.4 TEMPERATURE SENSOR 2 FAILURE ALARM
Purpose: Enabling TS 2 FAILURE will provide indication of an open or shorted failure of TS 2.
Alarm Mask: ENABLE or DISABLE
Procedure: Enable or disable alarming of a failed temperature sensor connected to the TS 2
input as required.
IMPORTANT:
• If no second sensor is installed, this alarm should be disabled. This failure alarm should be
enabled if a second temperature sensor is connected to the TS 2 input.
• This alarm is always latched and must be reset by the user.
5.4.5 LOW TEMPERATURE SENSOR 2 ALARM
Purpose: If enabled, the LOW TS 2 ALARM allows for alarming of low temperature conditions
as sensed by the second temperature sensor (TS 2).
Alarm Mask: ENABLE or DISABLE
Range: –76°F to 1058°F (–60°C to 570°C)
Procedure: Adjust LOW TS 2 ALARM temperature setpoint to the desired value. Note that the
LOW TS 2 ALARM must be enabled in order to adjust the LOW TS 2 ALARM
temperature setpoint.
IMPORTANT:
• If no second sensor is installed this alarm should be disabled. This alarm should be
enabled and the setpoint should be appropriate for the heating application. Maintaining a
minimum 5°C differential between low temperature alarming and the CONTROL SETPOINT
temperature will minimize nuisance alarming due to momentary dips in temperature.
Another alternative to this is to configure the controller for non-latching temperature alarms.
• This alarm must be enabled and its setpoint must be below the CONTROL SETPOINT
temperature if fail safe mode uses the temperature from TS 2.
5.4.6 HIGH TEMPERATURE SENSOR 2 ALARM
Purpose: If enabled, the HIGH TS 2 ALARM allows for alarming of high temperature conditions
as sensed by the second temperature sensor (TS 2).
Alarm Mask: ENABLE or DISABLE
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