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Two Channel SMART Level Switch Hi Integ & Low Level 24v
Gestra Two Channel SMART Level Switch Hi Integ & Low-Level 24v
The level switch NRS 1-51 is used in conjunction with level electrodes NRG 1...-.. as a high-level alarm in steam boilers and (pressurized) hot-water plants.
A high-level alarm prevents the water level from exceeding the preset maximum Water level (HW) and switches off e. g. the feedwater supply.
The level switch NRS 1-51 is designed for different electrical conductivities of the boiler water and for connecting one level electrode.
When the water level exceeds the maximum limit, the level electrode enters the liquid and triggers an alarm in the level switch. A switchpoint is determined by the length of the electrode tip.
After the de-energizing delay has elapsed, both output contacts of the level switch will open the control circuit, e. g. for the feedwater supply. If the deactivation of the feedwater supply has become interlocked in the external control circuit, the lockout can only be deactivated when the level electrode is exposed again.
An Alarm also happens if a malfunction occurs in the level electrode and/or the electrical connection.
If installed in a level pot outside the boiler, ensure the connecting lines are cleaned and rinsed regularly. The Level Pot's, Water Level can't be measured for five minutes during rinsing. The level switch, therefore, bypasses the level electrode and monitors the rinsing and bypass time (standby input, controlled by the logic unit SRL 6-50).
If the connecting lines for steam are ≥40mm, and water ≥100mm the installation is considered internal. In this case, the rinsing processes do not require monitoring.
An automatic self-testing routine monitors the safety functions of the level switch. In the event of a malfunction, the control circuit opens instantaneously and switches off e. g. the feedwater supply.
Any Alarm and malfunction messages are indicated by LEDs. The signal outputs are energized instantaneously.
Pressing the Test Button on the unit can be used to simulate an alarm.
Please Note: A high-level alarm prevents the water level from exceeding the preset max. liquid level (HW). It can (for instance) interrupt the feedwater supply. If the interruption of the feedwater supply endangers the heating surfaces in the feedwater preheater (economizer), the heating must be switched off too.
Gestra Two Channel SMART Level Switch Hi Integ & Low-Level 24v
The level switch NRS 1-51 is used in conjunction with level electrodes NRG 1...-.. as a high-level alarm in steam boilers and (pressurized) hot-water plants.
A high-level alarm prevents the water level from exceeding the preset maximum Water level (HW) and switches off e. g. the feedwater supply.
The level switch NRS 1-51 is designed for different electrical conductivities of the boiler water and for connecting one level electrode.
When the water level exceeds the maximum limit, the level electrode enters the liquid and triggers an alarm in the level switch. A switchpoint is determined by the length of the electrode tip.
After the de-energizing delay has elapsed, both output contacts of the level switch will open the control circuit, e. g. for the feedwater supply. If the deactivation of the feedwater supply has become interlocked in the external control circuit, the lockout can only be deactivated when the level electrode is exposed again.
An Alarm also happens if a malfunction occurs in the level electrode and/or the electrical connection.
If installed in a level pot outside the boiler, ensure the connecting lines are cleaned and rinsed regularly. The Level Pot's, Water Level can't be measured for five minutes during rinsing. The level switch, therefore, bypasses the level electrode and monitors the rinsing and bypass time (standby input, controlled by the logic unit SRL 6-50).
If the connecting lines for steam are ≥40mm, and water ≥100mm the installation is considered internal. In this case, the rinsing processes do not require monitoring.
An automatic self-testing routine monitors the safety functions of the level switch. In the event of a malfunction, the control circuit opens instantaneously and switches off e. g. the feedwater supply.
Any Alarm and malfunction messages are indicated by LEDs. The signal outputs are energized instantaneously.
Pressing the Test Button on the unit can be used to simulate an alarm.
Please Note: A high-level alarm prevents the water level from exceeding the preset max. liquid level (HW). It can (for instance) interrupt the feedwater supply. If the interruption of the feedwater supply endangers the heating surfaces in the feedwater preheater (economizer), the heating must be switched off too.
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