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NRG 1x-60 - Installation & Operating Manual -
819681-00
System malfunctions
Checking installation and function
When you have remedied system malfunctions, perform a function test as follows.
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Check the low water (LW) switchpoint by letting the water drop below the defined limit. In this case,
the equipment must behave as if there were an alarm.
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Check the switchpoint when bringing into service and every time the NRG 1x-60 level electrode is
replaced.
System malfunctions in the NRG 1x-60 level electrode also trigger a system malfunction in the
URS 60 / URS 61 safety control unit. The output contacts open without a delay and the relevant
signal output is activated.
If you require assistance, please tell us the indicated fault code.
In the event of malfunctions or faults that cannot be remedied with the aid of this Installation &
Operating Manual, please contact our service centre or authorised agent in your country.
Emergency mode for water level limiter systems
If the system works with two NRG 1x-60 level electrodes (water level limiter system), if one electrode
fails, the equipment can continue working with one level electrode in emergency mode, under constant
supervision, in accordance with EN 12952 and EN 12953.
The following settings are required:
1.
Remove the faulty electrode from the CANopen bus system (connect the plug and socket of the
connecting cable together).
2.
Configure the safety control unit in line with the new configuration as described in the Installation &
Operating Manual.
Important notes on emergency mode
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Enter the start of emergency mode in the boiler log.
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The system must be supervised constantly when running in emergency mode!
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Replace the faulty level electrode immediately.
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Enter the end of emergency mode in the boiler log.