Flowserve NRS1-40.1 - Manual (Page 26)

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System Malfunctions
– continued –
Replace c ontrol unit
1. Cut off power supply to the equipment!
2. Remove terminal strips , . For this purpose turn the right and left fixing screws in direction of
the arrow until the terminal strip can be removed.
3. Undo the fixing slide in order to snap out the controller and take it off the supporting rail .
When ordering spare parts please state the serial number indicated on the name plate.
Check installation and performance
Chec k switchpoints
In order to check the switchpoints "Level below low water level (LW)" or "Level above high water level
(HW)" the water level must be lowered or - as the case may be - the boiler must be filled.
The switchpoint "MAX temperature" can also only be checked by increasing the temperature accordingly.
All devices must respond as if there were an alarm.
Check switchpoints after commissiong or replacing the level electrode, temperature sensor or temperature
transmitter.
A B C
G