17
1. Apply supply voltage and check that all functions of the respective switchpoints work correctly.
LEDs
1
,
2
,
3
are provided for visual check of switchpoints.
Fig. 5
To check the correct functioning of the LEDs
1
,
2
,
3
remove the housing cover
c
.
Fig. 4, Fig. 5
1. Check the switching function Low level (MIN) alarm of the electrode tips
1
and
2
.
For this test the level in the vessel must fall below the low level mark.
The low level alarm must then be activated by the level switch after the de-energizing delay has
elapsed.
2. Check the switching functions “Pump ON” and “Pump OFF”. See table
“Functions”.
Commissioning Procedure
Danger
1. Make sure that the system NRGS 11-2, NRGS 16-2 is wired in accordance with the wiring diagram.
Fig. 11
2. Make sure that the supply voltage agrees with the specification on the name plate.
The terminal strip of the NRGS 11-2, NRGS 16-2 is live during operation.
This presents the danger of electric shock!
Cut off power supply before mounting or removing the housing cover!
Checking electrical connection
Applying mains voltage
Checking assignation of switching functions
Checking low level (MIN) alarm
The function of the low level alarm can be simulated by pushing the button “TEST”
5
.
Fig. 5
Press button “TEST”. After the de-energizing delay a low level alarm must be raised.
Operation
Resetting low level alarm
The heating will be switched off and interlocked. To reset the interlock the MIN electrode tips must
enter the water again and the button “Reset”
6
must be pushed. Hold down the button “Reset” for at
least 5 seconds.
