42
NRG 26-61 - Installation & Operating Manual -
819874-00
Bringing into service
Notes for setting the “AL.Lo” and “AL.Hi” alarm limits
These settings only apply to the limit value for the safety shutoff by the URS 60 / URS 61
safety control unit.
They do not affect the limit signal contacts of the NRR 2-60 or NRR 2-61 level controller.
Please also see the information in the relevant Installation & Operating Manual.
Always set the alarm limits with the plant at its operating point.
If the alarm limits were previously set with a cold plant, you must repeat them at the operating
point.
Setting the “AL.Lo” (low-level alarm = LW) limit
Pay attention to the setting instructions on page 39 and proceed as follows:
1.
Select the parameter “
AL.Lo
”.
2.
Bring the boiler water to the desired low water level.
3.
Save your setting by pressing the rotary knob for approx. 1 second.
Checking the set “AL.Lo” limit or switchpoint
Check the switchpoint by allowing the level to drop below the set “
AL.Lo
” limit. In this case,
the equipment must behave as if there were an alarm.
Always check the switchpoint when bringing into service, after changing a limit, and each time
the NRG 26-61 level electrode is changed, and do this at the plant’s operating point.
Setting the “AL.Hi” (high-level alarm = HW) limit
Pay attention to the setting instructions on page 39 and proceed as follows:
1.
Select the parameter “
AL.Hi
”.
2.
Bring the boiler water to the desired high water level.
3.
Save your setting by pressing the rotary knob for approx. 1 second.
Checking the set “AL.Hi” limit or switchpoint
Check the switchpoint by allowing the level to rise above the set “
AL.Hi
” limit. In this case, the
equipment must behave as if there were an alarm.
Always check the switchpoint when bringing into service, after changing a limit, and each time
the NRG 26-61 level electrode is changed, and do this at the plant’s operating point.
