IM-P693-06
EMM Issue 1
19
LCS3050 Low Water Level Switch for two probes
6.3 Emergency operation for water level limiter
If the level switch LCS3050 works with two level probes LP40 (water level limiter to EN 12952-07, EN 12953-06),
the installation can continue operating in emergency operation mode according to EN 12952 and EN 12953
under constant supervision with only 1 level probe, in case that one of the two installed level probes fails.
If only one probe is used for operation change the settings as follows:
-
Switch off supply voltage.
-
Unscrew the right and left fixing screws 3 and remove the lower terminal strip 2. See Figure 2.
-
Depending on which probe shall be deactivated, set S1 or S2 of code switches 4 and 5 to ON.
-
Attach lower terminal strip and fasten fixing screws.
-
Apply supply voltage, equipment is re-started.
4
Toggle switch, white
5
Toggle switch, white
Code switch 4
Code switch 5
S1
S2
S1
S2
Level probe 1 activated
OFF
OFF
Level probe 1 deactivated
ON
ON
Level probe 2 activated
OFF
OFF
Level probe 2 deactivated
ON
ON
Important
-
Record the beginning of emergency operation in the boiler log.
-
An installation operating in emergency mode has to be constantly supervised.
-
Immediately replace faulty level probe.
-
Record the end of emergency operation in the boiler log.
-
When the emergency operation is over, restore original settings.
If faults occur that are not listed above or cannot be corrected, please
contact our service centre or authorized agency in your country.