84
Collector excess temperature limit CET
Steam builds up when the system is not circulating. When it automatically switches on
again, the pump does not have the pressure to lift the fluid level above the highest point in
the system (collector feed line). If there is no circulation, the load on the pump is enormous.
This function allows the pump to be blocked above a set collector temperature threshold
(
max ) until a second set threshold (max ) is fallen short of.
ON/OFF Collector sensor Outputs affected
Shut-down
threshold
Switch-on
threshold
ON / OFF Collector excess temperature limit ON/OFF
(ex works
1
= ON, ex works
2
= OFF)
COLL Setting of the collector sensor (S1 to S6) to be monitored.
(ex works
1
= S1, ex works
2
= S2)
Setting range:
S1 to S6
OP Setting of the outputs to be blocked when the switch-off threshold is exceeded.
(ex works
1
= OP1, ex works
2
= OP2)
For programs with pump-valve systems (e.g. program 176+1=177), all the
outputs concerned (e.g. OP 12) must be set, as this function always
relates to the control circuit.
Setting range: combination of all outputs (such as OP1, OP23, OP123)
max Temperature above which the outputs set are to be blocked
(ex works
1
= ex works
2
= 130°C)
Setting range: 0°C to 200°C in increments of 1°C
max Temperature above which the outputs set are to be released.
(ex works
1
= ex works
2
= 110°C)
Setting range: 0°C to 199°C in increments of 1°C
The collector overheating protection function is available twice and is indicated by the index
(1 or 2) in the lower display line.
Function number