Siemens AVS75.39 Series User Manual page 105

Auto source seq
exclusion
Leading source
Minimum limitation of
the boiler temperature
Protective start-up
Siemens
Building Technologies
Setting of the source sequence exclusion is only used in connection with the
activated source sequence (3540).
With source sequence exclusion, the first and / or the last boiler can be exempted
from automatic changeover.
None
The order of switching on the heat sources changes when the number of hours set
is reached (3540).
First
The first heat source in the addressing scheme always remains the lead heat
source. With the other boilers, the switching on sequence changes when the set
number of operating hours have elapsed (line 3540).
Last
The last heat source in the addressing scheme always remains the last. The other
generators change when the set number of hours are reached (line 3540).
First and last
The first heat source in the addressing scheme always remains the lead heat
source. The last heat source in the addressing scheme always remains the last.
The heat sources in between change when the set number of hours is reached
(3540).
The leading heat source is only selected in connection with the fixed order of the
heat source sequence (3540).
The heat source defined as the lead heat source is always the first to be switched
on and the last to be switched off. The other heat sources are switched on and off
in the order of their device addresses.
Line no. Operating line
3550 Prot startup cascade pump
The protective start-up of the cascade pump accelerates boost heating below the
boiler minimum temperature of the first boiler in the cascade by keeping the
cascade pump switched off.
User manual RVS43.345
The settings in detail
105 / 239
CE1U2354en_021
2013-09-02