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Siemens Building Technologies Basic Dokumentation RVA63.280, RVA53.280 CE1P2374E
Landis & Staefa Division 19.04.2001
3.9 Protective boiler start-up
.
The required boiler temperature setpoint will be reached quicker.
The condensation range will be passed quicker.
Description
During the boiler's heating up time, undesirable flue gas condensation occurs on the
walls of the combustion chamber. The lower the boiler temperature, the more flue gas
condensation occurs.
Protective boiler startup shortens the boiler's heating up time by restricting the heat
consumers. This means that the boiler passes the critical temperature range quicker,
thus minimizing flue gas condensation.
Setting range Unit Factory setting
0/1 - 1
The settings have the following meaning:
0 Protective boiler start-up is switched off
1 Protective boiler start-up is switched on
Protective boiler start-up is triggered via a locking signal generated by the temperature /
time integral.
Protective boiler start-up leads to switching on / off actions or setpoint reductions of the
heating circuits, depending on the type of heat consumer.
3.9.1 Impact on 2-position loads
Due to the deactivation of the pumps, heat consumption will be reduced. This reduces
considerably the boiler water's heating up time.
• Heating circuit pump:
Status Effect
Locking signal > 0 % Heating circuit pump OFF
Locking signal = 0 % Normal pump operation
• Boiler pump
A response to the locking signals is given only if control of the boiler pump is selected
“depending on temperature demand” (line 12 OEM = 0).
Status Effect
Locking signal > 5 % Boiler pump ON
Locking signal < 5 % Normal pump operation
• D.h.w. pump:
Status Effect
Locking signal > 50 % D.h.w. pump OFF
Locking signal < 50 % Normal pump operation
Benefit
Setting
Effect
Process
Note
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