Siemens RVA47.320 - Page 130

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the OEM settings 15.07.2002
Additional boilers are switched on as late as possible and switched off again as late as
possible. Hence, the aim is to obtain the smallest possible number of switching on /
off cycles for the boilers.
2379Z05
ON
ON
53%
53%53%
80%
40%
40%
80%
80%
80% 80% 80%
100%
100% 100%
20%
20%
20%
20%
20%
P
OFF
30% 30%
OFF
40%
80% 80% 80%
Additional boilers are switched on as early as possible and switched off as late as
possible. Hence, the aim is to have the highest possible number of boilers in
operation, or to obtain long running times for additional boilers.
2379Z05a
ON
ON
OFF
OFF
20%
20%
20%
30% 30%
20%
20%
40%
40%
20% 20%
30% 30%
20% 20%20%
27%
27% 27%
100%
100% 100%
P
27% 27% 27%
= increase in output
= Switching on
= decrease in output = Switching off
P = Output
Strategy 2:
Example of three boilers
w
ith an output range of 20
- 80 %:
Strategy 3:
Example of three boilers
w
ith an output range of 20
- 80 %: