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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
5.5 Minimum limitation of the burner running time
•
Reduction of burner switching frequencies
Defines the minimum burner running time (burner cycling protection).
Setting range
Unit
Factory setting
0...10 min 4
Once switched on, burner stage 1 will remain activated for at least the period of time
set here.
As soon as the burner is switched on, the minimum burner running time starts, making
certain that the burner will not be switched off before the set minimum time has
elapsed.
If the boiler temperature exceeds the setpoint by the amount of the switching differen-
tial, the minimum burner running time will be ignored or reset.
BR Burner
FZ Release
counter
SDK
Switching differential of the boiler
tBRmin
Minimum burner running time
TKw
Boiler temperature setpoint
TKx
Actual value of the boiler temperature
Benefit
Description
Setting
Effect
Minimum burner running
time
Restriction
0
1
0
50
40
30
1
TK
t
4
12
16
20
0
60
°C
TK
tBRmin
min
TKw+SDK/2
x
23
71
D04
TKw
TKw-SDK/2
8
TKw+SDK
FZ
BR