Siemens RVA53.242 - 4.28 Minimum limitation of the boiler temperature (TKmin)

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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
4.28 Minimum limitation of the boiler temperature
(TKmin)
Prevents the boiler temperature from falling below a certain level.
Minimum limitation of the boiler temperature setpoint is a protective function for the
boiler. In addition, minimum limitation of the setting range can be provided with setting
01
OEM
.
Setting range Unit Factory setting
TKmin OEM...TKmax °C 40
TKmin OEM Minimum limitation of the boiler temperature setpoint (setting on line 01
OEM
)
Tkmax Maximum limitation of the boiler temperature setpoint (setting on line 02
OEM
)
The setting ensures that the boiler temperature will not fall below the adjusted minimum
level.
0 10 20 30 40 50 60 70 80 90 100 120
TV
max
min
akt
°C
2373Z16
56 Actual value of the boiler temperature
81 Minimum limitation of the boiler temperature setpoint
2
OEM
Maximum limitation of the boiler temperature setpoint
1
OEM
Lowest minimum limitation of the boiler temperature setpoint
If the boiler temperature setpoint reaches the limit value and the demand for heat
continues to drop, the boiler temperature will be maintained at the adjusted minimum
level.
20 10 0 -10 -20
40
30
60
50
80
70
TK
TK
TK
TK
SDK
2371Z26
TA
°C
°C
w
min
max
gem
0
Legend
TK Boiler temperature
TKw Boiler temperature setpoint
Tkmin Minimum limitation of the
boiler temperature
SDK Switching differential
TAgem Composite outside
temperature
Benefit
Description
Setting
Effect
Limitation