Siemens RVA53.280 - Minimum Limitation of Boiler Temperature (Tkmin)

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Siemens Building Technologies Basic Dokumentation RVA63.280, RVA53.280 CE1P2374E
Landis & Staefa Division 19.04.2001
2.21 Minimum limitation of 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 boiler temperature setpoint (setting on line 01
OEM
)
Tkmax Maximum limitation of boiler temperature setpoint (setting on line 02
OEM
)
The setting ensures that the boiler temperature will not fall below the adjusted minimum
level.
0102030405060708090100120
TV
max
min
akt
°C
2373Z16
56 Actual value of boiler temperature
81 Minimum limitation of boiler temperature setpoint
2
OEM
Maximum limitation of boiler temperature setpoint
1
OEM
Lowest minimum limitation of 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
mi n
ma x
gem
0
Legend
TK boiler temperature
TKw Boiler temperature setpoint
Tkmin Minimum limitation of boiler
temperature
SDK Switching differential
TAgem composite outside
temperature
Benefit
Description
Setting
Effect
Limitation