Siemens LMV51 Series Basic Documentation page 131

Temperature limiter
function
Menu level 1 Menu level 2
Params & Display
LoadController
Or
SystemConfig
Boiler setpoints
W1 and W2
Menu level 1 Menu level 2
Params & Display
LoadController
Or
Operation
BoilerSetpoint
2-position controller
(C = ON / OFF)
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HVAC Products
The integrated temperature limiter observes a separate temperature limit.
(for details ® «Integrated temperature limiter function»).
After the switch-off point in °C for the temperature limiter has been entered, the relative
switch-on point in % will be given.
Example: TW_Threshold_Off:
TW_SwiDiff_On
Temperature limitation on at
Menu level 3
TempLimiter
TempLimiter
2 boiler setpoints can be adjusted which, however, may not lie above the current limit
value of the temperature limiter function ( ® «Setpoints»).
Changeover from setpoint W1 to setpoint W2 is accomplished by means of an external,
potentialfree contact at input 3.
Menu level 3
ControllerParam
Setpoint W1
Setpoint W2
Example: Modulating control
After the boiler setpoint in °C has been entered, the switch-on and switch-off point of the
2-position controller in % will be given.
The switching points will be calculated in relation to the current setpoint.
Example: Setpoint:
SD_ModOn
SD_ModOff
Controller loop open (Off)
Controller loop closed (On)
Basic Documentation LMV51...
7 Commissioning instructions for the LMV51... system
80 °C
-10 % ( = 8 K)
72 °C
Menu level 4 Menu level 5
TL_Thresh_Off
TL_SD_On
TL_Thresh_Off
TL_SD_On
Menu level 4 Menu level 5
Setpoint W1
Setpoint W2
70 °C
+5 % ( = 3.5 K)
+10 % ( = 7 K)
70 + 3.5 = 73.5 °C
70 - 7 = 63 °C
Menu level 6
Menu level 6
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CC1P7550en
29.05.2002