Siemens Albatros2 AVS37 User Manual download pdf (Page 99)

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Siemens Schweiz AG User Manual CE1U2354en

HVAC Products Boiler 23. August 2007

In normal operation, minimum limitation of the boiler temperature is the lower limit value

of the controlled boiler temperature setpoint, depending on the boiler’s operating mode.

In normal operation, maximum limitation of the boiler temperature is the upper limit

value of the controlled boiler temperature setpoint and, at the same time, setpoint of the

electronic limit thermostat (TR).

The setting range of setpoint minimum and setpoint maximum is limited by the setpoint

of manual operation.

Example when using boiler operating mode “Automatic“:

20 10 0 -10 -20

SDK

2371Z26

°C

mi n

ma x

gem

Legend

TK Boiler temp

TKw Boiler temperature setpoint

...TKmax Maximum limitation of the

boiler temperature

Tkmin Minimum limitation of the

boiler temperature

SDK Switching diff

TAgem Composite outside

temperature

Minimum limitation of the return temperature

Line no. Operating line

2270 Return setpoint min

If the boiler return temperature falls below the return temperature setpoint, maintained

boiler return temperature becomes active.

Maintained boiler return temperature allows consumers to be influenced, control of a

bypass pump or use of a return temperature controller.

Output data

Line no. Operating line

2330 Output nominal

2331 Output of basic stage

These settings are required in the case of cascaded boilers with different outputs.

Return setpoint min

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 179 180

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Siemens Albatros2 AVS37 User Manual Page 99