Maximum Limitation Of The Flow Temperature Setpoint; Frost Protection; Diagnostics - Siemens Synco700 RMK770 Documentation Handbook

Frost protection for the
boiler
Frost protection for the
plant
Frost protection for the
main flow temperature
Frost protection for the
consumer return
temperature
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The main pump, like the boiler pump, never responds to locking signals.
Whether or not the system pump shall respond to locking signals can be selected on
function block "Primary controller".
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Primary controller > Limitations
Operating line
System pump locking signal
6.6.2

Maximum limitation of the flow temperature setpoint

Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Limitations
Operating line
Main flow setpoint max
Using this setting, the flow temperature setpoint, which is calculated by the function
block through generation of the maximum value, can be limited at a maximum.
6.6.3

Frost protection

For more detailed information, refer to subsection 7.9.9 "Frost protection for the boiler".
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Limitations
Operating line
Frost protection for the plant
Here, it can be selected whether frost protection for the plant shall act on the main
pump. For more detailed information about frost protection for the plant, refer to section
5.3 "Frost protection for the plant".
If the temperature at the main flow temperature sensor TMnFl falls below 5 °C, a heat
requisition of 10 °C will be generated. If the temperature at the sensor returns to a level
above 7 °C, the function will be deactivated. The function is active for a minimum of
5 minutes.
If the temperature at the consumer return temperature sensor TRtCo falls below 5 °C, a
heat requisition of 10 °C will be generated. If the temperature at the sensor returns to a
level above 7 °C, the function will be deactivated. The function is active for a minimum
of 5 minutes.
6.7

Diagnostics

The first diagnostic choice is offered by the info pages "Boiler sequence", "Boiler se-
quence manager", "Temperatures" and "Boilers".
Info page "Boiler sequence" shows:
• The number of boilers included in the boiler sequence
• The current lead boiler
• The number of boilers released (release
• Whether the burner operates (Off, first stage, second stage, modulating)
• Whether the boiler is faulty
Boiler Sequence Controller RMK770
6 Boiler sequence management
Range
On / Off
Range
25...140 °C
Range
On / Off
)
Factory setting
Off
Factory setting
95 °C
Factory setting
Off
CE1P3132en
01.03.2005