Protection Against Boiler Overtemperatures; Pump Kick And Valve Kick; Frost Protection (Release Input Off); Frost Protection For Plant With Boiler Pump - Siemens Synco 700 Basic Documentation

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Building Technologies
HVAC Products
TBoMin
Burner
swich-on
command
Optimization of minimum boiler
temperature On
6.6.4

Protection against boiler overtemperatures

To protect the boiler against overtemperatures on burner shutdown because, possibly,
none of the heat consumers draws heat, a consumer overrun time can be set.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler > Limitations
Operating line
Consumer overrun time
After the burner has shut down, the overrun time ensures that the heating circuits and
DHW heating will still draw heat for that period of time, provided they were consuming
heat up to one minute before the burner was shut down. In any case, pumps and
mixing valves have an overrun time of 60 seconds. For more detailed information, refer
to section 5.4 "Pump overrun and mixing valve overrun".
The overrun time also applies to boiler pumps and shutoff valves (including mixing
valves for the maintained boiler return temperature).
6.6.5

Pump kick and valve kick

The pump kick is a protective function which is performed periodically. It prevents
pumps and / or valves from seizing after longer off periods. For more detailed informa-
tion, refer to section 5.5 "Pump kick and valve kick".
6.6.6

Frost protection (release input Off)

If an external release input is switched to "Off", it can be determined here whether or
not the frost protection function shall be active:
Entry Effect
On Frost protection active
Off Frost protection inactive
6.6.7

Frost protection for plant with boiler pump

Set whether plant frost protection acts on boiler pump. For details on plant frost protec-
tion, see Section 5.3 "Frost protection for the plant".
6.6.8

Protective boiler startup

To protect the boiler against condensation, a minimum boiler temperature is usually
preset. This ensures that, in normal operation, the boiler temperature will not fall below
a minimum level.
Modular Heating Controller RMH760B
6 Boiler temperature control
TBoMin
Burner
swich-on
command
Optimization of minimum boiler tem-
perature Off
Range
0...60 min
Factory setting
6 min
CE1P3133en
05.02.2007