External Boiler Temperature Control; Protective Boiler Functions - Siemens Synco 700 Basic Documentation

Control action is
too fast
Setpoint compensation
Settings
78/238
Building Technologies
HVAC Products
If the control system's response is too prompt so that significant overshoot or even
permanent oscillations occur, setting parameters Xp, Tn and Tv must be increased in
steps. A new readjustment should be made only after the control action resulting from
the previous readjustment is completed.
TBo
1. Reduce Xp in steps of about 25 % of the previous value.
2. Increase Tv in steps of 2 to 5 seconds.
If this is not sufficient:
3. Increase Tn in steps of 10 to 20 seconds.
6.5.5

External boiler temperature control

The RMH760B delivers a DC 0...10 V signal as the boiler temperature setpoint for an
external boiler temperature controller.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler > Setp compensation boiler
Operating line
Setpoint at 0 Volt
Setpoint at 10 Volt
Limit value
Using setting parameters, the DC 0...10 V output can be matched to the receiver's
input. In the case of setpoints below the limit value, the output indicates DC 0 V.
6.6

Protective boiler functions

Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler > Limitations
Operating line
Boiler temperature max
Boiler temperature min
Optimization min boiler temp
Boiler return temperature min
Bypass pump switching diff
Lock sig maintained boil ret temp
Frost prot (release input off)
Frost prot (release input Off)
Frost prot (release input off)
Protective boiler startup
Protective boiler startup
Delta boiler temp max (stage 2)
Modular Heating Controller RMH760B
6 Boiler temperature control
Range
–150...50 °C
50...500 °C
0...140 °C
Range
25...140 °C
8...140 °C
On / Off
---- / 8...140 °C
1...20 K
None / Uncritical / Critical Critical
0...60 min
On / Off
On / Off
On / Off
Pump on / Pump off
0...10 K
TBoSetpt
t
Factory setting
0 °C
100 °C
10 °C
Factory setting
95 °C
10 °C
On
---- °C
6 K
6 min
On
Off
On
Pump on
1 K
CE1P3133en
05.02.2007