Strebel S-CB+ Series, Installation Operating & Maintenance Manual

Page: 82 / 125

S-CB
+
Boiler Range Manual
82
11.2.6 0-10 V
DC
R
EMOTE BURNER INPUT CONTROL
The burner input is controlled by connecting an external 0-10 Vdc signal to the boiler (connections 15-16 ).
P5 BB Analogue input config (0=off 1=temperature 2=power) (display D1)
This parameter must be set at "2" so the supplied 0-10V dc signal will control the burner input. The standard factory
setting is “1”, temperature set point control. Possible settings are:
0 =
0-10V control off
1 = 0-10V temperature set point control active
2 = 0-10V burner input control active
See also the following graph for the relation between the burner input and the control signal.
11.2.7 T
IMER CONTACT FUNCTION
This function can be activated when using an external night reduction timer for heating. This timer contact can be
connected to the thermostat terminals (connections 13-14).
P5 AB Timer contact (1=on) (display A9)
When this parameter is activated and
…
-
…the thermostat terminals are bridged (timer contact closed), the normal daytime temperature is used as set
point.
-
…the thermostat terminals are not bridged (timer contact open), the night reduced temperature is used as set
point.
0-10 Vdc control signal
b
urner
i
np
ut
[%]
P2GB off P2GA on P2GC max.
Min. burner input %
fixed value, e.g. 25%
Max. burner input %