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

Page: 46 / 125

S-CB
+
Boiler Range Manual
46
10.3 Display during operation
During normal operation the text in the display shows the status of the boiler. In the following graphs the several
displays during normal operation are explained.
Display at HEATING DEMAND
Heat demand type: Actual status:
H E A T I N G : N o d e m a n d
> > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
cascade com-
munication
indicator
temp. set point
control sensor showing the
measured temperature.
Can be turned off by P5 BJ
When heat is needed for the calorifier the text "HEATING" changes
into "HOTWATR".
When there is no heat demand it always shows heating.
Display at HOT WATER DEMAND
Heat demand type: Actual status:
H O T W A T R : N o d e m a n d
> > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
cascade
communication
indicator
temp. set point
Thermostat > coil flow
temp.
Sensor > water temp.
control sensor showing the
measured temperature
Can be turned off by P5 BJ
Explanation "Actual status" screen
Actual status:
B o i l e r o f f
When boiler is switched off (only text in the display during this status).
N o d e m a n d
No heat demand signal coming from the room thermostat and calorifier sensor (open).
S t a n d - b y
Room thermostat & calorifier sensor/thermostat detect heat demand but set point is
reached.
P r e - p u r g e
The fan is purging before a burner start attempt.
P r e - i g n i t i o n
Ignition starts before opening of the gas valve.
I g n i t i o n
The ignitor is igniting.
P o s t - p u r g e
The fan is purging after burner is switched off.
B u r n i n g 1 0 0 %
When the burner is firing, also the actual rpm% is shown.
Explanation "Cascade communication indicator"
NO CASCADE COMMUNICATION
> > > no.1
Always showing the fixed ">>>"
CORRECT CASCADE COMMUNICATION
> > no.1
no.2
>
Showing alternating no.1 & no.2 with one second interval.