S-CB Px 120 Manual
39
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
communica
tion indica-
tor
temp. set point
measured temp.control.sens.
showing the measured temp.
Can be turned off by P5 BJ
When heat is needed for the calorifier the text "HEATING" chang-
es 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
communi-
ca-
tion indica-
tor
temp. set point
Thermostat > coil flow
temp.
Sensor > water temp.
measured temp.control.sens.
showing the measured temp.
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 igniter 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 1 second interval.
Summary of Contents for S-CB Px 120
Page 2: ...S CB Px 120 Manual 2 ...
Page 6: ...S CB Px 120 Manual 6 ...
Page 33: ...S CB Px 120 Manual 33 9 4 Electrical schematics ...
Page 34: ...S CB Px 120 Manual 34 ...
Page 111: ...S CB Px 120 Manual 111 ...
Page 115: ...S CB Px 120 Manual 115 weather dependent control 49 73 ...
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