Strebel S-CB Px 120, Installation Operating & Maintenance Manual

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S-CB Px 120 Manual 42
10.5. Service function
The following graphs describe how to use the service function.
Operating screen:
H E A T I N G : S T A N D - B Y
> > > : 1 2 3 . 4 ° C ( 1 2 3 . 4 ° C )
Press [SERVICE] and hold for 3 seconds.
The burner will start and show the display below.
Operating screen:
H E A T I N G : S e r v i c e 2 6 %
> > > 9 0 . 0 ° C ( 6 0 . 0 ° C )
"HEATING": It is a boiler for heating.
"Service": It is operating in service mode.
"26%": The burner is firing at 26%.
"90,0
o
C": Max. allowable water temp. during service.
"60,0
o
C": Actual measured water temp. (when P5BJ active).
Press [SERVICE] to exit. The unit will go to the operating screen.
Press 3 s. [ON/OFF] to exit. The unit will be switched off.
By using the [ ▲ ] & [ ▼ ] buttons the burner firing rate percentage can
be changed.
Press [MENU] to access the main menu.
Press [MENU] to return to the service menu.
Use [
◄ ] & [ ► ] buttons to browse through the monitor screens.
Press [MENU] to go to the operation menu of the service mode.
Press [SERVICE] to exit the service mode.
The unit will return to the standard operation display.
Maximum RPM table:
Strebel Px 120 RPM
Max. set point* 6500
Max. actual** 6095
Margin on actual ± 175
* The maximum rpm used by the controller as set point.
** The maximum rpm that the fan is actually able to run.
The maximum actual rpm may be lower than the maximum rpm set point. The fan may not be able to reach the
maximum rpm set point, because of the unit’s resistance, which is still correct according to its design. The relation
between the maximum rpm set point and the maximum actual rpm is given in this table. This table applies also to
the service and “Schornsteinfeger” function of the boiler.