Beckett RWF40 Manual - Manual (Page 20)

20/57 CC1B7865en 01.09.2005 HVAC Products
5. Operating modes
In this case, a standard binary signal switches the second stage into circuit with analog
output «X1» on reaching the switch-on threshold «HYS1» and switches it out of circuit at
the lower switch-off threshold «HYS2».
q A
B
q A
(2) (1)
W
HYS2
HYS1
HYS3
X1
0%
100%
7865w04/1099
)
The modulating controller must be available and configured in the unit
(optional).
Ö
Section 8.2 «C112 limit comparator, controller type, setpoint «SP1», locking»
In the event of a sensor failure, the controller cannot monitor the actual value of the
boiler temperature (analog input 1). Safety shutdown will automatically be triggered to
guard against overheating.
This also applies to the acquisition of the external setpoint at analog input 2.
− Burner off
− Floating output for closing the actuating device
− Self-setting is ended
− Manual operation is ended
The setpoint is preselected within preset limits using the buttons, an external analog
signal or the interface.
It is possible to shift the setpoint, either by an analog or binary signal, to influence it
according to the weather, or to change it via an external contact.
5.2.4 2-stage burner, analog output
5.3 Safety shutdown
Functions
5.4 Predefined setpoint