HAMWORTHY HEATING LTD
55
Merley Boiler Sequence Controller
500001210/D
Line no.
Operating line
HC1
760
Room temp limitation
Room temp limitation
With the "Room temperature limitation" function, the heating circuit pump can be
disabled if the room temperature exceeds the current room temperature setpoint by
more than the preset differential.
The heating circuit pump is re
-
enabled when the room temperature returns to a level
below the current room temperature setpoint.
While the "Room temperature limitation" function is active, no demand signals are sent
to the heat source.
Room temperature limitation does not work in the case of pure weather compensation.
OFF
ON
P
°C
TRx
TRw+SDR
2
3
7
1D02
TRw
t
TRx
Actual value room temp
TRw
Room temperature setpoint
SDR
Room switching differential
P
Pump
t
Time
Boost heating
Line no.
Operating line
HC1
770
Boost heating
Boost heating is used to reach the new setpoint more quickly when switching from the
Reduced setpoint to the Comfort setpoint, thus reducing the heat
-
up time. During boost
heating, the room temperature setpoint is raised by the value set here. A higher setting
leads to shorter heat
-
up times, a lower setting to longer heat
-
times.
Boost heating is possible with or without room sensor.
20
15
°C
t
TR
w
TR
x
23
71
D
03
DTRSA
TRw
Room temperature setpoint
TRx
Actual value of the room temperature
DTRSA
Increase of the room temperature setpoint