Service
5
20
Installation and service instructions RC20 room controller • Issue 08/2006
We reserve the right to make any changes due to technical modifications.
5.5
Heating system
If the RC20 room controller is the sole programming unit in the
system (P1 = 0) or operation takes place using UBA 1.5, this
parameter determines the type of control for the heating system
(only room temperature dependent control is possible).
P2
Setting
Explanation
1
Room flow (factory setting)
Room temperature control that responds
dynamically to deviations between the temperature
setting and the actual room temperature by
changing the
flow temperature
.
Set P2 to 1 if you want changes in heat output
(e.g. due to the opening of thermostatic valves in
rooms
other
than the reference room) to be
compensated for.
2
Room output:
Room temperature control that responds
dynamically to deviations between the temperature
setting and the actual room temperature by
changing the
boiler output
.
Set P2 to 2 if there are no major variations in load
and only the reference room is to be controlled
(e.g. open-plan house). This means that changes
in the heat output due to the opening of
thermostatic radiator valves in rooms
other
than in
the reference room are compensated for only very
slowly.
This room temperature control is somewhat slower
but also leads to fewer burner starts than "room
flow".
USER NOTE
This parameter is not shown if the room controller is installed as
a remote control unit (P1
≠
0). In this case set the type of control
for the heating system on the RC30/RC35. If the outside
temperature dependent control is activated in the RC30/RC35,
this will also apply to the RC20.