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Building Technologies
Modular Heating Controller RMH760B
CE1P3133en
HVAC Products
9 Heating circuit control
05.02.2007
In preselected room operating mode
, the time switch changes the room operat-
ing mode or the room temperature setpoint in accordance with the program entered.
During holidays, a fixed preselected setpoint is used:
Main menu > Heating circuit 1
(or
2
or
3
)
> Room operating mode
Operating line
Range
Factory setting
Room operating mode holidays
Economy / Protection
Economy
The holiday function is only active in room operating mode
.
9.3.2
User request in the room
The plant user has several choices to override the current 24-hour program and to switch
to some other setpoint. Following can be used to override operation from the room:
•
Switch or button (directly connected)
•
Konnex operator units (e.g. QAW740)
•
Bus operator unit RMZ792
On the QAW740 room unit, the plant user can select the room operating mode via the
mode button (preselection of operating mode) or the timer button.
User interventions can also take place via a 3rd-party device with Konnex interface (S-
Mode). Precondition is that preselection of the room operating mode is set to
.
In room operating mode
, the presence button can be used to change the room
operating mode for the period of time until the next switching point of the time switch is
reached. Changeover takes place between Comfort or Precomfort and Economy.
The timer function is identical with the timer function triggered via a conventional but-
ton. For this reason, the setting used for the duration is also the same. The mode of
operation of this function is described in subsection 9.3.4 “Timer function”.
External switches or buttons for overriding the room operating mode can be connected
to inputs “Room operating mode” and “Timer function”. The mode of operation of these
inputs is described in the 2 following subsections.
They override the other control interventions in accordance with the control priority.
For a description of the control priorities, refer to subsection 9.3.7 “Control priorities in the
heating circuit”.
9.3.3
Room operating mode contact
Using a configurable input, a contact signal for changing the room operating mode can
be acquired. Changeover takes place between the current operating mode and a
selectable fixed operating mode.
The input is to be activated via “Extra configuration“:
Main menu > Commissioning > Extra configuration > Heating circuit 1
(or
2
or
3
)
> Inputs >
Room operating mode
Assign terminal
Main menu > Commissioning > Settings > …
or
Main menu > Settings > Heating circuit 1
(or
2
or
3
)
> Space heating
Operating line
Range
Factory setting
Preselected room optg mode
Comfort / Precomfort /
Economy / Protection
Comfort
Heat limit with Comfort preset
Inactive / Active
Inactive
Time switch
Operating mode
during holidays
Note
Overriding the
24-hour program
Room unit QAW740
3rd-party devices
with Konnex interface
Presence button
Timer function
Conventional switches
and buttons
Extra configuration
Settings