User Manual
Energy-efficient heating using the
RVD26… district heating controller
en
Operating instructions
CE1B2515en 74 319 0728 0 a
08.03.2010
Switch on heating
1. Is the heating system ready for operation? Check the
main power switch.
2. Check both date and time.
3. Press
for automatic mode.
Set date and time
Press Display Press ... to adjust date and time
Prog
Time of day
Prog
Non-
adjustable
Weekday (1 = Monday,
2 = Tuesday, etc.)
Prog
Date (e.g. 02.12 for
December 2)
Prog
Year
Heat while in automatic mode
Automatic mode controls the room temperature as per
the entered heating program.
1. Press
1
2
to select the desired heating circuit 1 or 2
(corresponding LED is lit).
2. Press
(button is lit).
Meaning of information displayed
Bar lit below … Meaning
°
C
Maintain nominal room temperature
(setting knob used for setting)
Maintain reduced room temperature
Display Meaning
Maintain frost protection temperature
ECO
No heating required at this time based
on outside air temperature or the set
heating period
or
Limitation active
BUS
Controller connected to data bus
Solar d.h.w. heating
Heat continuously
Continuous mode maintains a constant temperature set
via the setting knob.
1. Press
1
2
to select the desired heating circuit 1 or 2
(corresponding LED is lit).
2. Press
(button is lit).
3. Use the setting knob to set the desired room
temperature (top=heating circuit 1, bottom=heating
circuit 2).
Unspecified absence
Set the heating circuit or system to protection mode.
Heating is off, but the system is protected against frost.
1. Press
1
2
to select the desired heating circuit 1 or 2
(corresponding LED is lit).
2. Press
(button is lit).
Provide domestic hot water
Set the desired temperatures:
Press Display Press ... to adjust the desired
temperature
Prog
Normal d.h.w.
temperature
Prog
Reduced d.h.w.
temperature
There are two ways to provide d.h.w.:
1. Provide d.h.w. using a scheduler program.
• Press
(button is lit). D.h.w. is provided as
scheduled.
2. Provide domestic hot water immediately.
• Press
for 3 seconds
(button is flashing for 3 seconds for confirmation).
All d.h.w. settings apply to both heating circuits!
D.h.w. is provided via solar panel if your system is set up
accordingly. Symbol
indicates solar d.h.w. heating.
Set room temperatures
1. Press
1
2
to select the desired heating circuit 1 or 2
(corresponding LED is lit).
2. Use the setting knob to set the desired nominal room
temperature. The setting is active:
• In automatic mode during the heating periods
entered in the heating program.
• Always in continuous mode.
3. Use the buttons to set the remaining temperatures as
well as the heating curve:
Press Display Press ... to adjust the desired
temperature
Prog
Non-
adjustable
Display of current
temperature setpoint
Prog
Reduced room
temperature
Prog
Room temperature for
holidays/frost protection
Prog
Heating curve slope
Adjust room temperature (up or down)
Press
1
2
to select the desired heating circuit 1 or 2
(corresponding LED is lit).
Primarily for mild weather:
Use the setting knob to adjust the room temperature.
Primarily for cold weather:
Adjust the heating curve slope on operating line
.
• Room temperature too high:
Reduce slope by ca. 0.05.
• Room temperature too low:
Raise slope by ca. 0.05.
Primarily at night:
Adjust the reduced room temperature on operating
line
.
Wait for two days after each adjustment to allow the
controlled system to adapt!
Continued on back page