Viessmann C3HA, Installation And Service Instructions For Contractors

Page: 81 / 192

81
Matching the control unit to the heating system
Note
The control unit must be adjusted subject
to the system equipment level.
See the relevant system version for the
configuration from page 8 onwards.
Call up configuration
1. Press "OK".
The display shows
"Time of day and
date" .
2. Press " Å " for at least 3 s to access the
other control levels.
3. Select "Commissioning" control
level with the rotary selector.
4. Confirm with "OK".
5. Select "Configuration" with the
rotary selector.
6. Confirm with "OK".
7. Turn rotary selector until the required
parameter is indicated.
8. Confirm the selected item with "OK".
The adjustable value flashes.
9. Set the required value/function with
the rotary selector.
10. Confirm the selected item with
"OK".
The value stops flashing and has
therefore been accepted.
See page 107 for a list of all codes
for configuration.
Adjusting the heating curve
The heating curve illustrates the relation-
ship between the outside temperature
and the boiler water or flow tempera-
ture.
To put it simply, the lower the outside
temperature, the higher the boiler water
or flow temperature.
In turn, the room temperature depends
on the boiler water or flow temperature. The level and slope of the heating curve
can be changed (see table below).
Settings in the delivered condition:
■ Slope = 1.4
■ Level = 0
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5618 294 GB
Service