Technical data

6 720 611 445 GB (04.05)
26
Individual settings
6 Individual settings
6.1 Mechanical settings
6.1.1 Setting the boiler flow temperature
The central heating flow temperature can be set to
between 50˚C and 88˚C.
Limited maximum setting for low-temperature
operation
The temperature control is factory limited to setting E,
giving a maximum flow temperature of 75˚C.
Adjustment of the heating output to the calculated heat
demand is not required by the heating systems regula-
tions.
Removing the maximum setting limit
For heating systems which require higher flow temper-
atures, the maximum setting limit can be removed.
B Lift off the yellow button on the temperature control
with a screwdriver.
Fig. 34
B Rotate yellow button through 180° and replace (dot
facing inwards).
The boiler flow temperature is no longer limited.
6.2 Settings on the Bosch Heatronic
6.2.1 Operating the Bosch Heatronic
The Bosch Heatronic enables easy setting and check-
ing of a large number of appliance functions.
This description is limited to those functions required
for commissioning.
For a full description of all available functions, please
refer to the Service booklet for the Engineer, order no.
7-181-465-346.
Fig. 35 Appliance controls
1 Service button
2 “Chimney sweep” button
3 Temperature control for boiler flow
4 Function control
5 Display
Selecting service function:
The service functions are subdivided into two levels:
Level 1 comprises service functions up to function 4.9,
Level 2 consists of service functions from 5.0 upwards.
B To select a service function on Level 1: press and
hold the button until the display shows – –.
B To select a service function on Level 2: press and
hold the buttons and simultaneously until the
display shows = =.
B Then turn the temperature control to select the
required function.
The service function 5.0 may be reset.
Control setting boiler flow temperature
1 approx. 50˚C
2 approx. 55˚C
3 approx. 60˚C
4 approx. 65˚C
5 approx. 70˚C
E approx. 75˚C
max approx. 88˚C
Table 11
6 720 611 137-13.1O
i
Note the positions of the temperature con-
trols and . After completing the set-
tings, return the temperature controls to
their original positions.
Service function Code no. See page
Anti-cycle time 2.4 27
Max. boiler flow
temperature 2.5 27
Switching difference 2.6 27
Max. heating output 5.0 27
Table 12
6 720 611 137-14.1O
5
2 1
4
3