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2.5.2
Secondary Service Level
Operation
In order to change or check the values of the service
functions:
B Press buttons
and
symbol = = appears on the display.
The buttons
and
B Turn the temperature control
function number appears on the display.
Once changed or checked the function value:
Values that can be modified:
Description
5.0
Reduced max. heating output
5.1
Continuous ignition (for testing ignition without
gas)
5.5
Increased min. heating and heat store charging
output
5.9
Starting speed option (if flame propagation is
poor, set high starting speed)
6.7
Pump deactivation in HW mode, ZW only.
6.8
Cycle time for heat exchanger constant hot water
function on ZW model.
6.9
Constant hot water
7.3
Venting function
7.7
Temperature-dependent output reduction
8.5
Trap filling programme
Table 5 Secondary Service Level; Values that can be modified
7 181 465 346 GB (03.02)
simultaneously until the
are lighted.
until the desired
Bosch Heatronic board functions
B Press buttons
and
symbol [ ] appears on the display.
The display shows the heating outlet temperature.
B Regulate the temperature control
perature control
on the previously set positions.
To reset all settings on Service Levels 1 and 2 to the
factory setting:
B Power OFF the appliance.
B Press buttons
and
them pressed.
B Switch on appliance, press and hold the
buttons until the display shows r2 followed by [ ].
Display
0 - 99 % and sealed
0 = off
1 = on
0 - 99 %
0 = First start at low speed;
1 = First start at high speed)
0 = off, 1 = on
0 - 60 min
0 - 30 min
0 = off,
1 = On for 8 cycles then
permanently off (i.e. set to 0)
2 = on
0 = off;
1 = Heating on
2 = Hot water on
3 = Heating and hot water on
0 = off
1 = on
simultaneously until the
and the tem-
simultaneously and keep
and
Reset Value
99
0
0
0
1
0
3
1
3
1
11
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