6 720 610 576 GB (03.02)
32
Maintenance
B Remove sealing plug from combustion air testing
point (234.1, fig. 48).
B Insert testing probe about 80 mm into the testing
point and seal testing point.
Fig. 48
B Measure O
2
and CO
2
levels.
B Refit sealing plug.
B Press and hold button until the display shows – –.
The button will stop flashing and the display
shows the CH flow temperature.
7.2.2 Testing CO and CO
2
B Press and hold the button until the display
shows – –.
“Chimney sweep” mode is now active.
The button will light up and the display shows the
CH flow temperature.
B Remove sealing plug from flue gas testing point
(234, fig. 48).
B Insert testing probe about 135 mm into the testing
point and seal testing point.
B CO- and CO
2
levels.
B Refit sealing plug.
B Press and hold button until the display shows – –.
The button will stop flashing and the display
shows the CH flow temperature.
8 Maintenance
B The User should be recommended to have the appli-
ance serviced regularly by a competent person (see
Maintenance Contract).
B Use only genuine spare parts
B Refer to the Spare Parts List when ordering spare
parts.
B Always renew seals and O-rings removed during
servicing or repair work.
B Use only the following types of grease:
– Water valve: WRc approved silicon based grease
– Unions: approved sealant.
B To drain the appliance shut the system valves and
open the pressure relief valve.
B Upon completion of any electrical work check for
earth continuity, correct polarisation and resistance
to earth.
i
In “chimney sweep” mode, the appliance
switches to max. rated heat output or the
set heating output. You then have 15 min-
utes in which to measure the levels. After
that, the appliance switches back from
“chimney sweep” mode to normal mode.
i
You have 15 minutes in which to measure
the levels. After that, the appliance switch-
es back from “chimney sweep” mode to
normal mode.
6 7 2 0 6 1 0 3 3 2 - 6 5 . 2 R
2 3 4
2 3 4 . 1
B Always disconnect the appliance from
the electrical power supply (fuse, circuit
breaker) before carrying out any work
on the electrical systems or compo-
nents.
B Always turn off the gas cock before car-
rying out any work on components
which carry gas.
i
There is a Service booklet for the Engi-
neer, order no. 7 181 465 346, available
to competent persons.
i
All safety and control systems are moni-
tored by the Bosch Heatronic. In the event
of a component fault, the display shows a
fault code.
To Next Page
Loading...
Need help?
General