6 720 610 576 GB (02.05)
32
Maintenance
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 Always disconnect the appliance from
the electrical power supply (fuse, circuit
breaker) before carrying out any work on
the electrical systems or components.
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.
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