5
Symbols and safety precautions
6 720 617 760 (2008/09)
1.2 Safety precautions
B These instructions must be observed to ensure correct opera-
tion.
B Install and commission the boiler and all accessories in accord-
ance with the associated instructions.
B Allow only qualified installers to install accessories.
B Only use these accessories in conjunction with the heating
appliances listed. Follow the connection diagram!
B Do not connect this accessory to the 230 V mains electricity
supply.
B Before installing these accessories:
Isolate the voltage supply (230 V AC) to the heating appliance
and all additional devices on the bus.
B Do not install this accessory in damp areas.
B Inform customers about the functions of accessories and
instruct them in their operation.
B When there is a risk of frost, leave the boiler switched on and
observe the frost protection information.
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