Operation Manual

6 720 645 349 (2010/09)
Key to symbols and safety instructions | 7
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warnings
Keywords at the start of a warning indicate the
type and seriousness of the ensuing risk if
measures to prevent the risk are not taken.
• NOTE indicates that material losses may
occur.
• CAUTION indicates that minor to medium
injury may occur.
• WARNING indicates that severe injury may
occur.
• DANGER indicates a risk to life.
Important information
Additional symbols
1.2 Safety instructions
B These instructions must be observed to
ensure correct operation.
B Install and commission the heating appliance
and all accessories in accordance with the
instructions provided.
B This accessory must only be installed by
suitably qualified installers.
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 Prior to the installation of this accessory:
Isolate the heating appliance and all other
BUS subscribers from the power supply
(220 to 240 V AC).
B For wall mounting: never install this accessory
in wet areas.
B Instruct customers about the functions and
operation of the accessories.
B Risk of scalding during thermal disinfection:
Supervise short periods of operation with
water temperatures over 60 °C or fit a
thermostatic DHW mixer.
B When there is a risk of frost, leave the heating
appliance switched on and follow the frost
protection information.
Warnings in this document are framed
and identified by a warning triangle
printed against a grey background.
If there is a danger due to
electricity, the exclamation mark in
the warning triangle is replaced by a
lightning symbol.
Important information where there is
no risk to people or property is
indicated with the adjacent symbol. It
is bordered by lines above and below
the text.
Symbol Explanation
B Action step
Æ Cross-reference to other parts of this
document or to other documents
• List/list entry
– List/list entry (second level)
Tab. 3