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Key to symbols and safety instructions
Therm 4000 S – 6 720 815 298 (2017/05)
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warnings
The following signal words are defined and can be used in this
document:
• NOTICE indicates that material damage may occur.
• CAUTION indicates that minor to medium personal injury
may occur.
• WARNING indicates that severe or life-threatening
personal injury may occur.
• DANGER indicates that severe to life-threatening personal
injury will occur.
Important information
Additional symbols
1.2 General safety instructions
These installation instructions are
directed to the owner of the device as
well as to approved gas, water and
heating engineers and electricians.
▶ Read and retain the operating
instructions (device, heating
controller, etc.) prior to operation.
▶ Read the installation instructions
(device, heating controller, etc.) prior
to operation.
▶ Observe safety instructions and
warnings.
▶ Observe national and regional
regulations, technical rules and
guidelines.
▶ Keep a record of all work carried out.
If you smell gas
A gas leak could potentially cause an
explosion. Observe the following rules if
you smell gas.
▶ Avoid producing flames or sparks:
– Do not smoke, do not use a lighter
or strike matches.
– Do not operate any electrical
switches or pull out any plugs.
– Do not use the telephone or ring
doorbells.
▶ Turn off the gas supply at the main
shut-off valve or at the gas meter.
▶ Open windows and doors.
▶ Warn your neighbours and leave the
building.
▶ Prevent anyone from entering the
building.
▶ Stay well away from the building: call
the emergency services and the gas
supplier.
Intended use
The device may only be used for DHW
heating for domestic use or for similar
Warnings in the text are indicated by a
warning triangle.
In addition, signal words are used to indicate
the type and seriousness of the ensuing risk
if measures for minimising the danger are
not taken.
Important information where there is no
danger to people or property is indicated
with the adjacent symbol.
Symbol Meaning
▶Step
Cross-reference to another part of the document
• List/list entry
– List/list entry (second level)
Table 1
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