Bosch ZWB28-3A SERIES Operating Instructions Manual page 9

Explanation of symbols and safety instructions | 9
HInspection and maintenance
The operator is responsible for safety and
environmental compliance of the heating system.
Sign a maintenance and inspection contract with a
trained and certified contractor, covering an annual
inspection and demand-dependent maintenance.
This guarantees high efficiency and environmentally
sound combustion.
HExplosive and easily combustible materials
Never use or store easily combustible materials
(paper, thinners, paints, etc.) near the appliance.
HCombustion air / room air
To prevent corrosion, keep the supply of
combustion air / room air free of corrosive substances
(e.g. halogenated hydrocarbons that contain chlorine
or fluorine compounds).
HOverheating of the appliance
Should overheating occur or the gas supply fail to shut
off, do not turn off or disconnect the electrical supply
to the pump. Instead, shut off the gas supply at a
location outside of the appliance.
6720872363 (2017/04) Greenstar combi 100 p / 151 p