2 | Safety
14
D-LX 201/721
2.2.1 Hazards due to electric current
DANGER
Danger of death due to electric current!
An immediate danger of death exists in case of contact with live parts. Damage to the
insulation or individual components can present a danger of death.
▶ Only have work on electric systems performed by specialised electricians.
▶ Disconnect the flame monitor, check that no voltage is present and secure against
reactivation before opening the housing.
▶ In the event of damage to the insulation, disconnect the flame monitor and initiate
repairs.
▶ Keep moisture away from live parts. This may lead to a short-circuit.
To avoid hazards:
● Only connect the flame monitor and contact circuit (ready for operation and flame
contact) to permissible supply voltages.
● We recommend that the flame monitor be operated with a protective extra-low
voltage (PELV).
NOTICE
Damage to electronic components due to electrostatic discharge (ESD)
Electronic components are becoming smaller and smaller and more and more
complex. Their susceptibility to damage from electrostatic discharge is increased
accordingly. Therefore:
▶ To protect the components, measures must be undertaken to prevent electrostatic
discharge during all work performed at the open device (ESD protection).
▶ To prevent static charges building up on the human body, service employees can
for example be equipped with a personal earthing system.
2.2.2 Risk of burns due to hot surfaces
The flame monitor (including accessories) is installed directly onto the burner. The
components may become hot during operation. In plants with a low hazard potential
(ambient pressure, low temperatures, no toxic gases, no health risks), installation/re-
moval may take place during plant operation, if this is permitted by the operating com-
pany's applicable regulations.
CAUTION
Risk of burns due to hot surfaces!
Contact with hot components may cause burns. Therefore:
▶ Wear protective work clothing and protective gloves when working near hot com-
ponents.
▶ Before performing any work, make sure that all components have cooled to the
ambient temperature.
2.2.3 Damage due to failure of the purge air
The purge air serves to protect the system fitted onto the boiler. The purge air shields
components from hot and/or aggressive gases and dusts.
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