I
NSTALLATION
G
AS
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FIRED
AIR
HEATER
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2.9
Connecting the unit to the mains supply
2.9.1 Special points regarding the mains supply
Warning:
w
The unit must be earthed.
Warning:
w
The unit must be connected in accordance
with the applicable local requirements.
Caution:
c
For emergency situations and maintenance, it must
be possible to render the entire system electrically
dead.
Every unit has an isolation switch in order to render
the unit electrically dead in the event of emergency
situations and for maintenance.
Warning:
w
Also, do be sure to switch off the mains supply
if you are going to conduct maintenance on,
or make repairs to, electrical components.
2.9.2 Accessing the service compartment
About the service compartment
The service compartment contains, among other things:
• the burner
• the burner fan
• the control electronics and display
• electronic connections
• connections for the mains supply and the thermostat
