Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors page 55

Terminal connections
Central fault message
A
A Vitocom 100
Power supply
Danger
Incorrect core allocation can
result in serious injury and dam-
age to the appliance.
Take care not to interchange
wires "L1" and "N".
(cont.)
Connection QX1 in the control unit. Code
5890 must be shown at "Alarm output
K10" (delivered condition).
This is a 'live' connection.
■ An isolator must be installed in the
power cable to simultaneously isolate
all non-earthed conductors from the
mains with at least 3 mm contact sep-
aration. The integral circuit breaker ful-
fils this function.
■ Max. fuse rating 16 A.
Installation sequence
Vitocom 100 installation instruc-
tions
55