Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 113

Power supply
(cont.)
K TNC system feed
L Heat pump compressor stage 2
(type BWS)
Phase monitor
The phase monitor is factory-fitted in the
type BW and is available as an acces-
sory for type BWS.
The phase monitor is used to monitor the
mains power supply to the compressor.
The following power supply devia-
tions are permitted in the delivered
condition:
Over/undervoltage
Phase asymmetry
Switching delay
The phase monitor switches off (switch-
ing contact opens) if these tolerances
are exceeded.
The phase monitor automatically re-ena-
bles the power supply if the values return
to within the specified tolerance range.
Remove the cause if the relay has
responded. The relay does not need to
be reset.
15%
15%
4 s
Installation sequence
113