Phase Monitor - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Power supply
(cont.)
Fit contact shield in front of the mains
terminals and if required, seal the low
tariff connection (see the following
chapter).

Phase monitor

The phase monitor is used to monitor the mains power supply to the compres-
sor.
The following different mains supplies
(if adjustable) are permissible in the
delivered condition:
Over/undervoltage
Phase asymmetry
Switching delay
The phase monitor switches off
(switching contact opens) if these tol-
erances are exceeded.
The phase monitor automatically re-
enables the power supply if the values
fall back to within the specified toler-
ance range.
Remove the cause if the relay has
responded. The relay does not need
to be reset.
15 %
15 %
4 s
Installation sequence
99