Viessmann Vitocal 300-G Installation And Service Instructions Manual page 101

Power supply
(cont.)
H Economy tariff meter
K TNC system feed
Phase monitor (if installed)
The phase monitor is used to monitor the
mains power supply to the compressor.
The following different mains supplies (if
adjustable) are permissible in the deliv-
ered condition:
Over/undervoltage
Phase asymmetry
Switching delay
Version 1
10
20
<>U
A
%
2
10
Asy
15
B
%
5
6
4
12
t
C
0.1
12
11
14
L3
L2
L1
A2
A1
L Compressor, heat pump stage 2
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.
15 % Remove the cause if the relay has
15 % responded. The relay does not need to
4 s be reset.
A Over/undervoltage in %
H
<>U B Phase asymmetry in %
C Switching delay in s
G
Asy
D Contact used in safety chain (N/O)
F
Ph
E ON/OFF indicator ("Rel")
E
Rel
F Fault display phase failure/phase
G Fault display asymmetry ("Asy")
H Fault display over/undervoltage
LEDs explained
D
■ LED "Rel" illuminates green:
D
All voltages and the rotating field
(clockwise) are healthy.
■ LED "Ph" illuminates red:
The relay has responded; the rotating
field is anticlockwise.
■ All LED's off:
One or several phases have dropped
out.
■ LED "<>U" illuminates red:
Incorrect voltage on one/several
phase(s).
■ LED "Asy" illuminates red:
Asymmetry on one/several phase(s).
Installation sequence
(type BWS 301.A)
sequence ("Ph")
("<>U")
101