Viessmann Vitocal 300-G Installation And Service Instructions Manual page 47

Power supply
(cont.)
Mains power supply in conjunction with on-site power consumption
Without power-OFF
A
F
G
kWh
L
M
N
Fig. 37
Heat pump
A
Additional consumers (of power generated on site)
B
in the household
Electricity meter
C
Inverter
D
Isolator for the PV system
E
Terminal
F
Double-tariff meter (for special tariff for heat pump)
G
Not permissible in conjunction with PV systems for
on-site power consumption
Smart Grid
The Smart Grid functions are switched via the two
PSU floating contacts.
B
A
C
F
N E1E2 D /D
F
L1 L1 L2 L2 L3 L3
H
kWh
L
N
~ ~
=
D
E
F
K
kWh
M
Bi-directional meter (for PV systems to consume
H
power on site):
Energy taken from power supply utility and energy
fed into power supply utility
Meter with reverse block:
K
For energy generated by PV system
Isolator for the domestic power supply connection
L
(distribution panel)
Distribution panel
M
Domestic distribution box
N
Connection options for the two floating contacts:
To EA1 extension as shown in Fig. 38
■
To the heat pump control unit as shown in Fig. 39
■
Installation sequence
47