Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 65

Power supply
(cont.)
Mains power supply in conjunction with self-consumption
Without power-OFF
Vitocal
A
F
G
kWh
L
M
N
Fig. 56
Heat pump
A
Additional consumers (of self-generated power) in
B
the household
Energy meter
C
Inverter
D
Isolator for the photovoltaic system
E
Terminal
F
Double-tariff meter (for special tariff for heat
G
pumps)
Not permissible in conjunction with photovoltaic
systems for self-consumption
Closing the indoor unit
Danger
The absence of system component earthing can
lead to serious injury from electrical current and
component damage in the event of an electrical
fault.
■ Before closing the indoor unit, restore all pro-
tective conductor connections.
Check whether equipment and pipe connec-
■
tions are connected to the equipotential bond-
ing of the building. Restore the connections if
required.
B
Vitocal
A
C
F
N E1E2 D /D
F
L1 L1 L2 L2 L3 L3
H
kWh
L
N
~ ~
=
D
E
F
K
kWh
M
Bidirectional meter (for photovoltaic systems suita-
H
ble for self-consumption):
Energy drawn from power supply utility and energy
exported to power supply utility
Meter with reversing block:
K
For energy generated by the photovoltaic system
Isolator for domestic power supply connection (dis-
L
tribution panel)
Distribution panel
M
Domestic distribution box
N
!
Please note
If a casing door is not securely closed this can
lead to damage from condensation, vibrations
and excessive noise.
■ Check all-round seal of front panel for dam-
age.
Close appliance correctly.
■
On pipe and hose outlets, ensure the thermal
■
insulation is seated correctly.
Installation sequence
65