Power Supply - Viessmann EM-EA1 Installation And Service Instructions For Contractors

Connecting the PlusBus to the heat generator control unit
A
jF jF [{] DI1 DI2 DI3 [{] [{]
1 2 3 4 5 6
1 2 3 4
Fig. 8
Extension
A
PlusBus to heat generator
B

Power supply

Power supply at the heat generator control unit
L L
N N
? ?
N L
156
Fig. 9
Extension
A
Power supply
fÖ
A Power supply for further accessories
fÖ
Plug for power supply to accessories in the heat
aBH
generator control unit
Separate power supply
If the power supply for the extension is not made at
the heat generator control unit.
6
B
Note
If making the connection to the heat generator with an
external plug for the bus connection, disconnect plug
and connect the wires directly.
jF
Heat generator installation and service instruc-
tions
Create the power supply connection.
Route the power cable to the heat generator control
unit and connect to plug
If power is supplied to a further accessory, use plug
A provided
fÖ
Heat generator installation and service instruc-
tions
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Take care not to interchange wires "L1" and "N".
Danger
Incorrect electrical installations can lead to seri-
ous injury from electrical current and result in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
IEC 60364-4-41
■
VDE regulations
■
■ Technical connection requirements (TAB)
specified by the local grid operator
.
aBH