Viessmann B1HF - Floating Switching Contact Connection

26
Floating switching contact connection
Connection at plug
lH
One of the following functions can be connected:
■
"0" No function or room thermostat
■
"2" DHW circulation pump external demand (push-
button function, pump runs for 5 min). Not for
Vitodens 111-W
■
"4" External demand
■
"5" External blocking or alternatively connection for
external heating circuit hook-up (if no more than one
heating circuit hook-up is configured on commission-
ing. If more than one heating circuit hook-up is
required, connect to EM-EA1 accessory)
A
lH
N
1
L
B
Fig. 16
A
Floating contact
B
Plug
lH
Assigning functions in the commissioning assis-
tant
See commissioning assistant in "Commissioning".
Notes on connecting PlusBus subscribers
As a maximum, the following PlusBus subscribers can
be connected to the control unit (terminal 1):
■
One EM-M1 or EM-MX extension
■
One Vitotrol 200-E
■
One EM-EA1 extension
■
One EM-S1 extension
■
One EM-P1 extension
Note
The number of PlusBus subscribers is limited: Max.
one Vitotrol 200-E plus a maximum of 3 additional
extensions, e.g. EM-M1 or EM-EA1.
Example: 1 x Vitotrol 200-E + 1 x EM-M1 + 1 x EM-
EA1.
If no Vitotrol 200-E is connected, 4 extensions can be
connected.
The max. total length of the PlusBus lead is 50 m.
With an unscreened lead, 2-core, 0.34 mm
2
.
Accessories mains connection, connect plug to
external power supply
Connect one or more extensions via an ON/OFF
switch directly to the mains supply (see next chapter).
Installation sequence
Electrical connections (cont.)
6167586
Installation