On-Site Connections On Hmu Heat Management Unit; Outside Temperature Sensor - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Installation sequence
Electrical connections
P2 230 V parametrisable output:
DHW circulation pump or heating circuit pump for
heating circuit without mixer (in systems with low
loss header)
BCU burner control unit power supply (connected
A
in the delivered condition)
Power supply for accessories
B
Plug located externally on the right or left-hand
C
side of the appliance (see also following diagram)
Connections to extra low voltage (ELV) plugs

Outside temperature sensor

!
Terminals 1 and 2 on external plug
Cylinder temperature sensor (connected in the
%
delivered condition)

On-site connections on HMU heat management unit

Fig. 12
Plug located externally on the right or left-hand
C
side of the appliance (supplied separately)
Required plugs are supplied in separate packaging.
Outside temperature sensor
Fitting location for outside temperature sensor
North or north-westerly wall, 2 to 2.5 m above
■
ground level; in multi storey buildings, in the upper
half of the second floor
■ Not above windows, doors or vents
18
(cont.)
C
!
PlusBus
jF
Terminals 5 and 6 on external plug
CAN bus
lA
Information on connecting accessories
When connecting accessories observe the sep-
arate installation instructions provided with
them.
6 5 4 3 2 1
6 5 4 3 2 1
Provide strain relief for cables in the wiring chamber of
the HMU heat management unit using cable ties.
■ Not immediately below balconies or gutters
■ Never render over
Outside temperature sensor connection
2-core lead, length up to 35 m with a cross-section
2
of 1.5 mm
C
C