On-Site Connections On The Hmbu Heat Management Unit; Outside Temperature Sensor; Connecting The Low Loss Header Sensor ); Connecting The Cylinder Temperature Sensor - Viessmann B1HF Installation And Service Instructions Manual

Electrical connections

On-site connections on the HMBU heat management unit

A
Fig. 15
Diaphragm grommets, 230 V cables
A
Diaphragm grommets, extra low voltage (ELV)
B

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
■
Not immediately below balconies or gutters
■
Never render over.
■
Connecting the low loss header sensor
The sensor of the low loss header is connected to the
accessory extension EM-P1 or EM-M1/MX (ADIO elec-
tronics module) respectively.

Connecting the cylinder temperature sensor

Connect the cylinder temperature sensor to
terminals C . See page 24.

Connecting the DHW circulation pump (only type B1HF)

Note
Connect DHW circulation pumps to EM-P1 extension.
Configuration via software tool.
Connect DHW circulation pumps with standalone func-
tions directly to the 230 V
(cont.)
B
)
∼ supply.
Open diaphragm grommets as required. Thread
■
through only one cable at a time without a plug.
Ensure diaphragm grommets are airtight. If required,
remove plug from cable. After threading the cable
through, re-fit the plug to the wire ferrules.
■ For cables without strain relief bushings, provide
strain relief in the wiring chamber in the form of cable
ties.
Outside temperature sensor connection
See page 24
2-core lead, length up to 35 m with a cross-section
of 1.5 mm 2
See installation instructions for extension EM-P1
or EM-M1/MX
Specification
Rated current
Rated voltage
Installation sequence
1 A
230 V ~
25