On-Site Connections On The Hmbu Heat Management Unit; Connecting The Outside Temperature Sensor; Connecting The Floating Switching Contact - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Installation sequence
Electrical connections

On-site connections on the HMBU heat management unit

Fig. 13
Plug-in connection on underside of appliance
A
Plug for connecting sensors and PlusBus
B
Remove plug from the pack of installation compo-
nents.
Aperture for cable entry
C
For cables without strain relief bushings, provide strain
relief in the wiring chamber in the form of cable ties.

Connecting the 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 floating switching contact

Connection at plug
lH
26
(cont.)
Outside temperature sensor connection
See page 24
2-core lead, length up to 35 m with a cross-section
of 1.5 mm 2