Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 32

Installation sequence
Electrical connections
Inserting cables into the control unit enclosure and
applying strain relief
!
Please note
Unsealed apertures in the control unit enclosure
can damage the system.
Blank off unnecessary apertures in the control
unit enclosure with unopened cable grommets.
Preparing cables without integral cable grommet
1.
2.
Fig. 23
1. Cut required openings in the cable grommets.
2. Route cables through cable grommets and secure
with cable ties.
Note
Strip as little of the insulation as possible, close
■
to the terminals.
■ If 2 components are connected to the same ter-
minal, press both cores together in a single wire
ferrule.
Overview of electrical connections
Part of heating system
Actuators, sensors and switches.
Connections for fuel supply system to
ZPK PCB of the control unit
Outside temperature sensor
Buffer temperature sensors
Heating circuits, solar circuit, DHW etc.
Electrical connections on the PCBs
32
(cont.)
Chapter
Overview of electrical connections
Overview of electrical connections
Overview of electrical connections
Connection options at the HKK PCB and extension kits via
KM-BUS
Overview of the PCBs
Applying strain relief
2.
1.
Fig. 24
1. Insert cables with cable grommet into the apertures
in the control unit enclosure.
2. Secure cables with cable ties.
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