Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors page 32

Installation sequence
Electrical connections
Buffer temperature sensor connection
Plug : Buffer temperature sensors
)
Fig. 25 Connection for 5 buffer temperature sensors
Plug assign- Function with 5 sensors
ment
)
1 Buffer temperature sensor 1 (top)
2 Buffer temperature sensor 2
3 Buffer temperature sensor 3
4 Buffer temperature sensor 4
5 Buffer temperature sensor 5
6 GND (for all 5 sensors)
Connecting heating circuits, solar circuit, DHW, etc.
Various parts of a heating system can be connected to
the boiler control unit. The associated appliances can
be directly connected to the HKK PCB or to extension
kits (via KM-BUS).
Part of heating system
Heating circuit
Solar circuit
DHW heater
DHW circulation pump
Circulation pump for transferring
heat from the DHW cylinder.
Additional solar function
Flow limiter
Power supply for DHW circulation pump
DHW circulation pumps equipped with their own inter-
nal control unit must be connected via their own sepa-
rate mains connection. Mains connection via the Eco-
tronic control unit or Ecotronic accessories is not per-
missible.
32
(cont.)
Abbreviation
HC
SOL
TWE
ZP
UP
VSB
Additional infor-
mation
Optional
Optional
!
Please note
Incorrect connections may cause malfunctions.
Observe the instructions provided in this chap-
ter.
Max. quantity Connect
4 Sensor, pump, mixer motor
1 Sensors, pump, mixer motor
1 Sensor, pump
1 Pump
1 Pump
1 Valve
Note
For a detailed overview of connection options, see
"Connection options at the HKK PCB and extension
kits via KM-BUS"
Sensor type
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
—