Viessmann Vitoligno 300-H Installation And Service Instructions For Contractors page 148

Connection and wiring diagram
PCB HKK 2.01
(cont.)
Rated relay output breaking capacity at 230 V
Assignment
Pump outputs , ,
dYÖ dXÖ
Valve outputs dYA , dXA , dCA
Observe full rated breaking capacity:
Max. 4 A ∼
Note
The slot assignment on this PCB may differ subject to
the system version.
System-specific slot assignment:
PCB KSK 2.03
M M
Fig. 92
Outside temperature sensor
!
Flow temperature sensor
? *6
) Buffer temperature sensors
*6 Flue gas temperature sensor
aG
Return temperature sensor
aJ *6
*6 Boiler circuit pump
sL
B Speed, boiler circuit pump
sL *6
kS A *6 Limit switch, heat exchanger cleaning (option)
Jumper fitted
lJ *6
lK *6 Jumper fitted
Internally prewired
*6
148
∼
dCÖ
Rated breaking capacity
∼
4 A
∼
1 A
"System examples"
Power supply for DHW circulation pump
Connect DHW circulation pumps with standalone func-
tions directly to the 230 V
Mains connection via the Viessmann control unit or
Viessmann control unit accessories is not permissible.
A Speed feedback, flue gas fan
a-Ö *6
a-Ö B *6 Default speed, flue gas fan
Programming unit ribbon cable
aYÖ *6
aYA *6 Not allocated
*6 Not allocated
aYS
KM-BUS
aVG
a:K *6 Lambda probe
Primary air damper stepper motor
s-D *6
A
s-D *6 Primary air damper stepper motor
Secondary air damper stepper motor
s-F *6
∼ supply.