Viessmann VITOLIGNO 300-P Service Instructions Manual page 136

Designs
Connection and wiring diagram
PCB A1
F1 Fuse, 6.3 A (slow), 250 V
F3 Fuse, 2.0 A (slow), 250 V
X1 Optolink interface
X7 Strapping plug
X10 PCB interface
X13 Boiler coding card
LON Connecting cable for data
exchange between control units
LV plugs
! Outside temperature sensor/
radio clock receiver
?M1 Flow temperature sensor, heat-
ing circuit 1
?M2 Flow temperature sensor, heat-
ing circuit 2
alternative
& Collector temperature sensor in
conjunction with solar thermal
systems
% Cylinder temperature sensor
%Ê Cylinder temperature sensor in
conjunction with solar thermal
systems
Buffer temperature sensor, top
)↑
Buffer temperature sensor, bot-
)↓
tom
PCB A2
F2 Rated heating output 32 to 48 kW:
Fuse, 1.6 A (slow), 250 V
Rated heating output 32 to 48 kW:
Fuse, 2.0 A (slow), 250 V
X4 Plug-in strip, supply system (see
page 137)
X24 PCB interface
136
(cont.)
aVD External hook-up (see page
125)
aVG KM BUS subscriber (e.g. Vitotrol
remote control)
or
KM BUS distributor
230 V~ plugs
sÖM1 Heating circuit pump, heating cir-
cuit 1
sÖM2 Heating circuit pump, heating cir-
cuit 2
alternative
sF Solar circuit pump in conjunction
with solar thermal systems
sA Circulation pump for cylinder
heating (accessory)
sL Boiler circuit pump
sK DHW circulation pump (on site)
fÖ Power supply, 50 Hz
fÖA Power supply, internal
gÖ
Central fault message or soft
start, boiler
gSM1 Mixer motor, heating circuit 1
gSM2 Mixer motor, heating circuit 2
aBJ No function
LV plugs
X2/3 Boiler water temperature
sensor
Flame temperature sensor
X17/aL
X18/a:J Feedback, deslagging drive
X19/a:HS Terminals 1 and 2: Limit
switch, secondary air
damper drive