109
Connection and wiring diagram
Connection and wiring diagram
(cont.)
A1
Main PCB
A2
Power supply unit PCB
A3
Supplementary PCB
A4
PCB heating circuit selection
keys
A5
Programming unit
A6
Boiler coding card
A11
Optolink/emissions test
switch PCB
X
Electrical interfaces
F1, F2 Fuse
F6
High limit safety cut−out
E
110
º
C (100
º
C)
F7
Control thermostat
R
75
º
C
(87
º
C, 95
º
C)
K1K7 Relay
S1
Mains ON/OFF switch
8
S2
Test switch
S3
Emissions test switch
S
V1
Fault indicator (red)
V2
ON/OFF indicator (green)
Plug
230V~
sÖ
Heating circuit pump
(accessory)
sA
Cylinder primary pump
(accessory)
sK
DHW circulation pump
(on site)
fÖ
Mains power supply, 50Hz
fA
Oil/gas burner
(connection to DIN4791)
gS
Mixer motor (accessory)
X12
External burner start (stage1)
Low voltage plug
!
Outside temperature sensor
?
Flow temperature sensor
(accessory)
§
Boiler temperature sensor
%
Cylinder temperature sensor
aG
Flue gas temperature sensor
(accessory)
aJ
Return temperature sensor
(accessory)
aVG
KM BUS user
(accessory)
a:A
Two−stage/mod. burner
extension
5862700GB