23
Installation info
2.3
WIRING DIAGRAM
2.3.1
ACTUAL WIRING DIAGRAM
fig. 19
LEGENDA
A1...A8
=
Connectors
T
A
=
Room thermostat (optional)
V
G
=
Gas valve
RIV/AC
=
Ignition/Ionisation electrode
V
=
Fan (only for TFS)
P
V
=
Fan pressure switch (only for TFS)
T
L
=
H.L. Thermostat
T
F
=
Flue-gas spillage thermostat
P
=
Circulating pump
D
K
=
M
inimum water pressure switch
S
R
=
C.H. sensor
F
L
=
Flow switch
S
S
=
Rotary flow switch (only for CTN-CTFS)
M
V
D
=
Motor 3 way valve (optional for only heating boiler).
M
D
=
Modulating coil
MD – MODULATING COIL
DK – MINIMUM WATER PRESSURE
SR – C.H. TEMPERATURE SENSOR
TA – ROOM THERMOSTAT
TF – FLUE GAS SPILLAGE THERMOSTAT
TL – HIGH LIMIT THERMOSTAT
PV – FAN PRESSURE SWITCH
TL – HIGH LIMIT THERMOSTAT
FL = Flow switch
SS = DHW sensor
MDV – MOTOR 3
WAY VALVEGREEN
V – FAN
MAIN SUPPLY
230V-50HZ
P – PUMP
IONISATION
IGNITION ELECTROD
GAS VALVE
- 1/4 W
