37
NOTE: L-N-E CONNECTION IS ADVISABLE
CONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT IS 230 V.a.c.
B.C.B.
(ACF02X) Burner control board
R.T.
Room thermostat
P.S.
Water pressure switch
D.A.P.S.
Differential analogue pressure switch
H.L.T.
Hight limit thermostat
H.T.
Heat thermistor
MOD
Modulator
S.S.E.
Spark/Sense electrode
OPE
Gas valve solenoids
B.E.B.
Boiler control board
S.B.
Secondary board
JP8.
Natural gas or L.P.G. selector
JP9
Timer on- off selector
JP5
Jumper C.H. only
PT2
Central heating temperature control
PT1(S.B.) Selection of 0-reset / winter - summer
F
Fan
P
Pump
DS1-DS2 Temperature / allarm display
TA1
Combustion test
F1
Fuse 100 mA F (on 24V circuit)
F2
Fuse 2 A F (on 230 V circuit)
RL1
Ignition relay
RL2
Pump relay
ISO1
Fan triac
L1
Led OK (green)
L2
Led alarm (blink red)
TRF1
Transformer
G.V.
Gas valve
C.S.
Condensate sensor
Fig. 44