31
Mynute
FUNCTIONAL DIAGRAM 35e
NOTE: L-N-E CONNECTION IS ADVISABLE
Fig. 31
Key
R.T.
Room thermostat (external controls)
P.S.
Water pressure switch
D.A.P.S.Differential analogue pressure switch
H.L.
Hight limit thermostat
H.T.
Heat thermistor
MOD
Modulator
F
Fan
P
Pump
S.S.E.
Sense / ignition electrode
OPE
Gas valve solenoids
B.C.B. Burner control board
B.E.B. Boiler control board
S.B.
Secondary board
JP8
Natural gas or L.P.G. selector
JP9
Timer on- off selector
PT2
Central heating temperature control
PT1(S.B.) Selection of 0-reset / winter - summer
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
IS01
Fan triac
L1
Led OK (green)
L2
Led alarm (blink red)
TRF1
Transformer
G.V.
Gas valve
B.T.
Burner thermostat