3.5. Wiring diagrams
Model BTN E
Model BTFS E
M: TERMINAL BOARD FOR CONNECTION TO POWER MAINS, EXTERNAL TEMPERATU-
RE PROBE, ROOM THERMOSTAT
M6: TELEMETRY CONNECTION
M1- M24: AVAILABLE CONNECTORS
TA: ROOM THERMOSTAT
SE: 10k Ohm B = 3977 EXTERNAL TEMPERATURE PROBE (OPTIONAL EQUIPMENT)
CT: PHONE CONNECTION DEVICE (OPTIONAL EQUIPMENT)
FUSE: 2AF 250 VAC FUSE
P4: CH CURVE SELECTION POTENTIOMETER
P3: BOILER OPERATING MODE SELECTOR
P2: DHW TEMPERATURE ADJUSTING POTENTIOMETER
P1: CH TEMPERATURE ADJUSTING POTENTIOMETER
IG: TWO-POLED MAIN POWER SWITCH
BC: FLAME DETECTION PCB
VG: GAS VALVE
E. RIV: FLAME DETECTION ELECTRODE
E. ACC: IGNITION ELECTRODE
PSB: RESET BUTTON
TS: SAFETY THERMOSTAT
TF: FLUE GAS THERMOSTAT
DK: LOW WATER PRESSURE SAFETY SWITCH
FL: FLOW METER
PR: RECIRCULATION PUMP
PS: DHW PUMP
EV: TWO-WAY WATER TANK INTERCEPTING VALVE
MVD: THREE-WAY MOTORIZED VALVE
TIMER: TIMER
SB: 10k Ohm B = 3435 WATER TANK PROBE
SR: 10k Ohm B = 3435 CH PROBE
SS: 10k Ohm B = 3435 DHW PROBE
pic. 9
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