Benchmark Metropolis DGT 25 BF Installation And Servicing Instrucnion page 17

2. 1 9 BOILER ELECTRICAL DIAGRAM
PI
BLU-BLUE
V
MARRONE-BROWN
MARRONE-BROWN
EV1-2
PA
(24 VDC)
OP
2 1
3 4
TA
(24 VDC)
SE
(3,3 VDC)
4 3 2 1
8 7 6 5
KEY
F
TRA
PI
V
EAR
EV1-2
PF
M
SM1/SM2 Heating sensor
FLM
SS
PA
NERO-BLACK
NERO-BLACK
BLU-BLUE
44 44
39 39
CN6
CD.6301420D
CN4
CN5
29 29
38 38 30 30
S.AUX
(3,3 VDC)
SM1 / SM2
(3,3 VDC)
Fuse (1.6 AT)
Ignition transformer
Pump
Fan
Ignition/detection electrode
Gas valve coil
Smoke thermostat
Modulator
D.H.W. flow meter
D.H.W. sensor
Water pressure switch
L
N
45 45 49 49
CN7
F
CN2
CN3
12 12 7
16 16 15 15 11 11
3
1
2
PF
(24 VDC)
TA Room thermostat
SE External sensor (optional)
S.AUX Auxiliary sensor
EXP Expansion card remote control (optional)
OP Mechanical time clock (only for 8107911)
NOTE: Connect TA to the connections 5-6 after
having removed the bridge.
CONNECTOR SPARE PART CODES:
CN4 code 6316254
CN5 code 6316253
CN6 code 6316252
N
230 V
50 Hz
L
EAR
TRA
R59
EXP
(24 VDC)
CN1
6
1
OUT
ROSSO - RED
VERDE - GREEN GND
ARANCIO- ORANGE VCC
VERDE-GREEN
VERDE-GREEN
ROSSO-RED
ROSSO-RED
ENG
IT
ES
FLM
(12 VDC)
M
(17 VDC)
SS
(3,3 VDC)
Fig. 11
17