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AP18733 REV. 3.2.17
55
CONNECTOR
DESCRIPTION HT SELV
NO. OF LOCATION PIN BOARD SILK
CN7
LWD1140-14
1
F.S Flame Detect Sensor
SELV (5V)
8
2
OP.S Operating Water Temperature Sensor
9
3
DH.S DHW Temperature Sensor
10
4
I.S Inlet Water Temperature Sensor
11
5
BG.S
Exhaust Temperature Sensor
12
6
OT.S
Optional Temperature sensor
13
7
SP.S
Unused
14
CN12
SMW250-07
1
AGM
AGM Stepper Motor Coil / Y Phase
SELV (24V)
2
3
AGM Stepper Motor Coil / X Phase
4
5 GND -
6 AGM Stepper Motor Position SELV (14V)
7 VDD SELV (24V)
CN10
SMW250-08
1
DHM
(Mixing Valve)
DHM Stepper Motor Coil / Y Phase
SELV (14V)
2
3
DHM Stepper Motor Coil / X Phase
4
5 GND
6 DHM Stepper Motor Position
7 Unused
8 VDD
CN14
SMW250-09
1
IWC
(Flow Control
Valve)
GND
2 IWC Stepper Motor Position
3 VDD
4 IWC Stepper Motor Coil X Phase
5 IWC Stepper Motor Coil Y Phase
6 VDD
7 IWC Stepper Motor Coil / X Phase
8
IWC Power IWM Stepper Motor Coil / Y
Phase
9 Unused -
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