Use and Care Manual

Table 20 – Water Heater Wiring 2
49
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
ST.S Unused
13
7
SP.S Unused
14
CN12
SMW250-07
1
AGM
AGM Stepper Motor Coil / Y Phase
SELV (24V)
2
3
AWGM 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
IWM (Flow Control
Valve)
GND
2 IWM Stepper Motor Position
3 VDD
4 IWM Stepper Motor Coil X Phase
5 IWM Stepper Motor Coil X Phase
6 VDD
7 IWM Stepper Motor Coil / X Phase
8 IWM Power IWM Stepper Motor Coil / Y Phase
9 Unused -
CN3
SMW250-06
1
WPS
Unused -
2
3
4
FLUX1
VCC
SELV (5V)
5 Water Flow Sensor
6 GND
CN5
SMW250-10
1
RPM
Fan RPM Check
2 GND