HTP RT-180 - Page 33

33
LP-505 REV. 4.29.14
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
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
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
GND
2
IWM Stepper Motor Position
3
VDD
4
IWM Stepper Motor Coil X Phase
5
IWM Stepper Motor Coil Y 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
Table 19 – Water Heater Wiring 2