lp-672 Rev. 000 Rel. 002 Date 10.3.18
33
Color Designations (15-3.11 of ANSI Y14.15)
Black (BK) Brown (BR) Red (R) Orange (O) Yellow (Y) Green (G) Blue (BL) Purple (P) Gray (GY) White (W)
Water Heater
INSTALL CAPACITY
3
Fan Start Coil
GND
Fan End Coil
DC 14V
RPM Sensor
6
2
5
4
Burner High Limit
DHW Temperature Sensor
OP Water Temperature Sensor
2
9
3
10
GY
GY
Y
Y
5
12
BL
BL
1
8
BK R
M
DC FAN MOTOR
R
BL
Y
W
BK
3
6
2
5
4
Exhaust Temperature Sensor
RPM Meter
6
BL
5
W
4
R
DC 5V
Signal
Ground
5 4
6
DHM Y Phase
DHM /Y Phase
DHM X Phase
DHM /X Phase
GND
DHM Position Sensor
DC 14V
5
4
3
1 2
6 7
M
BL
R BK
W
O
6
5
4
2 3
G
7
BR
1
Step Motor
Y
8
DC 14V
8
Flame sensor
AC 120V Netural
AC 120V Live
Ignitor
10
4
R
R
12
6
P
P
W BK
8 2
Over-Heat Temperature Sensor
7
BL
14
W
Gas Valve
Flow sensor
4
11
BL
BL
Inlet Temperature Sensor
Ground
G
1
Unused (jumper)
9
3
W
W
Internal Pump
M
6
BL
13
W
Return/T24 Temperature Sensor
3
Y
2
BK
1
R
DC 5V
Signal Ground
2 1
3
Air Pressure sensor
Temperature High Limit
External Pump
M
11
5
Y
Y
M
BL
R
BK
W
O
6
5
4
2 3
G
7
BR
1
Step Motor
Y
8
IWM Y Phase
IWM /Y Phase
IWM X Phase
IWM /X Phase
GND
IWM Position Sensor
DC 14V
5
4
3
1 2
6 7
DC 14V
8
BL
BL
3
Solen. Valve
1
CN9
CN6
SW1
MCU_WRITE
RS-485
CN11
CN10
CN14
CN7
CN4
CN3
CN5
CN1
CN8
Condensate APS
(Mixing Valve)
DHM
IWM
(Flow Control Valve)
5
CN12
4 3 2
1
BL
P
G
BK R
5
13
6
14
7
15
8
16
W
W
BK
BK
R
R
BL
BL
4
12
R W
Display Control
10
2
G
R
Water Level Sensor
3
11
R W
T/T
BR
G
1
9
Water Leakage Sensor
1
2
3
5 4
T24 temperature sensor (optional)
GND
INPUT
12VDC / 5VDC
Figure 38 - Electrical Wiring Diagram