Bth 199 & 250 Wiring Diagram - A.O. Smith BTH-120 Instruction Manual

Bth 199 & 250 wiring diagram
1
13
8
11
1 BLACK
2 WHITE
1
2
3
LOW GAS
PRESSURE SWITCH
2
15
4
14
5
10
6
7
RED
1 RED (ECO)
2 BLACK
3 BLACK
4 RED (ECO)
1 BLACK
2 BLACK
1 GREEN
2 BLUE
3 WHITE/GREEN
7 WHITE/BLUE
8 WHITE/BROWN
1 BLACK
2 WHITE
2 RED
GREEN
WHITE
GREEN
1 BLACK120 VAC HOT
3 WHITE 120 VAC NEUTRAL
4 YEL 24 VAC
4 YEL 24 VAC
TRANSFORMER
INSIDE CCB
50VA
ENCLOSURE
24 VAC
GAS VALVE AIR INTAKE
ENABLE/DISABLE CIRCUIT
JUMPER WIRE BETWEEN PINS
8 AND 11 ON J6 PLUG
HOT SURFACE IGNITER
FLAME SENSOR
UPPER TEMPERATURE PROBE
LOWER TEMPERATURE PROBE
PWM (pulse width modulation)
SPEED INSTRUCTION SIGNAL
WIRES FROM CCB TO BLOWER
MOTOR VFD (variable frequency drive).
120 VAC 1 Ø POWER
BLACK
RED
WHITE
GROUND STRIP
BURNER GROUND
(BURNER BOLT)
figure 67
69
BLOCKED
BLOCKED
EXHAUST
ANODE 1
ANODE 2
NOTE: COMBUSTION BLOWER
ASSEMBLY CONSISTS OF
MOTOR, BLOWER AND INTEGRAL
VFD (variable frequency drive).
1 4 5
1
COMBUSTION
2
BLOWER
GREEN
WHITE
ON/OFF
BLACK
SWITCH
BLOWER
PROVER
GROUND
N
120 VAC NEUTRAL
L
120 VAC HOT