Wiring Diagrams - Mr. Heater MH55FAV Operating Instructions And Owner's Manual

WIRING DIAGRAMS

THERMOCOUPLE
RELAY
B
W
W
G
LINE CORD
LEGEND
COLOR CODE
FEMALE CONN.
BLACK RED
R
YEL RING CONN.
L BLUE Y
WHITE O ORG
TERMINAL BOARD
GREEN
WIRING CHART
MH55FAV, MH85FAV, MH125FAV
Part # Color Length
1040 Black 6" (152mm)
1070 Orange 11" (279mm)
1041 White 4 1/2" (114mm)
1044 Yellow 16" (406mm)
1044 Yellow 16" (406mm)
1441 Black 5" ((127mm)
1442 White 5" (127mm)
1806 Orange 6" (152mm)
1806 Orange 6" (152mm)
Mr. Heater | Forced Air Propane Construction Heater
CONNECTION DIAGRAM
SPARK PLUG
MOTOR
B
B** or O**
B
IGNITOR
I1
I2
W
B
HIGH-LIMIT SWITCH
R* or Y*
R* or Y*
B
NOTE:
IF ANY ORIGINAL WIRING AS SUPPLIED WITH THE HEATER MUST BE REPLACED, IT MUS BE REPLACED WITH
TYPE AWG 105° C WIRE OR ITS EQUIVALENT EXCEPT AS INDICATED (*TYPE SF 2-200, **SGI-250°C)
From To
I1 (Ignitor) T.B. Line
1 (Ignitor Spark Plug
I2(Ignitor) T.B. Return
High Limit T.B. Middle
High Limit T.B. Line
Relay T.B. Middle
Relay T.B. Return
Relay Thermocouple Junction Block
Relay Thermocouple Junction Block
SCHEMATIC DIAGRAM
B
I1
MOTOR IGNITOR
I2
115V
60HZ
8
Operating Instructions and Owner's Manual
HIGH-LIMIT SWITCH
THERMOCOUPLE
SPARK PLUG
RELAY
GAS
VALVE