8
Mr. Heater | Forced Air Propane Construction Heater
Operating Instructions and Owner’s Manual
Part #
Color
Length
From
To
1040
Black
6" (152mm)
I1 (Ignitor)
T.B. Line
1070
Orange
11" (279mm)
1 (Ignitor
Spark Plug
1041
White
4 1/2" (114mm)
I2(Ignitor)
T.B. Return
1044
Yellow
16" (406mm)
High Limit
T.B. Middle
1044
Yellow
16" (406mm)
High Limit
T.B. Line
1441
Black
5" ((127mm)
Relay
T.B. Middle
1442
White
5" (127mm)
Relay
T.B. Return
1806
Orange
6" (152mm)
Relay
Thermocouple Junction Block
1806
Orange
6" (152mm)
Relay
Thermocouple Junction Block
MH55FAV, MH85FAV, MH125FAV
WIRING CHART
WIRING DIAGRAMS
CONNECTION DIAGRAM
MOTOR
IGNITOR
B
SCHEMATIC DIAGRAM
HIGH-LIMIT SWITCH
THERMOCOUPLE
SPARK PLUG
MOTOR
IGNITOR
RELAY
GAS
HIGH-LIMIT SWITCH
SPARK PLUG
THERMOCOUPLE
R* or Y*
R* or Y*
I1
I2
B** or O**
B
B
W
B
RELAY
B
W
B
W
G
LINE CORD
115V
60HZ
VALVE
I1
I2
COLOR CODE
LEGEND
BLACK
BLUE
WHITE
GREEN
L
R
Y
O
RED
YEL
ORG
FEMALE CONN.
RING CONN.
TERMINAL BOARD
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)
NOTE:
