Wiring Diagram - Mr. Heater MH170FAVT Operating Instructions And Owner's Manual

HOW MUCH HEAT DO I REQUIRE?
For economy, it is important to match input to that
required. But heat requirements often vary. For
example, it usually takes a lot more heat to get things
warm than it does to keep them that way. Likewise,
outside air temperature ususally changes during the day
so you may need more heat at night than you do in the
daytime. An approximation of the heat required can be
found by using the chart below.
BTU'S PER HOUR REQUIRED
Cubic feet Temperature Rise Required (
of space to
be heated 20 o
5,000 14,000
7,000 19,000
10,000 27,000
15,000 40,000
20,000 54,000
30.000 80,000
50,000 133,000
WARNING: When using a thermostat controled heater, its
exit area should be protected from personnel and warnings
posted of sudden startup.
Recommended Minimum Gauge
for Cord Extensions
Wire Gauge Chart A.W.G.
Name
Plate 120V
Amps. 25
5-6 18
6-8 18
8-12 18
10-12 16
12-14 16
Mr. Heater | Forced-Air Propane Construction Heater
o F)*
30 o 40 o 50 o
20,000 27,999 34,000
28,000 38,000 47,000
40,000 54,000 67,000
60,000 80,000 100,000
80,000 107,000 133,000
120,000 160,000 200,000
200,000 266,000 333,000
Cord Length in Feet
50 100 150
16 14 12
16 12 10
14 12 10
14 10 8
12 10 8
Model-MH170FAVT

WIRING DIAGRAM

COLOR CODE
B BLACK R RED
W WHITE
L BLUE
G GREEN
O ORANGE
If any original wiring as supplied by the heater must be
replaced, it must be replaced with type AWG 105° C
wire or its equivalent except as indicated
(*type SF2-200, **SGI 250° C).
MH170FAVT - WIRING CHART
PART
NO. COLOR LENGTH
1100 White 7"
1040 Black 6"
1226 Red-(Hi-Temp) 16 1/2"
1226 Red-(Hi-Temp) 16 1/2"
1070 Orange 11"
1959 Green 7"
1959 Red 7"
1959 White 6"
1959 Black 6"
6
Operating Instructions and Owner's Manual
LEGEND
TERMINAL BOARD
Y TERMINAL
MALE CONN
FEMALE CONN
FROM TO
Valve Terminal Block
On/Off Switch Terminal Block
High Limit Switch Valve
High Limit Switch Terminal Block
Flame Control Spark Plug
(Ignition)
Flame Control Ground
(Harness)
Flame Control Terminal Block
(Harness)
Flame Control Terminal Block
(Harness)
Flame Control Terminal Block
(Harness)