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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 usually 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
100,000
20,000
54,000
30.000
80,000
120,000
50,000
133,000
200,000
WARNING: When using a thermostat controlled 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
Operating Instructions and Owner's Manual
F)*
o
30
40
50
o
o
o
20,000
27,999
34,000
28,000
38,000
47,000
40,000
54,000
67,000
60,000
80,000
80,000
107,000
133,000
160,000
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 HS170NG
WIRING DIAGRAM
B
GAS
VALVE
W
CHASSIS
GROUND
B
MOTOR
B
CHASSIS
GROUND
R
THERMOSTAT
B
LINE CORD
CHASSIS
GROUND
COLOR CODE
B - BLACK
R - RED
L - BLUE
W - WHITE
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).
170FAVT - WIRING CHART
COLOR
LENGTH
White
7"
Black
6"
Red-(Hi-Temp)
16 1/2"
Red-(Hi-Temp)
16 1/2"
Orange
11"
Green
7"
Red
7"
White
6"
Black
6"
6
Force-Air Propane Construction Heater
SPARK PLUG
B
LINE
HIGH-LIMIT
Y
VALVE
Y
NEUT
R
W
GRD
FLAME CONTROL
W
G
CHASSIS
GROUND
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)
G
CHASSIS
GROUND
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