Force-Air Propane Construction Heater
Operating Instructions and Owner’s Manual
6
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).
170QFAVT - WIRING CHART
COLOR
LENGTH
FROM
TO
White
7”
Valve
Terminal Block
Black
6”
On/Off Switch
Terminal Block
Red-(Hi-Temp)
16 1/2”
High Limit Switch
Valve
Red-(Hi-Temp)
16 1/2”
High Limit Switch
Terminal Block
Orange
11”
Flame Control
Spark Plug
(Ignition)
Green
7”
Flame
Control
Ground
(Harness)
Red
7”
Flame Control
Terminal Block
(Harness)
White
6”
Flame Control
Terminal Block
(Harness)
Black
6”
Flame Control
Terminal Block
(Harness)
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.
Recommended Minimum Gauge
for Cord Extensions
Wire Gauge Chart A.W.G.
Name
Plate 120V
Cord Length in Feet
Amps.
25 50 100
150
5-6
18 16 14
12
6-8
18 16 12
10
8-12
18 14 12
10
10-12
16 14 10
8
12-14
16 12 10
8
WARNING:
When using a thermostat controlled heater,
its exit area should be protected from personnel and
warnings posted of sudden startup.
Cubic feet
Temperature Rise Required (
o
F)*
of space to
be heated
20
o
30
o
40
o
50
o
5,000
14,000 20,000 27,999 34,000
7,000
19,000 28,000 38,000 47,000
10,000
27,000 40,000 54,000 67,000
15,000
40,000
60,000
80,000 100,000
20,000
54,000
80,000 107,000 133,000
30.000
80,000 120,000 160,000 200,000
50,000 133,000 200,000 266,000 333,000
BTU’S PER HOUR REQUIRED
HIGH-LIMIT SWITCH X2
LINE
VALVE
NEUT
GRD
CHASSIS
GROUND
CHASSIS
GROUND
CHASSIS
GROUND
CHASSIS
GROUND
CHASSIS
GROUND
LINE CORD
THERMOSTAT
MOTOR
GAS
VALVE
FLAME CONTROL
SPARK PLUG
G
W
G
G
B
B
B
B
R
W
W
R
Y
B
Y
G
G
WIRING DIAGRAM
SIZE AND CAPACITY OF PROPANE
CYLINDERS
The charts below show the approximate size of the cylinder
required for these heaters. To use the chart:
1. Select the lowest air temperature expected (at the bottom of
the chart).
2. Move straight up to time of operation desired
(left side of the chart).
3. Read the cylinder size required.
All heaters should have:
full cylinders
good air circulation
no frost on cylinders
Fuel Cyclinder Capacity: 100#
COLOR CODE
B-BLACK
L-BLUE
G-GREEN
O-ORANGE
R-RED
W-WHITE
Y-YELLOW
