Operating instructions
Force-Air Propane Construction Heater Operating Instructions and Owner’s Manual
E-5
OPERATING INSTRUCTIONS
PREPARING FOR OPERATION
1.  Check the heater for possible shipping damage. If any is 
found, immediately notify the factory.
2.  Follow all of the “Precautions”. 
3.  Connect the POL fitting of hose and regulator assembly 
to the propane cylinder by rotating the POL nut 
counterclockwise into the propane cylinder’s valve outlet and 
securely tighten with a wrench.
4.  Connect the hose to the heater by rotating the hose fitting 
clockwise.
5.  Securely tighten all gas connections.
6.  Open the cylinder’s gas valve and check all gas connections 
with a soap and water solution. DO NOT USE A FLAME.
7.  Connect power cord to well-grounded 115V, 60 Hz, 1Ø source 
of power.
8.  When using an extension cord, make certain that it is a 
3-wire (grounded) cord of proper wire size.
170FAVT (WITH THERMOSTAT)
START 
1.  Slowly open the main valve at propane cylinder to 
prevent excess ow check valve from closing.
2.  Set thermostat to full on. Heater will ignite 
automatically.
3.  Adjust ball valve on control panel to desired burn rate.
4.  Set thermostat to desired temperature. Heater will turn 
off and on automatically as the temperature varies in 
the heater area.
STOP
1.  Securely close valve on the propane cylinder.
2.  Continue to operate heater until all fuel in the hose has 
burned.
3.  Turn the heater thermostat to “off”. For extended shut 
down or in areas where the temperature is below 0°F, 
unplug the heater.
170FAV (WITHOUT THERMOSTAT)
START
1.  Before heater ignition, always allow heater fan (blower) 
to run for 20 seconds to purge fuel.
2.  Slowly open the main valve at propane cylinder.
3.  Depress the fuel valve button to light the heater.
4.  After the heater lights, keep the gas valve button 
depressed for 15 seconds then release and the heater 
will continue to operate.
5.  Adjust burn rate by setting control knob to desired level.
6.  Igniter continues to re as long as power cord is plugged 
in.
  a) Igniter sparks continually.
7.  No thermostat usable with these units.
STOP
1.  Securely close valve on the propane cylinder.
2.  Continue to operate heater until all fuel in the hose has 
burned.
3.  Unplug the power cord.
RESTART AFTER SAFETY SHUTDOWN
1.  Securely close valve at propane cylinder. Unplug heater.
2.  Wait 5 minutes.
3.  Restart following “Start” procedure.
MAINTENANCE AND STORAGE
1.  The heater should be inspected before each use, and at least 
annually by a qualified person.
2.  Before each use, check the soft “O” ring seat at the bullnose 
of the POL tting. If the “O” ring is cut, scuffed, or otherwise 
damaged, replace it with part number 6681.
3.  Turn off the gas at the LP-gas supply cylinder(s) when the 
heater is not in use.
4.  When the heater is to be stored indoors, the connection 
between the LP-gas supply cylinder(s) and the heater must 
be disconnected and the cylinder(s) removed from the heater 
and stored out of doors and in accordance with Chapter 5 of 
the standard for Storage and Handling of Liquefied Petroleum 
Gases ANSI/NFPA 58 and CSA B149.1, Natural Gas and 
Propane Installation Code.
SERVICING
A hazardous condition may result if a heater is used that has 
been modified or is not functioning properly. 
When the heater is working properly:
  •  The ame is contained within the heater.
  •  The ame is essentially blue with perhaps some  
  yellow tipping.
  •  There is no strong disagreeable odor, eye burning or 
  other physical discomfort.
  •  There is no smoke or soot internal or external to the 
  heater.
  •  There are no unplanned or unexplained shut downs  
  of the heater.
The parts lists and wiring diagram show the heater as it was 
constructed. Do not use a heater which is different from 
that shown. In this regard, use only the hose, regulator and 
cylinder connection tting (called a POL tting) supplied 
with the heater. IMPORTANT Match the color stripe on the 
hangtag attached to the hose assembly with the color on the 
label located near the propane inlet fitting on the heater. Do 
not use alternates. For this heater, the regulator must be set 
as shown in “specications”. If there is any uncertainty about 
the regulator setting, have it checked.
A heater which is not working right must be repaired, but 
only by a trained, experienced service person.
In-warranty products will be repaired with no charge for 
either parts or labor. Please include a brief statement 
indicating date, place of purchase, the nature of the problem 
and proof of purchase.
Out-of-warrranty products will be repaired with a charge for 
parts and labor.










