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CAUTION - READ THIS PRIOR TO FIRING YOUR FURNACE!
Hydro Flame Furnaces are precision built. Please treat them accordingly. All air passages are fixed and cannot be
adjusted. Do not make any physical change in the furnace construction.
Before furnace is put into operation, there are certain steps that must be followed to insure proper operation, efficiency,
long life and safety.
CAUTION:
AN OVERFILLED GAS BOTTLE CAN BE DANGEROUS
Liquid gas from an overfilled bottle can be forced through the gas bottle pressure regulator. Should this happen the
liquid will immediately expand to a vapor creating a high pressure gas. This high pressure gas could destroy the gas
seal in the gas control valve, causing a large amount of gas to escape into your living area. This could, of course, result
in a fire or an explosion. To prevent this, please read and carefully adhere to the following.
All LP.G. gases are put in bottles or cylinders under high pressure as a liquid. The top 10% of the interior area of the
cylinder must be reserved for a gas vapor area, Each cylinder has a small round valve located either beside the main
valve or on the side of that valve. This is called a 10% valve.
When the cylinder is being filled, this valve should be open. It can be opened by hand, DO NOT use pliers or wrenches
to open or close this valve. When the cylinder is being filled, with the 10% valve open, you will hear high velocity gas
escaping, When you see a white, frosty vapor coming out, the cylinder is over filled. Shut main gas valve. Allow gas to
discharge from 10% valve until it becomes invisible. Close the valve and the bottle is properly filled.
LACK OF ALCOHOL IN GAS BOTTLE
When a gas bottle is manufactured, the manufacturer is required by law to subject it to a Pressure Test. To do this, the
bottle is usually filled with water and it is seldom that all of this water is removed. The following often happens when
the furnace is in operation: The gas in a propane cylinder is liquid; as it is drawn off, it becomes a vapor as does a small
amount of the water. Then the gas vapor and water vapor proceed to the small orifice in the pressure regulator at 100
lbs. PSI, pressure or more. Passing through this orifice, the gas pressure is dropped to approximately eleven inches of
water column, or six ounces pressure.
This extreme expansion is the basic principle of refrigeration. Propane is an excellent refrigerant; therefore, the interior
of the regulator will be cooled below freezing temperature and the water vapor will freeze and form tiny ice crystals
around the outlet of the small gas orifice inside the gas pressure regulator. This will cut down on the amount of gas
available to the main burner and rob the amount of gas available to the much smaller pilot orifice. The result is a pilot
flame too small to properly heat the 100% safe thermocouple, which in turn will shut off all of the gas to the furnace,
which is its' proper function. While this is not hazardous, still it can certainly become an exasperating nuisance.
To keep this from happening, simply add 1/2 cup or more of alcohol to each gas bottle. This is done when the bottle is
empty by opening main gas valve on the bottle and pouring it in. This need be done only one time to each bottle.
FUEL LINE CHECKS
We recommend frequent checks on all lines, fittings and pressure regulators. Look for sharp bends or breaks in the
tubing. Check for leaks (use a soap and water solution; do not use matches), have pressure checked at each appliance to
make certain that each has 11” to 12” W.C. or 6 to 6 1/2 ounces of pressure for proper operation on L.P.G. gas.
CAUTION!
Never subject the furnace to more than 8 ounces air or gas pressure when testing fuel lines.
More than this can blow the seal in the gas valve and cause a gas leak.
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Summary of Contents for FA-7920S D
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