Page 2
USSC
CHIMNEY INSTALLATION
Your new furnace must be installed into a
"Class A" Chimney
only.
This type of chimney consists of a flue lined brick chimney,
or an approved "Class A" all fuel factory built (prefabricated)
type. Any other installation guarantees an immediate fire haz-
ard.
Do not install the furnace into the same chimney serving other
appliances.
When using 8" flue pipe, the chimney should have an 8" to 10"
round flue liner or 9"x9" square liner.
The chimney should have a minimum height of 3' from the top of
the chimney to the point at which it passes through the roof.
The top of the chimney must be at least 2' higher than the peak
or the highest portion of the roof within 10' horizontally.
A chimney that rises within the house is better insulated than a
chimney that is located outside the house and exposed to the
weather, the north side of the house is the worst position.
Check manual for proper installation of flue pipe into chimney.
FURNACE INSTALLATION
Install your furnace as close to the chimney as possible with a
minimum of elbows, no more than two and a flue pipe run of no
more than 6 feet horizontally. Also, the flue pipe should contain
a 1/2" rise per foot and NEVER be installed closer than 18" from
combustibles.
WOOD BURNING: Install a manual flue pipe draft damper at a
safe, convenient location between your furnace and chimney.
COAL BURNING: Install a barometric damper set at .05 Water
Column.
AIR FLOW: Solid Fuel furnaces produce much hotter air than oil
or gas fired appliances so all clearances are mandatory.
AIR DUCT INSTALLATION: This furnace provides a 12" round (113
sq. in.) opening, because of efficiency and general conve-
nience.
United States Stove Company recommends a Parallel Furnace
Installation with direct (ducted) feed or return air to your fur-
nace. NOTE: Cold air duct intake must be at least 25% larger
than hot air duct outlet.
FURNACE ASSEMBLY
U.S. Stove provides easy step by step pictures, therefore, the
furnace assembly procedure should be understandable.
FIRING YOUR FURNACE
Start on a conservative basis. Your new furnace, when properly
fired with hard dry wood will achieve approximately 6 to 8 hours
of burn time per load of wood, much longer with coal. If the
furnace is being fired hot constantly with full flames and only
provides a 3 hour burn cycle, the furnace is being overfired.
Possibly your heating requirements are too much for the size of
furnace purchased. Certainly allowing your existing furnace to
assist in extremely cold weather is no crime. Remember, your
furnace can be damaged if fired continually at extremely high
temperatures and this procedure will void your warranty.
CAUTION: OVERFIRING YOUR
FURNACE VOIDS WARRANTY.
OVER FIRING
This generally occurs when the following procedures are not
followed, ash door is open (even partially open), the feed
door pressure relief flap is open, the feed door is open or the
manual draft spinner is open. Open the ash and feed doors
only when in attendance, never leave the furnace unattended
when doors are open. This furnace has an automatic draft
fan so use the manual draft with a specific purpose. Also, an
overfilled ash drawer can cause grate warpage, keep ash
drawer clean. Don't use furnace if distribution fan isn't func-
tioning properly, and keep air filter clean. Draft fan opening
should be set at 1/2" open as a point of start, depending on
condition of fuel.
U. S. Stove recommends a very active fire at all times for maxi-
mum results, but only as instructed.
SOME HELPFUL HINTS
•Your furnace will hold logs approximately 2" shorter than the
length of the firebox. Don't force in oversized logs.
•Unsplit, dry logs will provide longer burn time than split logs.
•Don't ever try to burn trash or garbage.
•Keep flue pipe stack temperature between 300 and 400
degrees. This will reduce creosote build-up. A magnetic sur-
face thermometer can be obtained from your dealer.
•Weather is the most important determinant in how you oper-
ate your furnace (assuming you have dry wood).
•The colder it is the stronger the draft, warm weather reduces
draft. Set your draft fan rheostat and manual draft accord-
ingly.
•Open manual smoke damper only when starting the fire and
when chimney draft is marginal.
•Always place logs so air can flow between them.
•Shake gently (up to 10 o'clock down to 8 o'clock) don't try to
loose weight shaking down ashes!
•Wood ash is useful as a fertilizer because it contains potas-
sium, ashes also decrease the acidity of the soil. Coal ashes will
provide good traction on ice or snow, otherwise they are use-
less.
•Always store ashes in a metal container with a lid.
•Ashes are a good thermal insulator and will keep enough
oxygen away so embers will not burn out.
•Never, never let ashes accumulate up to grate level, this will
greatly reduce the life span of your grate.
•Coal produces much more ash than wood.
•Keep your chimney and flue pipe clean, check monthly.
•Smoke detectors and fire extinguishers should always be a
part of your equipment.
•Never use chemicals or fluids such as gasoline, charcoal lighter,
drain oil or kerosene to light a fire.
•Oil the air fan motors yearly. They do not contain bearings,
sleeves with felt. Therefore keeping fan air clean is more impor-
tant than oiling.
•Turn on your regular furnace once every month to keep it
tuned up.
•Always shut the furnace down gradually to prevent exces-
sive stress on steel.
WARPAGE OF STEEL IS COMMON, AGGRESSIVE BUT GENTLE FIR-
ING CAN MINIMIZE WARPAGE.
•There is no substitute for dry hard wood. Wood requires 6
months to a year to air dry to 25% moisture content or less.
•Don't throw heavy, wet wood into your Jensen, it could crack
the firebox and bricks.
•Treat your furnace with the proper respect and it will reward
you with much comfort, and a lifetime of central heat.
