7
DAMPERS ON STOVE PIPES
When burning coal, we recommend a Barometric Draft Damper be
installed at a safe convenient place between chimney and your furnace
preferably less than 3’ from the flue collar.
When you have installed the connector pipe between your furnace
and the chimney, tap the pipe hard with your fingernail. Remember
the sound it makes - it will be a “ting” echoing inside the stove pipe. If
later you tap and hear a muffled thud, you are building up soot in the
pipe and should clean it. This pipe should be cleaned at least once or
twice during the heating season.
DO NOT CONNECT TWO HEATERS TO THE SAME CHIMNEY
FLUE. The National Fire Prevention Association recommends that wood
burning appliances vent into a separate flue from gas or oil furnaces. If
such an installation is contemplated, first check with a local building
inspector to find out if a separate flue for a wood burner is required.
Use of a Barometric Draft Control (when burning wood) is recommended
ONLY in the event your chimney creates excessive draft leading to an
over-firing condition.
HEATED AIR DISCHARGE
The furnace is designed for use as a supplemental heating source. When
used as a supplementary furnace, it is connected in conjunction with an
oil, gas, or electric furnace to the existing duct work which distributes
the heated air into several rooms and/or areas.
Though United States Stove Company expressly Does Not
recommend
CONNECTING HOT AIR DUCT
TO FURNACE
when installed with existing oil or gas furnaces.
INSTALLATION EXAMPLES
INSTALLATION #1
With this installation, a back draft damper (optional) is inserted into
the heat run before the plenum of the existing furnace to prevent air
from the existing furnace to blow back into the furnace when it is not
in use. When a back damper is employed, it should be located as close
to the existing furnace plenum as practical.
IMPORTANT INFORMATION FOR ALL
CONNECTOR PIPES
The connector pipe must be constructed and installed so that it main
-
tains clearances, keeps condensation and creosote within the pipe, and
is capable of withstanding a 2100°F degree chimney fire.
1. The connector pipe should slant down toward the furnace a mini
-
mum of 1/4” to the foot. At no time should the pipe turn downward
toward the chimney or run horizontal.
2. There should be no more than two 90 degree elbows.
3. The connector pipe should never be longer than six feet. If it is
absolutely necessary to make a run of more than six feet (not
recommended) use extra support brackets every 3 feet.
4. The connector pipe should never be reduced to a smaller size than
flue opening on the furnace.
5. The connector pipe should not block the flue of the chimney or
extend into it in any way.
6. A good airtight thimble should be used to hold the connector pipe
in the chimney. It should be constructed so the connector pipe can
be removed for cleaning.
7. The connector pipe should not leave the heated portion of the
building to reach the chimney.
8. The connector pipe should not pass from one story to the next
before entering the chimney, nor should it pass through any closed
or enclosed space.
9. The connector pipe and any elbows must be of 24 gauge or greater.
10. The connector pipe should not be located near or in a walk way or
well traveled area.
11. All male ends of connector pipe should run or point towards the
furnace.
12. Install a cast iron adjustable damper in the first joint of the con
-
nector pipe, nearest to the flue collar.
the use of its furnaces to be installed and/or used as a free-standing
heater, it is possible to achieve a reasonably safe and functional instal
-
lation
IF certain standard procedures are followed. The following are
guidelines only and are intended to enable the furnace user to obtain
reasonable efficiency from his furnace, and with due respect to safety
when installing as a “free-standing heater”. If installed correctly, and
in accordance with the instructions found in this manual, your warm
air furnace may be installed as a “space heater” within living quarters,
cabins, garage, or workshop. Please adhere to the following:
1. The use of a cold air return and/or filter box is mandatory. This will
not only increase your blower life and provide filtered air, it will
also help prevent the blower or blowers from “capturing” heated air
exiting from the top of the furnace heat outlets.
2. If installed as purchased , without directing the heat away from the
furnace itself, it will simply sit and cycle, turning the blowers off and
on. The thermostat may not function properly.
3. All larger furnaces (or those with multi-speed blowers) absolutely
require BACK PRESSURE to prevent premature motor winding
failure. If allowed to operate at high RPM (As in “FREE AIR” mode
- no duct work or flow restrictions) the windings overheat, insulation
melts and the motor simply burns up - not covered under warranty.
We strongly recommend that the hot air duct work be installed by a
home heating specialist. If doing the installation yourself, before you
decide which installation will best suit your needs, consult a qualified
heating technician and follow his recommendations as to the safest and
most efficient method of installation.
The following illustrations are the ONLY acceptable configurations
Summary of Contents for SF747
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