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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

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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

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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

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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

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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

Page 1: ...ce is not properly installed a house fire may result For your safety follow these installation instructions Contact local building or fire officials about restrictions and installation requirements in...

Page 2: ...2...

Page 3: ...se qAlternative Heat qMain Heat Source qDecoration qCost qOther _________________________ What was the determining factor for purchasing your new appliance _____________ I have read the owner s manual...

Page 4: ...4 Fold Here Fold Here United States Stove Company P O Box 151 South Pittsburg TN 37380 Fold Here PLACE STAMP HERE CUT HERE CUT HERE...

Page 5: ...ent and the chim ney to which the unit is attached The actual area that this unit will heat depends on factors such as the conditions of the building heat loss type of construction amount of insulatio...

Page 6: ...r bird screen should be in stalled on top of the chimney CREOSOTE FORMATION AND NEED FOR REMOVAL When wood is burned slowly it produces tar and other organic vapors which combine with expelled moistur...

Page 7: ...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...

Page 8: ...er furnace per formance Failure to provide return air ducts of the specified size will void your warranty A filter should be installed in the cold air return Furnace filters should be checked and clea...

Page 9: ...ackets on the left side of the door frames as il lustrated The slots in the brackets and latches are for door seal adjust ment Make the proper adjustments then tighten the nuts The door s gasket shoul...

Page 10: ...ack The conduit as sembly should already be attached to the limit control otherwise do so then make the correct wiring connections to the limit control See wiring diagram 4 Next mount the junction box...

Page 11: ...he furnace Then mount and secure the draft blower to the adapter with the three 10 24 Kep nuts Plug the blower into the outlet on the front of the furnace 1 Draft Blower 1 Draft Blower Adapter 2 1 4 2...

Page 12: ...In normal shaking only rock the grates a small amount to sift ash through Do not agitate the fire bed too often This practice will waste coal If glowing coal is visible in the ash pan you have shaken...

Page 13: ...not recommended burning the furnace any more than necessary early in the fall and late spring as you cannot keep the firebox hot enough without overheating your home to burn gases Slow fires can cause...

Page 14: ...C Makesurechimneycapisnottooclosetothetopofthechimney D Check chimney draft make sure chimney flue pipe is clean and chimney is of adequate height E Makesureyou renotsuffocatingthefirewithexcessiveam...

Page 15: ...15 PARTS DIAGRAM 11 12 13 16 15 17 14 7 10 5 2 3 6 32 31 4 3 2 1 37 3 8 9 24 26 25 27 17 16 3 19 18 20 28 29 30 36 21 22 34 34 35 23 33...

Page 16: ...ng 22761 1 24 Smoke Curtain 23800 1 25 Smoke Door Clip 23787 2 26 Carriage Bolt 1 4 20 x 1 1 4 Long 83445 2 27 Kep Nut 1 4 20 83250 2 28 Cabinet Side Left 69676B 1 29 Insulation Side C98771 2 30 Insul...

Page 17: ...he coil with the appropriate fittings As mentioned earlier in this manual a cold air return and or filter box should be incorporated into your furnace installation A cold air re turn or filter box wil...

Page 18: ...cy There will have to be some experimenting with the individual setup as no two chimney s or installations are going to be the same Just remember to allow enough air to enter the firebox and keep the...

Page 19: ...llow the same procedure as for refueling If possible avoid shaking as a heavier layer of ash will help reduce the intensity of the fire during this time After loading let the fire establish itself for...

Page 20: ...ure reference When placing an order or for warranty claims please provide the following information found on the Certification Plate located below the ash door PART NUMBER PART DESCRIPTION MODEL NUMBE...

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