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Wood & Coal Burning Furnace
Owners Manual
Models: 24AF, 24AG, 24AZ
TESTED TO UL 391
All installations must be made in accordance with local and state codes
which may differ from this manual.
UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O. Box 151
R
US
South Pittsburg, TN 37380
USSC 851224C Page 1
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CHIMNEY INSTALLATION OVER FIRING Your new furnace must be installed into a "Class A" Chimney only. This generally occurs when the following procedures are not fol- This type of chimney consists of a flue lined brick chimney, or an lowed, ash door is open (even partially open), the feed door pressure approved "Class A" all fuel factory built (prefabricated) type. Any relief flap is open, the feed door is open or the manual draft spinner other installation guarantees an immediate fire hazard. is
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Welcome... ...to the world of solid fuel heating! Your new furnace has been designed and built with a high grade of materials and the strictest regard to quality. Before you start installing your new furnace, take the time to read these installation and operating instructions. We have prepared them for your benefit to save time and provide some helpful knowledge on wood and coal burning. Save the instructions for future use. It won't take long for you to realize the benefit of solid fuel heat
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General Rules Rules for the Safe Installation and Operation of Your In the event of a chimney fire call the fire depart- Furnace... ment, then be sure the furnace doors are closed tightly and the power to the unit is turned off. Check local codes, the installation must comply with strict conformance in regard to clearances. The Furnace must be installed on a noncombustible floor. The furnace is designed to burn air dried wood and coal at a predetermined firing rate. Over firing could result in
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How... How Your New Furnace Works Unlike conventional heating (gas, oil, electric), wood or coal heating requires more user attention. Your furnace, with its automatic combustion air blower, alleviates the constant need for adjusting the burning rate common to other units WARNING on the market. The fire, however, must be started and Note: Improper firing. Wood or coal over firing oc- subsequent fuel added by the user. curs when the ash door is left open during operation or a highly volatile
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Parts FOR MODEL(S): 24AF 21 25 23 24 36 28 23 38 18 17 4 8 26 22 39 20 19 37 6 7 27 5 12 9 1 10 15 11 34 27 14 13 16 31 29 26 33 30 32 35 Page 6 USSC
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Parts KEY PART # DESCRIPTION QTY. 1 69072 FIREBOX WELDMENT 1 2 C97999 WATER COIL COVER GASKET 1 3 24220 INSIDE COVER PLATE 1 N / S C23799 12 x 3/4" TEKS SCREW 3 N/S 83236 1/4-20 x 3/4" HX SCREW 4 4 25085 FEED DOOR 1 N/S 88033 3/8" ROPE GASKET (FEED DOOR) 4.25 FT. N/S C21390 7/32 x 1 ROLL PIN (FEED DOOR) 2 5 24482 PRESSURE FLAP 1 N / S 88075 3/4 FLAT ROPE GASKET 1 FT. N/S C21390 7/32 x 1 ROLL PIN (PRESSURE FLAP) 2 6 69077 FEED DOOR HANDLE ASSY. 1 7 83379 1/4-20 x 1 BOLT 1 8 83261 1/4-20 LOCK NUT
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Parts FOR MODEL(S): 24AG, 24AZ 21 25 44 42 43 23 24 36 28 23 38 39 17 18 41 22 48 26 45 20 19 37 6 7 40 27 5 12 9 10 15 11 1 34 27 14 13 16 31 29 26 33 30 32 35 Page 8 USSC
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Parts KEY PART # DESCRIPTION QTY. 1 69315 FIREBOX WELDMENT 1 2 C97999 WATER COIL COVER GASKET 1 3 2 4 2 2 0 INSIDE COVER PLATE 1 N/S C23799 12 x 3/4" TEKS SCREW 3 N / S 83236 1/4-20 x 3/4" HX SCREW 4 4 2 5 0 8 5 FEED DOOR 1 N / S 88033 3/8" ROPE GASKET (FEED DOOR) 4.25 FT. N/S C21390 7/32 x 1 ROLL PIN (FEED DOOR) 2 5 24 48 2 PRESSURE FLAP 1 N / S 8 8 0 7 5 3/4 FLAT ROPE GASKET 1 FT. N/S C21390 7/32 x 1 ROLL PIN (PRESSURE FLAP) 2 6 69326B FEED DOOR HANDLE ASSY. 1 7 83379 1/4-20 x 1 BOLT 1 8 8 3 2
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Installation Furnace location Chimney location is also critical. The furnace must be Before you start! placed as close as possible to the chimney. You want the It is very important you check with your dealer, local fire chimney connector (smoke pipe) to have a minimum of department, or building inspector. They will be able to in- elbows, two (2) or less. Also, the chimney connector should form you of any state or local codes pertaining to the loca- not have to run more than six (6) feet to t
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Your furnace is designed to be added on to existing duct Clearance to Combustibles work and operate either with or without another heat source such as a gas furnace. The following diagrams illustrate Furnace to back wall 30" acceptable ways of ducting your furnace. Furnace to side wall 12" Clearance to Combustible Materials Pipe to back wall 18" Your Furnace has been tested to determine the SAFE clear- ances to combustible material. The clearances are printed Pipe to side wall 18" on the label
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FLUE RECOMMENDATIONS The termination cap should be designed to inhibit downdrafting without restricting the exhaust Chimney experts have determined that discharge. the flue termination should be at least 2' above the highest portion of the roof that is within a 10' radius. The flue termination should be at least 3' above the roof line. CAUTION! Only a "Class A", all-fuel chimney in- tended for use with solid fuel should be used. "Class A" chimneys are those made from tile-lined masonry (brick or
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CHIMNEY INSTALLATION FACTORY-BUILT OR METAL CHIMNEYS With the chimney being the most important part to your If your home has an existing metal chimney, the same rules installation, great care should be given to its design. apply as with masonry chimneys. One thing to be espe- cially aware of is that "Class B" chimneys are for gas appli- ances only, not solid fuel burners. If purchasing a new MASONRY CHIMNEYS package, consult with the dealer. He will provide the nec- If your intention is to us
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NOTE: Your furnace may come partially pre-assembled, but in the case that it is not, follow the instruc- tions below. Prior to assembling, place the unit in the general vicinity of the installation. This should help minimize handling damage to the unit after assembly. Note: If your basement can't handle a height of 7' 8" you must lay the furnace on two, 2 x 4's to slide shrouds onto weldment. Then stand furnace up. 3. Attach the draft fan to the back of the weld on the throat (2" throat hole
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5a. Attaching furnace control center box. To separate outer 7. Wall thermostat should be mounted on an upstairs in- cover, remove two (2) side screws and pull off black side wall (no outside facing wall) preferably near your rheostat knob. Attach box to left side (facing feed door) existing thermostat. For more specific information, read with four (4) self-threading screws. One screw in the Honeywell instruction sheet provided with thermo- each corner. (NOTE: Furnace control center is desi
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CAUTION: Any hot air plenum connection to a furnace must be constructed of metal. 11. Installing Grates: Install grates together, slip shaker lug into hole and place grates into frame. Grate arch faces upward. Check out grate rotation by placing shaker handle on grate lug (3/4"). Grates should ro- 9. Installing collar to top: To install hot air attaching tate freely. collar, simply bend all tabs right angle under shroud. NOTE: Grates are designed to withstand high tempera- This may be possi
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13. Installing front and rear cast baffles, heat plates. 15. Installing smoke damper rod to sliding smoke damper. NOTE: Grate frames and brick will slide forward and First, insert rod through hole above feed door and push backward to allow baffle to fit. Install front cast baffle forward. using two (2) 5/16 bolts, nuts & washers (7/16 wrench will be needed). Place the side of the baffle that has the two ribs against the front weld of the firebox. Do not tighten bolts yet. Place the rear cast
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17. Reposition door latches, feed and ash door. 19. Attach flue pipe to flue collar. Flue pipe (6") fits inside For shipping purposes, door latches are on backwards. furnace flue collar. Finish off with three (3) metal Unfasten 7/16" nuts, reverse and snug fairly tight screws. NOTE: Flue pipe connections flow downward (latches must move freely). so creosote can return to furnace for burn up. 18. Installing steel smoke shield. Two (2) holes are pro- vided above each corner of the feed door.
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Accessories Filter Box Part # 24CRM NOTE: DRAWINGS ARE FOR ILLUSTRATION PURPOSES ONLY. ACTUAL PRODUCTS MAY LOOK DIFFERENTLY. Domestic Hot Water Coil Part # 11WCK USSC Page 19
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WIRING DIAGRAM THERMAL DISC ROOM DISTRIBUTION FAN THERMOSTAT NOTE: RHEOSTAT IS ADJUSTABLE. IN CASE OF LOW VOLTAGE TURN COUNTERCLOCKWISE UNTIL BLOWER WILL RUN, BUT (1) HI-SPEED PT# 80389 NOT STALL, WHEN POWER IS RETURNED TO UNIT. ENERGIZES WHEN UNIT IS FIRED AGGRESSIVELY ONLY. (2) LOW SPEED PT# 80388 BLUE ADJUSTABLE IN APPROX. ORANGE 5 DEGREE STEPS. A LOW SETTING TURNS BLOWER ON RHEOSTAT SOONER. YG W CR Rotate here PT# 80090 with flat-blade screwdriver (3) PT# 80390 BLACK RED (LOCATED ON LEFT
