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USSC

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851224D

UNITED STATES STOVE COMPANY

227 Industrial Park Road

P.O. Box 151

South Pittsburg, TN 37380

All installations must be made in accordance with local and state codes

which may differ from this manual.

Wood & Coal Burning Furnace

Owners Manual

Models: 24AF, 24AG, 24AZ

TESTED TO UL 391

Summary of Contents for 24AF

Page 1: ...Y 227 Industrial Park Road P O Box 151 South Pittsburg TN 37380 All installations must be made in accordance with local and state codes which may differ from this manual Wood Coal Burning Furnace Owners Manual Models 24AF 24AG 24AZ TESTED TO UL 391 ...

Page 2: ... fol lowed 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 ke...

Page 3: ... won t take long for you to realize the benefit of solid fuel heating however maintenance is the key to a long lasting relationship with your new furnace These instructions can help you now as well as in the future Note This owners manual is provided for Forced Air add on furnaces United States StoveCompanyisconstantlydevelopingandimprovingitsproductline therefore we reserve the right to change sp...

Page 4: ...rn air dried wood and coal at apredeterminedfiringrate Overfiringcouldresultindam age to the heat exchanger and cause dangerous opera tion Over firing occurs when the ash door is left open during operation or a highly volatile fuel such as large amounts of small kindling is used Note This action voids allwarranty Follow a regular service and maintenance schedule of the furnace and chimney for effi...

Page 5: ...ting is inefficient and often leaves part of the home either too hot or too cold Your furnace is designed to deliver heat as long as there is a fire in it The fire intensity is regulated by the room thermostat high or low the fire continues to pro duceheat Thisheatiscontinuouslydistributedthroughout the home by a distribution blower This constant supply of heat is uniform and prevents drafts WARNI...

Page 6: ...Page 6 USSC Parts FOR MODEL S 24AF 1 2 3 4 8 26 22 6 7 27 5 9 10 11 27 14 13 16 31 29 26 33 35 15 12 30 32 34 19 20 18 17 39 37 36 25 21 24 23 28 38 ...

Page 7: ...LOCKNUT 1 13 24382 SPINDAMPER 1 14 83471 5 16 18x1 3 4 CARR BOLT 1 15 83423 5 16 18HEXLOCKNUT 1 16 69068 ASHDRAWERASSY 1 17 24501 SMOKECURTAIN 1 18 83445 1 4 20x1 1 4 BOLT 2 19 83261 1 4 20LOCKNUT 2 20 23787 SMOKEDOORCLIP 2 21 89799 STUBCOLLAR 1 22 24528 DAMPERROD 1 N S 83874 1 8DIA x1 1 2 COTTERPIN 1 23 69080 CONTROLCENTER 1 24 69097 FORCEDDRAFTBLOWERASSY 1 25 80129 THERMOSTAT 1 26 89574 SPRINGHA...

Page 8: ...Page 8 USSC Parts FOR MODEL S 24AG 24AZ 1 2 3 4 8 26 22 6 7 27 5 9 10 11 27 14 13 16 31 29 26 33 35 15 12 30 32 34 19 20 18 17 45 37 36 25 21 24 23 28 38 40 39 41 43 42 44 ...

Page 9: ...22 24528 DAMPERROD 1 N S 83874 1 8 DIA x 1 1 2 COTTER PIN 1 23 69321G CONTROLCENTER 1 69323 CONTROLCENTER STAINLESSSTEEL 1 24 69097 FORCEDDRAFTBLOWERASSY 1 25 80129 THERMOSTAT 1 26 89574 SPRINGHANDLE DAMPERROD SHAKER 2 27 89849 HOOKSPRINGHANDLE FEED ASHDOOR 2 28 69082 JUNCTIONBOXASSY 1 29 69069 SHAKERGRATEHANDLE 1 30 40369 SHAKERGRATEFRAME 2 31 40349 SHAKERGRATE 2 32 40366 FIREBOXLINER 2 33 24496 ...

Page 10: ...ctical Chimney location is also critical The furnace must be placed as close as possible to the chimney You want the chimney connector smoke pipe to have a minimum of elbows two 2 orless Also thechimneyconnectorshould not have to run more than six 6 feet to the chimney CAUTION The warm air supply outlet of the Fur nace should not be connected to the cold air re turn inlet of the central furnace be...

Page 11: ...The chart on this page also states these minimum clearances Make sure you follow these when choosing your furnace loca tion Any hot air plenum connection to a furnace must be con structed of metal NOTE INSTALLONLYONANON COMBUSTIBLEFLOOR Clearance to Combustibles Furnace to back wall 30 Furnace to side wall 12 Pipe to back wall 18 Pipe to side wall 18 Furnace to ceiling 30 Ductworktoceiling 18 6 1 ...

Page 12: ...rick or block or an independent laboratory approved all fuel factory built chimney CAUTION Only a Class A all fuel chimney in tended for use with solid fuel should be used Chimney experts have determined that 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 The termination cap sh...

Page 13: ...llation INSTALLING A NEW CHIMNEY When installing a new chimney whether it be masonry or metal if possible it is recommended that it is placed within the house structure These chimneys remain warmer and in turn radiate this warmth into the house A chimney located outside the house is exposed to cold temperatures whichencouragescreosotebuild upandpoorchimneydraft CHIMNEY INSTALLATION With the chimne...

Page 14: ...ust be fastened prior to shroudinstallation NOTE The furnace is partially prewired all that is re quired is the wiring of the distribution fan see wiring diagram page 18 and the wiring to wall the thermo stat 4 After mounting the two 2 fans proceed to the fan control center NOTE The best maintenance for fan motors is to keep them clean exceptionally clean Oiling with 20W N detergent once a season ...

Page 15: ...ews and pull off black rheostat knob Attach box to left side facing feed door with four 4 self threading screws One screw in eachcorner NOTE Furnacecontrolcenterisdesigned for left side attachment Should space prohibit such reversing shrouds for right side installation is possible however control wires from box will have to be ex tended Next attach the 4x4 junction box below the control center box...

Page 16: ...y be possible with thumbs if not remove top and use small hammer CAUTION Anyhotairplenumconnectiontoafurnacemust be constructed of metal 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 tate freely NOTE Gratesaredesignedtowithstandhightempera tu...

Page 17: ...ng two 2 5 16 bolts nuts washers First line up the top holes and tighten bolts Secondly line up the holes in the rear baffle and the heat plate with the firebox and attach by using two 2 5 16 bolts nuts washers Tighten all four 4 bolts NOTE to reach rear bolts you may find it easier to put your arm through the flue outlet rather than to reach through the feed door 15 Installingsmokedamperrodtoslid...

Page 18: ...th the slots in thesmokeshield Tightenthe 2 boltsandnuts NOTE The smoke shield should be able to swing back and forth The smoke shield will help prevent smoke back puffing if you have a lazy flue 17 Reposition door latches feed and ash door For shipping purposes door latches are on backwards Unfasten 7 16 nuts reverse and snug fairly tight latches must move freely 19 Attach flue pipe to flue colla...

Page 19: ...USSC Page 19 Accessories Domestic Hot Water Coil Part 11WCK Filter Box Part 24CRM NOTE DRAWINGSAREFORILLUSTRATIONPURPOSESONLY ACTUALPRODUCTSMAYLOOKDIFFERENTLY ...

Page 20: ...RPLE BLACK PURPLE BLACK WHITE WHITE BLACK BLUE BLACK BLUE WHITE ORANGE PURPLE GREEN BLACK 120 VAC 60 Hz 15 AMPS NOTE WIRES FROM DISTRIBUTION FAN RUN DIRECTLY INTO THE 4 x 4 JUNCTION BOX DISTRIBUTION FAN PT C60456 DRAFT FAN PT 80392 Rotate here with flat blade screwdriver THERMAL DISC FAN ADJUSTMENT DRAFT FAN 3 HI LIMIT PT 80390 DE ENERGIZES WHEN UNIT REACHES TEMPERATURES OF APPROX 170 DEGREES THER...

Page 21: ...prevents electrical surges provides longer life of snap disk Transformer Reduces voltage 110 volts to 12 volts for thermostat usage Generally hums a bit ELECTRICAL COMPONENTS Wall Thermostat 110 degrees Adjustable Thermo Disk 140 degrees Thermostat 170 degrees Thermo Limit Disk Relay Transformer AirDistributionFan Draft Fan Control Box Components Your new furnace is now completely assembled and re...

Page 22: ...This occurs when there is unburned fuel and a large amount of gases on the top of the firebox When the door is opened oxygen is combined with the gases and ignites ASH REMOVAL Every morning when there is just a bed of hot embers shake the grate very very lightly Once every week or two depending on how much fuel you burn ashes should be removed Note A 2 to 3 bed of ashes will prolong wood burning a...

Page 23: ...e less smoke Once the fire is WELL ESTAB LISHED add coal to the center of the firebox forming the cone Burning in this fashion allows heat to drive off the volatile gases and turbulence created increases the burn efficiency Youwillhavetoexperimentwithyourparticular setup as no two chimney s or installations are going to be the same Just remember to allow enough secondary air to enter the firebox a...

Page 24: ... gradually burns it over a longer period of time You will also reduce the intensity of the fire without letting it go out Follow 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 about 30 minutes Then close your damper to the point where the house does n...

Page 25: ...aking Poking the fire from the top Too little air draft after a long hot fire caused by rapid adjustment of draft from a very high setting to a low setting If clinkers do form the coal quality should be checked first and then all the above points should be reviewed and corrected SAFETY Whenever a loading door is opened the bypass damper should be opened first use a glove to protect you hand and th...

Page 26: ...ly then refuel B Check length of flue pipe to chimney Your unit should be within six 6 feet of your chimney C Make sure chimney cap is not too close to the top of the chimney D Check chimney draft make sure chimney flue pipe is clean and chimney is of adequate height E Make sure you re not suffocating the fire with excess amounts of unburned fuel Problem Distribution blower vibrating Solution A Ti...

Page 27: ...USSC Page 27 Notes ...

Page 28: ...PLACE FOR FUTURE REFERENCE WHEN WRITING ALWAYS GIVE THE FULL MODEL NUMBER WHICH IS ON THE NAMEPLATEATTACHEDTOTHEHEATER WHEN ORDERING REPAIR PARTS ALWAYS GIVE THE FOLLOWING INFORMATION AS SHOWN IN THIS LIST 1 THE PART NUMBER 2 THE PART DESCRIPTION 3 THE MODEL NUMBER 24AF 24AG 24AZ 4 THE SERIAL NUMBER ____________________ ____________________ ____________________ ____________________ _______________...

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