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CAUTION: Never alter the damper slide or the adjustment range to increase 

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 ring for any reason. Doing so could 

result in heater damage and will void your warranty.

HEATING WITH YOUR WOOD FURNACE

1) 

Spread the 

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 re and coals evenly towards the center of the combustion chamber before loading your furnace 

fully or adding more wood.

2) 

Avoid over

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 lling the combustion chamber. Air must be allowed to circulate freely through the upper portion 

of the combustion chamber for the stove to perform best. Typically this would mean not to load your furnace 

more than ¾ of the way up the door opening.

OPERATION

Controlled combustion is the most ef

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 cient technique for wood heating because it enables you to select the 

type of combustion you want for each given situation. The wood will burn slowly if the wood furnace air intake 

control is adjusted to reduce the oxygen supply in the combustion chamber to a minimum. On the other hand, 

wood will burn quickly if the air control is adjusted to admit a larger quantity of oxygen in the combustion chamber. 

Real operating conditions may give very different results than those obtained during testing according to the 

species of wood used, its moisture content, the size and density of the pieces, the length of the chimney, altitude 

and outside temperature.

WARNINGS

•  NEVER OVER FIRE YOUR FURNACE. IF ANY PART OF THE FURNACE STARTS TO GLOW RED, OVER FIRING IS HAPPENING. 

READJUST THE AIR INTAKE CONTROL AT A LOWER SETTING.

•  THE INSTALLATION OF A LOG CRADLE OR GRATES IS NOT RECOMMENDED IN YOUR WOOD FURNACE. BUILD FIRE 

DIRECTLY ON FIREBRICK.

•  NEVER PUT WOOD ABOVE THE FIREBRICK LINING OF THE FIREBOX.

RELOADING

Once you have obtained a good bed of embers, you should reload the unit. In order to do so, open the air 

controls to maximum a few seconds prior to opening the furnace’s door.  Then proceed by opening the door very 

slowly. Then bring the red embers to the front of the furnace and reload the unit.

For optimal operation of your wood furnace, we recommend you to operate it with a wood load approximately 

equivalent to the 3/4 of the height of 

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 re bricks.

It is important to note that wood combustion consumes ambient oxygen in the room. In the case of negative 

pressure, it is a good idea to allow fresh air in the room, either by opening a window slightly or by installing a fresh 

air intake system on an outside wall.

Creosote - Formation and Need for Removal - When wood is burned slowly, it produces tar and other organic 

vapors, which combine with expelled moisture to form creosote. The creosote vapors condense in the relatively 

cool chimney 

fl

 ue of a slow-burning 

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 re. As a result, creosote residue accumulates on the 

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 ue lining. When ignited, 

this creosote makes an extremely hot 

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 re. The chimney connector and chimney should be inspected at least twice 

monthly during the heating season to determine if a creosote build-up has occurred. If creosote has accumulated 

(3mm or more), it should be removed to reduce the risk of a chimney 

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 re.

We strongly recommend that you install a magnetic thermometer on your smoke exhaust pipe, approximately 

18” above the furnace. This thermometer will indicate the temperature of your gas exhaust fumes within the 

smoke exhaust system. The ideal temperature for these gases is somewhere between 275°F and 500°F. Below 

these temperatures, the build-up of creosote is promoted. Above 500 degrees, heat is wasted since a too large 

quantity is lost into the atmosphere.

TO PREVENT CREOSOTE BUILD UP

Always burn dry wood. This allows clean burns and higher chimney temperatures, therefore less creosote deposit.

Leave the air control full open for about 5 min. every time you reload the furnace to bring it back to proper 

operating temperatures. The secondary combustion can only take place if the 

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 rebox is hot enough.

Always check for creosote deposit once every two months and have your chimney cleaned at least once a year.

Summary of Contents for AF700

Page 1: ...Y OWNER S INSTALLATION AND OPERATION MANUAL MODEL AF700 Installation is to be preformed by a qualified installer SAVE THESE INSTRUCTIONS This unit is certified UL 391 United States Stove Company 227 Industrial Park Rd South Pittsburg TN 37380 852426C 3203E U S Environmental Protection Agency Certified to comply with 2015 particulate emissions standards ...

Page 2: ...ts of the central furnace overheating and causing the central furnace to operate other than as intended Power source not controlled by furnace main disconnect Respect all local and national codes when installing this unit This unit is not to be connected to a chimney flue serving another appliance This unit is designed to burn solid hardwood only 38 39 26 07 1 97 33 63 28 01 40 73 ...

Page 3: ... Volume Cubic Feet 3 6 cubic feet Door Opening Width x Height 13 6 x 9 8 345mm x 248mm Pyroceramic Glass Door Viewing Width x Height 13 x 10 75 330mm x 273mm Weight lbs 470 SPECIFICATIONS CONGRATULATIONS You ve purchased a heater from North America s oldest manufacturer of wood burning products By heating with wood you re helping to CONSERVE ENERGY Wood is our only Renewable Energy Resource Please...

Page 4: ...nd chimney must be kept in good condition These instructions also apply to a draft inducer if used To prevent flame or smoke spillage the slide baffle must be pulled out and the fuel loading door left cracked for 10 seconds prior to opening door fully Load fuel carefully or damage may result Hot while in operation Keep children clothing and furniture away Contact may cause skin burns Do not use ch...

Page 5: ...ck arrangement TOOLS AND MATERIALS NEEDED FOR INSTALLATION The following is a list of tools and materials needed to install your furnace 7 16 socket wrench 5 16 socket Best if using a power drill and a socket bit Pair of pliers or channel locks Power drill with an 1 8 drill bit to install sheet metal screws into connector pipe Sheet metal screws Non combustible floor protector as specified in this...

Page 6: ... ensure proper assembly installation and operation of your new furnace If installing in an area with a fan it should not be allowed to create negative pressure in the room where the furnace is installed LOCATING YOUR FURNACE INSURE THAT THE REQUIRED MAINTENANCE CLEARANCES ARE MAINTAINED Your furnace must be installed as shown in this manual and in compliance with all local and national codes It is...

Page 7: ...e Front 24 610 J Maintenance Clearance Left 24 610 K Maintenance Clearance Right 24 610 L Maintenance Clearance Rear 36 915 P M Q N R R J K L H MAINTENANCE CLEARANCE Dimension Inch mm M Front 22 558 8 N Flue rear 2 51 P Left 8 204 Q Right 8 204 R Flue Side 2 51 FLOOR PROTECTOR REQUIREMENTS FLOOR PROTECTOR The furnace must be placed on solid concrete solid masonry or when installed on a combustible...

Page 8: ...e plenums installed to the furnace shall be constructed of metal in accordance with NFPA 90B 2 1 3 When installing this furnace the hot air plenum is to have a minimum height of 24 610mm if the top of the first vertical section is not flush with the top of the first horizontal section of ductwork If the top of the plenum is flush with the top of the first horizontal section of ductwork then the mi...

Page 9: ...s listed below The return air will duct directly to the return of the new furnace and not be pulling through any other furnace The output of the existing furnace must be equal to or greater than this wood furnace If installing in a parallel configuration the ductwork may need adjustments so as to maintain the static pressure between 0 2 W C And 0 05 W C A back flow damper must be installed in the ...

Page 10: ...10 CENTRAL INSTALLATION ADD ON INSTALLATION ...

Page 11: ...LID FUEL FURNACE FILTER BOX EXISTING FURNACE COLD AIR RETURN WARM AIR TO EXISTING DUCT WORK INSTALLATION B SOLID FUEL FURNACE FILTER BOX COLD AIR RETURN EXISTING FURNACE PLENUM COLLECTOR BOX WARM AIR TO EXISTING DUCT WORK ...

Page 12: ...12 INSTALLATION D INSTALLATION E ...

Page 13: ...13 INSTALLATION H TOP VIEW FRONT VIEW INSTALLATION F INSTALLATION G ...

Page 14: ... of furnace cabinet with the two screws provided Mount the conduit assembly from the junction box to the thermostat bracket Crimp the two female terminals to each of the wire leads Plug the wires to the thermodisc NOTE It does not matter which of the two wires plugs to which terminal on the thermodisc 3 Remove blowers from cartons Remove junction box cover Attach clip nuts as in figure shown Insta...

Page 15: ...trician It is recommended to connect the furnace to its own 15 amp 120 Volt circuit from the house power supply NOTE Wire leads from the distribution blower are usually BOTH BLACK Makes no difference which leads from the motor s connects to the corresponding leads coming out of the conduit ...

Page 16: ...hould be double or triple wall pipe to ensure proper draft The chimney must exceed any part of the building or other obstruction within a 10 3 04m distance by a height of 2 0 6m Installation of an interior chimney is always preferable to an exterior chimney The interior chimney will be hotter than an exterior chimney that is being cooled by the ambient air outside the house Therefore the gas which...

Page 17: ... a professional Make sure there are no cracks loose mortar or other signs of deterioration and blockage Have the chimney cleaned before the furnace is installed and operated When connecting the furnace through a combustible wall to a masonry chimney special methods are needed as explained in the Combustible Wall Chimney Connector Pass Throughs Section ...

Page 18: ...ector and a minimum 24 gauge ventilated wall thimble which has two air channels of 1 25 4 mm each construct a wall pass through There shall be a minimum 6 152 4 mm separation area containing fiberglass insulation from the outer surface of the wall thimble to wall combustibles Support the wall thimble and cover its opening with a 24 gauge minimum sheet metal support Maintain the 6 152 4 mm space Th...

Page 19: ...upper end of the section toward the chimney Any installation with a horizontal run of furnace pipe must conform to NFPA 211 You may contact NFPA National Fire Protection Association and request the latest edition of the NFPA Standard 211 To insure a good draft the total length of the furnace pipe should never exceed 8 to 10 2 4m to 3 04 m Except for cases of vertical installation cathedral roof st...

Page 20: ...same manufacturer and install the ceiling support package or wall pass through and T section package firestops where needed insulation shield roof flashing chimney cap etc Maintain proper clearance to the structure as recommended by the manufacturer The chimney must be the required height above the roof or other obstructions for safety and proper draft operation ...

Page 21: ...ready to burn is to check the piece ends If there are cracks radiating in all directions from the center then the wood should be dry enough to burn If your wood sizzles in the fire even though the surface is dry it may not be fully cured and should be seasoned longer Your furnace was designed to burn wood only no other materials should be burned Waste and other flammable materials should not be bu...

Page 22: ...D only The wood should have dried for 9 to 15 months such that the humidity content in weight is reduced below 20 of the weight of the log It is very important to keep in mind that even if the wood has been cut for one two or even more years it is not necessarily dry if it has been stored in poor conditions Under extreme conditions it may rot instead of drying This point cannot be over stressed th...

Page 23: ...he first four hours of operation Never open the air control more than necessary to achieve a medium burn rate Make sure that there s enough air circulation while curing the furnace DO NOT connect your furnace to the ductwork during this curing process The odors could be smelled during the 3 or 4 first fires Never start your furnace outside You will not be able to see if you are over heating LIGHTI...

Page 24: ...door very slowly Then bring the red embers to the front of the furnace and reload the unit For optimal operation of your wood furnace we recommend you to operate it with a wood load approximately equivalent to the 3 4 of the height of fire bricks It is important to note that wood combustion consumes ambient oxygen in the room In the case of negative pressure it is a good idea to allow fresh air in...

Page 25: ...alter this setting or otherwise operate this wood heater in a manner inconsistent with operating instructions in this manual VISIBLE SMOKE The amount of visible smoke being produced can be an effective method of determining how efficiently the combustion process is taking place at the given settings Visible smoke consist of unburned fuel and moisture leaving your stove Learn to adjust the air sett...

Page 26: ...combustion maximum efficiency and security To change the door gasket simply remove the damaged one Carefully clean the available gasket groove apply a high temperature silicone sold for this purpose and install the new gasket You may light up your stove again approximately 24 hours after having completed this operation This unit s feed door uses a 3 4 diameter rope gasket This unit s ash door uses...

Page 27: ...oor air tight once a year in order to insure good control over the combustion maximum efficiency and security To change the door gasket simply remove the damaged one Carefully clean the available gasket groove apply a high temperature silicone sold for this purpose and install the new gasket You may light up your furnace again approximately 24 hours after having completed this operation PAINT Only...

Page 28: ...NTS WILL VOID THE WARRANTY Key Part No Description Qty 1 27312 Side Panel 2 2 891214 Stub Collar 8 2 3 27322 Top Panel 1 4 27329 Cabinet Back 1 5 26761 Hearth Plate 1 6 26765 Air Wash Plate 1 7 27325 Air Divider 2 8 88057 Ash Pan Door Thermocord 1 2 20 Key Part No Description Qty 9 40627 Heat Exchange Door 1 10 892351 Exchange Handle 1 11 27327 Air Damper 1 12 26866 Door Latch 1 13 892503 Damper H...

Page 29: ... APPLIANCE MANUFACTURER USE OF THIRD PARTY COMPONENTS WILL VOID THE WARRANTY 1 2 3 4 5 6 7 8 9 Key Part No Description Qty 1 891135 HANDLE SPRING LG NICKEL 1 2 892347 DOOR HANDLE 1 3 40603 CAST DOOR 1 4 88082 THERMOCORD 3 4 50 5 88087 GLASS GASKET 1 x 1 8 1 6 892346 DOOR GLASS 1 7 26848 WINDOW CLAMP 1 8 26856 DOOR COVER PLATE 1 REPLACEMENT PARTS ...

Page 30: ...TY 9 4 5 7 10 11 8 3 2 6 12 1 Key Part No Description Qty 1 27312 Side Panel 2 2 891414 Half Firebrick 1 3 26596 Firebrick Notched 4 1 2 X 9 2 4 88213 Side Blanket 2 5 89066 Firebrick 4 1 2 X 9 34 6 24103 Firebrick Half 4 1 2 X 4 1 2 1 7 88212 Base Blanket 1 8 40561 Ash Plug 1 9 88210 Baffle Board 2 10 86757 Tube Air Secondary 125 Holes 4 11 83874 1 8 Dia X 1 1 2 Cotter Pin 4 12 26945 Brick Retain...

Page 31: ...ID THE WARRANTY 1 2 4 5 6 9 8 7 10 11 3 Key Part No Description Qty 1 68234 ASSY BLOWER T STAT BRKT 1 2 68231 1 FAN CNTRL CORD ASSY 1 3 80131 4 x 4 JUNCTION BOX 1 4 80232 SUPPLY CORD 1 5 68231 2 FAN CNTRL CORD ASSY 1 6 80230 BLOWER ASSEMBLY 2 7 89319 BLOWER GASKET 2 8 68231 3 FAN CNTRL CORD ASSY 1 9 22140 CONTROL MOUNTING BRACKET 1 10 80314 F120 THERMODISC 1 11 80231 COVER JUNCTION BOX 1 REPLACEME...

Page 32: ...32 NOTES ...

Page 33: ...33 NOTES ...

Page 34: ...ber which is on the nameplate attached to the stove 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________________________________ 4 The serial number ________________________________ United States Stove Company 227 Industrial Park Roa...

Page 35: ...__ Reason for Purchase Alternative Heat Main Heat Source Decoration Cost Other _________________________ What was the determining factor for purchasing your new USSC appliance _______ I have read the owner s manual that accompanies this unit and fully understand the Installation Operation and Maintenance of my new USSC appliance Print Name Signature Date Please attach a copy of your purchase recei...

Page 36: ... CUT HERE CUT HERE Fold Here Fold Here United States Stove Company P O Box 151 South Pittsburg TN 37380 Fold Here PLACE STAMP HERE ...

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