DAKA 521FB Manual
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DAKA 521FB Manual

Wood-burning furnace
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MODEL 521FB
WOOD-BURNING FURNACE MANUAL
Manufactured in the U.S.A. by
DAKA CORPORATION
955 Industrial Street NE
Pine City, Minnesota 55063
Phone: 320-629-6737  Fax: 320-629-3677
www.dakacorp.com
DAKA 521FB Manual
Page 1 of 32
January 2009
Rev. 2, June 2012

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  • Page 1 MODEL 521FB WOOD-BURNING FURNACE MANUAL Manufactured in the U.S.A. by DAKA CORPORATION 955 Industrial Street NE Pine City, Minnesota 55063 Phone: 320-629-6737  Fax: 320-629-3677 www.dakacorp.com DAKA 521FB Manual Page 1 of 32 January 2009 Rev. 2, June 2012...

  • Page 2: Limited Warranty

    DAKA Corporation will repair or replace defective components, at our option, at no charge for parts and labor, and will pay freight charge for one-way shipment for warranty claims during the first year. In second and subsequent years, only parts and labor will be provided at no charge.

  • Page 3: Table Of Contents

    B. Operating Controls: Snap Disc Fan Control & Automatic Damper Control C. Emergency XII. MAINTENANCE INSTRUCTIONS ................28 XIII. TROUBLESHOOTING ....................29 XIV. PARTS LIST & EXPLODED VIEW ................30 DAKA 521FB Manual Page 3 of 32 January 2009 Rev. 2, June 2012...

  • Page 4: Features

    521FB furnace. NOTE: Return Cold Air Filter Box included but not shown. The filter box improves indoor air quality. DAKA 521FB Manual Page 4 of 32 January 2009 Rev. 2, June 2012...

  • Page 5: Specifications

    IV. SPECIFICATIONS DAKA MODEL 521FB WOOD-BURNING FURNACE SPECIFICATIONS Manufacturer: DAKA Corporation Model: 521FB U.L. Approval: Tested to U.L. Standard 391–March 2010 & Sept. 2010 by WHI Fuel Type: Wood / Coal 44” Height x 24” Width x 25-½” Depth Dimensions: 42,000 –...

  • Page 6: Optional Furnace Accessories

    & fire door with spinner knob. 253 - FORCED DRAFT CONVERSION KIT Adds convenience of living area control of heat output of Deluxe models 521FB and 621, many earlier models. Kit includes 35-cfm draft blower, wall thermostat, transformer/relay, controls, wiring and instructions.
  • Page 7 Inspect and clean flues and chimney regularly. CAUTION: Turn off all power to furnace before cleaning. WARNING: Do not operate furnace while under the influence of drugs or alcohol. DAKA 521FB Manual Page 7 of 32 January 2009 Rev. 2, June 2012...

  • Page 8: Vi. General Wood-Burning Safety ................................................................... 7

    MAY RESULT. FOR YOUR SAFETY, CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT PERMITS, RESTRICTIONS AND INSTALLATION REQUIREMENTS FOR YOUR AREA. REFER TO MARKING ON APPLIANCE FOR ADDITIONAL INFORMATION. DAKA 521FB Manual Page 8 of 32 January 2009 Rev. 2, June 2012...

  • Page 9: Checking Shipment

    MISSING OR DAMAGED PARTS PLEASE DO NOT RETURN THE PRODUCT TO THE STORE WHERE PURCHASED. CALL DAKA CORPORATION DIRECTLY. 1-800-884-3252 Monday through Friday 8:00 AM to 4:30 PM Central Time It is our goal to send replacement parts to you immediately after we receive your order.

  • Page 10: Planning Your Installation

    Read through the entire manual before beginning your installation. Follow all steps 1) FLOOR PROTECTION exactly. Your Model 521FB Furnace can be 1. This furnace must be installed on a non- installed as a supplementary/Add-on Furnace combustible floor surface such as solid or as a free-standing central furnace with its concrete or 3/8”...

  • Page 11: Chimney

    To obtain higher heat levels, move the weight away from the gate to increase the setting. [An optional DAKA barometric regulator #283 may be used in the chimney connector to help increase furnace efficiency by maintaining a consistent draft. See FIGS. 5 & 6 on page 12.]...
  • Page 12 This furnace must be connected to a minimum 6” listed Type HT (High Temp) appliance-type chimney or a code-compliant tile-lined masonry chimney. Connection to a chimney flue serving another appliance is prohibited. DAKA 521FB Manual Page 12 of 32 January 2009 Rev. 2, June 2012...

  • Page 13: Supplementary/Add-On

    See FIG. 7. Air can be provided to the DAKA furnace through the same cold air return line that is used by the primary furnace. This will require installation of an air line between the cold air filter box and the cold air return line of the primary furnace.

  • Page 14: Viii. Planning Your Installation

    The 550-cfm blower provided is often sufficient to provide air distribution for smaller homes with short duct runs. A second optional 550-cfm blower (DAKA #273), or a large side-mounted multi-speed blower & filter box (DAKA #218), may be required for larger homes with longer ductwork (available online at www.dakacorp.com).

  • Page 15: Assembly Instructions

    NOTE: Ash pan is open-ended scoop design from moving. for easy emptying of ash pan. Fire Door FIG. 11 Ash Pan DAKA 521FB Manual Page 15 of 32 January 2009 Rev. 2, June 2012...
  • Page 16 Place one side edge down on support rail. Drop other side down. Grate should lie flat on both side support rails. FIG. 12 Auto Damper Cast Iron Grate  Grate  FIG. DAKA 521FB Manual Page 16 of 32 January 2009 Rev. 2, June 2012...
  • Page 17 Open fire door and carefully feel for two (2) steel hooks above door opening. With bent edge facing inward, hang swing plate from hooks. See FIG. 15. DAKA 521FB Manual Page 17 of 32 January 2009 Rev. 2, June 2012...
  • Page 18 (2) No. 12 x ½” screws onto left side of furnace in inner pre-punched holes located within the junction box.  Outside Wiring NOTE: Make sure Fan Control is flush against furnace air jacket panel. DAKA 521FB Manual Page 18 of 32 January 2009 Rev. 2, June 2012...
  • Page 19 5. Connect green ground wires together. 6. Check all connections for tightness and electrical safety. 7. Coil all wires within junction box. 8. Install 4” square Junction box cover plate. DAKA 521FB Manual Page 19 of 32 January 2009 Rev. 2, June 2012...

  • Page 20: Cold Air Return Filter Box

    2. Next, attach side panel B (Key 4) and side panel C (Key 5) to bottom panel (Key 2). 3. With blower and wiring already installed on DAKA furnace, the next step is to loosen, but not remove, all four screws holding the fan hole cover plate. (See FIG. 2).

  • Page 21: Installation

    The 90° degree elbow within the supply plenum forms a venturi. This is used to extract air from the DAKA furnace when the primary furnace blower comes on. The absence of this elbow will cause back pressure down the warm air pipe to the DAKA furnace. This will adversely affect the heat distribution and possibly damage the DAKA furnace.
  • Page 22 From there, the primary blower will turn on as heat is received from the DAKA furnace. A fan control will have to be installed, wiring it in parallel with the primary blower fan control at the heat exchanger level.
  • Page 23 X. INSTALLATION A3. ALTERNATIVE CONNECTION OPTIONS DAKA 521FB Manual Page 23 of 32 January 2009 Rev. 2, June 2012...

  • Page 24: Connecting To Chimney

    24-ga. or heavier, to rear smoke outlet home to help clear the odor. collar on DAKA furnace. The collar is sized so that the crimped end of a standard 6” stove pipe Heat reclaimers, fins or the like should not be will fit inside collar.

  • Page 25: X. Installation

    X. INSTALLATION B. CONNECTING TO CHIMNEY (cont’d) DAKA 521FB Manual Page 25 of 32 January 2009 Rev. 2, June 2012...

  • Page 26: Operating Instructions

    The snap disc fan control (mounted in the J-box FILL ABOVE THE TOP OF THE FIREBRICK. extension ring on the side of the DAKA furnace) is designed to turn on the 550-cfm lift blower on With the fire now burning, make sure to close...
  • Page 27 If you are burning coal, you must have a coal slightly to aid in starting a fire is permissible, but burning grate (DAKA Part #238) and a fire door with never for more than a few minutes. a spinner knob (DAKA Part # 34200). Both are available at your local dealer or through the DAKA factory at www.dakacorp.com.

  • Page 28: Maintenance Instructions

    TOP VIEW OF AUTO DAMPER FURNACE BLOWER/S The 550-cfm blower is self-lubricating and does not require oiling. Clean the blower impellers every 6 months using compressed air. DAKA 521FB Manual Page 28 of 32 January 2009 Rev. 2, June 2012...

  • Page 29: Troubleshooting

    1. Burning too cool of a fire. Refer to XII. Maintenance, page 28. Creosote Formation 2. Auto Damper setting too low. DAKA 521FB Manual Page 29 of 32 January 2009 Rev. 2, June 2012...

  • Page 30: Parts List & Exploded View

    63610004 Instructions (A) 66700020 Cold Air Filter Box, Single A = Large Parts Bag #36200 B = Small Parts Bag #36210 All other parts are separate components DAKA 521FB Manual Page 30 of 32 January 2009 Rev. 2, June 2012...
  • Page 31 XIV. PARTS LIST & EXPLODED VIEW THIS PAGE LEFT BLANK INTENTIONALLY. DAKA 521FB Manual Page 31 of 32 January 2009 Rev. 2, June 2012...
  • Page 32 LEARN MORE ABOUT DAKA FURNACES BY VISITING WWW.DAKACORP.COM  Order Optional Accessories  Order Replacement Parts  Watch Videos on Installation, Operation & Maintenance  Download Manuals  Contact Us with Questions or Comments DAKA 521FB Manual Page 32 of 32 January 2009 Rev.

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