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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 x x Fax: 320-629-3677 www.dakacorp.com DAKA 521FB Manual Page 1 of 31 January 2009 Rev. 1, June 2011...
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.
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 31 January 2009 Rev. 1, June 2011...
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 31 January 2009 Rev. 1, June 2011...
& 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.
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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 31 January 2009 Rev. 1, June 2011...
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 31 January 2009 Rev. 1, June 2011...
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.
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”...
[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.] DAKA 521FB Manual Page 11 of 31 January 2009...
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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 31 January 2009 Rev. 1, June 2011...
Installation of these back-draft dampers is to prevent overheating. We recommend that once the units are operating that both units be monitored to make sure that neither is overheating. FIG. 7 DAKA 521FB Manual Page 13 of 31 January 2009...
A second optional 550-cfm blower, or a single 1580-cfm side mounted blower, may be required for larger homes with longer ductwork (available online at www.dakacorp.com). CAUTIONARY NOTE: DO NOT USE AS A FREE-STANDING RADIANT HEATER. FIG. 8 DAKA 521FB Manual Page 14 of 31 January 2009 Rev. 1, June 2011...
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 31 January 2009 Rev. 1, June 2011...
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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 31 January 2009 Rev. 1, June 2011...
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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 31 January 2009 Rev. 1, June 2011...
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(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 31 January 2009 Rev. 1, June 2011...
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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 31 January 2009 Rev. 1, June 2011...
9. If a cold air return line is to be installed, a minimum of a 13 ¼” x 13 3/8” must be used. 10. Furnace Filter: Use size 14 x 20 x 1 paper filter (side may be cut to fit width of filter box). DAKA 521FB Manual Page 20 of 31 January 2009 Rev.
DAKA furnace. This will adversely affect the heat distribution and possibly damage the DAKA furnace. If space prohibits installation of 90° degree elbow as recommended, look for alternate designs shown in FIG. 20 or on Page 23. DAKA 521FB Manual Page 21 of 31 January 2009...
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NOTE: The No. 273 twin blower conversion kit requires a No. 258 dual blower cold air return filter box. IMPORTANT: The plenums installed to the furnaces must be of metal construction. DAKA 521FB Manual Page 22 of 31 January 2009...
Limit the use of 90°elbows in any chimney connector as they adversely affect draft. If 90° elbows must be used, do not install more than two in any chimney connector. DAKA 521FB Manual Page 24 of 31 January 2009 Rev. 1, June 2011...
Most problems associated with creosote are seen in the fall and spring times of the year. It is at this time when most people do not need DAKA 521FB Manual Page 26 of 31 January 2009 Rev. 1, June 2011...
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