Heatilator ST42A Owner's Manual
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Heatilator ST42A Owner's Manual

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INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
Contact your dealer with questions on installation, operation, or service.
NOTICE:
DO NOT discard this manual!
Model(s):
WOODBURNING FIREPLACE
Installation and service of this appliance should be performed by
Owner's Manual
Operation and Care
Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.
• DO NOT store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
• DO NOT overfire. Overfiring will void your
warranty.
• Comply with all minimum clearances to com-
bustibles as specified. Failure to comply may
cause house fire.
WARNING
HOT SURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
fireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
WARNING
Fire Risk.
For use with solid wood fuel only.
Other fuels may overfire and generate
poisonous gases (i.e. carbon monoxide).
1

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Summary of Contents for Heatilator ST42A

  • Page 1 Installation and service of this appliance should be performed by WARNING Fire Risk. For use with solid wood fuel only. Other fuels may overfire and generate poisonous gases (i.e. carbon monoxide). Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 2: Table Of Contents

    C. Fuel 1. Hardwood vs. Softwood 2. Moisture content 3. Seasoning 4. Storing Wood 5. Burning Process 6. Creosote Formation 7. Processed Solid Fuel Firelogs D. First Fire Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 3: Welcome

    AVERTISSEMT:RISQUE DE DOMMAGE PARINCENDIE, REMPLACEZ LA GRILLE AVEC HEARTH & HOME TECHNOLOGIES IF INSTALLATION OR OPERATING INSTRUCTIONS ARE MISSING CONTACT: HEARTH & HOME TECHNOLOGIES, 7571 215th Street West, Lakeville, MN 55044. P.N. 4021-954C Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 4: Limited Lifetime Warranty

    Firebox and heat exchanger, FlexBurn® System 3 years Lifetime (engine, inner cover, access cover and fireback) None 1 Year All purchased replacement parts Page 1 of 2 4021-645M 9/21 Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...
  • Page 5 EXPRESSED WARRANTY SPECIFIED ABOVE FOR THE APPLICABLE PRODUCT. Some States do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. Page 2 of 2 4021-645M 9/21 Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 6: Product Specific And General Information

    WARNING! Do Not operate an unvented gas log set in this Warning! Risk of Fire! fireplace with the chimney removed. For use with solid wood fuel only. Other fuels may overfire and generate poisonous gases (i.e. carbon monoxide). Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 7: Important Safety And Operating Information

    State of California to cause birth defects Clear Space Sides of Fireplace Opening or other reproductive harm. For more infor- mation go to: www.P65Warnings.ca.gov. Figure 3.1 Clear Space Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 8: Grate

    If doors are left partly open, gas and flame may be drawn out of the fireplace opening. Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 9: General Operating Parts

    WARNING! DO NOT operate fireplace before reading and understanding operating instructions. Failure to operate fire- place according to operating instructions could cause fire or injury. Air Kit Handle Location open (just above stone) close Damper Handle Figure 3.2 General Operating Parts Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 10: Flue Damper

    Operating Positions of Bi-fold Doors • Douglas Fir • Oak • Pine • Maple • Spruce • Apple • Cedar • Birch • Poplar • Aspen • Alder Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 11: Moisture Content

    Avoid covering the sides and ends completely. Doing so may trap moisture from the ground and impede air circulation. Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 12: Burning Process

    D. First Fire Before lighting your first fire in the fireplace, make certain that: • refractory is in place • all labels have been removed Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 13: Maintenance And Service

    Section TR11/TR11T TCT1175 ST1175 TR444/TR442 Terra Cotta ST475 Round Termination Cap Square Termination Cap Termination Cap Available US only Figure 4.1 Chimney & Termination Cap Cleaning DT SERIES Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 14: Grate

    F. Refractory/Firebrick Frequency: Tools Needed: • Inspect condition of brick. Replace if crumbly or otherwise deteriorated, or if cracks exceed 1/4 in. (6 mm). Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 15: Troubleshooting

    Add glass doors to slow down air flow. Overdrafting Check for correct vent height; too much vertical height creates overdrafting. Check location of vent termination (refer to chimney assembly section). Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 16: Faqs

    Visit www.heatilator.com to find a dealer. Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...
  • Page 17 Creosote buildup in flue? Air register from furnace near fireplace? Doors opening and closing? Outside air Window closed Combustion closed? for start-up? air control Figure 5.1 Factory-built Fireplaces: Troubleshooting Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 18: Reference Materials

    Reference Materials ► A. Service Parts Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 19: Accessories

    B. Accessories Doors DM1242 Bi-fold Doors with Black Trim DM1242S Bi-fold Doors with Stainless Steel Trim Gas Log Sets Gas Log Lighters Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

  • Page 20: Contact Information

    6769426, 6774802, 6796302, 6840261, 6848441, 6863064, 6866205, 6869278, 6875012, 6880275, 6908039, 6919884,7047962, 7216645, D320652, D445174, D462436; (Canada) 1297749, 2195264, 2225408, 2313972; (Australia) 780250, 780403, 1418504 or other U.S. and foreign patents pending. Printed in U.S.A. - Copyright 2012 Heatilator • ST42A Owner Manual • 4012-050 • Rev K • 02/22...

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