HearthStone Clydesdale 8491

Questions and Answers

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Dylan RiceJul 31, 2025
How to stop my HearthStone Clydesdale 8491 Indoor Fireplace insert from smoking?
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  Richard ClarkJul 31, 2025
  If the HearthStone Indoor Fireplace insert smokes, ensure proper operation by fully opening the primary air control one minute before opening the door and then opening the front door slightly until the firebox clears of smoke before fully opening it. Other causes may include a cold chimney (preheat when starting), reverse draft (turn off exhaust fans and open a window), blocked flue (examine for blockage or creosote), oversized chimney (reline to correct diameter), undersized chimney (install a draft inducer or replace chimney), chimney too short (lengthen it), incorrect installation (ensure proper flue liner connection), air infiltration into chimney (seal connections), or more than one appliance connected to the flue (disconnect others and seal openings).
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Jacob SmithAug 5, 2025
What to do if my HearthStone Clydesdale 8491 Indoor Fireplace is back-puffing or having gas explosions?
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  Timothy OchoaAug 5, 2025
  If you experience back-puffing or gas explosions with your HearthStone Indoor Fireplace, ensure proper operation by fully opening the primary air control one minute before opening the door, and keep it open for a few minutes after reloading. Also, maintain a higher burn rate and never use accelerants to start or invigorate the fire. Other potential causes include chimney down-draft (install a chimney cap and check the chimney installation), and excessive ash build-up (empty ashes more frequently).
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Dr. Dillon ReeseAug 10, 2025
Why does my HearthStone Indoor Fireplace have an uncontrolled or short burn?
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  qdavisAug 11, 2025
  If your HearthStone Indoor Fireplace has an uncontrolled or short burn, check that the door is sealed tightly, replacing gaskets if necessary. Ensure the primary air control is operating correctly, noting that the shutter is not designed to close completely. Deteriorated gasket seals should be resealed. Other causes may include an extra-long chimney (shorten or install a damper), high winds (install a chimney cap), oversized chimney (reline to the proper diameter), or over-fire damage (inspect and replace damaged components).
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todd95Aug 15, 2025
How to increase heat output from my HearthStone Clydesdale 8491?
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  ruben66Aug 15, 2025
  If your HearthStone Indoor Fireplace isn't producing enough heat, use only air-dried wood that has been dried for at least one year and operate the insert at a higher burn rate. Other potential causes include a blocked flue (check for blockage or creosote), an air-insulated chimney (replace with a pre-fabricated insulated system or properly sized and lined masonry chimney), a cold exterior chimney (reline or insulate it), a leaky flue connector or chimney liner (check the installation), or too much heat loss from the house (caulk windows, seal openings, and increase energy efficiency).
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John BenitezAug 20, 2025
How to prevent dirty glass on my HearthStone Indoor Fireplace?
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  Oscar CraneAug 20, 2025
  If the glass on your HearthStone Indoor Fireplace gets dirty, use only air-dried wood, preferably dried for at least one year, and operate the fireplace insert at a higher burn rate. Also, check the installation of the flue connector and chimney liner to ensure they are securely attached.
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james40Aug 25, 2025
What to do if the enamel casting is blistering on my HearthStone Indoor Fireplace?
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  Joshua CurryAug 26, 2025
  If you notice blistering of the enamel casting on your HearthStone Indoor Fireplace, avoid over-firing the insert by monitoring temperatures and only using seasoned cord wood. Other causes may include excessive draft (check gasket seals and chimney height, and install a flue damper/restrictor or chimney cap).

Summary

Introduction and Codes

Codes

Adherence to national codes for safe installation and operation.

Safety Information

General Safety Precautions

Crucial warnings for installation, operation, and handling of the fireplace insert.

Periodic Checklist

Weekly and Monthly Checks

Tasks for maintaining the fireplace insert, including ash removal and seal checks.

Emergency Procedures

Fire Response and Removal

Steps to handle chimney fires and safe insert removal procedures.

Specifications

Product Specifications Overview

Technical details including heat output, dimensions, weight, and materials.

Installing Your Wood Fireplace Insert

Unpacking and Initial Inspection

Instructions for safely unpacking and inspecting the fireplace insert for damage.

Pre-Installation Preparation

Steps including attaching labels and ensuring clearances before installation.

Hearth and Floor Protection

Hearth Requirements

Specifies non-combustible flooring, R-value, and extension requirements.

Clearances to Combustibles

Clearance Requirements

Details clearances to NFPA 211 protected surfaces and combustibles.

Installing the Insert

Removing the Clydesdale from the Pallet

Instructions for safely removing the insert from its shipping pallet.

Installing the Wooden Knob

Guide for attaching the door latch knob assembly to the fireplace insert.

Measuring Fireplace Cavity and Flue Collar Position

Determining the correct flue collar position based on fireplace opening depth.

Adjusting the Flue Collar Position

Flue Collar Adjustment Procedure

Steps to change the flue collar from aft to forward position for installation.

Baffle and Plenum Installation

Removing the Baffle;Plenum

Instructions for removing the baffle/plenum assembly for flue collar access.

Leveling and Stone Installation

Leveling the Insert

Using leveling bolts to ensure the insert is properly positioned and stable.

Installing Soapstone Refractory Pieces

Guide for placing the soapstone stones within the firebox.

Installing the Surround

Surround Installation Guide

Refers to separate instructions for assembling and installing the surround panels.

Removing and Reversing the Door

Door Removal Procedure

Step-by-step guide for removing the fireplace insert door.

Reversing the Door Swing

Instructions to change the door from right-opening to left-opening.

Removing the Ash Lip Cover and Façade

Removing the Ash Lip Cover

Steps to loosen set screws and remove the ash lip cover.

Removing the Façade

Instructions for removing the front façade after the ash lip cover is removed.

Blower Power Cord Routing

Routing the Power Cord to the Right Side

Steps to relocate the blower power cord from left to right side.

Venting Components and Configuration

Installing a Venting System

Guidelines for connecting the insert to the venting system securely.

Connecting to a Prefabricated Metal Chimney

Requirements for installing with a factory-built metal chimney system.

Masonry Chimney Requirements

Connecting to a Masonry Chimney

Requirements for professional inspection and connection to a masonry chimney.

Chimney Wall and Flue Liner Requirements

Specifications for chimney construction, flue liner thickness, and mortar.

Chimney Height Requirements

Guidelines for minimum and maximum chimney height for optimal draft.

Operation

Operating the Blower

How the pre-installed blower functions and its speed control.

Choosing Firewood

Guidance on selecting appropriate natural firewood for optimal burning.

Firewood and Baffle System

Firewood BTU Content and Moisture

Information on wood species, BTU content, and seasoning requirements.

Hearthstones Thermo-Ceramic Baffle System

Explanation of the baffle system's function and care instructions.

Breaking in Your Fireplace Insert

Breaking in Your Wood Fireplace Insert

Crucial steps for the initial fires to season the insert and prevent damage.

Building a Break-in Fire

Detailed instructions for the first fires to properly season the insert.

Efficient Operation and Burn Rates

Operating Your Insert Efficiently

Tips for maximizing heat output and minimizing creosote buildup.

Burn Rate Management

Guidance on high, medium, low, and overnight burn rates for performance.

Building a Fire for Everyday Use

Step-by-step guide for starting and maintaining a regular fire.

Disposal of Ashes

Safe Ash Disposal

Procedures for safely collecting and storing ashes before final disposal.

Over-Fire Caution

Understanding and Avoiding Over-Firing

Warnings about operating temperatures, causes, and consequences of over-firing.

Maintenance

Creosote Formation and Removal

Information on creosote buildup, its risks, and prevention methods.

Gasket Inspection and Replacement

Guidance on checking and replacing door gaskets for a proper seal.

Cleaning the Glass

Instructions for safely cleaning the fireplace insert glass.

Glass Replacement

Glass Replacement Procedure

Detailed steps for removing and replacing the door glass.

Cast Iron Care

Maintaining Cast Iron Surfaces

Tips for touching up paint and cleaning cast iron parts.

Blower System Maintenance

Blower System Cleaning and Inspection

Instructions for periodic cleaning and inspection of the blower assembly.

Troubleshooting

Basic Heating Issues

Common problems affecting heating performance and their causes.

Draft Factors and Issues

Explains wind, pressure, fire briskness, and seasonal effects on draft.

Troubleshooting Guide

Insert Smokes and Back-Puffing

Solutions for common causes of smoke spillage and gas explosions.

Insufficient Heat and Dirty Glass

Troubleshooting steps for low heat output and dirty glass issues.

Blistering of Enamel Casting

Addressing issues related to enamel casting damage, often due to over-firing.

Replacement Parts & Optional Accessories

Castings and Parts List

Comprehensive list of replacement parts, including part numbers.

Optional Kits and Accessories

Information on available kits like surround kits and screen kits.

Safety Label

Understanding Safety Label Information

Details on warnings, clearances, and product certifications from the safety label.

Limited Warranties

Warranty Coverage Details

Outlines lifetime, five-year, and one-year warranties for various parts.

Warranty Exclusions

Excluded Damages and Conditions

Lists conditions and damages not covered by the manufacturer's warranty.

Limitations and State Law Variations

Information on warranty disclaimers, implied warranties, and state-specific laws.

Warranty Remedy and Registration

Warranty Repair and Replacement Process

Describes the procedure for obtaining warranty service and parts.

Warranty Registration Procedure

Instructions on how to register the product for warranty coverage.