HearthStone Hergom Clydesdale User manual

Hearthstone Quality Home Heating Products Inc ® Clydesdale Model 8490
Manual: 6400-40446
Revised: 9/26/2008
Clydesdale
(Model 8490)
Non-Catalytic Wood
FireplaceInsert
OWNER'S MANUAL
INSTALLATION AND OPERATING
INSTRUCTIONS
PLEASE READ THIS ENTIRE OWNER’S MANUAL BEFORE YOU INSTALL AND USE
YOUR NEW Clydesdale WOOD FIREPLACE INSERT. To reduce the risk of fire, follow
the installation instructions. Failure to follow these instructions may result in property
damage, bodily injury, or even death.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE!
CONTACT LOCAL AUTHORITIES HAVING JURISDICTION (BUILDING DEPARTMENT
or FIRE OFFICIALS) ABOUT PERMITS REQUIRED, RESTRICTIONS AND
INSTALLATION INSPECTION IN YOUR AREA.

1
TABLE OF CONTENTS
INTRODUCING YOUR CLYDESDALE WOOD FIREPLACE INSERT........................................ 2
CODES...................................................................................................................................................... 3
SAFETY INFORMATION ............................................................................................................................. 3
SPECIFICATIONS ....................................................................................................................................... 5
SETTING UP YOUR CLYDESDALE WOOD FIREPLACE INSERT............................................. 6
UNPACKING ............................................................................................................................................. 6
INSTALLING YOUR FIREPLACE INSERT..................................................................................................... 6
HEARTH REQUIREMENTS AND FLOOR PROTECTION ................................................................................ 6
Venting Components and Configuration ........................................................................................ 9
Connecting to a Prefabricated Metal Chimney............................................................................... 9
Connection To A Masonry Chimney............................................................................................ 12
OPERATING YOUR CLYDESDALE WOOD FIREPLACE INSERT........................................... 13
CONTROLS AND FEATURES.................................................................................................................... 13
CHOOSING FIREWOOD............................................................................................................................ 13
BUILDING AFIRE................................................................................................................................... 14
BREAKING IN YOUR WOOD FIREPLACE INSERT ..................................................................................... 14
MAINTENANCE ................................................................................................................................. 16
TROUBLESHOOTING........................................................................................................................ 18
SAFETY LABEL....................................................................................................................................... 21

2
Introducing Your
Clydesdale Wood Fireplace Insert
Congratulations! You have just invested in a most unique
wood burning Fireplace Insert – the Clydesdale Wood
Burning Fireplace Insert from HearthStone Quality Home
Heating Products Inc®. The Clydesdale Model –8490 is
a clean burning EPA certified, non-catalytic wood
burning Fireplace Insert. You can be proud to join the
HearthStone family with our Premier Cast Iron Wood
Burning Fireplace Insert. The generous depth and width
allows for loading of wood through the front door up to
22 inches long!
Your purchase insures years of clean, comfortable heat
with minimal maintenance. You will receive the benefits
of the most advanced technology in wood burning without
the cost and maintenance requirements of a catalytic
Fireplace Insert. The Clydesdale blends modern
technology with the unique beauty and heating qualities
of soapstone and cast iron, long known for its even heat
production and long heat-retaining ability. We trust that
you will appreciate the quality of our handcrafted product.
Please read this manual in its entirety. Its purpose is to
familiarize you with your Fireplace Insert's safe
installation, proper break-in, operation and maintenance.
It contains information that will be useful to you now, and
in years to come, so keep it handy and refer to it as
needed.
Use these instructions as well as national, state, and local
building codes to install your Fireplace Insert. Be sure to
maintain the designated stovepipe and Fireplace Insert
clearances to walls, ceilings, hearth, and other
combustible surfaces. This will help reduce the risk of
fire. Failure to follow these instructions can result in
property damage, bodily injury, and even death.
Keep furniture, drapes, curtains, wood, paper, and other
combustibles far away from the Fireplace Insert. Never
install the Fireplace Insert in a location where gasoline,
kerosene, charcoal lighter fluid or other flammable liquids
are used or stored.
SAFETY NOTICE:
A HOUSE FIRE MAY RESULT IF THIS
FIREPLACE INSERT IS NOT INSTALLED
PROPERLY. FOR YOUR SAFETY,
CAREFULLY FOLLOW THE
INSTALLATION DIRECTIONS.
CONTACT LOCAL BUILDING OR FIRE
OFFICIALS ABOUT RESTRICTIONS
AND INSTALLATION INSPECTION IN
YOUR AREA.
The performance of your Fireplace Insert depends on
many variables. Since all installations are unique, the
general information and operating procedures presented
here can only serve as useful guidelines rather than hard
and fast rules. Should you have any questions, do not
hesitate to contact your dealer for additional information.
Validate your warranty - return your warranty registration
card to HearthStone within 30 days of purchase. Once
your warranty has been validated by returning your
warranty card, contact your dealer for any necessary
warranty service.
This Fireplace Insert is manufactured and warranted by:
HearthStone Quality Home Heating Products Inc®
317 Stafford Ave.
Morrisville, VT. 05661

3
CODES
When you install your Clydesdale wood Fireplace Insert,
it is imperative that you adhere to all local codes, which
can be obtained from either of the following two National
sources:
American National Standards Institute, Inc. (ANSI)
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc. (NFPA)
Battery March Park
Quincy, MA 02269
SAFETY INFORMATION
Read and understand this Owner's Manual
thoroughly before installing and using this Fireplace
Insert.
Make sure to install your Fireplace Insert:
According to the manufacturer's recommendations.
In accordance with all applicable codes.
With the proper sized chimney.
When using your Fireplace Insert:
Warn children and others unfamiliar with woodstoves
of the danger of touching hot, radiating surfaces of
your Fireplace Insert. For your additional safety,
obtain hearth and stove guards through your local
dealer.
Follow recommended break-in procedure as outlined
in this manual.
Burn natural wood only. Higher efficiencies and
lower emissions result when burning air-dried,
seasoned wood, as compared to green or freshly cut
wood.
Use caution when loading firewood into a hot stove.
Inspect the stovepipe, chimney connector and
chimney, as recommended.
Follow these safety precautions:
Never modify this Fireplace Insert in any way,
especially the primary air control system.
Never burn kiln dried wood, painted or treated wood,
solvents, trash, plywood, colored or glossy paper,
artificial logs, cardboard, coal, garbage or driftwood.
Especially, do not burn coal in this Fireplace Insert.
Never use gasoline type fuel, kerosene, charcoal
lighter fluid, or other liquid fuels or solid fire starters
to start or invigorate the fire. These fuels can
possibly generate carbon monoxide, which can sap
the supply of oxygen. Keep all such materials away
from the Fireplace Insert.
Never use a wood grate or other device to elevate the
fire.
Do Not allow logs to rest against or otherwise come
in contact with the glass when the door is closed.
Do Not slam the door or use the door to force wood
in to the Fireplace Insert.
Never over-fire your Fireplace Insert
Never put articles of clothing or candles on a hot
Fireplace Insert.
Do Not connect the Fireplace Insert to a flue that is
serving another appliance.
Other safety guidelines
Keep all combustible items such as furniture, drapes,
clothing, and other items, at least 36" (0.92 m) from
the Fireplace Insert
Install a smoke detector, preferably in an area away
from your wood Fireplace Insert.
Keep a fire extinguisher handy. We recommend the
type rated "A B C."
Dispose of ashes properly.
Keep children and pets away from the stove; they
could be burned by touching a hot stove.
Clean your chimney system as needed.

4
PERIODIC CHECKLIST
Perform each of these tasks at the specified intervals.
At the End of Every Week:
•Empty ashes from the firebox (sooner if the firebox
begins to fill up).
At the Beginning of Every Other Month:
•A visual inspection of the chimney connector and
chimney for creosote is recommended depending
upon your use of the stove.
•Check door seals using the "dollar bill test." - When
the fire is out and the stove is cool, shut the door on a
dollar bill. If the bill pulls out without any resistance,
then your stove’s door isn't sealed properly. To
tighten the seal, change the door gasket
At the End of Every Season:
•Dismantle the chimney connector and clean it
thoroughly. Replace any pieces that show signs of
rust or deterioration.
•Inspect and, if necessary, clean your chimney.
•Thoroughly clean out the inside of the Fireplace
Insert.
•Inspect all door gasket material and replace if worn,
frayed, cracked or extremely hard.
EMERGENCY PROCEDURES
If you have a stovepipe or chimney fire, follow these
instructions:
1. If the fire is too threatening, leave the area and call
the fire department immediately! If not, perform the
next two steps.
2. Close the primary air control.
3. Keep the Fireplace Insert door closed!
▌WARNING
DO NOT ATTEMPT TO PUT OUT A STOVEPIPE
OR CHIMNEY FIRE BY THROWING WATER
ONTO THE STOVE, STOVEPIPE, OR
CHIMNEY. THE EXTREMELY HIGH
TEMPERATURE ASSOCIATED WITH SUCH
FIRES CAN CAUSE INSTANTANEOUS STEAM
AND SERIOUS BODILY HARM.
Once the chimney fire has expired, leave the primary air
control closed and let the fire in the Fireplace Insert die
out completely. The Fireplace Insert should not be fired
again until the Fireplace Insert, stovepipe, and chimney
are all thoroughly inspected for any sign of damage. You
must correct any damage before using your Fireplace
Insert again.
To remove the Clydesdale for inspection purposes, simply
disconnect the venting from inside the firebox. Carefully
remove the surround from the insert, and slide the insert
away from the fireplace.

5
SPECIFICATIONS
Maximum Heat Output. 60,000 btus per hour of
cordwood (based on
independent laboratory test
results).
Size of Heated Area. 1,800 square feet.
Firebox Capacity. 2.4 cubic feet or 48 pounds of
wood (The amount and weight
of wood contained per cubic
foot of firebox volume can
vary from 15 to 36 lbs. per
cubic foot depending on type
of wood, moisture content,
packing density and other
factors. As a constant for
comparison and test purposes,
we are assuming 20 lbs. of
seasoned hardwood per cubic
foot of firebox volume).
Maximum Log Length. 22” (55.9 cm) - front door
Height 22.5" (57.2 cm)
Width 31.08” (78.9 cm)
Depth 17.56”(44.6 cm)
Front Door Size 22" wide x 11.5" high
(55.9 x 29.2 cm)
Stovepipe Size 6" (152 mm) diameter
Metal Chimney 6" (152 mm) inside diameter
Masonry Chimney 6” (15.2cm) inside diameter
(round flue)
8” x 8” (20 x 20cm) (square
flue)
Flue Exit Top exit only
Actual Weight 550 pounds
Castings Finish Painted Matte; and Porcelain
Enamel (Blue/Black)
Figure 1 Clydesdale Dimensions

6
Setting up Your Wood
Fireplace Insert
UNPACKING
HearthStone Stoves packages your Clydesdale Fireplace
Insert with the greatest care, so that it ships safely. Under
certain circumstances, however, damage can occur during
transit and handling. When you receive your Fireplace
Insert, unpack it carefully, inspecting your Fireplace
Insert and all parts for damage. Also, make sure that all
parts are included in the box. If any parts are damaged or
missing, please contact your dealer immediately.
INSTALLING YOUR FIREPLACE INSERT
When Installing this unit in a fireplace, you must attach
the metal label provided (3300-625) to the fireplace prior
to installing the insert. To install the tag,
Make sure that the Fireplace Insert will have enough
clearance to combustible materials that would surround
the insert. These combustibles can include walls, floor,
ceiling, fireplace, and chimney. You must carefully
consider the clearances to all of these combustibles before
actually connecting your Fireplace Insert.
Read this chapter to obtain a sound understanding of how
to properly install your Fireplace Insert.
National Fire Protection Agency
Batterymarch Park
Quincy, MA 02269
1-800-344-3555
1-617-770-3000
Figure 2 Minimum Fireplace Dimensions
HEARTH REQUIREMENTS AND FLOOR
PROTECTION
Combustible flooring must be protected with a covering
of noncombustible material (slate, marble tiles, other
noncombustible material can be used for this purpose).
The floor protection must extend beyond the body of the
Fireplace Insert at the minimum as follows and have a
minimum “R-Value” of 1.0.
Hearth must be non-combustible
material with "R-Value" atleast 1.1
From fuel
door
opening
Figure 3 Hearth Requirements
* Installations in Canada require 18” (45.72 cm) of floor
protection in the front.

7
Floor protector’s come with various types of
specifications. To convert a floor protector’s specification
to an R-value, do one of the following:
•If the R-value is given, use that value—no
conversion is needed.
•If a K-factor is given with a required thickness
(T) in inches, use this formula: R-value = 1/K x
T
•If a C-factor is given, use the formula: R-value =
1/C
To determine the R-value of the proposed alternate floor
protector:
•Use either the K-factor or the C-factor formula
explained above to convert specifications not
expressed as R-values.
•For multiple layers of floor protectors, simply
add the R-values of each layer to determine the
overall R-value of the layers.
If the overall R-value of your setup is greater than the
R-value of the specified floor protector, then your setup is
acceptable.
Noncombustible Material Thickness R-value
Gypsum or plaster board11/2″0.45
Wallboard, Wonderboard, or
Durock11/2″0.20
Ceramic board (Fiberfrax or Micor)11/2″1.10
Nominal solid clay brick11″0.20
Ceramic wall or floor tile11/4″0.01
Mineral wool insulation21″3.12
Cement mortar21″0.20
Horizontal still air2*1/8″0.92
1According to Intertek Testing Services, Inc.
2According to ASHRAE Handbook of Fundamentals
1977
HearthStone’s Thermo-Ceramic Baffle System
To enhance the combustion efficiency and reduce the emissions of the fire in your stove HearthStone
QHHP, Inc. has developed an advanced THERMO-CERAMIC baffle system. This system uses a
lightweight, durable ceramic material above the burner tubes to maintain the high temperatures in the
secondary combustion area and maintain the low emission – high efficiency combustion you desire. This
new technology will not corrode, rust dissolve or lose its strength, however it is vulnerable to puncture or
cracking due to rough handling.
PLEASE EXERCISE CARE WHEN LOADING WOOD OR CLEANING YOUR
STOVE, NOT TO DAMAGE THE Thermo-Ceramic BAFFLE
Located directly above the burner tubes in the firebox, this white sheet of material will break if wood or
cleaning brushes impact it. Be careful when loading and cleaning your stove to not break this material. If
this piece has been fractured or a hole is punctured, it will cause the stove to function improperly. You must
replace the board through a qualified HearthStone dealer.

8
INSTALLING THE SURROUND
4
2
3
1
Figure 4 Clydesdale Surround Assembly
To complete the assembly, you will need a Phillips
screwdriver and a 7/16” wrench. The Clydesdale surround
assembly will come in four sections, with a hardware
package. The four sections will be:
1- Right section
2- Left section
3- Center Top Outer section
4- Center Top Inner section
The hardware package will include:
2- ¼-20x5/8” Hex Screws
4- 10-24x½” Pan, Phillips Screws
2- 10-24x3/8” Flat Phillips Black Oxide Screws
4- 10-24x3/8” Pan, Phillips Black Oxide Screws
2- Surround Leveling Brackets
USE FIGURE 4 AS A REFERENCE, WHEN
ASSEMBLING THE SURROUND
1. Install the left and right surround brackets.
2. Locate and place the Right section (1) face down
on a soft surface.
3. Locate and place the Center Top Inner (4) and
Center Top Outer (3) sections face down in
position adjoining the right section (1).
1. Position the Center Top Inner and Outer
Sections (3+4) of the surround into position as
illustrated in Figure 4. Secure them to the top
panel using the fasteners provide in the zip lock
bag – proper placement of the screws is called
out in Figure 4
2. Repeat steps 1-4 with the Left section (2)
4. Lift the completely assembled surround close the
front of the insert. Locate the four bushings on
the back of the surround. These four bushings
will slide into the receiving slots on the surround
mounting brackets (located on the insert)
5. Lift the surround and place on the insert. Ensure
that the surround has fully seated into the slots,
as the bottom of the surround should be flush
with the bottom of the insert.
6. Use the leveling brackets if needed to keep the
bottom edges of the surround flush to the hearth.
Install the leveling brackets by bolting them into
the square cutout on the back bottom of the
surround using the 10-24x3/8” bolts provided.
Turn the ¼-20 bolts down into the threaded holes
on the bottom of the leveling brackets. These
bolts can now be turned to raise the surround.
Clearances to NFPA 211 Protected Surfaces
You can reduce the clearances to combustible surfaces by
using any National Fire Protection Agency (NFPA)
approved wall protection system. Please refer to NFPA

9
211 for specifications and complete details. You can
obtain this information directly from NFPA.
Clearances to combustible surfaces can be reduced by
using any NFPA approved wall protection system.
REFER TO NFPA 211 FOR SPECIFIC AND
COMPLETE DETAILS:
National Fire Protection Agency
Battery March Park
Quincy, MA 02269
1-800-344-3555
1-617-770-3000
CLEARANCE TO COMBUSTIBLES
COMBUSTIBLE MANTLE
SIDE WALL
SIDE
TRIM
Figure 5 Clearance to Combustibles
A. side wall = 12”
B. mantle and top trim = 24”
B. mantle/ with mantle shield kit = 11”
C. trim = 9”
REMOVING THE BAFFLE (OPTIONAL)
- See page 26 and 30
VENTING COMPONENTS AND CONFIGURATION
It is very important to follow minimum clearances for
chimney connectors to combustibles such as walls and
ceilings when installing the stove near non-
combustible surfaces
•Single wall connector is 24 MSG or 25 MSG blued
steel stovepipe.
INSTALLING A VENTING SYSTEM
DO NOT CONNECT THIS UNIT TO ANY AIR
DISTRIBUTION DUCT OR SYSTEM
Secure all joints, including attaching the stovepipe to the
Fireplace Insert's flue collar, with three sheet metal
screws. Install #10 x 1/2" (3 mm x 13 mm) sheet metal
screws into the holes pre-drilled in the flue collar.
Leaving off the screws can cause joints to separate from
the vibration that results from a creosote chimney fire.
Long runs of stovepipe to increase heat dispersal are not
recommended. Using longer lengths of stovepipe or more
connecting elbows than necessary increase the chances of
draft resistance and the accumulation of creosote buildup.
Remember, the NFPA has recommended, minimum
clearances for chimney connectors to combustibles such
as walls and ceilings. Once the Fireplace Insert is
installed at safe distances from these combustible
surfaces, it is important to maintain these connector
clearances for the remainder of the installation.
CONNECTING YOUR WOOD FIREPLACE INSERT
You can install your Clydesdale to a prefabricated metal
chimney or a masonry chimney. See figure 7 to aid in
connections.
CONNECTING TO A PREFABRICATED METAL
CHIMNEY
THIS FIREPACE INSERT MUST BE INSTALLED
WITH A CONTINUOS CHIMNEY LINER WITH
AMINIMUM DIAMETER OF 6” EXTENDING FROM
THE FIREPLACE INSERT TO THE TOP OF THE
CHIMNEY. THE CHIMNEY LINER MUST
CONFORM TO THE CLASS 3 REQUIREMENTS OF
CHIMNEY LINER STANDARDS CAN/ULC-S635 OR
CAN/ULC- S640
You can install the Clydesdale in a masonry or zero
clearance fireplace. Before installing the stove in a
factory-built fireplace, the fireplace must have the
following characteristics:
1. Listed per UL 127 or ULC S610.
2. Include a full height listed chimney liner meeting
type HT requirements (2100° Fahrenheit) per UL 1777
(United States) or ULC S635 (Canada) standards.
3. The means to prevent room air passage to the
chimney cavity of the fireplace.
4. Does not disturb the airflow in or within the
fireplace when installed (louvers, or cooling air inlet or
outlet ports must not be blocked).

10
5. Not be altered in any way, except for the
following:
a. External trim pieces which do not affect the
operation of the fireplace can be removed, providing they
are stored on or within the fireplace for re-assembly if the
insert is removed.
b. The chimney damper can be removed to install
the chimney liner.
6. Must not have blocked circulating chambers (if
available).
7. The means for removing the insert to clean the
chimney flue.
8. Have a permanent metal warning label (provided with
the Clydesdale—see illustration to the below) attached to
the fireplace by riveting it to the outside wall, stating that
the fireplace must be restored to its original condition for
safe use without the insert.
Remember, you must adhere to all previously described
floor protection requirements when installing into a zero
clearance fireplace.
▌WARNING:
DO NOT CONNECT THE FIREPLACE INSERT
TO A CHIMNEY FLUE SERVING ANOTHER
APPLIANCE.
Make sure the size of the chimney’s flue is appropriate for
the Clydesdale. The Clydesdale requires a 6" (152 mm)
inside diameter flue for new installations. A 6” diameter
flue provides adequate draft and performance. You can
use an 8" (203 mm) diameter existing flue with a reducer.
An oversized flue contributes to creosote accumulation.
(In this case, bigger is NOT better.)
There are two ways to install a prefabricated metal
chimney:
•An interior installation where the chimney passes
inside the residence through the ceiling and roof.
•An exterior installation where the chimney passes
through the wall behind the Fireplace Insert then up
the outside of the residence.
Whenever possible, choose an interior chimney. An
interior chimney heats up more quickly and retains its
heat; thus promotes a better draft and discourages the
formation of creosote. An exterior chimney does not
benefit from the warmth of being surrounded by the
building, so it typically operates at lower flue
temperatures than an interior chimney. An exterior
chimney’s draft is not as strong and may experience
increased creosote accumulation.
REMOVE DAMPER OR WIRE IT OPEN

11
Figure 6 Connecting to a chimney

12
Surround Caps
Figure 7 Surround Cap Kit # 94-5970510 (matte) or
94-5970559 (blue/black) or 94-5970710 (matte double)
or 94-5970759 (blue/black double)
Most zero clearance installations will raise the Clydesdale
approximately 6” off the hearth or floor. In order to finish
the surrounds, HearthStone offers a surround cap kit. See
the illustration in figure 8 to see the placement of the
surround caps .
CONNECTION TO AMASONRY CHIMNEY
Before connecting to a masonry chimney, hire a
professional to examine the chimney for cracks, loose
mortar, and other signs of deterioration and blockage. If
the chimney needs repair, complete them before installing
and using your Fireplace Insert. Do not install your
Fireplace Insert until the chimney is safe for use.
Make sure the chimney’s cleanout is complete and
working properly. To avoid a loss of draft, the cleanout
must close off completely. If allowed to cool, your
Fireplace Insert will perform poorly and creosote will
build up in the chimney.
Make sure the size of the chimney’s flue is appropriate for
this Fireplace Insert and that it is not too large. Use a
masonry chimney with an 8" x 8" (203 mm x 203 mm)
tile size for best results. An oversized flue will contribute
to the accumulation of creosote.
Use the following checklist to ensure that your masonry
chimney meets these minimum requirements:
Chimney wall construction:
Brick or modular block at least 4" (102 mm) thick.
A rubble or stone wall.
Flue liner:
Minimum thickness of 5/8" (16 mm).
Installed with refractory mortar.
At least 1" (25 mm) air space.
An equivalent flue liner must be a listed chimney
liner system meeting type HT requirements or other
approved material. Interior chimney requirements:
At least 2" (51 mm) clearance to combustible
structure
Fire stops must be installed at the spaces where the
chimney passes through floors and/or ceiling.
Insulation must be 2" (51 mm) from the chimney.
Exterior chimney requirements:
At least 1" (25 mm) clearance to combustible
structure.
Chimney height requirements: (See Illustration)
At least 3 feet (0.9 m) higher than the highest part of
the roof opening through which it passes.
At least 2 feet (0.6 m) higher than any part of the roof
within 10 feet (3 m) measured horizontally from the
top of the chimney. This Fireplace Insert requires a
minimum chimney height of 13 feet (4 m). The
maximum allowable chimney height is 30 feet (9m).
The surround must be sealed to the fireplace front or the
damper area around the chimney liner must be sealed to
prevent room air from entering the chimney cavity of the
fireplace.
WARNING Do not remove bricks or mortar from the
existing fireplace (Exception) Masonry or steel
(including the damper plate) may be removed from the
smoke shelf and adjacent damper frame if necessary to
accommodate a chimney liner, provided their removal
will not weaken the structure of the fireplace and
chimney, and will not reduce protection for clearance to
combustible materials to less then required by the
National Building Code.

13
Operating Your
Clydesdale Wood
Fireplace Insert
▌WARNING:
HOT WHILE IN OPERATION. KEEP
CHILDREN, CLOTHING AND FURNITURE
AWAY. CONTACT MAY CAUSE SKIN
BURNS.
Please read this entire chapter before lighting your first
fire. It explains the controls and features of your wood
Fireplace Insert, how to choose firewood, and how to
break-in your Fireplace Insert and use it on a daily basis.
CONTROLS AND FEATURES
WARNING: ONLY OPERATE WITH DOOR FULLY
OPEN OR CLOSED. IF DOORS ARE LEFT PARTLY
OPEN, GAS AND FLAME MAY BE DRAWN OUT OF
THE OPENING, CREATING RISKS FROM BOTH
FIRE AND SMOKE
IF OPERATING WITH DOORS FULLY OPEN, YOU
MUST USE THE ACCESSORY SCREEN AVAILIBLE
THROUGH YOUR HEARTHSTONE DEALER
If operating with the door open, some fuels may create
carbon monoxide, which can be hazardous or fatal to your
health. Do not burn anything but clean dry firewood
FRONT DOOR: The front door allows you to load wood
into your Fireplace Insert; a fixed handle allows you to
operate the front door and allows you to latch the front
door closed. The front door can be reversed to open from
either side. To open the door, lift the handle to the 2
o’clock (or 10 o’clock for RH mounted door) position
and pull the door. To latch the doors, push the door
closed tightly then lower the handle to the 4 o’clock (8
o’clock for RH mounted door) position. Pull on the door
handle to make sure it is properly latched.
Reversing the door (Refer to Figure 9)
To switch the door to open from the right, simply remove
the ash lip assembly, and front facade. Remove the two
Phillips head screws holding the door hinges on (A+B in
Figure 9) (use caution, once the last screw is removed
the door will be loose in your hands) Be careful not to
lose the two hinge rivets. Using a Phillips head
screwdriver remove the door catch (C in Figure 9) (There
may be spacer washer behind the catch to provide an
adequate seal. Remove the two screws where the hinges
will go on the left side. Rotate the door 180 degrees, and
put the hinges in place. Reattach the door catch on the
opposite side of the front, using the same screws and
spacer washers if necessary.
Figure 8 Reversing the Door
PRIMARY AIR CONTROL: The handle is located on the
front bottom center of the Fireplace Insert. The primary
air control allows you to regulate the amount of air
entering the firebox. Generally, the more air allowed into
the firebox, the faster and hotter the rate of burn;
conversely, less air creates a slower burn. To fully open
the primary air intake, push the handle as far as it will go
to the left toward the firebox; push the handle as far as it
will go to the right, away from the firebox to close the
primary air control.
INSTALLING AND OPERATING THE BLOWER
When using the optional blower, follow the instructions
that are packaged with the blower, to install and operate.
The power cord can be routed to the left or right of the
insert, assuming that you follow the instructions provided.
CHOOSING FIREWOOD
Your Clydesdale Wood Heater is designed to only burn
firewood-also known as cordwood.
▌CAUTION:
DO NOT USE CHEMICALS OR FLAMMABLE
FLUIDS SUCH AS GASOLINE, NAPHTHA,
KEROSENE, CHARCOAL LIGHTER FLUID OR
ENGINE OIL TO START A FIRE. DO NOT USE
CHARCOAL, PELLETS, COAL, ARTIFICIAL
LOGS OR ANY OTHER MATERIALS AS FUEL;
THEY ARE NOT SAFE. DO NOT BURN
GARBAGE.

14
The quality of your firewood affects heat output, duration
of burn and performance of your Fireplace Insert.
Softwoods generally burn hotter and faster, while
hardwoods burn longer and produce more coals. Density
and moisture content are two critical factors to consider
when purchasing wood for your Fireplace Insert.
The following is a list of wood species and their relative
BTU (British Thermal Unit) content. The higher the BTU
the longer the burn. Firewood with higher BTUs is
generally considered ideal for a wood stove.
HIGH: Apple, Black Birch, Hickory, Locust, White Oak,
Black Beech, Mesquite
MEDIUM HIGH: White Ash, Beech, Yellow Birch,
Sugar Maple, Red Oak
MEDIUM LOW: Black Ash, White Birch, Grey Birch,
Elm, Norway Pine, Pitch Pine, Black Cherry, Soft Maple,
Tamarack
LOW: White Pine, White Cedar, Balsam Fir, Spruce,
Aspen, Basswood, Butternut, Hemlock
Moisture content also plays a key role in the performance
of your stove. Wood freshly cut from a living tree (green
wood) contains a great deal of moisture. As you might
expect, green wood has difficulty burning and should be
seasoned before using it in your wood stove. To properly
season green wood, it should be split, stacked and allowed
to air dry for a period of one year.
Stack the firewood on skids or blocks to keep it off the
ground, cover only the top of the stack. Plastic or tarps
that cover the sides of the woodpile trap moisture and
prevent the wood from drying. As for stacking, an old
Vermonter said, "The spaces between the logs should be
large enough for a mouse to get through, but not for the
cat that's chasing it."
Firewood should not be stored within the Fireplace
Insert's specified clearances to combustible materials.
BUILDING AFIRE
Once you understand the controls of your wood Fireplace
Insert and have chosen the appropriate firewood, you are
ready to start a fire.
BREAKING IN YOUR WOOD FIREPLACE INSERT
It is imperative that your Fireplace Insert be "broken in"
slowly. Cast iron must be "seasoned"; over-firing a new
Fireplace Insert may cause castings to crack or may
damage other Fireplace Insert parts. Moisture in the
soapstone must be driven out slowly to minimize the
“shock” to the stone of its first exposure to high firebox
temperatures.
When you light your first fires, the wood Fireplace Insert
will emit some smoke and fumes. This is normal “off-
gassing” of the paints and oils used when manufacturing
the wood Fireplace Insert. If you find it necessary, open a
few windows to vent your room. The smoke and fumes
will usually subside after 10 to 20 minutes of operation.
The odor and smoke will end once the Fireplace Insert is
“cured”.
The first fires may produce other odors from impurities
that exist in the area immediately surrounding the
Fireplace Insert. Some of these impurities can be
cleaning solvents, paint solvents, cigarettes, smoke, pet
hair, dust, adhesives, a new carpet, and new textiles.
These odors will dissipate over time. You can alleviate
these odors by opening a few windows or otherwise
creating additional ventilation around your Fireplace
Insert. If any odor persists, contact your dealer or an
authorized service technician.
If you adhere to the following break-in procedure, as well
as all other operating procedures in this manual, the cast
iron and soapstone components of your Fireplace Insert
will give you many years of trouble-free use. With use,
the color of the soapstone may change and small fractures
may appear on the surface of the stone. These changes
will only add character and distinction to your Fireplace
Insert.
Avoid the following conditions that can cause the
soapstone or cast iron pieces to break:
•Do not throw wood into the Fireplace Insert.
•Do not use the door as leverage to force wood into
the Fireplace Insert.
•Do not load wood that is encrusted with ice into a
burning stove as the thermal shock can cause
damage.
•Do not use a manufactured grate. Burn the fire
directly on the soapstone that lines the bottom of the
firebox.
The bottom layer of soapstone in the firebox is intended
to prevent thermal stress and should remain in place in the
firebox at all times.

15
BUILDING ABREAK IN FIRE
1) Open the front door and place five or six
double sheets of tightly twisted newspaper
in the center of the firebox. Arrange
kindling in a crisscross pattern over the
newspaper. Kindling should be
approximately ten pieces, 1/2" (13 mm) in
diameter and 10" to 18" (254 mm to 457
mm) long.
2) Fully open the primary air control by
pushing the control handle fully to the left,
away from the firebox.
3) Light the paper under the kindling. Leave
the front door slightly ajar momentarily until
the kindling has started to burn and draft
begins to pull.
4) Close the door and allow the fire to burn.
Keep the front door closed while the
Fireplace Insert is in use.
5) KEEP A WATCHFUL EYE ON YOUR
FIREPLACE INSERT to maintain a steady,
low-heat fire. Your first fire should make
the Fireplace Insert warm but not hot to the
touch. At most, a few small chunks of
wood should be added to the fire to reach
safe break-in temperatures.
6) Once the Fireplace Insert is warm but not
hot to the touch, close the primary air
control by pushing it fully to the right to
allow the fire to die out completely.
7) Let the Fireplace Insert return to room
temperature.
Your first fire and first fire each season thereafter should
be built and maintained as outlined above. Your patience
will be rewarded by a properly seasoned Fireplace Insert.
NOTE: Because of the cool flue gas temperatures present
during the break-in procedure, creosote may build up
quickly. Your window may get dirty. A good hot fire will
clean it. We recommend a visual inspection (and cleaning
if necessary) of your stovepipe and chimney once the
break-in procedure is completed.
NORMAL OPERATION
If your Fireplace Insert is not used continuously or has not
been used in quite some time, follow the break-in
procedure at least once to minimize the stress of a hot fire
on a cold Fireplace Insert before proceeding with normal
operation. We recommend one break-in fire at the start of
each heating season.
BUILDING AFIRE FOR EVERYDAY USE
1) Open the front door and place five or six double
sheets of tightly twisted newspaper in the center
of the firebox. Arrange kindling in a crisscross
pattern over the newspaper. Kindling should be
approximately ten pieces, 1/2" (13 mm) in
diameter and 10" to 18" (254 to 457 mm) long.
2) Fully open the primary air control by pushing it
completely to the right, away from the firebox.
3) Light the paper under the kindling. Leave the
front door slightly ajar momentarily until the
kindling has started to burn and draft begins to
pull.
4) Close the door and allow the fire to burn.
5) Once the kindling is burning, open the front door
and add logs, small at first, to build the fire up.
Make sure to keep the logs away from the glass
in front in order for the air-wash system to work
properly. Otherwise, keep the door closed while
the stove is in use.
6) Once the fire is burning well, use the primary air
control to regulate the desired rate of burn.
Pushing the handle to the left opens the
PRIMARY AIR CONTROL for a high rate of
burn or pushing it to the right for a low rate of
burn.
Note: When opening the front door to reload or
re-arrange logs, it is advisable to open the door just
a crack, pause for a moment then open the door
completely. This procedure will allow the firebox
to clear of smoke before the door is opened fully.
Also, reloading on a bed of hot, red coals reduces
smoking time and will bring fresh fuel up to a high
temperature rapidly.
OVER-FIRE CAUTION
Over-firing means the Fireplace Insert is operating at
temperatures above the recommended temperatures
outlined above in the BURN RATE section. Over-firing
should be carefully avoided since it will cause damage to
the Fireplace Insert. Symptoms of over-firing include
short burn times, a roaring sound in the Fireplace Insert or
stovepipe, and discoloration of the stovepipe.

16
Over-firing can be caused by excessive draft,
inappropriate fuel, and operator error. Correct an over-
fire situation as follows:
EXCESSIVE DRAFT: Contact your dealer to
have a draft reading taken.
INAPPROPRIATE FUEL: Do not burn coal,
kiln dried lumber, wax logs or anything other than natural
cordwood.
OPERATOR ERROR: Make sure all the gaskets
are in good condition. Replace worn out or compressed
gaskets. Do not burn the Fireplace Insert with the front
door in the open position.
Monitoring the temperature of the surfaces is the best way
to determine if the Fireplace Insert is over-firing. If you
suspect that your Fireplace Insert is over-firing, contact
your dealer immediately. Damage done by over-firing
is not covered by your warranty. Results of over-firing
can include: warped or burned out internal parts, cracked
stones, discolored or warped external parts, and damaged
enamel.
NOTE: ANY SYMPTOMS OF OVER-FIRING
WILL VOID YOUR WARRANTY!!
MAINTENANCE
Do not over-fire the Fireplace Insert. (refer to page 15).
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. These creosote vapors condense in the
relatively cool chimney flue of a slow-burning fire. As a
result, creosote residue accumulates on the flue lining.
When ignited, this creosote makes an extremely hot fire,
which may damage the chimney or even destroy the
house. When burning wood, the chimney connector and
chimney should be inspected at least once every two
months during the heating season to determine if a
creosote buildup has occurred.
To prevent the buildup of creosote:
1. Burn the Fireplace Insert with the primary air
control fully open for 35 - 45 minutes daily to burn out
creosote deposits from within the Fireplace Insert and the
venting system.
2. After reloading with wood, burn the
Fireplace Insert with the primary air control fully open for
20 to 30 minutes. This manner of operation ensures early
engagement of the secondary combustion system which,
when engaged, minimizes creosote buildup in the
chimney.
The stovepipe connector and chimney should be inspected
at least monthly during the heating season to determine if
a creosote build-up has occurred. If a creosote residue
greater that 1/4" (6 mm) has accumulated, it should be
removed to reduce the risk of a chimney fire.
If your glass is remaining dirty, your operating
temperatures are low; therefore, there is a higher risk of
creosote buildup.
The venting system must be inspected at the Fireplace
Insert connection and at the chimney top. Cooler surfaces
tend to build creosote deposits quicker, so it is important
to check the chimney at the top (where it is coolest) as
well as from the bottom near the Fireplace Insert.
Accumulated creosote should be removed with a cleaning
brush specifically designed for the type of chimney in use.
A certified chimney sweep should be used to perform this
service. Contact your dealer for the name of a certified
chimney sweep in your area (your dealer may be a
certified sweep!).
It is also recommended that before each heating season
the entire system be professionally inspected, cleaned and
repaired, if necessary.
GASKETS
Gasket material should normally be replaced every two to
three seasons, depending on Fireplace Insert use. If the
door seal is loose, a new gasket will assure a tight seal
and improved Fireplace Insert performance. Contact your
dealer for a gasket kit that includes instructions and
gaskets for your Fireplace Insert.
The procedure for replacing gaskets on the glass is
reviewed below under “Glass”.
To replace door gaskets, first remove the old gaskets with
a utility or putty knife. Clean all gasket channels with a
wire brush. Apply gasket cement to the channels and
push the new gasket into place without stretching the
gasket material. The door should be shut immediately to
fully press the gasket into place and assure a positive seal.

17
GLASS
Do not operate the Fireplace Insert with a broken door
glass. Do not abuse the front door by striking or
slamming.
When necessary, the glass can be cleaned with low
alkaline content commercial stove glass cleaners, which
are available from your local dealer. Never attempt to
clean the glass while the fire is burning or the glass is hot.
Most deposits can be cleaned by following the
instructions provided with the cleaner. To clean heavier
deposits, remove the top hinge and lift the door straight
up and off the Fireplace Insert (take care to save hardware
for reuse). Lay the door face down on a workbench or
table. Apply the cleaner to the glass and allow it to set for
a few minutes. By laying the door flat, it will allow the
cleaner to penetrate rather than running off the surface of
the glass. Wipe the cleaner off with a soft cloth.
Important: scratching or etching the glass will
weaken the integrity of the glass. Do not use a
razor blade, steel wool, or any other abrasive
material to clean the glass. Use low alkaline
content cleaners only.
The front door glass is a ceramic, shock-resistant glass,
made specifically for use in woodstoves. Do not use any
replacement glass other than the ceramic glass
manufactured and supplied for use in this woodstove.
Replacement glass is available through your local dealer.
The door glass should be replaced immediately if broken.
Contact your local dealer for replacement glass, which is
accompanied with instructions and everything needed for
the repair. If you replace the glass yourself, wear work
gloves and safety glasses.
The procedure for glass and glass gasket replacement is as
follows: Refer to Figure 9.
1. Remove the door by removing the top hinge
screw and lifting the door straight up off the
bottom hinge.
2. Place the door face down on a flat, smooth
surface.
3. Apply penetrating oil to the screws.. Remove the
screws to separate the glass from the door.
4. Carefully lift the damaged glass from the door
and discard.
5. Replace the screws.
6. Install the door.
WARNING Do not use substitute materials when
replacing the glass or any door components. Only
authorized HearthStone components should be used.
Glass specifications 12-5/16” x 22-7/8” x5mm neoceram
Figure 9 Glass Replacement
CAST IRON
Exterior cast iron parts are either painted with black, high-
temperature stove paint or porcelainized with an enamel
finish in various colors.
Use black, high-temperature stove paint (satin black by
Stovebright) to touch up and maintain the original
appearance of painted cast iron. Use a damp sponge to
wipe clean. Dry the cast iron thoroughly to prevent
rusting.
Enamel castings can be cleaned with a standard glass
cleaner. With time and use, a very fine, subtle network of
crazed lines may appear seemingly beneath the surface of
the enamel. Crazing is a natural predictable process and
does not represent a flaw.

18
TROUBLESHOOTING
Your Heating Needs
Virtually all woodstove operators experience basic
common problems at one time or another. Most are
correctable and generally require only a minor adjustment
of the stove, installation, or operating technique. In cases
where weather conditions dramatically affect stove
performance, the problems are typically temporary and
solve themselves once the weather changes.
Keep in mind that your house itself will regulate
room/house temperatures. How well the walls, floors and
ceilings are insulated, the number and size of glass
windows, the tightness of outside doors, and the
construction or style of your house (vaulted ceilings or
other open spaces which collect large percentages of heat,
ceiling fans, etc.) all are determining factors of room
temperature.
Your Fireplace Insert's performance is also dependant on
its installation. One common cause of poor performance
is an oversized chimney flue. Oversized chimney flues
result in decreased pressure, which prevents the smoke
from rising out the chimney. Oversized flues are also
more difficult to heat effectively, especially when burning
a high efficiency Fireplace Insert. Cool flue temperatures
inhibit the establishment of a strong draft (and encourage
the accumulation of creosote). The lack of a strong draft
will cause the fire to die down and may even force the
smoke to pour into the room. If your chimney is the
proper size and a strong draft is not easily established,
there is the possibility of the chimney being too cold.
Again, hot chimneys promote a stronger draft.
Other draft guidelines are as follows:
AN "AIRTIGHT" HOUSE: If your home is super-
insulated or especially well sealed, the (infiltration) air
supply to the interior of the house may be inadequate.
This phenomenon of air starvation within the building can
be exacerbated if exhaust fans, such as clothes dryers,
bathroom fans or cookstove exhaust fans, are in operation
within the home.
TALL TREES OR BUILDINGS: These obstructions,
when located in proximity to the top of the chimney can
cause chronic or occasional downdrafts. When selecting
a site for a new chimney, take care to consider the
placement of other objects near the proposed chimney
location.
WIND VELOCITY: Generally, the stronger and
steadier a wind, the stronger (better) the draft. However,
"gusty" wind conditions may cause erratic downdrafts.
BAROMETRIC PRESSURE: Chimney drafts are
typically sluggish on balmy, wet or muggy days. This is a
weather-related phenomenon, which generally is self-
correcting as the weather changes.
BRISKNESS OF FIRE: The hotter the fire in your
Fireplace Insert, the hotter your chimney and, therefore,
the stronger the draft.
SEASONAL FACTORS: Early fall and late spring are
generally difficult seasons in which to establish proper
drafts. The colder the outside air is (relative to room
temperatures) the stronger the draft.
Operating the Fireplace Insert
There are days when a draft is not easily established. As
outlined above, seasonal factors or a cold chimney may be
the cause. Try starting the fire by using small kindling
and fuel to obtain a quick, hot fire. Tend the fire
frequently with small fuel until the chimney is hot and the
draft is well established.
DISPOSAL OF ASHES
Ashes should be placed in a metal container with a
tight fitting lid. The closed container of ashes should
be placed on a non-combustible floor or on the
ground, well away from all combustible materials,
pending final disposal. If ashes are disposed of by
burial in soil or otherwise locally dispersed, they
should be retained in the closed container until all
cinders have thoroughly cooled.

19
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE SOLUTIONS
STOVE SMOKES Operating Technique Fully open the primary air control one minute before opening doors.
Cold Chimney Preheat the chimney when first starting a fire.
Blocked Chimney Examine the chimney and stovepipe for blockage or creosote
accumulations.
Oversized Chimney Reline the chimney to the appropriate diameter
Undersized Chimney Install a draft inducer or replace the chimney.
Chimney Too Short Lengthen the chimney.
Air Infiltration Into The
Chimney
Seal chimney connections and openings in clean-out doors.
More Than One Appliance
Connected to the Flue
Disconnect all other appliances and seal openings.
BACK-PUFFING OR
GAS EXPLOSIONS
Operating Technique Fully open the primary air control one minute before opening the
door and keep it fully open for a few minutes after reloading.
Extra Low Burn Rate Burn the Fireplace Insert at a higher burn rate.
Chimney Down-draft Install a chimney cap.
Excessive Ash Build-up Empty ashes more frequently.
UNCONTROLLED
OR SHORT BURN
Unsealed or Open Door Close the door tightly or replace the gaskets.
Deteriorated Cement Seals Reseal the Fireplace Insert with furnace cement.
Extra Long Chimney Shorten the chimney.
Oversized Chimney Reline the chimney to the proper diameter.
High Winds or Hilltop
Location:
Install a chimney cap.
INSUFFICIENT HEAT Poor Quality or Green
Wood
Use only air-dried wood, preferably dried at least one year.
Low Burn Rate Operate the Fireplace Insert at a higher burn rate.
Air Insulated Chimney Replace with a pre-fabricated insulated chimney system or a
properly sized masonry chimney.
Cold Exterior Chimney Reline or insulate the chimney.
Leaky Stovepipe or
Chimney
Check the installation.
Too Much Heat Loss From
House
Caulk windows, seal openings in home.
BLISTERING OF
ENAMEL CASTING
Operating Technique Do not over-fire the Fireplace Insert. Monitor Fireplace Insert
temperatures. Use seasoned wood only.
Excessive Draft Check the DRAFT. Operate the Fireplace Insert at a LOW BURN
range.