• Important operating
and maintenance
instructions included.
• Read, understand
and follow these
instructions for safe
installation and
operation.
WARNING
If the information in these instructions is not followed exactly, a
fi re may result causing property
damage, personal injury, or death.
• Do not store or use gasoline or other fl ammable vapors and liquids in the vicinity of
this or any other appliance.
• Do not overfi re. Overfi ring will void your
warranty.
• Comply with all minimum clearances to
combustibles as specifi ed. Failure to
comply may cause house fi re.
CAUTION
DO NOT
DISCARD
• Leave this manual with
party responsible for
use and operation.
WARNING
HOT! DO NOT TOUCH.
SEVERE BURNS MAY RESULT.
CLOTHING IGNITION MAY RESULT.
Glass and other surfaces are hot
during operation and cool down.
• Keep children away.
• CAREFULLY SUPERVISE children in same room
as fi replace.
• Alert children and adults to hazards of high
temperatures.
• Keep clothing, furniture, draperies and other
combustibles away.
Installation and service of this fi replace should
be performed by qualifi ed personnel. Hearth
& Home Technologies suggests NFI certifi ed
or factory-trained professionals, or technicians
supervised by an NFI certified
professional.
Heatilator • ST42A • 35038 Rev G • 02/05
WARNING
Fire Risk
• For use with solid wood fuel or decorative
gas appliance only.
• Do not install unvented gas logs.
1
Page 2
Read this manual before installing or operating this fi replace.
Please retain this owner’s manual for future reference.
Congratulations!
Congratulations on selecting a Heatilator wood burning fi replace. The Heatilator fi replace you have selected is designed
to provide the utmost in safety, reliability and effi ciency.
As the owner of a new fi replace, you’ll want to read and carefully follow all of the instructions contained in this owner’s
manual. Pay special attention to all cautions and warnings.
This owner’s manual should be retained for future reference.
We suggest you keep it with your other important documents
and product manuals.
The information contained in this owner’s manual unless noted
otherwise, applies to all models and gas control systems.
Your new Heatilator wood burning fi replace will give you years
of durable use and trouble-free enjoyment. Welcome to the
Heatilator family of fi replace products!
Homeowner Reference Information
We recommend that you record the following pertinent
information about your fi replace:
Model Name: Date purchased/installed:
Serial Number: Location on fi replace:
Dealership purchased from: Dealer phone:
Notes:
Listing Label Information/Location
The model information regarding your specifi c fi replace can be found on the rating plate located on the smoke shield of the
fi replace.
Serial
Number
Grate
Fireplace
Model
FIREPLACE NO.
FIRECHAMBER INTENDED FOR USE WITH HEARTH & HOME TECHNOLOGIES INC. LISTED FIREPLACE PARTS. SEE INSTALLATION AND
OPERATING INSTRUCTIONS FOR THIS MODEL. ONLY HEARTH & HOME TECHNOLOGIES INC. GLASS DOOR KITS CAN BE INSTALLED ON THIS UNIT.
FIREPLACE ALSO FOR USE
IN MANUFACTURED HOMES
FAN KI T
MODEL NO.
DO NOT OVERFIRE. USE ONLY: SOLID WOOD FUEL OR
LISTED DECORATIVE GAS APPLIANCE. DO NOT USE A
FIREPLACE INSERT OR OTHER PRODUCTS NOT
SPECIFIED FOR USE WITH THIS PRODUCT. IF DOORS
ARE USED OPERATE FIREPLACE WITH DOORS FULLY
OPEN OR CLOSED ONLY. WHEN BURNING A
DECORATIVE GAS APPLIANCE IN THE FIREPLACE,
ADJUST DAMPER TO THE FULLY OPEN POSITION.
2
YES
WARNING: RISK OF
FIRE DAMAGE. REPLACE
GRATE WITH HEARTH & HOME
TECHNOLOGIES INC.
NO
&
Heatilator • ST42A • 35038 Rev G • 02/05
MODEL NO.
CLEARANCE TO
COMBUSTIBLES:
WARNING! THIS FIREPLACE HAS NOT BEEN TESTED WITH AN UNVENTED
GAS LOG SET. TO REDUCE THE RISK OF FIRE OR INJURY, DO NOT
INSTALL AN UNVENTED GAS LOG SET INTO FIREPLACE.
WARNING! THIS APPLIANCE IS NOT FOR USE AS COOKING EQUIPMENT.
IF INSTALLATION OR OPERATING INSTRUCTIONS ARE MISSING
CONTACT: HEARTH & HOME TECHNOLOGIES INC.,
1915 W. SAUNDERS ST., MT. PLEASANT, IA 52641.
Note: An arrow () found in the text signifi es change in content.
Heatilator • ST42A • 35038 Rev G • 02/05
3
Page 4
1
Listing and Code Approvals
1
A. Appliance Certifi cation
This fi replace system has been tested and listed in accordance with UL 127 standards by Underwriters Laboratories
Inc. for installation and operation in the United States and
Canada.
This fi replace has been tested and listed for use with the optional components specifi ed in this manual. These optional
components may be purchased separately and installed at
a later date. Installation of an outside air kit will require signifi cant reconstruction and is best if installed at the time of
fi replace installation.
Heatilator is a registered trademark of Hearth & Home Technologies Inc.
WARNING
Fire Risk
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause injury or property damage.
Refer to the owner’s information manual provided with
this fi replace. For assistance or additional information
consult a qualifi ed installer, service agency or your
dealer.
Not intended for use as a primary heat source.
This fi replace is tested and approved as a decorative fi re-
place. It should not be factored as a primary heat source
in residential heating calculations.
• Do not install or operate damaged fi replace.
• Do not modify fi replace.
• Installation other than as instructed by Hearth & Home
Technologies Inc. is strictly prohibited.
• Do not operate the fi replace without fully assembling
all components.
• Do not overfi re.
• Do not install an unvented gas log set. This fi replace
has not been tested for use with unvented gas log
sets.
• Installation and/or use of any component part not
approved by Hearth & Home Technologies.
Hearth & Home Technologies disclaims any responsibility
for, and the warranty and agency listing will be voided by
the above actions.
4
Heatilator • ST42A • 35038 Rev G • 02/05
Page 5
2
Getting Started
A. Design and Installation Considerations
CAUTION
Check building codes prior to installation.
• Installation MUST comply with local, regional,
state and national codes and regulations.
• Consult insurance carrier, local building inspector,
fi re offi cials or authorities having jurisdiction about
restrictions, installation inspection and permits.
When planning a fi replace installation, it is necessary to determine the following information before installing:
• Where the fireplace is to be installed. See Sections
3 and 4.
• The vent system confi guration to be used. See Sections
5 and 6.
• Gas supply piping. See Section 7.
• Framing and fi nishing details. See Sections 3 and 8.
• Whether optional accessories are desired. See
Section 12.
Draft is the pressure difference needed to vent fi replaces
successfully. Considerations for successful draft include:
• Preventing negative pressure
• Location of fi replace and chimney
WARNING
Asphyxiation Risk
Negative pressure can cause spillage of
combustion fumes and soot. Fire needs to draft
properly for safe operation.
B. Negative Pressure
Negative pressure results from the imbalance of air available for the fi replace to operate properly. Causes for this
imbalance include:
• Exhaust fans (kitchen, bath, etc.).
• Range hoods.
• Combustion air requirements for furnaces, water heaters
and other combustion appliances.
• Clothes dryers.
• Location of return-air vents to furnace or air
conditioning.
To minimize the effects of negative air pressure, the following must be considered:
• Install the outside air kit. Install the intake on the side of
the house towards prevailing winds during the heating
season.
• Ensure adequate outdoor air is supplied for combustion
appliances and exhaust equipment.
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the fi replace.
• Avoid installing the fi replace near doors, walkways or small
isolated spaces.
• Recessed lighting should be a “sealed can” design; attic
hatches weather stripped or sealed; attic mounted duct
work and air handler joints and seams taped or sealed.
• Basement installations should be avoided due to stack
effect. Stack effect creates negative pressure in lower
levels. Hearth & Home Technologies recommends the
use of direct vent fi replaces in basements.
Heatilator • ST42A • 35038 Rev G • 02/05
5
Page 6
Location of the fi replace and chimney will affect performance.
As shown in Figure 2.1 the chimney should:
• Be installed through the warm airspace enclosed by the
building envelope. This helps to produce more draft,
especially during lighting and die-down of the fi re.
• Penetrate the highest part of the roof. This minimizes the
effects of wind turbulence.
• Be located away from trees, adjacent structures, uneven
roof lines and other obstructions.
Offsets can restrict draft so their use should be minimized.
Consider the fi replace location relative to fl oor and ceiling
and attic joists.
Recommended
Location
Recommended
Location
Location
Not
Recommended
Windward
Outside Air Intake
Figure 2.1 Recommended Chimney Locations
Marginal
Location
Location
Not
Recommended
Leeward
Multi-level Roofs
6
Heatilator • ST42A • 35038 Rev G • 02/05
Page 7
C. Typical Fireplace System
The Heatilator fi replace system consists of the following:
• Fireplace/integral grate/refractory/outside air system
• Chimney termination cap
• Chimney system
• Hearth extension
Optional components include:
• Glass doors
• Chimney air kit
• Fan kit (circulating fi replaces only)
• Junction box (circulating fi replaces only)
Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
Non-combustible
roof flashing maintains
minimum clearance
around chimney
Support straps
on rafter supports
chimney (not shown)
Firestop spacer
on floor of attic
Termination cap
Storm Collar
Chimney penetrates roof
preferably without affecting
roof rafters
Offset/Return (with hanger straps)
Attic insulation shield may
be used here to keep insulation
away from chimney
Chimney system
Combustible
framing/header
on top of
V-shaped
standoffs
(spacers)
Outside
combustion air
Protective metal
hearth strip(s)
Figure 2.2 Typical Fireplace System
Framing headed off
in ceiling joists
Enclosed space above
and around fireplace
Mantel and surround
Decorative facing
and trim
Hearth extension
Factory-built fireplace
Heatilator • ST42A • 35038 Rev G • 02/05
7
Page 8
D. Tools and Supplies Needed
Before beginning the installation be sure the following tools
and building supplies are available:
Reciprocating saw Framing material
Pliers High temp caulking material
Hammer Gloves
Phillips screwdriver Framing square
Flat blade screwdriver Electric drill and bits
Plumb line Safety glasses
Level Tape measure
1/2-3/4 in. length, #6 or #8 self-drilling screws
Misc. screws and nails
CAUTION
• Keep fi replace dry.
• Mold or rust may cause odors.
E. Inspect Fireplace and Components
WARNING
Fire Risk
Explosion Risk
Inspect fireplace and components for
damage. Damaged parts may impair safe
operation.
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components
Report damaged parts to dealer.
• Carefully remove the fi replace and components from the
packaging.
• The vent system components and doors are shipped in
separate packages.
• Report to your dealer any parts damaged in shipment.
• Read all the instructions before starting the installation.
Follow these instructions carefully during the
installation to ensure maximum safety and benefi t.
8
Heatilator • ST42A • 35038 Rev G • 02/05
Page 9
3
Framing and Clearances
WARNING
Fire Risk
Provide adequate clearances.
• Around air openings
• To combustibles
• For service access.
Locate fi replace away from traffi c areas.
A. Selecting Fireplace Location
Several options are available to you when choosing a location for your fi replace. This fi replace may be used as a room
divider, installed along a wall, across a corner or used in an
exterior chase. See Figure 3.1.
20 in. (508 mm)
66 in.
(1676 mm)
42 in.
(1067 mm)
12 in. (305 mm)
min. to
perpendicular
wall.
(1626 mm)
(hearth
extension)
64 in.
Note:
• Illustrations and photos refl ect typical installations
and are FOR DESIGN PURPOSES ONLY.
• Illustrations/diagrams are not drawn to scale.
• Actual installation/appearance may vary due to
individual design preference.
• Hearth & Home Technologies reserves the right to
alter its products.
Locating the fi replace in a basement, near frequently opened
doors, central heat outlets or returns, or other locations of
considerable air movement can affect the performance and
cause intermittent smoke spillage from the front of the fi replace. Consideration should be given to these factors before
deciding on a location. See Sections 2 and 10.
Note: 1/2 in. (13 mm) min. dis-
tance from fi replace to
combustible materials.
Note: In addition to t hese fram-
ing dimensions, also
reference the following
sections:
• Clearances (Sec-
tion 3.B.)
• Mantel Projections
(Section 8.C.)
• Fireplace Dimensions
(Section 12.A.)
Figure 3.1 Fireplace Locations
Heatilator • ST42A • 35038 Rev G • 02/05
9
Page 10
B. Clearances
Fire Risk
• Comply with all minimum clearances to
Failure to comply may cause fi re.
Storm Collar
Roof Flashing
2 in. min.
(51 mm)
(attic)
WARNING
combustibles as specifi ed.
(roof)
2 in. (51 mm) min.
Attic
Insulation
Shield
Firestop Spacer
(ceiling)
2 in. (51 mm) min.
Firestop Spacer
2 in. (51 mm) min.
0 in.
to floor
Figure 3.2 Clearances to Combustible Materials
2 in. (51 mm) min.
2 in. (51 mm) min.
Offset/Return with
hanger straps
(ceiling)
2 in. (51 mm) min.
Must have 2 in. (51 mm)
0 in. to level
of standoffs
1/2 in. (13 mm) to side of appliance
minimum clearance
to header
10
Heatilator • ST42A • 35038 Rev G • 02/05
Page 11
C. Sidewalls/Surrounds
Adjacent combustible side walls must be located a minimum of 12 in. (305 mm) from the fi replace opening. See Figure 3.3.
If you are using a decorative surround constructed of combustible material, it must be located within the shaded area defi ned in Figure 3.3. Short stub walls are also acceptable if they are contained within the shaded area.
14-3/8 in.
(365 mm)
50 deg.
Figure 3.3 Sidewalls and Surrounds
Flush
Front
12 in.
(305 mm)
Brick
Front
42 in.
(1067 mm)
(opening)
48 in.
(1219 mm)
(framing)
12 in.
(305 mm)
4 in.
(102 mm)
9-3/4 in.
(248 mm)
37 deg.
D. Frame the Fireplace
Figure 3.4 shows a typical framing (using 2 x 4 lumber) of the fi replace, assuming combustible materials are used. All required clearances to combustibles around the fi replace must be adhered to. See Figure 3.2. Any framing across the top of
the fi replace must be above the level of the top standoffs.
You must maintain
2 in. (51 mm) min. air space
clearance from the
chimney to the
enclosure.
27 in.
(686 mm)
39-1/8 in. (994 mm)
12 in. (305 mm) max.
Note: Fireplace
Header cannot be
positioned until after
the fireplace assembly
is in place.
48 in.
(1219 mm)
Figure 3.4 Framing the Fireplace
Heatilator • ST42A • 35038 Rev G • 02/05
11
Page 12
E. Construct the Chase
A chase is a vertical boxlike structure built to enclose the
fi replace and/or its vent system. Vertical chimneys that run
on the outside of a building may be, but are not required to
be, installed inside a chase.
Construction of the chase may vary with the type of building. These instructions are not substitutes for the requirements of local building codes. Local building codes MUST
be checked.
Chases should be constructed in the manner of all outside
walls of the home to prevent cold air drafting problems. The
chase should not break the outside building envelope in any
manner.
Building codes require false ceiling and fi restop spacers at
each fl oor of the chase or every 10 ft (3.05 m) of clear space
to control spread of fi re.
Walls, ceiling, base plate and cantilever fl oor at the fi rst level
of the chase should be insulated. See Figure 3.5. Vapor and
air infi ltration barriers should be installed in the chase as per
regional codes for the rest of the home. Additionally, Hearth
& Home Technologies recommends that the inside surfaces
be sheet rocked and taped for maximum air tightness.
Gas line holes and other openings should be caulked with
high temperature caulk or stuffed with unfaced fi berglass insulation. If the fi replace is being installed on a cement slab,
we recommend that in cold climates, a sheet of plywood or
other raised platform be placed underneath to prevent conducting cold up into the room.
Two examples of chase applications are shown in Figure 3.6.
1. Chimney offset through exterior wall and enclosed in
chase.
2. Chase constructed on roof.
Round Termination Cap
Metal Chase Top
Firestop
Spacer
False Ceiling
Ta bs
Insulation
False Ceiling
Figure 3.5 Chase Assembly
Insulation
Insulation
False Ceiling
Chimney
Attic
Shield
Firestop
Spacer
1
Figure 3.6 Chase Constructions
2
F. Chimney Requirements
When planning your fi replace location, the chimney construction and necessary clearances must be considered.
The fi replace system and chimney components have been
tested to provide fl exibility in construction. Vertical distances
are measured from the base of the fi replace as shown in
Figure 5.2.
ftmeters
a. Minimum overall straight height14.04.27
b. Minimum height with offset/return16.54.93
c. Maximum height90.027.43
d. Maximum chimney length between an offset and
return
e. Maximum distance between chimney stabilizers35.010.67
f. Double offset/return minimum height22.06.71
g. Maximum unsupported chimney length between the
offset and return
h. Maximum unsupported chimney height above the
fi r e p l a c e
i. Maximum unsupported chimney above roof6.01.83
10.03.05
6.01.83
35.010.67
12
Heatilator • ST42A • 35038 Rev G • 02/05
Page 13
4
Installation of Fireplace
4
CAUTION
Sharp Edges
• Wear protective gloves and safety glasses
during installation.
A. Install the Outside Air Kit
The outside air kit is supplied as an optional feature with this
fi replace and its use is highly recommended to minimize the
effects of negative pressure within the structure. We recommend you utilize the shortest duct run to optimize the performance of the outside air kit. The outside air kit inlet should
be positioned at least 4 ft (1.22 m) above the ground level, in
a manner that will not allow snow, leaves, etc. to block the inlet. See Figure 4.1 for proper placement of outside air inlet.
The outside air kit is installed on either side of the fi replace.
See Figure 4.2 for handle location/operation.
NO
Outlet blocked by
snow, leaves, etc.
NO
Garage or
combustible
liquids storage
WARNING
Fire Risk
Asphyxiation Risk
Do not draw outside combustion air from:
• Wall, fl oor or ceiling cavity.
• Enclosed space such as an attic or
garage.
• Close proximity to exhaust vents or
chimneys.
Fumes or odor may result.
CAUTION
Risk of Smoke Spillage
Outside air inlet must be located to prevent blockage
from:
• Leaves
• Snow/ice
• Other debris
Blockage may cause combustion air starvation.
NO
Attic space
NO
Outlet placed
higher than 3 ft
below the
termination cap
YES
Clear area
outside
house or in
ventilated
crawl space
Figure 4.1 Outside Combustion Air Placement
Figure 4.2 Locating the Outside Air Control
Heatilator • ST42A • 35038 Rev G • 02/05
Use only duct materials specified
by manufacturer (preferably with
short run or mainly straight duct,
except small dip for cold air trap
which will help prevent flow of cold air.)
open
close
(Push slider to open.)
Factory-built
fireplace
13
Page 14
B. Secure the Fireplace
• Position the Fireplace
This fi replace may be placed on either a combustible or
noncombustible continuous fl at surface. Follow the instructions for framing in Section 3.D. Slide the fi replace
into position. Be sure to provide the minimum air clearance at the sides and back of the fi replace assembly.
See Section 3.B.
WARNING
Fire Risk!
• Prevent contact with sagging, loose
insulation.
• Do NOT install against vapor barriers or
exposed insulation.
• Place the Protective Metal Hearth Strips
WARNING
Fire Risk!
• Metal hearth strips MUST be installed.
Sparks or embers may ignite fl ooring.
1 in. (25 mm) overlap
Metal strips are placed 2 in. (51 mm) under the
front of the fireplace and must extend beyond the
front and sides of fireplace by 2 in. (51 mm).
Figure 4.3 Position the Protective Metal Hearth Strips
Top piece must overlap
bottom piece
Included with your fi replace you will fi nd four metal
hearth strips measuring approximately 28 in. x 4 in.
(711 mm x 102 mm). These strips are used to provide
added protection where the fi replace and the hearth extensions meet.
Slide each metal strip 2 in. (51 mm) under the front
edge of the fi replace. The individual pieces must overlap each other by 1 in. (25 mm) minimum in the middle
of the fi replace to provide continuous coverage of the
fl oor. See Figure 4.3. These metal strips should extend
from the front and sides of the fi replace opening by 2 in.
(51 mm).
Note: When elevating the fi replace above the hearth extension the front of the elevated platform must be protected with
a protective metal hearth strip as shown in Figure 4.4.
• Level the Fireplace
Level the fi replace side-to-side and front-to-back. Shim
with noncombustible material, such as sheet metal, as
necessary. Secure the fi replace (using the nailing fl anges located on either side of the fi replace) to the vertical
framing.
Raised Platform
2 in.
(51 mm)
Floor
2 in.
(51 mm)
Figure 4.4 Protect the Front of an Elevated Platform
1 in. (25 mm) min.
overlap
Important: To ensure proper fi t of the glass doors, check
the fi replace openings for square. Measure diagonal distanc es of e ach opening t o make su r e they ar e e qual. If t h ey
are not, continue to shim the fi replace until those diagonals
are equal.
14
Heatilator • ST42A • 35038 Rev G • 02/05
Page 15
5
Chimney Assembly
5
Chimney must extend
beyond combustible
roof structure
Maintain minimum
height of chimney
above roof
Install roof flashing
according to minimum
requirements
Offsets/returns
may not exceed
30° from vertical
Lock chimney
sections together
firmly to resist
movement
Termination Cap
Additional
support for
tall chimneys
Storm Collar
Maintain minimum
clearances to
combustibles as
specified
Support straps for offsets/
returns must be secured
to adequate framing
Firestop spacers
are required where
chimney passes
through ceiling or
floor
Figure 5.1 Typical Chimney System - Guidelines for Chimney System Installation
NOTE:
• Chimney performance may vary.
• Trees, buildings, roof lines and wind conditions affect
performance.
• Chimney height may need adjustment if smoking or
overdraft occurs.
Heatilator • ST42A • 35038 Rev G • 02/05
15
Page 16
A. Chimney Requirements
Vertical distances are measured from the base of the fi replace as shown in Figure 5.2.
ftmeters
a. Minimum overall straight height14.04.27
b. Minimum height with offset/return16.54.93
c. Maximum height90.027.43
d. Maximum chimney length between an offset and
return
e. Maximum distance between chimney stabilizers35.010.67
f. Double offset/return minimum height22.06.71
g. Maximum unsupported chimney length between the
offset and return
h. Maximum unsupported chimney height above the
fi r e p l a c e
i. Maximum unsupported chimney above roof6.01.83
10.03.05
6.01.83
35.010.67
To determine the chimney components needed to complete
your particular installation, follow the steps below:
• Determine the total vertical height of the fireplace
installation. This dimension is measured from the base of
the fi replace assembly to the point where the smoke exits
the termination cap.
• Subtract the effective height of the fi replace assembly from
the overall height of the fi replace installation (measured
from the base of the fireplace to the bottom of the
termination cap).
• Refer to Table 5.1 to determine what components must
be selected to complete the fi replace installation.
• Determine the number of fi restop spacers, stabilizers,
roof flashing, etc. required to complete the fireplace
installation.
WARNING
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
Table 5.1
HEIGHT OF CHIMNEY COMPONENTSin.mm
Chimney Stabilizer
SL114-3/4121
Firestop Spacers
FS53800
FS54000
Offsets/Returns
SL113014-1/2368
Roof Flashing
RF57000
RF57100
Chimney Sections*
SL11064-3/4121
SL111210 -3 /4273
SL111816 -3 /4425
SL113634-3/4883
SL114 846 -3 /41187
* Dimensions refl ect effective height
i
d & g
firestop
58-7/8 in.
(1495 mm)
Effective
Height
Figure 5.2 Chimney Requirements
h
a,b,c,f
CAUTION
• Do NOT connect this fireplace to a chimney flue
servicing another appliance.
• Do NOT connect to any air distribution duct or
system.
16
Heatilator • ST42A • 35038 Rev G • 02/05
Page 17
B. Using Offsets/Returns
To bypass any overhead obstructions, the chimney may be
offset using a 30-deg (SL1130) offset/return.
An offset and return may be attached together or a chimney
section(s) may be used between an offset and return.
Perform the following steps to determine the correct chimney component combination for your particular installation:
WARNING
Fire Risk
• Draft will be restricted if offset/returns
greater than 30° are used.
Table 5.2
• Measure how far the chimney needs to be shifted to enable
it to avoid the overhead obstacle. See Figure 5.3. Use
dimension “A” to determine chimney section required to
achieve the needed shift.
• After determining the offset dimension, refer to Table 5.2
and fi nd the “A” dimension closest to but not less than the
distance of shift needed for your installation.
• The “B” dimension that coincides with the “A” dimension
represents the required vertical clearance that is needed
to complete the offset and return.
• Read across the chart and fi nd the number of chimney
sections required and the model number of those particular
chimney parts.
• Whenever the chimney penetrates a fl oor/ceiling, a fi restop
spacer must be installed.
• The effective height of the fi replace assembly is measured
from the base of the fi replace to the top of the starter collar.
See Dimensions in Section 12.
AB
SL1106 SL1112 SL1118 SL113 6 SL114 8in.mmin.mm
3-7/89814-1/2 368-----
6-1/415918-5/8 4731----
9-1/423523-3/4 578-1---
12-1/431129737--1--
14- 5 /8 37133838-2---
17-5/8 44838 -1 /4 972-11--
21-1/4 54044-5/8 1133---1-
23-5/8 60048-3/4 12381--1-
27-1/4 69255-3/4 1416----1
29-5/8 7525914991---1
32-5/8 829 64-1/4 1632-1--1
35-5/8 905 69-1/2 1765--1-1
3896573-5/8 1870-2--1
411041 78-3/4 2000-11-1
44-5/8 1133852159---11
47119489-1/8 22641--11
50-5/8 128695-1/2 2426----2
Proper assembly of air cooled chimney parts results in an overlap of chimney joints
of 1-1/4 in. (32 mm). Effective length is built into this table.
A
B
1-1/4 in. (32 mm)
OVERLAP
Figure 5.3 Chimney Offset/Return
Example: Your “A” dimension from Figure 5.3
is 14-1/2 in. (368 mm). Using Table 5.2 the
dimension closest to, but not less than 14-1/2
in. (368 mm) is 14-5/8 in. (371 mm) using a 30°
offset/return. It is then determined from the table
that you would need 33 in. (838 mm) (Dimension
“B”) between the offset and return. The chimney
components that best fi t your application are two
SL1112s.
Heatilator • ST42A • 35038 Rev G • 02/05
17
Page 18
C. Assemble the Chimney Sections
Attach either a straight chimney section or an offset to the
top of the fi replace (depending on your installation requirement). Chimney sections are locked together by pushing
downward until the top section meets the stop bead on the
lower section.
The inner fl ue is placed to the inside of the fl ue section below
it. The outer casing is placed outside the outer casing of the
chimney section below it. See Figure 5.4.
Note: The fi restop spacer MUST be nailed to the bottom
of the ceiling joists EXCEPT when the space above is
uninsulated and the attic insulation shield is not being used
(see Figure 5.5). When the attic insulation shield is used
the spacer may be above or below the joist of an insulated
ceiling.
ROOM ABOVE (non-insulated ceiling)
B
A
Spacer from
bottom
ATTIC ABOVE (insulated ceiling)
Spacer from
top
When attic insulation
shield not used
Figure 5.4 Assembling Chimney Sections
Note: Inner fl ue and outer liner sections cannot be disas-
sembled once locked together. Plan ahead to ensure the
proper installation height is achieved with the selected
chimney components.
WARNING
Fire Risk
Do NOT install substitute or damaged
chimney components.
• MUST use chimney system described in
this manual.
• NO OTHER chimney components may
be used.
Substitute or damaged chimney components
may impair safe operation.
D. Install the Firestop Spacers
• Mark and cut an opening in the ceiling for the spacer being
used. See Figure 5.5.
• Frame the opening with the same size lumber used in the
ceiling joists.
• Install the fi restop spacer.
Note: Use same dimensional lumber for framing
spacer and joists.
AB
Catalog #
FS5381743217432
FS5401743226660
Figure 5.5 Installing the Firestop Spacer
in.mmin.mm
Note: You must provide support for the pipe during construction and check to be sure inadvertent loading has not
dislodged the chimney section from the fi replace or at any
chimney joint.
CAUTION
• Firestop spacers must be used at ceiling/fl oor.
• Chase construction requires fi restops at each fl oor or
every 10 ft (3.05 m) of clear space.
• Use same dimensional lumber as joists.
Firestop slows spread of fire and reduces cold air
infi ltration.
18
Heatilator • ST42A • 35038 Rev G • 02/05
Page 19
E. Install the Attic Insulation Shield
An insulation shield must be installed when there is a possibility of insulation coming into contact with the factory built
chimney system.
• Bend the tabs at the top of the attic insulation shield inward.
This will help keep the chimney section centered in the
shield.
• Position the shield over the vertical chimney section where
it penetrates a fi restop spacer.
• Slide the shield down until it rests on the fi restop spacer.
The fi restop spacer will support the insulation shield. See
Figures 5.6 and 5.7.
WARNING
Fire Risk
• DO NOT pack insulation or other
combustibles: between fi restops; between
chimney and attic insulation shield.
• ALWAYS maintain specifi ed clearances
around chimney and fi restop systems.
• Install fi restops as specifi ed.
Failure to keep insulation or other material
away from chimney pipe may cause fi re.
Ta bs
17 in.
24 in.
(610 mm)
Insulation
13 in.
(330 mm)
Figure 5.6 Install Attic Insulation Shield Above the Ceiling
17 in.
(423 mm)
Insulation
24 in.
(610 mm)
(423 mm)
Firestop Spacer
Chimney
Insulation
Tabs
Attic
Shield
Attic
Insulation
Shield
F. Double-check the Chimney Assembly
Continue assembling the chimney sections up through the
fi restop spacers as needed. While doing so, be aware of
the height and unsupported chimney length limitations given
under Section 5.A. Chimney Requirements.
Check each section by pulling up slightly from the top to ensure proper engagement before installing the succeeding
sections. If they have been connected correctly, they will not
disengage when tested.
G. Secure the Chimney
When offsets and returns are joined to straight pipe sections,
they must be locked into position with the screws provided*
(outer only), using the predrilled holes. To prevent gravity
from pulling the chimney sections apart, the returns and the
chimney stabilizers have hanger straps for securing these
parts to joists or rafters. See Figure 5.8.
* or equivalent #6 or #8 sheet metal screw no longer than
3/4 in. (19 mm).
WARNING
Fire Risk
• Secure offsets with screws.
• Secure returns with strapping.
Keep chimney sections from separating or
twisting.
13 in.
(330 mm)
Chimney
Figure 5.7 Install Attic Insulation Shield Below the Ceiling
Firestop Spacer
FIRESTOP
STRAPS
JOINT
BAND
OPTIONAL
(OPTIONAL)
ADDITIONAL
SUPPORT
Figure 5.8 Secure the Chimney
Heatilator • ST42A • 35038 Rev G • 02/05
19
Page 20
6
Complete the Enclosure
6
A. Chimney Termination
Chimney Termination Requirements (See Figures 6.1 and 6.2)
• Must have a cap approved and listed for this fi replace system
• Must not be located where it will become plugged by snow or other material
• Must terminate at least 3 ft (914 mm) above the roof and at least 2 ft (610 mm) above any portion of the roof within 10 ft
(3.05 m).
• Must be located away from trees or other structures
Slanted Roofs
Chimney must
extend 3 ft (.9 m)
above the roof
Flat Roofs
Chimney must
extend 3 ft (.9 m)
above the roof
Chimney must extend 2 ft (.6 m)
above any portion of the roof
within 10 ft (3 m) of the chimney
Chimney must extend 2 ft (.6 m)
above any portion of the roof
within 10 ft (3 m) of the chimney
Gas
Termination
Gas Termination Wood & Fuel Oil Termination
A 6 in.
Gas, Wood or Fuel
Oil Termination
18 in.
(457 mm)
A
(152 mm) 20 in. (508 mm)
20 in.
(508 mm)
(minimum) to
Perpendicular
Wall
(gas only)
Figure 6.1 Termination Requirements
Mark the Exit Point of the Roof
Locate the point where the chimney will exit the roof by plumbing down to the
center of the chimney. Drive a nail up through the roof to mark the center. See
Figure 6.3.
Cut Out the Hole in the Roof
Measure to either side of the nail and mark the 17 in. x 17 in. (432 mm x 432 mm)
or 17 in. x 26 in. (432 mm x 660 mm) opening required. This is measured on
the horizontal; actual length may be larger depending on the pitch of the roof.
Cut out and frame the opening. See Chapter 25 of the Uniform Building
Code for roof framing details.
WARNING
Fire Risk
• Must maintain 2 in. (51 mm) air clearance
to insulation and other combustible
materials.
Assemble the Chimney Sections Through the Roof
Continue to add chimney sections through the roof opening, maintaining at
least a 2 in. (51 mm) air space to combustible materials.
Figure 6.2 Multiple Chimneys
Install the Roof Flashing
If a roof fl ashing is to be used, install the roof fl ashing appropriate to the
roof pitch and install a round termination cap and storm collar following the
instructions shipped with the cap.
20
Heatilator • ST42A • 35038 Rev G • 02/05
Figure 6.3 Ceiling/Attic Construction
Page 21
Install the Chimney Air Kit (required in Canada):
When installing the chimney air kit, follow the instructions
provided with this accessory.
B. Chase Top
A metal chase top is required to seal the top of the chase
around the chimney pipe. The top should include a turndown and drip edge to prevent water from seeping into the
chase. Provide a 1/8 in. (3 mm) gap around the fl ue pipe
and slope the top downward away from the penetration. See
Figure 6.4.
• All seams must be caulked to prevent leaks.
• A chase installation must use a chase top. Chase tops
are available from your Heatilator dealer or may be fi eld
constructed.
• Attach the chase top to the top of the chase.
Termination Cap
2 in. (51 mm) Collar
Caulk
on Chase Top
Storm Collar
Figure 6.4 Chase Top Construction
Slope Downward
Turn-down
Drip Edge
Chase
(Chimney)
.018 (26 ga) min.
Galvanized
Chase Top
Heatilator • ST42A • 35038 Rev G • 02/05
21
Page 22
C. Install the Termination Cap
• Install the chimney sections up through the chase
enclosure. When using a TR11 Round Termination Cap,
the uppermost top section of pipe must extend 6 in.
(152 mm) above the top of the fl ashing collar to allow
installation of the storm collar and termination cap. See
Figure 6.5.
• For installations utilizing a TR11T Round Telescoping
Termination Cap, the uppermost chimney section must
be below the top of the chase top, but not more than
14 -1/2 in. (368 mm) below the top of the chase top.
Minimum overlap of chimney and termination cap must
be 1-1/2 in. (38 mm). See Figure 6.6.
• For installations utilizing an ST1175 Square Termination
Cap the last chimney section must not be more than
4-1/2 in. (114 mm) below the chase top. See Figure 6.7.
•
For installations utilizing an TCT1175 Terra Cotta Cap the
last chimney section must be between 7 in. (178 mm) below
the chase top and 2 in. (51 mm) above. See Figure 6.8.
• For chase installations you can use a TR11 Round
Termination Cap, a TR11T Round Telescoping Termination
Cap, an ST1175 or a TCT1175 Terra Cotta Termination
Cap.
• Install the termination cap following the instructions
provided with it.
Note: To protect against the effect of corrosion on those
parts exposed to the weather, the termination cap can be
painted with a rust-resistant paint.
WARNING
Fire Risk
• The minimum overlap of cap to pipe
MUST be met or chimney may separate
from cap.
Separation allows sparks, heat and embers
to escape.
Flashing Collar
Cap Standoff
1-1/2 in.
(38 mm) min.
overlap
Figure 6.7 Installing an ST1175 Square Termination Cap
Top of Pipe
2 in. (51 mm) min.
4-1/2 in.
(114 mm)
max.
Minimum 1-1/2 in. (38 mm) overlap of cap over pipe
Storm Collar
2 in. (51 mm) min.
6 in. (152mm) min.
Flashing Collar
Figure 6.5 Installing a TR11 Round Termination Cap
Storm Collar
Flashing Collar
2 in. (51 mm) min. collar
2 in. (51 mm) min.
14-1/2 in. (368mm) max.
The last section of pipe
must stop between the
1-1/2 in. (38 mm)
min. overlap
distances given below.
2 in. (51 mm) above top
{
7 in. (178 mm) below top
Top of Pipe
Figure 6.8 Installing a TCT1175 Terra Cotta Cap
of the chase.
of the chase.
Top of Pipe
Figure 6.6 Installing a TR11T Round Telescoping Termination
22
1-1/2 in. (38 mm) min.
overlap
Heatilator • ST42A • 35038 Rev G • 02/05
Cap
Page 23
7
Accessories
A. Gas Log/Lighter Provisions
A certifi ed gas log lighter or decorative gas log set can be
installed in this fi replace.
• Maximum input is 100,000 BTU/hr.
• Decorative gas appliance must be certifi ed to ANSI Z21.60
“Standard for Decorative Gas Appliances for Installation
in Vented Fireplaces”.
• Must be installed in accordance with the National Fuel
Gas Code, ANSI Z223.1-1980.
• A log set must incorporate a gas shutoff.
• Log set requires the damper to be locked fully open.
Knockouts are provided on both sides of the fi replace and in
refractories for 1/2 in. (13 mm) iron pipe.
• We recommend you seal refractory around pipe with
fi replace mortar or cement.
• Repack insulation from the knockout around the pipe.
• Maintain 1-1/2 in. (38 mm) air space around the pipe for
4 in. (102 mm) beyond the fi replace.
• See Figure 7.1.
Outer Shell
Firebox
of Fireplace
Maintain air clearance
to combustibles.
WARNING
Asphyxiation Risk
• Damper must be locked open when gas logs
installed.
Gas fi re generates fumes.
WARNING
Fire Risk
• For use with solid wood fuel or decorative
gas appliance only.
• DO NOT install unvented gas logs.
WARNING
Fire Risk
Explosion Risk
Inspect appliance and components for
damage. Damaged parts may impair safe
operation.
• Do NOT install damaged components.
• Do NOT install incomplete components.
• Do NOT install substitute components
Report damaged parts to dealer.
Refractory
Seal with
fireplace mortar
or cement
Gas Line
Repack
Insulation
Knockout
Figure 7.1 Gas Line Installation
Gas Line
4 in.
(102 mm)
Combustible
Materials
1-1/2 in.
(38 mm)
air space
Combustible materials
may be located at zero
clearance to gas line
beyond 4 in. (102 mm)
from fireplace side.
Heatilator • ST42A • 35038 Rev G • 02/05
23
Page 24
8
Finishing
A. Hearth Extension
A hearth extension must be installed with all fi replaces to
protect the combustible fl oor in front of the fi replace from
both radiant heat and sparks. See Figures 8.1 -8.3.
High temperature
(300°F min.) continuous,
HX3 or HX4
Hearth Ext
or equivilent
insulation
(see Table below)
Floor constructed of wood or
other combustible material
Figure 8.1 Hearth Extension Construction
non-combustible sealant
Tile, stone or other
non-combustible material
2 in. (51 mm)
required
Protective
Fireplace
Metal Hearth
Strip
WARNING
Fire Risk
• Metal hearth strips MUST be installed.
Sparks or embers may ignite fl ooring.
1 in. (25 mm) overlap
Metal strips are placed 2 in. (51 mm) under the
front of the fireplace and must extend beyond the
front and sides of fireplace by 2 in. (51 mm).
Figure 8.2 Positioning the Protective Metal Hearth Strips
WARNING
This fi replace has been tested and approved for use with a
hearth extension insulated to a minimum R value of 1.16.
To substitute materials for the factory-available hearth extensions, see Figure 8.3 and calculate insulation alternatives
as per Table 8.1 and the following formulas:
• Thermal conductivity per inch thickness = k
• k = (BTU)(inch) / (foot2)(hour)(°F)
• Required thickness = Rk
• Thermal resistance per inch thickness = r
• r = (foot2)(hour)(°F) / (BTU)(inch)
• Required thickness = R / rB.
Table 8.1
Hearth Extension Insulation Alternatives, R Value = 1.16
Minimum
Material
Hearth & Home HX3, HX40.432.331/2 in.
USG Micore 300™0.462.181/2 in.
USG Durock™ Cement Board1.920.522-1/4 in.
Cement Mortar5.00.205-7/8 in.
Common Brick5.00.205-7/8 in.
Ceramic Tile12.500.0814-5/8 in.
Armstrong™ Privacy Guard Plus
Marble14.3-20.00.07-0.0516-5/8 in. - 23-3/8 in.
k per inch
thick
.0462.181/2 in.
r per inch
thick
thickness
required
Fire Risk
• Hearth extensions must be installed
exactly as specifi ed.
High temperatures or hot embers may ignite
concealed combustibles.
A
Model #ABC
HX4
Figure 8.3 Hearth Extension Dimensions
in.662012
mm1676508305
C
B
24
Heatilator • ST42A • 35038 Rev G • 02/05
Page 25
B. Finishing Material
• Combustible Material
Material which is made of or surfaced with wood,
compressed paper, plant fi bers, plastics, or any material
capable of igniting and burning, whether fl ame proofed or
not, plastered or not plastered.
• Non-Combustible Material
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
• Non-Combustible Sealant Material
Sealants which will not ignite and burn: Rutland, Inc.
Fireplace Mortar #63 (or equivalent).
After completing the framing and applying the facing material
(drywall) over the framing, a bead of non-combustible sealant must be used to close off any gaps at the top and sides
between the fi replace and facing to prevent cold air leaks.
Large gaps can be bridged with fi berglass rope gasket.
Only non-combustible materials may be used to cover the
metal fi replace fronts.
WARNING
Fire Risk
• Use only non-combustible material below
standoffs.
• Material such as cement board is
acceptable.
WARNING
Fire Risk
Do NOT obstruct air inlet or outlet grilles.
Do NOT modify grilles.
• Modifying or covering grilles could cause
temperature rise and fi re hazard.
Finishing materials must not interfere with:
• Air fl ow through grilles or louvers
• Operation of louvers or doors
• Access for service
D. Sidewalls/Surrounds
Adjacent combustible side walls must be located a minimum
of 12 in. (305 mm) from the fi replace opening. If you are using a decorative surround constructed of combustible material, it must be located within the shaded area defi ned in
Figure 8.5. Short stub walls are also acceptable if they are
contained within the shaded area.
E. Glass Doors
This fi replace has been tested and listed for use with doors
as specifi ed in Section 12.B. Fireplace Components. Please
refer to the manual packed with each set of doors for installation instructions.
WARNING
C. Mantel
A combustible mantel may be positioned no lower than
12 in. (305 mm) above the top of the fi replace openings. The
combustible mantel may have a maximum depth of 12 in.
(305 mm). Combustible trim pieces that project no more than
1 in. (25 mm) from the faces of the fi replace can be placed
no closer than 6 in. (152 mm) from the top of the fi replace
openings. See Figure 8.4. Combustible trim must not cover
the metal surfaces of the fi replace. This mantel clearance is
in accordance with Section 7-3.3.3 of ANSI/NFPA211.
12 in.
(305 mm)
max.
12 in.
(305 mm)
min.
Gas
Knockout
14-3/8 in.
(365 mm)
50 deg.
Fire Risk
Finish all edges and fronts to clearances and
specifi cations.
• Metal fi replace front may be covered with
non-combustible material only.
• Do NOT overlap combustible materials onto
fi replace fronts.
• Install combustible materials up to specifi ed
clearances on top, front and side edges.
• Seal joints between the fi nished wall and
fi replace top and sides using only a 300° F
minimum sealant.
Flush
Front
12 in.
(305 mm)
Brick
Front
42 in.
(1067 mm)
(opening)
48 in.
(1219 mm)
(framing)
12 in.
(305 mm)
4 in.
(102 mm)
9-3/4 in.
(248 mm)
37 deg.
Figure 8.4 Mantel Specifi cations
Figure 8.5 Sidewalls/Surrounds
Heatilator • ST42A • 35038 Rev G • 02/05
25
Page 26
9
Operating Instructions
WARNING
Fire Risk
• Do not operate fireplace before
reading and understanding operating
instructions.
Failure to operate fi replace properly may
cause fi re.
A. General Information
Fireplaces, as well as other woodburning appliances, have
been used safely for many years. It has been our experience
that most problems are caused by improper installation and
operation of the fi replace. Make certain that installation and
operation of the fi replace system is in accordance with these
instructions.
It is extremely important that the fi re be supervised whenever the fi replace is in use. It is also recommended that an
annual inspection be performed on the fi replace system to
determine if the fl ue system needs to be cleaned, or as in
the case of any appliance, if minor repairs are required to
maintain the system in top operating condition.
WARNING
HOT! DO NOT TOUCH.
SEVERE BURNS MAY RESULT.
CLOTHING IGNITION MAY RESULT.
Glass and other surfaces are hot during
operation and cool down.
• Keep children away.
• CAREFULLY SUPERVISE children in same room as
fi replace.
• Alert children and adults to hazards of high
temperatures.
• Do NOT operate with protective barriers removed.
• Keep clothing, furniture, draperies and other
combustibles away.
WARNING
Fire Risk
• For use with solid wood fuel or decorative gas
appliance only.
• Do not install unvented gas logs.
26
Air Kit Handle Location
(just above stone)
open
close
Figure 9.1 General Operating Parts
Heatilator • ST42A • 35038 Rev G • 02/05
open
CLOSE
Damper
Handle
Page 27
B. Outside Air
A source of air (oxygen) is required in order for combustion
to take place. Whatever air is consumed by the fi re must be
replaced through cracks around windows, under doors, etc.
Most newly constructed houses or existing homes fi tted with
tightly sealed doors and windows are relatively air tight. In
this case, an outside air source must be made available to
feed combustion air from outside the home.
An outside air control handle allows you control of the outside air inlet if your fi replace is equipped with this option.
Use of outside air for combustion is highly recommended to
conserve heated air within the structure and to provide make
up air to keep the fi replace venting properly.
This fi replace will operate correctly only if adequate ventilation is provided to allow proper draft to the fi replace system.
See Figure 9.1 for location and operation.
CAUTION
Outside air control handles are HOT. Adjust before lighting
fi re.
C. Clear Space Near the Fireplace
Combustible materials must not be stored on the hearth extension. Room furnishings such as drapes, curtains, chairs
or other combustibles must be at least 4 ft (1.22 m) from the
open fronts of the fi replace.
E. Firescreen
A fi rescreen is always provided to control sparks. It must
be closed whenever the fi replace is in use. Glass doors or
fi rescreens must not be used to hold burning material inside the fi replace. Only those glass doors specifi cally tested
and listed for use with the specifi c fi replace model should be
used. Screens should be closed when the glass doors are
closed.
WARNING
Fire Risk
• Close fi rescreen when burning fi replace.
• Do not use fi rescreen or glass doors to
hold burning material in fi replace.
Firescreen controls sparks.
Glass may break or burning material may
roll out.
F. Glass Doors
Most effi cient fi replace operation using glass doors is with
the doors open. When the doors are open the screen must
be closed. Only Hearth & Home Technologies glass doors
may be used. See Figure 9.2 for proper glass door operation.
FULLY OPEN
CORRECT
PART LY OPEN
INCORRECT
D. Flue Damper
The fl ue damper must be in full open position, and is operated by moving the handle up toward the top of the fi replace.
Before lighting the fi re, verify this by looking up from the inside of the fi replace. Always operate this fi replace with the
damper fully open. Please note: Down drafts, obstructions,
damaged or poor (wet) fuels can cause smoke spillage.
See Figure 9.1 for location and operation.
WARNING
Asphyxiation Risk
Fire Risk
• Open damper to operate fi replace.
Closed damper will over-fi re fi replace and
prevent venting of combustion gases.
FULLY CLOSED
CORRECT
Figure 9.2 Proper Operating Positions of Bi-fold Doors
PART LY CLOS E D
INCORRECT
WARNING
Fire Risk
Smoke Risk
• Doors must be fully opened or fully closed
when operating fi replace.
Partially opened doors may draw fl ame, smoke
or heat from fi replace.
Heatilator • ST42A • 35038 Rev G • 02/05
27
Page 28
G. Grate
The factory installed integral grate must be used to hold the
logs from falling out of an open fi replace and to allow air to
pass between the burning logs. It is important to keep the fi re
off the hearth and to allow the ashes to collect beneath the
fi re, thereby forming a layer of additional heat protection.
WARNING
Fire Risk
• Use only factory installed integral grate.
May cause overfi re.
H. Wood Fuel
Firewood
Your fi replace performance depends on the quality of the
fi rewood you use. All seasoned wood, regardless of species, contains about 8,000 BTU’s per pound, and hardwoods have a greater density than soft woods. A piece
of hardwood will contain about 60% more BTU’s than
an equal size piece of soft wood. Firewood is commonly
sold by the cord (128 cu. ft.). A cord of seasoned oak
(hardwood) would contain about 60% more potential energy than a cord of seasoned pine (soft wood).
Examples of soft wood trees are Douglas fi r, pine, spruce,
and cedar, poplar, aspen and alder. Soft woods require
less time to dry, burn faster and are easier to ignite than
hardwoods.
Examples of hardwood trees are oak, maple, apple, and
birch. Hardwoods require more time to season, burn
slower and are usually harder to ignite than soft woods.
The best wood fuel is a combination of soft wood and
hardwood. Start the fi re with soft wood; the fi re will give
off quick heat to bring the fi replace up to operating temperature, and then the hardwood can be added for slow,
even heat and longer burn time.
Moisture
Regardless of which species of wood you burn, the single
most important factor that effects the way your fi replace
operates is the amount of moisture in the wood. The majority of the problems fi replace owners experience are
caused by trying to burn wet, unseasoned wood.
Freshly cut wood can be as much water as it is wood,
having a moisture content of around 50%. Imagine a
wooden bucket that weighs about eight pounds. Fill it
with a gallon of water, put it in the fi replace and try to burn
it. This sounds ridiculous but that is exactly what you are
doing if you burn unseasoned wood.
Seasoning
Seasoned fi rewood is nothing more than wood that is
cut to size, split and air dried to a moisture content of
around 20%. The time it takes to season wood varies
from around nine months for soft woods to as long as
eighteen months for hardwoods. The key to seasoning
wood is to be sure it has been split, exposing the wet
interior and increasing the surface area of each piece. A
tree that was cut down a year ago and not split is likely
to have almost as high a moisture content now as it did
when it was cut.
The following guideline will ensure properly seasoned
wood:
• Stack the wood to allow air to circulate freely around
and through the woodpile.
• Elevate the woodpile off the ground to allow air
circulation underneath.
• The smaller the pieces, the faster the drying process.
Any piece over 6 in. (152 mm) in diameter should be
split.
• Cover the top of the woodpile for protection from
rain and snow. Avoid covering the sides and ends
completely. Doing so may trap moisture from the
ground and impede air circulation.
The problems with burning wet, unseasoned wood are
twofold: First, you will receive less heat output from wet
wood because it requires energy in the form of heat to
evaporate the water trapped inside. This is wasted energy that should be used for heating your home. Secondly,
this moisture evaporates in the form of steam which has
a cooling effect in your fi replace and chimney system.
When combined with tar and other organic vapors from
burning wood it will form creosote which condenses in
the relatively cool fi replace and chimney.
WARNING
Fire Risk
• Do NOT burn wet or green wood.
• Store wood in dry location.
• Stack wood so both ends are exposed to
air.
Wet, unseasoned wood can cause
accumulation of creosote.
WARNING
Fire Risk
Do NOT store wood:
• Closer than required clearances to
combustibles to fi replace.
• Within space required for loading or ash
removal.
28
Heatilator • ST42A • 35038 Rev G • 02/05
Page 29
I. Starting a Fire
Check the fl ue damper to be certain it is in the full open position. Place crumpled or twisted paper under the fi replace
grate. Loosely arrange kindling or small pieces of wood to
form a layer above the paper.
The fi res must be built on the fi replace grate, without danger
of the burning fuel falling out of the fi replace opening.
Light the paper and add small pieces of wood until a hot bed
of embers has been established.
After establishing the fi re bed, and the small fi rewood is burning briskly, add a minimum of three average sized pieces of
split fi rewood, place the wood in such a manner to allow
combustion air and fl ames between them.
Note: When fi rst lighting your fi replace, it may be necessary to pre-warm the fl ue to establish a draft. This is done
by holding a rolled up piece of burning newspaper under
the fl ue damper for a few moments. This will help reduce
smoke spillage during start-up.
Note: The fi rst three or four fi res should be of moderate
size to allow the oils and binders to be burned from the
fi replace and the refractory and paint to cure. You may
notice an industrial odor the fi rst few fi res. This is considered normal.
CAUTION
Odors and vapors released during initial
operation.
• Curing of high temperature paint.
• Open windows for air circulation.
Odors may be irritating to sensitive individuals.
WARNING
Fire Risk
Keep combustible materials, gasoline and
other fl ammable vapors and liquids clear of
fi replace.
• Do NOT store fl ammable materials close
to the fi replace.
• Do NOT use gasoline, lantern fuel,
kerosene, charcoal lighter fl uid or similar
liquids to start or “freshen up” a fi re in this
fi replace.
• Keep all such liquids well away from the
fi replace while it is in use.
Combustible materials may ignite.
Heatilator • ST42A • 35038 Rev G • 02/05
29
Page 30
10
Troubleshooting
This fi replace will operate correctly only if adequate ventilation is provided to allow proper draft to the fi replace system.
Hearth & Home Technologies assumes no responsibility for
the improper performance of the fi replace system caused
by inadequate draft due to environmental conditions, down
drafts, tight sealing construction of the structure, or mechanical exhausting devices which will create a negative air pressure within the structure where the fi replace is located.
A. Understanding Vent Problems
If smoke spillage occurs from a fi replace opening when the
door is open and the proper chimney height, fl ue size, and
confi guration requirements for the installation have been
met, there is either a leakage in the fl ue, a blockage in the
?
n
o
i
t
a
n
i
m
r
e
t
y
e
n
m
i
h
c
d
n
u
o
r
a
s
d
n
i
w
g
n
o
r
t
S
Another appliance in
home also exhausting
air (furnace, fan,
dryer, etc.)?
Unsealed
can lights?
fl ue, or some condition is in effect to draw smoke from the
fi replace into the house. Understanding and differentiating
the conditions which can cause each of these kinds of spillage problems is essential to their solution.
• Flue Leakage
Check for improperly connected fl ue joints or a damaged
fl ue joint in the chimney system. Such leakage would
reduce draft (air would be drawn in through the leaks rather
than through the fi replace). The result might be diffi cult
start-up and smoky fi res that might spill if other adverse
draft conditions accompany this problem.
• Flue Blockage
The damper should be open.
Overhanging
tree?
Bird's nest
or leaves in
termination
cap?
Structural
changes in
chimney area?
Overhead fan
operating?
Air register from
furnace near
fireplace?
Doors opening
and closing?
Window closed
for start-up?
I can’t get a good fi re going. What am I doing wrong?
Diagnostic QuestionsPossible Causes of ConditionSolutions
Is the damper open?• No draftOpen damper.
Is there enough paper/starter?• Insuffi cient heat to ignite kindlingUse more paper/starter.
Is there enough kindling?
Is the kindling dry?
Is there enough or too much
wood? Is it too large? Is it dry
enough?
Are there adequate air spaces
between fuel pieces?
Is the chimney pre-warmed?• Exposed, cold chimney down draftingUse lighted rolled newspaper at throat or fl ue opening to start
Is there smoke in the house?• Damper closedCheck damper; have chimney checked if it worked previously;
Does the kindling, wood not
ignite?
Does the kindling ignite, but the
fuel doesn’t?
Does the fuel ignite, but not
burn well?
• Insuffi cient heat to ignite fuelUse more dry kindling.
• Insuffi cient heat to establish draftUse small split wood that is well seasoned (split, covered on top at
• Insuffi cient air passage
• Insuffi cient surface area
• Ignition temperature high due to moisture
• Insuffi cient combustion air and exposed
surface area
• Obstruction in chimney
• Downdraft from chimney temperature or
from negative house pressure
• Condition, amount, arrangement of kindling
and fuel
• Amount of kindlingUse more kindling; use smaller, dry wood.
• Condition of fuel
• Condition of fuelUse well-seasoned wood and suffi cient amount; turn exhaust fans
• Draft problem
least 6 months, preferably a year).
Arrange kindling and wood for air movement.
upward movement.
pre-warm chimney, shut off exhaust devices, open window slightly.
Use more, drier, well-spaced kindling and fuel.
off; open window slightly. Perform Simplifi ed House Pressure Test.
I don’t get enough/any heat from the fi replace. What can I do about it?
Diagnostic QuestionsPossible Causes of ConditionSolutions
How much wood is used for
fi re?
How well seasoned is the
wood?
Do you have a blower (where
possible)?
How much heat output do you
expect?
• Insuffi cient fuelMake larger fi res.
• Condition of fuelBurn seasoned wood: covered on top, split and stacked for 9
• Yes: Turning blower on too early or setting
too high, cooling fi rebox
No: Need for all heat boosts possible
• Unrealistic expectationsExplanation of decorative nature of fi replace; suggestion of
months to 2 years.
Yes: Wait until fi re established and leave on lower speed.
No: Add blower if available.
approved fi replace insert.
Heatilator • ST42A • 35038 Rev G • 02/05
31
Page 32
The fi replace burns the wood too fast. What can I do?
Diagnostic QuestionsPossible Causes of ConditionSolutions
Do you have glass doors?• Need to slow air intakeAdd glass doors.
What is the condition of the
wood?
• Extremely dry woodMix in less seasoned wood after fi re established.
I smell smoke in the house during operation. What’s causing that?
Diagnostic QuestionsPossible Causes of ConditionSolutions
Does the fi re start and burn
well?
No:
• Damper not fully openOpen damper; check and clean chimney if needed; use adequate
• Chimney obstruction
• Not enough kindling and/or fuel to establish
draft
• Inadequate combustion air
Yes:
• Fire too close to frontBuild fi re farther back. Do not use exhaust fans during startup
• Competition with exhaust devices
kindling and fuel; open glass doors or open window, check for
need for balanced air make-up.
and/or check for need for balanced air make-up system.
I smell smoke in the house after we’ve had a fi re in the fi replace. What is the cause/what can we do?
Diagnostic QuestionsPossible Causes of ConditionSolutions
Is the damper closed?• No: Downdraft or negative pressureClose the damper at end of burn.
• Yes: Negative pressure from exhaust fans
and/or house stack effect.
Check for need for glass doors. Check for need for balanced air
make-up system or raising chimney.
Is the chimney clean?• No: Creosote odorHave chimney cleaned.
• Yes: Damper closed too earlyWait until fi re completely out before closing damper.
32
Heatilator • ST42A • 35038 Rev G • 02/05
Page 33
11
11
Maintenance and Servicing the Fireplace
A. Disposal of Ashes
Ashes should be placed in a metal container with a tight-fi tting lid. The closed container of ashes should be placed on
a noncombustible fl oor or on the ground, well away from all
combustible materials, pending fi nal disposal. If the ashes
are disposed of by burial in soil or otherwise locally dispersed, they should be retained in the closed container until
all embers have thoroughly cooled.
WARNING
Fire Risk
Disposal of ashes
• Ashes should be placed in metal container with tight
fi tting lid.
• Do not place metal container on combustible
surface.
• Ashes should be retained in closed container until all
embers have thoroughly cooled.
WARNING
B. Chimney Inspection/Cleaning
Inspect the chimney internally for obstructions and construction damage. Flue pipe joints and seams must be continuous and mechanically tight.
The chimney should be inspected once every two months
during the heating season.
If creosote has accumulated, it should be removed to reduce
the risk of a chimney fi re.
Refer to Figure 11.1 to remove/reinstall termination caps.
C. Firebox Refractory
Check fi rebox refractory for excessive cracks or gaps. If
cracks exceed 1/4 in. (6 mm) in width the refractory should
be replaced. See Section 12 for replacement information.
• Inspect chimney once every two months during heating
season.
• Remove creosote to reduce risk of chimney fi re.
• Ignited creosote is extremely HOT.
Remove 4 screws
Remove screws,
lift top cover.
Chimney
TR11/TR11T
Round Termination Cap
Top Cover
Cap
Slip
Section
and lift top pan off.
Cap
Square Termination Cap
Note: As you use the fi replace, expansion and contraction
will cause minor cracking of the refractory. This is normal,
unavoidable, and will not affect the performance of the
fi replace. If the cracks become large enough that the metal
behi n d t h e refractor y i s exposed or large p i e c es fall o u t , t h e
panels should be replaced.
Remove 2 screws from
the front and back and
lift the top off.
ST1175
TCT1175
Terra Cotta
Termination Cap
Figure 11.1 Chimney & Termination Cap Cleaning
Heatilator • ST42A • 35038 Rev G • 02/05
33
Page 34
CAUTION
WARNING
Handle glass assembly with care.
When cleaning glass door:
• Avoid striking, scratching or slamming
glass.
• Do NOT use abrasive cleaners.
• Use a hard water deposit glass cleaner on
white fi lm.
• Do NOT clean glass when it is hot.
Asphyxiation Risk
Fire Risk
Annual inspection by qualified technician
recommended.
Check:
• Condition of doors, surrounds and fronts
• Condition of glass and glass assembly
• Obstructions of combustion and ventilation
air
WARNING
Fire Risk
• Do not use chimney cleaners or fl ame
colorants in your fi replace.
Will corrode chimney.
• Gas connections and fi ttings (if present)
• Obstructions of termination cap
• Refractory panels
Clean:
• Glass
• Air passageways, grilles
D. Maintenance Task List
InspectMaintenance Tasks
Screens1. Assess condition of screen and replace as necessary. Screens are required.
2. Verify maintenance of proper clearance to combustible household objects.
Glass Doors1. Inspect glass panels for cracks. Replace if this condition is present.
2. Confi rm there is no damage to glass or glass frame. Replace as necessary.
Circulation Compartment 1. Remove any foreign objects.
2. Verify unobstructed air circulation.
Firebox1. Inspect condition of refractory. Replace if crumbly, deteriorated, or if cracks exceed 1/4 in. (6 mm).
Chimney1. Inspect for blockage or obstruction such as bird nests, leaves, etc.
2. Confi rm that termination cap remains clear and unobstructed by plants, etc.
3. Verify that termination cap clearance to subsequent construction (building additions) has been maintained.
4. Inspect for corrosion or separation.
5. Verify weather stripping, sealing and fl ashing remain intact.
6. Inspect for creosote and remove as needed. (See Sections 10 and 11)
Grate1. If grate burns out, it should be replaced only with the grate specifi ed on the rating plate and in the
replacement parts list for this fi replace.
E. Chimney Fire
In the event of a chimney fi re:
• Have the chimney and adjacent structure inspected by
qualifi ed professionals. Hearth & Home Technologies
recommends that NFI or CSIA certifi ed professionals, or
technicians under the direction of certifi ed professionals,
conduct a minimum of an NFPA 211 Level 2 inspection of
the chimney.
34
Heatilator • ST42A • 35038 Rev G • 02/05
• Replace components of the chimney and fi replace as
specifi ed by the professionals.
• Ensure all joints are properly engaged and the chimney
is properly secured.
A chimney fi re can permanently damage your chimney system. Failure to replace damaged components and make
proper repairs creates risk of fi re.
Page 35
12
Reference Materials
A. Fireplace Dimensions
28 in.
(711 mm)
47 in.
(1194 mm)
14 in.
(356 mm)
23-1/2 in.
(597 mm)
13 in.
[330 mm]
dia.
8-3/8 in.
(213 mm)
Outside
Gas
Knockout
14 in.
(356 mm)
Air
8-5/8 in.
(219 mm)
38-3/8 in.
(975 mm)
11-3/4 in.
(298 mm)
39-1/8 in.
(994 mm)
58-7/8 in.
(1496 mm)
(effective height)
42 in.
(1067 mm)
23 in.
(585 mm)
7-1/2 in.
(192 mm)
39-1/8 in.
(995 mm)
39-1/8 in.
(994 mm)
8-3/8 in.
(213 mm)
Gas
Knockout
14 in.
(356 mm)
Heatilator • ST42A • 35038 Rev G • 02/05
35
Page 36
B. Fireplace Components
Model #Description
ST42AFireplace with integral grate, outside air kit and hearth protection strips
ROOFED STYLE with 12 X 22 (264 sq. in.) opening on each side and 3 in. space between the
radiation shield and chase top.
Minimum Base Dimensions
(Inches)
Minimum Height (Inches)N/A23232323
Minimum Height is measured from the bottom of the termination cap:
Minimum height is established with the bottom of the termination cap 7 in. above the chase top. Minimum height must increase
accordingly for any height above 7 in.
N/A
27 X 27 with
Radiation Shield
27 X 27 with
Radiation Shield
34 X 34 with
Radiation
Shield
34 X 34 with
Radiation Shield
40
Heatilator • ST42A • 35038 Rev G • 02/05
Page 41
D. Service Parts
Service Parts
Exploded Parts Diagram
ST42A
6
3
ST42
Beginning Manufacturing Date: N/A
Ending Manufacturing Date: Active
2
9
1
10
11
8
7
4
5
(SIDE OF FIREPLACE)
12
Heatilator • ST42A • 35038 Rev G • 02/05
41
Page 42
Service Parts
ST42
Service Parts List
ST42A
#Description of PartST42A Qty.
11Ashl i p16674B2
Damper Blade22891A1
Damper Control16663A1
Damper Rod13230A1
5Door Support16697D2
4Face, Lower Front12848D2
3Face, Upper Front16687E2
6Firescreen Assembly124134
HTL Logo Screen Handle4021-1504
Firescreen Ring118 57 B28
Firescreen Rod1175 5 A4
7Grate AssemblyGR111
Hairpin Clip1010254
8Hearth Refractory16673A1
Installation Manual16696C1
Nailing Flange311902
12Outside Air KitAK171
Paint, Exterior Touch-up714791
Refractory Bracket23959A4
10Refractor y, Corner16948A4
9Refractory, Side166722
Smokeshelf16676B1
Smokeshield16829F2
1Standoff, Top134334
2Starter Section22072B1
Strip Protector19972B4
Beginning Manufacturing Date: N/A
Ending Manufacturing Date: Active
42
Heatilator • ST42A • 35038 Rev G • 02/05
Page 43
E. Limited Warranty
HEATILATOR WOODBURNING FIREPLACE
Limited Warranty
As part of its
20-YEAR BUYER PROTECTION PROGRAM
AS PART OF ITS 20 YEAR BUYER PROTECTION PROGRAM (“PROGRAM”), HEARTH & HOME TECHNOLOGIES
INC. (“HHT”) is pleased to offer a Limited Warranty and a Replacement Parts Advantage covering specifi c components of your Heatilator®
woodburning fi replace system ( the “Fireplace”), installed in the United States of America or Canada. Dealers and employees of HHT have no
authority to make any warranty or authorize any remedies in addition to or inconsistent with the terms of this Program.
Limited Warranty
HHT warrants the following components of your Heatilator woodburning fi replace to be free from original defects in material and workmanship
during the applicable periods described: fi ve years for the fi rebox assembly, chimney system and roof termination; two years for refractory fi rebox
liners; and one year for the grate, wire mesh screens, fan system, outside air system, and glass doors. All limited warranty periods run from the
date of initial installation of your Fireplace (the “Installation Date”). The Limited Warranty is subject to the conditions, exclusions and limitations of
liability listed below.
Replacement Parts Advantage
Under HHT’s Replacement Parts Advantage, for a period of twenty years from your Installation Date of your Fireplace, if available, HHT will provide
you with repair or replacement parts for defective components which are no longer under their applicable Limited Warranty, at 50% of the then
current retail list price for such components. HHT shall have no responsibility for freight and labor charges related to such parts.
Conditions, Exclusions, & Limitations of Liability
A. Both the Limited Warranty and Replacement Parts Advantage supplied by HHT apply only while the Fireplace is in its location of original
installation. HHT’s obligation under this warranty does not extend to damages resulting from (1) installation, operation or maintenance of
the Fireplace not in accordance with the Installation Instructions, Operating Instructions, and the Listing Agent Identifi cation Label furnished
with the Appliance; (2) installation which does not comply with local building codes; (3) shipping, improper handling, improper operation,
abuse, misuse, accident or unworkmanlike repairs; (4) environmental conditions, inadequate ventilation or drafting caused by tight sealing
construction of the structure, air handling devices such as exhaust fans or forced air furnaces, or other causes; (5) use of fuels other than
those specifi ed in the Operating Instructions; (6) installation or use of components not supplied with the Fireplace or any other components
not expressly authorized and approved by HHT; and/or (7) modifi cation of the Fireplace not expressly authorized and approved by HHT in
writing. This warranty is limited to only the component parts manufactured or supplied by HHT.
B. During the fi rst year of the Limited Warranty, HHT will, at its sole option, repair or replace any covered defective component and will provide
replacement parts at no charge. And will pay reasonable labor and freight costs. During the second through the fi fth years of the Limited
Warranty (if applicable), HHT will provide replacement parts free of charge for any covered defective component, but will not pay for freight
or labor costs related to the shipment of the parts or the actual repair or replacement. After the fi fth anniversary of the Installation date,
HHT’s sole obligation and your exclusive remedy is set forth in HHT’s Replacement Parts Advantage described above. In no event shall
HHT be liable for any incidental or consequential damages caused by defects in your Fireplace.
C. EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE WARRANTY
SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE WARRANTY SPECIFIED
ABOVE.
D. Some states do not allow exclusions or limitations of incidental or consequential damages, so those limitations may not apply to you. This
warranty gives you specifi c rights; you may also have other rights which vary from state to state.
How to Obtain Service
1. To obtain service under this warranty you must:
2. Send written notice of the claimed condition to Heatilator Technical Service Department, Hearth & Home Technologies, 1915 W. Saunders
Street, Mt.. Pleasant, Iowa 52641-1563. You may also register your claim online at www.heatilator.com.
3. Provide proof of purchase, model number, serial number, and manufacturing date code to HHT.
4. Provide HHT reasonable opportunity to investigate the claim, including reasonable opportunity to inspect the Appliance prior to any repair or
replacement work and before the Appliance or any component of the Appliance has been removed from the place of original installation.
5. Obtain HHT’s consent to any warranty work before the work is done.
ADDITIONAL INFORMATION: If you would like information on current HEATILATOR products or want to locate a dealer in your area, call