HearthStone Tucson (8700) Troubleshooting guide

Owner’s Manual & Installation Guide
for the Tucson (8720) GAS-FIRED
B-VENT HEATER
READ THIS OWNER’S
MANUAL
Operate and maintain this gas heater
according to this instruction manual.
Read This Manual In Its Entirety.
WARNING: If the information in these
instructions is not followed exactly, a fire or
explosion may result causing property damage,
personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch electrical switches; do not use
the phone in your building.
•Immediately call your gas supplier from a
neighbors phone. Follow your gas suppliers
instructions.
•If you cannot reach your gas supplier, call the
fire department.
A qualified installer, service agency or gas supplier
must perform installation and service.
AVERTISSEMENT: Assurez-vous de bien
suivre les instructions donné dans cette notice
pour réduire au minimum le risque d’incendie
ou pour éviter tout dommage matéeriel, toute
blessure ou la mort.
Ne pas entresposer ni utiliser d’essence ni d’autre
vaperurs ou liquides inflammables dans le
voisinage
de cet apprareil ou de tout autre appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
•Ne pas tenter d’allumer d’appareil.
•Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le
batiment où vous vous trouvez.
•Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le service dos incendies.
L’installation et service doit être exécuté par un
qualifié installer, agence de service ou le
fournisseur de gaz.
Model #8720
6400-40433
11-24-04

HearthStone Quality Home Heating Products Inc Tucson Model #8700
2
INFORMATION SHEET
Record, on this page, all relevant information concerning the purchase, installation, and maintenance
of your TUCSON Gas-Fired B-Vent heater. This information will facilitate servicing, purchase of
replacement parts, and warranty claims (if necessary). Keep your original receipt in a safe place as
proof of purchase.
Serial Number:
Fuel type (check one) Natural Gas Liquid Propane
Sold by:
Phone: Date of Purchase:
Installed by:
Phone: Date of Installation:
Gas Supplier:
Phone:
Read this Owner’s Manual before installing or operating the TUCSON heater. Retain this manual for future
reference.
SERVICE RECORD
Date Who Performed Work Work Performed Notes:
WHAT WHEN WHAT WHEN
Firebox Cleaning............. annually Door Gasket.................... Replacement as needed
Glass Cleaning................ as needed

HearthStone Quality Home Heating Products Inc Tucson Model #8700
3
INTRODUCTION
Congratulations on your purchase of a
Tucson Gas-Fired B-Vent heater. The
Tucson, by HearthStone, incorporates the
latest in gas technology, which will provide
you with clean, efficient heat for years to
come. The combination of natural stones
and cast iron gives the Tucson a pleasing
look that can be maintained with minimum
care.
The Tucson will provide you with years of
practical and convenient service. However,
as with any gas appliance, the unit must be
properly and safely installed and maintained
by qualified service personnel to ensure safe
and trouble-free operation.
Your Tucson is equipped with a standard
pilot which:
1. generates a milli-volt signal that
powers the wall-mounted thermostat
and;
2. lights the main burner when the
thermostat calls for heat.
This unit is equipped with an On/Off/T’stat
switch and a variable output control. The
variable output control is located on the gas
control valve. It allows you to vary the heat
output, along with the flame height to suit
personal taste. Heat output can be reduced
{set to “LOW”} during the Fall and Spring,
when the need for heat is reduced and
increased {set to “HIGH” during Winter
months, when the need for heat is the
greatest.
A wall-mounted thermostat is provided by
HearthStone. Regardless of how you set the
variable output control, when the optional
thermostat has been installed and the
On/Off/T’stat switch is set to “T’stat”, the
wall-mounted thermostat will control the
on/off cycling of the unit. At any time, you
can override the thermostat with the
On/Off/T’stat switch by setting it to “ON”
or “OFF”.
The Unit can also be equipped with an
optional blower fan, which turns on and off
independently of the burner flames. When
the switch, which allows you to turn the fan
on or off and control the speed of the fan to
suit your needs, is set to “High” or “Lo”, the
fan will automatically turn on when the
stove is hot and cycle off when the unit is no
longer hot.
Also available are two different optional
remote controls. Both of the remote controls
are capable of turning the unit on and off.
One of the optional remotes also allows you
to control the temperature of the stove from
anywhere in the vicinity of the unit. If “ON”
& “OFF” are the only controls required, Kit
# 90-56912 can be used. If you would like to
control the temperature via the remote
control, use Kit # 90-56914.
READ THIS OWNER’S MANUAL
Operate and maintain this gas heater
according to the instructions in this manual.
Read this manual in its entirety. This
manual has two sections, the first section is
for the OPERATOR, and the second section is
for the QUALIFIED SERVICE PERSONNEL only.
HEATER MUST BE INSTALLED
AND MAINTAINED BY QUALIFIED
SERVICE PERSONNEL
Verify the gas connections and venting
systems with requirements of local, regional
or national installation codes. Qualified
service personnel must inspect the gas heater
before use and at least annually.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
4
TABLE OF CONTENTS
READ THIS OWNER’S MANUAL........1
INTRODUCTION...........................................3
SAFETY INFORMATION...............................4
SPECIFICATIONS:.................................8
OWNER’S INFORMATION............................9
ROUTINE MAINTENANCE AND CARE.........9
INSTALLER’S INFORMATION ....................12
UNPACK AND INSPECT FOR DAMAGE ..... 13
ELECTRICAL CONNECTIONS ....................18
GAS SUPPLY & CONNECTIONS.................20
LOG PLACEMENT .....................................21
INITIAL ADJUSTMENTS.............................24
PARTS LISTS .............................................28
SAFETY INFORMATION
Your Tucson is a very attractive and
extremely efficient, utilizing today’s best
technologies. By following a few simple
safety precautions and by performing minimal
maintenance, the unit will remain appealing
while providing years of quality performance.
The installation must conform to local codes
or, in the absences of local codes, the current
National Fuel Gas Code, ANSI Z223.1 (NFPA
54) or CAN/CGA B149 Installation Code.
(Installer l’appareil selon les codes ou
réglements locaux, ou, en l’absence de tells
réglements, selon les Codes d’installation
CAN/CGA B149.)
During the first few hours of operation the
appliance may produce a slight smoke and/or
odor. This is normal during the first several
burns. During the initial burn, open a
window(s) to assist in the removal of the
smoke/odor. If the logs appear to smoke, turn
the heater off and call a qualified service
technician.
The appliance and its individual shutoff valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at test pressures in excess of ½
psig. (3.5k Pa). The appliance must be isolated
from the gas supply piping system by closing
its individual manual shutoff valve during any
pressure testing of the gas supply piping
system at test pressures equal to or less than ½
psig (3.5k Pa).
FIRE HAZARD
Do not store or use gasoline or other
flammable vapors or liquids in the vicinity
of this appliance. The Tucson should be
located out of traffic and away from
furniture, draperies, clothing, and flammable
material.
SHOCK HAZARD
(When equipped with an optional blower)
This appliance is equipped with a three-prong
(grounding) plug for protection against shock
hazard and should be plugged directly into a
properly grounded three-prong receptacle. Do
not cut or remove the grounding prong from the
plug.
MUST BE VENTED TO THE
OUTSIDE
Never vent the gas heater to other rooms or
buildings. This gas appliance must not be
connected to a chimney flue serving a
separate solid-fuel burning appliance.
SERVICE CAUTION
If you believe your Tucson is not, in any
way, performing properly, immediately
discontinue operation until the unit has been
inspected and approved by qualified service
personnel. Prior to servicing the unit, turn

HearthStone Quality Home Heating Products Inc Tucson Model #8700
5
the valve control knob clockwise to “OFF”.
The unit should be cool prior to servicing
and cleaning. Any safety screen, guard, or
component removed during servicing should
be replaced prior to operation. Use of any
components not supplied by HearthStone on
the stove voids all warranties. Do not
substitute components.
HOT SURFACES
Certain exposed surfaces of the Tucson will
reach high temperatures during normal
operation. Clearances to combustibles must
be maintained, as specified in the “Clearances
To Combustibles” section of this manual. Due
to high temperatures the appliance should
be located out of traffic and away from
furniture, draperies, clothing and
flammable materials. Children and adults
should be alerted to the hazards of high
surface temperatures and should stay away
to avoid burns to skin or clothing ignition.
Young children should be carefully
supervised when in the same room as the
appliance. Clothing or other flammable
material should not be placed on or near
the appliance. (Surveille les enfants. Garder
les vêtements, les meubles, l’essence ou autres
liquides à vapeur inflammables lin de
l’appareil.) Clean the area around, under, and
behind the unit on a regular basis to prevent
the accumulation of dust and lint.
NEVER BURN PAPER, WOOD OR
OTHER MATERIALS
This gas heater is designed to burn natural
gas or liquid propane (LP). Never burn any
fuel not intended for use with this unit.
WARNING
This gas appliance must not be connected to
a chimney flue serving a separate solid-fuel
burning appliance
›WARNING: DO NOT OPERATE THE APPLIANCE WITH THE FRONT GLASS
REMOVED,CRACKEDORBROKEN. REPLACEMENTOF GLASS SHOULDBE DONE BY
A LICENSED OR QUALIFIED SERVICE PERSON. ONLY OPEN FRONT FOR ROUTINE
SERVICE. DO NOT SLAM OR STRIKE GLASS.
CERAMIC FIBER LOG SAFETY
INFORMATION
If the decorative ceramic log material
supplied with the Tucson is damaged or
missing, it must be replaced with the same,
approved replacement parts supplied by the
manufacturer. These components affect the
combustion quality and safety of the heater.
Do not replace fiber ceramic logs with
unapproved ceramic logs or any other
material.
Always wear gloves and safety goggles
while handling the log set and ember
strip.
!ELECTRICAL HAZARD!
When the optional blower kit is installed, the
Tucson must be electrically grounded in
accordance with local codes, or in the
absence of local codes, with the National
Electrical Code, ANSI.NFPA 70 in the U.S.
or CSA C22.1 Canadian Electrical Code in
Canada. The Tucson fan accessory is
equipped with two blower fans. The three-
prong grounded plug must be plugged
directly into a properly grounded three-
prong receptacle. Do not cut or remove the

HearthStone Quality Home Heating Products Inc Tucson Model #8700
6
grounding prong from the plug or otherwise
attempt to circumvent the grounding
protection provided with the unit.
DO NOT LIGHT PILOT OR MAIN
BURNERS BY HAND
The standing pilot light equipped on this gas
heater is lit by using a piezoelectric spark
generator as described elsewhere in this
manual. Never attempt to light the pilot or
main burners by hand with a match or
lighter. If, after repeated attempts, the pilot
light fails to light, discontinue operation,
turn off the gas at the gas control valve, and
immediately contact qualified service
personnel for assistance.
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts
02202

HearthStone Quality Home Heating Products Inc Tucson Model #8700
7
MOBILE HOME INSTALLATIONS
This appliance may be installed in an
aftermarket, permanently located,
manufactured (mobile) home, where not
prohibited by local codes.
This appliance is only for use with the
type(s) of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases, unless a certified kit is
used.
(Cet appareil peut être installé dans un
maison préfabriquée (mobile) déjá installée
á demeure si les réglements locaux le
permettent.
Cet appareil doit être atilisé uniquement
avec les types de gas indiqués sur la plaque
signalétique. Ne pas l’utiliser avec d’autres
gas sauf si un kited conversion certifié est
installé. )
SERVICE CAUTION
Any shield, door, or safety screen
component removed for servicing will be
replaced prior to operating. If you believe
your Tucson is not performing properly in
any way what so ever, immediately
discontinue operation until the unit has been
inspected by qualified service personnel.
Always shut off the gas and electricity to the
stove while servicing. Make sure the unit is
not hot when servicing or cleaning. Use of
any components not supplied by
HearthStone on the stove or vent system
voids all warranties. Do not substitute
components.
HearthStone
Quality Home Heating Products
317 Stafford Avenue,
Morrisville, Vermont 05661
E-Mail: [email protected]

HearthStone Quality Home Heating Products Inc Tucson Model #8700
8
SPECIFICATIONS:
LISTED: B-VENT GAS HEATER
Listed: Gas-Fired B-Vent Fireplace Heater
Model: Tucson B-Vent Gas Fireplace Heater
Testing Agency: Intertek Testing Services NA Inc. (ITS)
Tested to: ANSI Z21.88-2002, CSA 2.33-M02, CAN/CGA2.17-M91
Certified for Canada
Approved for
Mobile Home Installation (see page 7)
Figure 1: Tucson Dimensions
NG LP
Input rating (Btu/hr) 0-1370 m 26,000 26,000
Maximum output (Btu/hr) 0-1370 m 20,000 20,500
Minimum input rating (Btu/hr) 14,700 14,700
Orifice size DMS 0-1370 m 40 53
Man. pressure-HI setting (in.w.c./kPa) 3.5/0.9 10.0/2.5
Man. pressure-LO setting (in.w.c./kPa) 1.2/0.3 3.3/0.8
Inlet pressure-Lo (in.w.c./kPa) 5.0/1.25 11.0/2.75

HearthStone Quality Home Heating Products Inc Tucson Model #8700
9
OWNER’S INFORMATION
DAILY OPERATION
The Tucson gas-fired heater is easily
operated by the homeowner once installed
and adjusted by qualified service personnel.
The unit is controlled via the wall-mounted
thermostat during the heating season. Set the
thermostat to the desired room temperature
and the unit will cycle on and off as
required. By adjusting the variable output
control located on the gas control valve, the
rate of heat output can be varied to meet the
heating requirements of the season.
Choosing a low flame setting will result in
longer burn cycles at a reduced output, while
choosing a high flame setting will result in a
shorter, hotter burn cycle. Through trial and
error, the homeowner can select the
optimum flame size for their setting and
application.
During the summer non-heating season,
switch the wall thermostat to “OFF”, and
turn off the pilot. This will improve the
overall efficiency of the unit as the heat
from the pilot is wasted. When putting the
unit back into service, follow the lighting
instructions described on page 24.
When the unit is first lit, especially when
cool, it is normal to experience some
condensation on the inside of the window
glass. This condensation will burn off within
the first few minutes of operation. If
continuous condensation on the window
glass or dripping water from any part of the
unit or venting system (chimney) is noted,
immediately discontinue operation of the
unit and contact qualified service personnel.
ROUTINE MAINTENANCE
AND CARE
The Tucson requires minimal routine
maintenance and care. The unit should
always be cool and off when being cleaned.
CLEANING
›WARNING: Do not clean the unit
when hot. The unit should receive
regular cleaning on, under, and around
the stove to prevent the buildup of dust
and lint. The exterior surfaces of the unit
can be cleaned using soap, water, and a
soft cloth. Do not use abrasive or
chemical cleaners and take care not to
scratch the glass or enamel finish (if so
equipped) when cleaning the unit. The
use of chemical wax based cleaners or
polishes are not recommended due to the
potential for discoloration or the enamel
when the residue of the cleaners or
polishes is exposed to heat.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
10
FIREBOX, PILOT, & BURNER
TUBES
The firebox should receive periodic cleaning
to prevent the accumulation of dust, lint, and
other debris. To clean the firebox, set the
thermostat to the “OFF” position, and turn
off the gas at the gas control valve. When
the unit is cool, unfasten the front door and
carefully remove the decorative ceramic
fiber log set, taking care not to damage the
logs or chip the enamel cast iron. Clean the
firebox burner tube and carefully vacuum
the entire surface of the log set. Thoroughly
vacuum the ports (holes) along the top of the
burner tubes.
With the decorative ceramic fiber logs out of
the firebox, fasten the door shut and
momentarily light the unit according to the
lighting instructions described on page 24.
Check to insure a flame is burning from
each burner port. The pilot flame should be
large enough to engulf the
sensor/thermocouple. Turn the unit off by
setting the thermostat to “OFF” and turning
off the gas control valve. Allow the unit to
cool. Check and clean any burner ports that
are not burning or not burning properly.
Clean burner ports using soft a soft brush or
vacuum cleaner. If the pilot flame height
needs adjustment, it should be adjusted by
qualified service personnel as described on
page 26.
IGNITER
THERMOCOUPLE PILOT
PILOT
FLAME
THERMOPILE
PILOT CLIP
Figure 2: Pilot Assembly
Complete the cleaning procedure by
carefully placing the log set within the
firebox as described on page 21. Close and
fasten the front door. Turn on the gas, light
the unit and check for proper operation.
Flame patterns should look like Figure 3.
Regularly check to insure the area around
the Tucson is kept free from combustible
materials, gasoline, and other flammable
vapors and liquids. Check that the flow of
combustion and ventilation air is not
obstructed. Once a year the unit and venting
system should be inspected by qualified
service personnel to insure that they are
clean, free of obstruction, safe, and in good
working order. If service or maintenance is
required, it should be performed by qualified
service personnel.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
11
Figure 3: Burner Flame Pattern
REPLACE THE FRONT DOOR
GASKET AS NEEDED
Your Tucson uses a 3/8” rope-type
fiberglass gasket to make a tight seal
between the door frame and the firebox. In
time, the gasket can become brittle and
compressed and should be replaced. New
gasket material is available from your
Authorized HearthStone Dealer.
1. Allow the Tucson to cool completely.
Remove the existing gasket by grasping
one end and pulling firmly.
2. Use a wire brush or the tip of a
screwdriver to clean the channel of
remaining gasket.
3. Determine the correct length of the
appropriate-sized gasket by laying it out
in the channel. Allow an extra 1 to 2”
(25-50mm), and mark the spot to be cut.
4. Cut the gasket at the marked spot with a
utility knife. Twist the ends slightly to
prevent the gasket from unraveling.
5. Apply water glass adhesive to the gasket
channel.
6. Starting at one end, press the gasket into
the channel. Insure a good joint where
the gasket ends meet before trimming
any excess. Do not overlap the gasket
ends or leave ends with ragged edges.
7. Firmly and evenly press the gasket to
seat it in its channel.
CLASS CLEANING
If operating with propane, it may be
necessary to clean the inside of the glass
occasionally. Do not use abrasive cleaners.
Do not clean the glass when hot. Allow
glass to cool and apply a window cleaning
fluid.
›WARNING: Do not operate this
appliance with the glass panel removed,
cracked, or broken. Do not subject the
door to abuse, such as striking or
slamming shut. Replacement of the glass
panel should be done by a licensed or
qualified service person.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
12
INSTALLER’S
INFORMATION
CODES
Adhere to all local codes or, in their
absence, the latest edition of THE
NATIONAL FUEL GAS CODE ANSI
Z223.1 (NFPA 54) or CAN/CGA B149
Installation Code that can be obtained from:
AMERICAN NATIONAL STANDARDS
INSTITUTE, INC.
1430 BROADWAY
NEW YORK, NY 10018
OR
NATIONAL FIRE PROTECTION
ASSOCIATION, INC.
BATTERY MARCH PARK
QUINCY, MA 02269
The appliance when installed, must be
electrically connected and grounded in
accordance with local codes or, in the
absence of local codes, with the current
NFPA 70-National Electrical Code or CSA
C22.1-Canadian Electric Code.
A manufactured home (mobile) OEM
installation must conform with the
Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280
(U.S.) or Standard for Manufactured Home
Installation, ANSI/NCBCS A225.1 or
Standard for Gas Equipped Recreational
Vehicles and mobile Housing, CSA
Z240.4.CAN/SCA Z240 MH (Canada).
(Installer l’appareil selon les codes ou
règlements locaux, ou, en l’absence de tels
règlements, selon les Codes d’installation
CAN/CGA-B149.)
ITEMS REQUIRED FOR
INSTALLATION
* External regulator (for propane/L.P.G.
only)
* Piping which complies with local codes
* Pipe sealant approved for use with
propane/L.P.G. (resistant to sulfur
compounds)
* Manual shutoff valve
* Sediment trap
* Tee joint
* Pipe wrench
* Phillips head screwdriver
* Other parts as required by local code
*Safety Glasses
*Gloves
PACKING LIST
1-Tucson Gas-Fired Heater
2-Decorative Ceramic Fiber Logs
2-Ember Screens
1-Charcoal Embers
1-Owner’s Manual
1-Thermostat
1-40’ Thermostat wire
1-L.P. Fuel Conversion Kit
1-Warranty Validation Form
1-Stone Set (installation instructions
included in kit)
Note: Vent kits are supplied separately.
Failure to use the venting components
suggested by HearthStone will void your
warranty.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
13
UNPACKING AND INSPECTION
UNPACK AND INSPECT FOR DAMAGE
The Tucson is packaged by the manufacturer
to withstand shipment without damage.
However, damage can occur during transit
so take care to inspect for damage when
unpacking and installing the unit. If any
damage or missing parts are detected,
immediately contact your dealer.Do not
install or put into service a damaged or
incomplete heater.
The stone set will be packaged separately
Carefully remove and set aside the stones.
Use the protective wrapping material to
temporarily protect the stones from chipping
and damage while the unit is inspected and
installed.
Inspect the Tucson for visible or concealed
damage. The unit should appear to be square
and true. The stones should be whole and
without cracks, chips, or breakage. The
sheet metal parts should be smooth and free
of bends and dents. The enameled cast iron
should be free of chips or cracks. If visible
or concealed damage is found or suspected,
contact your dealer for instructions.
With the top grill removed and set aside,
undo the lag bolts that fasten the unit to the
pallet. Take care not to mar or chip the
enameled legs. Lift the stove off the pallet
and set it into place.
The decorative ceramic fiber logs supplied
with the Tucson are contained within the
firebox. Always use great care when
handling the decorative ceramic fire logs as
they are fragile and subject to damage and
breakage if handled roughly. Open the
firebox door using a 5/32”allen wrench
screwdriver and inspect the logs for damage.
If a broken log is encountered, contact your
dealer for replacement logs. Otherwise, set
the logs aside until called for during the
installation.
To install the stones, use the instructions that are
supplied with the stone set.
HEARTH REQUIREMENT/FLOOR
PROTECTION
The Tucson may be placed on a non-
combustible surface or wood floor. For
placement of the Tucson on carpeting, vinyl
tile or other combustible materials, the
appliance shall be installed on a metal or
wood panel extending the full width and
depth of the appliance. Installations must
meet local codes.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
14
CLEARANCE TO COMBUSTIBLES
Due to high surface temperatures, the unit
should be located out of traffic and away
from furniture and draperies. Clothing and
other flammable material should not be
placed on or near the heater. When
positioning the unit always maintain
adequate clearances around air openings into
the combustion chamber and allow for
adequate ventilation. Minimum clearances
to combustibles must be maintained as
shown in the illustrations in figures 4-7.
Note: The rear clearance to combustibles
will be determined by either the unit’s or the
vent pipe’s minimum clearance, (A refer to
Figures 6+7) depending on whether the
installation calls for vertical rise within the
room or a rear exit, through-the-wall vent
pipe.
Be sure to consider the need for access to
the gas control valve access door on the
front of the unit as well as full access for
periodic cleaning and servicing. Also
consider the location of the Optional Blower
Fan.
NOTE: These clearances represent minimum
distances in all cases, which, through testing in an
independent laboratory to ANSI and CSA
standards, will prevent fire or spontaneous
combustion. We do not control the combustible
materials exposed to heat by this product;
therefore, an assessment must be made by the
installer to prevent consequential damage of walls
and flooring.
2.00
2.00
14-1/2"
10-1/4"
Figure 4: Corner Clearances to Combustibles
12-1/2"
6"
2.00
2.00
Figure 5: Minimum Wall Clearance To
Combustibles

HearthStone Quality Home Heating Products Inc Tucson Model #8700
15
Figure 6: Mantle Clearance To Combustibles
Figure 7: Wall Clearance To Combustibles
Venting
Normally Aspirating Chimneys
The Tucson is a highly efficient gas heater.
With operating efficiency as high as 82%,
most heat output is retained within the living
space, with minimal heat leaving the room
via the chimney. However, some heat is
required in all chimneys in order to establish
and maintain a draft. Since most of the heat
is retained in the living space with minimal
heat entering the chimney, it is imperative
that the chimney/venting system be properly
sized and installed in order to establish and
maintain the draft required for the unit to
function.
The Tucson must be properly connected to a
4" (102 mm) diameter type B-1 vent which
is constructed and installed in accordance
with NFPA54 and NFPA211. Single wall
vent pipe may be used within the same room
as the Tucson so long as adequate (6" or 152
mm) clearance is maintained from the single
wall pipe to combustible surfaces. The
single wall vent pipe must connect to
double-wall type B-1 vent from thereon.
The minimum clearance from type B-1 vent
to combustibles is 1"(25 mm).
Connect the single wall or B-1 vent pipe to
the flue collar located on the rear surface of
the unit using 3 sheet metal screws. For
wall, roof or partition penetration, refer to
the current edition of ANSI Z223.1 or
CAN1-B149 for instructions and clearances
to combustibles. The Tucson can be
connected to an existing, properly
constructed masonry or prefabricated
chimney so long as the type B-1 vent is
extended through the entire length of the
chimney. An annual inspection is required to

HearthStone Quality Home Heating Products Inc Tucson Model #8700
16
confirm that the vent is unobstructed. The
vent can not be connected with a flue
serving a solid fuel appliance. It however,
can be installed to a flue serving another gas
or oil appliance, so long as it is in
accordance with the National Fuel Gas
Code.
Type B-1 vent pipe is intended primarily for
installation inside buildings to provide an
essentially vertical passageway for flue
gases from the vented gas appliance to the
outside air. When it is impractical to install
B-1 vent pipe inside a building, it may be
installed outdoors provided that it is: 1)
certified for outside installation, 2) installed
in accordance with manufacturer’s
installation instructions and 3) adequately
chased (enclosed) and insulated (per
Venting Tables, Category I-Central
Furnaces, AGA and GAMA current edition;
Standards for Gas Vents, National Standards
of Canada and CAN/CGA-B149.1-M91).
Exterior B-1 vent pipe passing through an
unused masonry chimney flue is not
considered to be exposed to the outdoors.
Four-inch flexible pipe can be used in place
of B-1 vent pipe wherever it is impractical
or impossible to install rigid Type B-1 vent
pipe. However, flexible pipe is less
desirable than B-1 vent pipe, because there
is a greater heat loss along the length of flex
pipe, which may produce an unacceptable
draft
Draft Hood/Down Draft Sensor/Spill
Switch
The Tucson has a draft hood as part of its
rear assembly. The draft hood must not be
altered or obstructed. The Tucson must be
installed so that the draft hood is in the same
atmospheric pressure zone as the
combustible air inlet for the unit. The
Tucson cannot and must not be connected to
an outside air source; the unit must take its
combustion air from the living space in
which it is installed. The draft hood is
equipped with a safety shutoff down draft
sensor switch (spill switch), which is located
in the draft hood just beneath the flue collar
on the rear of the unit. This switch is
designed to sense a loss of draft within the
chimney. The down draft sensor switch is
wired in series with the pilot thermocouple
and is typically in the closed position.
Should the Tucson fail to establish or lose
draft while in operation, hot exhaust gasses
will spill into the room through the bottom
of the draft hood instead of exiting the draft
hood via the flue collar and venting to the
outdoors. When this undesirable down draft
condition occurs the hot gasses spilling out
of the draft hood will heat the spill switch
causing it to open, which turns the unit off.
Do not modify, disconnect or otherwise
defeat the purpose of the down draft sensor
switch. If your stove shuts off during
normal operation, it is indicative of an
unsafe venting condition, which must be
corrected. Operation of this unit when not
properly connected to a properly installed
and maintained venting system or tampering
with the vent safety shutoff system can
result in carbon monoxide (CO) poisoning
and possible death.
Power Venting
For applications where it is impractical or
impossible to exit B-1 vent pipe to above the
existing roof line, the Tucson can be vented
using a power vent. A power vent is
essentially a specialized electric fan
mounted on the outer wall of the building,
which is connected to the heater via the flue
pipe. When the thermostat calls for heat, the
power vent turns on and creates a draft in
the flue pipe similar to the draft created by a
properly functioning conventional chimney.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
17
The Tucson operates in a normal fashion,
satisfied by the simulated draft. A series of
interlocking safety devices prevents
operation of the heater unless the power vent
is operating properly. Both the Tucson and
the power vent are controlled by the wall
thermostat and neither will operate if there is
a power failure. For installations requiring
power venting, use only an AGA (U.S.) Or
CGA (CANADA) listed unit. The power
vent supplier will in turn supply the power
vent installations.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
18
ELECTRICAL CONNECTIONS
NOTE: OPEN VALVE DOOR UNDER THE ASH LIP FOR ELECTRICAL AND GAS
CONNECTIONS.
THERMOSTAT
The ON/OFF/T’stat switch or wall mounted
thermostat controls the Tucson. We
recommend installation of the thermostat for
more comfortable performance, however
you may still override the thermostat by
setting the switch to “ON”. The thermostat
controls the unit by “calling for heat.” The
thermostat turns the unit on when the room
is cold, and turns the unit off once the room
is warmed sufficiently. The thermostat is
controlled by a 750 millivolt DC two-wire
circuit.
REMOTE CONTROL
There are two different optional remote
controls. Both of the remote controls are
capable of turning the unit on and off. One
of the optional remotes also allows you to
control the temperature of the stove, (in the
same way the thermostat controls the
heater), from anywhere in the vicinity of the
unit. If “ON” & “OFF” are the only controls
required, Kit #90-56912 can be used. If you
would like to control the temperature via the
remote control, use Kit #90-56914.
Installation instructions are provided with
the kits.
THERMOSTAT PLACEMENT
The thermostat should be placed in the same
room or living space as the unit. Typically
5’ (1.5m) off the floor and away from any
influences that may cause the temperature in
the vicinity of the thermostat to be
unrepresentative of the room temperature in
general. Such influences might include
strong lighting, a heater vent from the
central heating system, or a nearby drafty
window.
Placement of the thermostat on an inside
wall rather than an outside wall is
preferable. Do not place the thermostat
directly behind or too close to the unit,
otherwise heat from the unit will
immediately satisfy the thermostat and turn
the unit off.
THERMOSTAT WIRING
When installing the thermostat, do not cut and
splice the thermostat wire. This will create a
voltage drop that will case your unit to run
improperly
The thermostat should be connected to the
Tucson using no more than 40’ (12 m) of the
provided insulated thermostat wire. Be sure
to leave a small coil of thermostat wire
behind the Tucson so that the unit can be
moved out of position for servicing and
cleaning.
Connect one of the thermostat wires to the
gas control marked TH and the other to the
yellow wire coming from the on/off T’stat
switch. When making these connections,
position the thermostat wire so that it
extends towards the wall behind the Tucson,
then towards the thermostat.
At the thermostat, the wires should be
connected to the two connection screws on
the back of the thermostat per the
instructions received with the thermostat.
Take care not to over-tighten the connection
screws and not to damage the internal parts
of the thermostat.

HearthStone Quality Home Heating Products Inc Tucson Model #8700
19
WIRING INSTRUCTIONS
›CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation. Verify proper operation after servicing.
(Attention: Au moment de l’entretien des commandes, étiquetez tous les fils avant le
débranchement. Des erreurs de câblage peuvent entraîun fonctionnement inadequate et
dangereux.) The proper location of wire connections is shown in Figure 8.
BkBk
Y
V
Bk
W
BkBk
Bk
W
G
G G
W
Wiring Diagram - Tucson
Wiring Color KEY:
Hearthstone
10 20 30
50 70 90
c
OFF
O
W
YG
Bk V
Y
10 20 30 c
50 60 70 80 90
OG
R
Bk
Br
Bk
WBk
B
W
Figure 8: Wiring Diagram

HearthStone Quality Home Heating Products Inc Tucson Model #8700
20
NOTE: If an optional blower is to be installed now or in the future, make sure the gas line is
installed as close to the floor as possible.
Figure 9: Gas Control Valve
GAS SUPPLY &
CONNECTIONS
›NOTICE: A qualified technician must
connect the heater to the gas supply
and leak test the unit before it is
approved for use. Consult all codes.
›WARNING: The unit must be installed
and connected in accordance with local
codes, or in the absence of local codes,
with the most current edition of the
National Fuel Gas Code ANSI Z223.1
(NFPA 54) or CAN/CGA B149
Installation Code.
GAS CONNECTIONS
The gas supply line connection is made to
the Tucson’s gas control valve just inside
the left front leg of the unit using a 3/8”
male NPT fitting. The supply line should be
½” diameter or appropriately sized to
provide a sufficient gas supply to meet the
maximum demand of the unit without undue
loss of pressure. We recommend a flexible
line to avoid undue mechanical load on the
valve and to ease thread alignment, but refer
to local codes.
›CAUTION: Check Gas Type!
GAS SUPPLY
This appliance and its individual shutoff
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of ½ psig. The Tucson must be
isolated from the gas supply piping system
by closing its individual manual shutoff
valve during any pressure testing of the gas
supply piping system at test pressures equal
to or greater than ½ psig.
GAS PRESSURE ADJUSTMENT
NOTE: A QUALIFIED TECHNICIAN
MUST PERFORM THIS PROCEDURE!