HearthStone Tucson 8702 ST User manual

Hearthstone Quality Home Heating Products, Inc. ®
Tucson DX/ST Model 8702
Manual: 6400-40461
R: 2 - 7/28/2011
Tucson DX & ST
(Model 8702)
GAS-FIRED DIRECT-VENT HEATER
Owner's Manual
Installation & Operating
Instructions
Read This Manual in Its Entirety
Operate And Maintain This Gas Heater
According To This Instruction Manual.
SAVE THESE INSTRUCTIONS!
WARNING: FOLLOW THE INFORMATION IN
THESE INSTRUCTIONS EXACTLY, IF NOT, A FIRE
OR EXPLOSION MAY RESULT CAUSING
PROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
WARNING: DO NOT STORE OR USE GASOLINE
OR ANY OTHER FLAMMABLE VAPORS AND
LIQUIDS NEAR THIS OR ANY OTHER GAS
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 phone
outside the structure. Follow your gas supplier’s
instructions.
If you cannot reach your gas supplier, call the fire
department or 911.
A qualified installer, service agency, or gas supplier must
perform installation and service of this appliance. In the
Commonwealth of Massachusetts, all installation of gas
lines and gas fittings must be performed by a licensed gas
fitter or licensed plumber.
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.
AVERTISSEMENT: 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.

Intentionally Blank

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
3
Information Sheet
Use this page to record all relevant information concerning the purchase, installation, and maintenance of your
Tucson Model 8702 Direct -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: Natural Gas Liquid Propane
Sold by: Date of Purchase:
Address:
Phone:
E-mail Website:
Installed by: Date of Installation:
Address:
Phone:
E-mail Website:
Gas Supplier:
Address:
Phone:
E-mail Website:
Read this Owner’s Manual before installing, or operating your TUCSON. Retain this manual for future
reference.
SERVICE RECORD
Date Who Performed Work Work Performed Notes:
WHAT WHEN
Firebox Cleaning............. annually
Glass Cleaning................ as needed
Door Gasket.................... Replacement as needed

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
4
Table of Contents
INTRODUCTION ...........................................................................................................................................................4
SAFETY INFORMATION ................................................................................................................................................6
PROFLAME CONTROL SYSTEM &FEATURES................................................................................................................8
Tucson 8702 ST Model Overview............................................................................................................................... 8
Tucson 8702 DX Model Overview.............................................................................................................................. 9
Control Functions ..................................................................................................................................................... 10
SPECIFICATIONS.......................................................................................................................................................12
INSTALLATION PREPARATION....................................................................................................................................13
Codes....................................................................................................................................................................... 13
Items Required for Installation.................................................................................................................................. 13
Packing List.............................................................................................................................................................. 13
Unpacking and Inspection ........................................................................................................................................ 13
CLEARANCES TO COMBUSTIBLES..............................................................................................................................16
Clearance to Combustibles....................................................................................................................................... 16
Hearth Requirement/Floor Protection....................................................................................................................... 16
VENTING INFORMATION.............................................................................................................................................18
Venting Components................................................................................................................................................ 18
Minimum Venting Installation Instructions ................................................................................................................ 21
ELECTRICAL SYSTEM INFORMATION ..........................................................................................................................24
GAS SUPPLY &CONNECTIONS..................................................................................................................................27
Gas Connections...................................................................................................................................................... 28
HEAT WAVE BAFFLE,LOG SET,&SCREEN PLACEMENT............................................................................................29
Installation of the Heat Wave Baffle.......................................................................................................................... 29
Installation of the Log Set......................................................................................................................................... 30
Installation of the Optional Screen............................................................................................................................ 31
Removal of Log Set.................................................................................................................................................. 31
Completing the Installation ....................................................................................................................................... 31
STONE INSTALLATION...............................................................................................................................................32
LIGHTING &OPERATION ...........................................................................................................................................34
Lighting Instructions.................................................................................................................................................. 34
Initial Adjustments .................................................................................................................................................... 34
Daily Operation......................................................................................................................................................... 36
ROUTINE MAINTENANCE AND CARE...........................................................................................................................38
Cleaning ................................................................................................................................................................... 38
Monthly:.................................................................................................................................................................... 38
Annually:................................................................................................................................................................... 38
As Needed:............................................................................................................................................................... 39
PARTS LIST..............................................................................................................................................................40
TROUBLESHOOTING..................................................................................................................................................41
RATING LABEL .........................................................................................................................................................43
Introduction

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
5
Congratulations on your purchase of the Tucson
Model 8702, Gas-Fired Direct-Vent heater. The
Tucson, by Hearthstone, incorporates the latest in
direct vent gas technology, which will provide you
with clean, efficient heat for years to come. The
combination of natural stones and enameled or
painted cast iron gives the Tucson a pleasing look
that is 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.
Tucson Model 8702 features:
1. Proflame Control System
2. 5-piece log set
3. Heat Wave Baffle for maximum radiant heat
output.
4. Platinum Bright Embers
5. The option to toggle back and forth between an
Intermittent (IPI) or Continuous (CPI) pilot mode.
a. The IPI mode allows the most efficient
use of gas, burning the pilot only when
the thermostat calls for the burner to
ignite.
b. The CPI mode runs the pilot
continuously keeping the firebox warmer
thus promoting better draft in colder
climates.
6. Battery backup for functionality during power
outages.
The ST (Standard) version features:
1. Manual Hi/Lo Flame control
2. Manual On/Off/Thermostat Mode switch
3. Remote Control - optional
4. Thermostat - optional
The DX (Deluxe) version features:
1. Proflame GTMF System
a. Thermostatic Remote Control
i. Six (6) flame levels, adjustable
via the remote
ii. Six (6) blower speeds,
adjustable via the remote
b. Thermostatic mode to turn on/off based
upon room temperature.
c. “Smart” thermostatic mode to modulate
flame levels automatically as the unit
approaches the set point temperature.
d. Additional outlet controlled by the
remote.
2. “Child-safe” lock-out on remote control.
3. “Low Battery” indicator for Transmitter on remote
control
4. Blower Assembly
Part # Description
ST Version
8702-0010ST Standard Matte Black w/o Stone
8702-0020ST Standard Brown Enamel w/o Stone
97-68000 ST to DX Conversion Kit (optional)
DX Version
8702-0010DX Deluxe Matte Black w/o Stone
8702-0020DX Deluxe Brown Enamel w/o Stone
Stone Sets:
9702-41 Soapstone Kit – Tucson 8702
9702-53 Autumn Brown Granite Kit – 8702
Read this Owner’s Manual
Operate and maintain this gas heater according to
the instructions in this manual. For your safety, and
years of trouble free operation, read this manual in
its entirety.
Heater Must Be Installed and Maintained By
Qualified Service Personnel
Verify the gas connections and venting systems
meet the requirements of local, regional or national
installation codes. Qualified service personnel must
inspect the gas heater before use, and at least
annually.
Manufactured & warranted by:
Hearthstone Quality Home heating Products, Inc.
317 Stafford Ave.
Morrisville, VT 05661
www.hearthstonestoves.com

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
6
Safety Information
Your Tucson is a very attractive and extremely
efficient heater, 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.)
CAUTION: DO NOT USE THIS APPLIANCE IF ANY
PART WAS UNDER WATER. IMMEDIATELY CALL
A QUALIFIED SERVICE TECHNICIAN TO INSPECT
THE HEATER AND TO REPLACE ANY PART OF
THE CONTROL SYSTEM AND GAS CONTROL
THAT HAS BEEN UNDER WATER. (NE PAS SE
SERVIR DE CET APPAREIL S’IL A ÉTÉ PLONGÉ
DANS L’EAU, COMPLÉTEMENT OU EN PARTIE.
APPELER UN TECHNICIEN QUALIFIÉ POUR
INSPECTOR L’APPAREIL ET REMPLACER TOUTE
PARTIE DU SYSTÉME DE CONTRÔLE ET TOUTE
COMMANDE QUI ONT ÉTÉ PLUNGES DANS
L’LAU.)
During the first few hours of operation the appliance
may produce smoke and/or odor. This is normal
during the first several burns and also after long
periods when the stove is not burned. During these
initial burns, open a window(s) to assist in the
removal of the smoke/odor.
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.
Locate the Tucson out of traffic areas and away from
furniture, draperies, clothing, and flammable
material.
Vent Only to the Outside
Never vent the gas heater to other rooms or
buildings.
Service Caution
If you believe your Tucson is not, in any way,
performing properly, immediately discontinue
operation until the unit is inspected and approved by
qualified service personnel. Prior to servicing the
unit, turn the gas to the valve off, and disconnect
any electrical source. Ensure the unit is cool prior to
servicing and cleaning. Replace any safety screen,
guard, or component removed during servicing 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.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Proper Fuel
This gas heater is designed to burn natural gas (NG)
or with conversion, liquid propane (LP). Never burn
any fuel gas not intended for use with this unit.
Never burn paper, wood, or other materials in this
appliance.
This heater is factory equipped to burn natural gas
(NG). To burn propane (LP), you must purchase an
LP conversion kit (97-56100 {ST}, 97-56104 {DX}).
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 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. )
WARNING: THIS GAS APPLIANCE MUST NOT BE
CONNECTED TO A CHIMNEY FLUE SERVING A
SEPARATE GAS OR SOLID-FUEL BURNING
APPLIANCE
WARNING: DO NOT OPERATE THE APPLIANCE
WITH THE FRONT GLASS REMOVED, CRACKED,
OR BROKEN. REPLACEMENT OF GLASS
SHOULD BE DONE BY A LICENSED OR
QUALIFIED SERVICE PERSON. ONLY OPEN
FRONT FOR ROUTINE SERVICE. DO NOT SLAM
FRONT OR STRIKE GLASS.
WARNING: HEARTHSTONE RECOMMENDS THAT
ONLY AN NFI CERTIFIED SERVICE TECHNICIAN
INSTALLS, AND REPAIRS THIS APPLIANCE. A
QUALIFIED SERVICE TECHNICIAN MUST
INSPECT THE APPLIANCE BEFORE USE, AND AT
LEAST ANNUALLY. MORE FREQUENT CLEANING
MAY BE REQUIRED DUE TO EXCESSIVE LINT
FROM CARPETING, BEDDING MATERIAL, PETS,
ETC. IT IS IMPERATIVE THAT THE CONTROL
COMPARTMENTS, BURNERS, AND CIRCULATING
AIR PASSAGES OF THE APPLIANCE ARE KEPT
CLEAN AND FREE OF OBSTRUCTIONS.
(S’ASSURER QUE LE BRÛLEUR ET LE
COMPARTIMENT DES COMMANDES SONT
PROPRES. VOIR LES INSTRUCTIONS
D’INSTALLATION ET D’UTILISATION QUI
ACCOMPAGNENT L’APPAREIL.)
Ceramic Logs, Burner, & Baffle
If the decorative ceramic log, burner, or baffle
material supplied with the Tucson is damaged or
parts are missing, they must be replaced with the
same, or approved Hearthstone replacement parts.
These components affect the combustion quality
and safety of the heater. Do not replace ceramic
logs, the burner, or baffle with unapproved ceramic
components or any other material.
We recommend you always wear gloves and safety
goggles while handling the ceramic log set, Heat
Wave baffle, and burner materials.
Electrical Hazard
If present, any three-prong grounded plug must be
plugged directly into a properly grounded three-
prong receptacle. Do not cut or remove the
grounding prong from any plug or otherwise attempt
to circumvent the grounding protection provided with
the unit. 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.
Do Not Light Pilot or Burner by Hand
The pilot light on this gas heater is lit by using an
electronic ignition module as described elsewhere in
this manual. Never attempt to light the pilot or main
burner by hand with a match or lighter.
Mobile Home Installations
This appliance may be installed as an aftermarket
appliance in a permanently located, manufactured
(mobile) home, where not prohibited by local codes.
(Cet appareil peut être installé dans un maison
préfabriquée (mobile) déjá installée á demeure si les
réglements locaux le permettent.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Proflame Control System & Features
NOTE: OPEN DOOR UNDER THE ASH LIP AND REMOVE MODESTY PANEL FOR ACCESS TO ELECTRICAL
AND GAS CONNECTIONS.
Tucson 8702 ST Model Overview
Power Supply
For the Tucson ST the power supply is the AC/DC
Power Adapter. This is packaged inside the
accessory box. To connect the adapter, simply
connect the output lead to the wire under the stove
marked “DC-SUPPLY”. Plug the input end into the
nearest 120V standard outlet.
Thermostat (sold separately)
You can connect to and control the Tucson ST with a
wall thermostat. The ON/OFF/T’stat switch or wall
mounted thermostat controls the Tucson. We
recommend installation of a 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.
Thermostat Placement
Place the thermostat 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 (sold separately)
Connect the thermostat to the Tucson ST using no
more than 40’ (12 m) of insulated thermostat wire.
The thermostat wire can be surface mounted or
routed under the floor, through walls, etc. Ensure you
leave a small coil of additional thermostat wire behind
the Tucson so that the unit is easily moved out of
position for servicing and cleaning.
Connect the thermostat wires to the wire harness
with the provided connection kit as per the
instructions on page 26. At the thermostat, connect
the wires to 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.
Proflame DFC Ignition Module
This is the command center for the appliance. The
DFC Module allows the pilot to run in the IPI mode or
the CPI mode. It signals the burner to light or shut
down and provides the ignitor with the electricity
needed for sparking. The DFC Module is powered by
the DC adaptor when 120V power is available or by
the backup batteries during a power outage.
SIT Manual Gas Valve
The valve has a manual flame turndown knob. This
control manually adjusts the flame height at the
desired level. All the gas flows through the valve and
is regulated by the built in regulator.
Pilot Assembly
The pilot assembly consists of a pilot hood, sensor
rod, and ignitor. The ignitor sends a spark to the pilot
hood which ignites the gas and lights the pilot. With
the pilot lit the sensor rod is engulfed by the flame,
flame rectification occurs and the appliance remains
lit. If the sensor does not stay engulfed by the flame
the main burner will not light and the pilot will shut
down.
Optional Remote Control (for ST model)
The Tucson ST does not come equipped with a
remote control. However there are two different
optional remote controls available. 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, use Kit #90-56912. If
you would like to control the temperature via the
remote control thermostat, use Kit #90-56914.
Installation instructions are provided with the kits.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
9
Tucson 8702 DX Model Overview
Proflame GTMF System
Photo 1 – Proflame GTMF System
The Proflame GTMF is a modular remote control
system that directs the functions of Tucson DX. The
Proflame GTMF System is configured to control the
on/off main burner operation, its flame levels, and
provides Manual and Smart thermostatic control of
the hearth appliance. The system controls two
remotely actuated 120V/60Hz power outlets. The Fan
outlet controls the fan speed through six levels, and
the Auxiliary outlet either on or off. There is also an
additional constantly powered 120V/60Hz outlet. The
system has battery backup power for burner
operation and control during power outages (see
page 25 for specifications).
Remote Transmitter
The Tucson DX comes equipped with a thermostatic
remote control transmitter. The easy to read LCD
display shows all functional abilities as well as a
childproof lockout and low battery indicator. It
displays room temperature readout, set temperature
readout and function status. The remote transmitter is
powered by three 1.5 volt AAA batteries. A Mode Key
is provided to index between the features and a
Thermostat Key is used to turn on/off or index
through thermostat functions.
Receiver
The Receiver accepts commands via radio frequency
from the Remote to operate the appliance. The
Receiver is powered (6V DC) by the Fan Control
Module and uses four 1.5 volt AA type batteries for
backup during power outages. The Receiver’s slider
switch is set to one of three positions: ON (Manual
Override), REMOTE (Remote Control) or OFF. The
ON selection turns the valve on (to high) if the
Remote becomes inoperative.
Fan Control Module
The Fan Control Module (FCM) is the main power
supply for the entire system when 120v AC is
available. The FCM is part of the blower assembly
(packaged separately). The FCM provides two 120V
remotely controlled outlets, and one constantly
powered outlet. The FCM allows the remote to
control the fan unit through 6 speeds and turns the
auxiliary outlet on and off. This module also powers
the Receiver and Ignition Module with 6v DC, making
the batteries in the Receiver a backup power source
expanding the life of the batteries. When 120V power
is not available the FCM will not operate.
The FCM 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.
Proflame DFC Ignition Module
This is the command center for the appliance. The
DFC Module allows the pilot to run in the Intermittent
(IPI) mode or the Constant (CPI) mode. It signals the
burner to light or shut down and provides the ignitor
with the electricity needed for sparking. The DFC
Module is powered by the FCM when 120V power is
available or by the batteries in the Receiver during a
power outage.
SIT Modulating Gas Valve
The remote transmitter can modulate the valve and
the flame to 6 different settings between high and
low. You can modulate the flame via the remote
yourself or by setting the remote control to the Smart
Thermostat modulation mode. Smart mode means
that as the room temperature approaches the limit set
for shut down the valve will automatically gradually
step down the flame height. The reverse happens
when the room cools - the valve will automatically
gradually increase the flame height.
Pilot Assembly
The pilot assembly consists of a pilot hood, sensor
rod, and ignitor. The ignitor sends a spark to the pilot
hood which ignites the gas and lights the pilot. With
the pilot lit the sensor rod is engulfed by the flame,
flame rectification occurs and the appliance remains
lit. If the sensor does not stay engulfed by the flame
the main burner will not light and the pilot will shut
down.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
10
Control Functions
Pilot Mode
Continuous Pilot (CPI): Running the Tucson 8702 in CPI mode will keep your pilot running even when the
thermostat does not call for heat and when the burner is not lit. This is an advantage in cold climates or under
windy conditions. The “standing pilot” helps to keep the venting warm and generate some draft within the
system. The standing pilot also keeps the firebox warm – greatly minimizing, or eliminating condensation
formation on the glass during startup. The ignitor will automatically spark whenever the pilot mode is switched to
CPI, regardless of the position of the receiver switch.
Intermittent Pilot (IPI): Using the IPI mode is a more efficient use of fuel as the pilot only ignites when the
thermostat calls for heat.
Photo 2 – Pilot Mode Switch
Remote Receiver (DX Only)
The Receiver is normally powered by the Fan Control Module or by four 1.5V AA batteries during a power
outage. The Receiver switch can be set to three different positions:
On: Manual override allowing the valve to function and ignite the burner without the remote transmitter. The
ignitor will spark automatically.
Remote: Remote Transmitter controls all functions of components.
Off: Turns off the stove. If CPI mode is selected, pilot will remain lit.
PRG: Used to synchronize the Transmitter and Receiver initially, and after each battery change (see page 39).
Photo 3 – Receiver Detail

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
11
Remote Transmitter (DX Model)
Photo 4 – Remote Transmitter Function Keys (remote color may differ from shown)
ON/OFF Key: Controls the main burner, blower, and
the modulation of both.
Thermostat Key: This is the function that sets either
the Manual or Smart thermostatic control.
UP/Down Arrow Key: Adjusts the thermostat
temperature range, flame settings, and fan speed.
Mode Key: Toggles through the component to be
controlled (burner, blower or auxiliary outlet)
The transmitter features a user-friendly layout with a
Blue LCD Screen for easier viewing.
Figure 1: Remote Transmitter Display Data

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
12
Specifications
LISTED:Gas-Fired Direct-Vent Fireplace Heater
Model: Tucson Direct-Vent Gas Fireplace
Heater (8702)
Testing Agency: Intertek Testing Services
NA, Inc. (ITS)
Tested to: ANSI Z21.88-2005, CSA 2.33b
2005, CAN/CGA2.17-M91
Certified for Canada, CSA P.4.1
Approved for Mobile Home Installation (see
page 7)
Certified for use by:
Board of State Examiners of Plumbers & Gasfitters
100 Cambridge Street, Room 1511
Boston, MA 02202
www.mass.gov
Figure 2: Model 8702 Dimensions
Specification NG LP
INPUT RATING (Btu/hr) 0-2000 ft 25,000 25,000
INPUT RATING (Btu/hr) 2000-4500 ft 24,200 24,800
ORIFICE SIZE (DMS) 0-2000 ft 41 53
ORIFICE SIZE (DMS) 2000-4500 ft 42 54
MANIFOLD PRESSURE - LO SETTING (in. W.c./kpa) 1.6/0.4 6.4/1.59
MANIFOLD PRESSURE - HI SETTING (in. W.c./kpa) 3.5/0.87 10.0/2.48
INLET PRESSURE - MINIMUM (in.w.c./kpa) 5.0/1.24 12.0/2.99
INLET PRESSURE – MAXIMUM (in. w.c./kpa) 7.0/1.74 13/3.22
MINIMUM INPUT RATING LO SETTING (btu/hr) 18,000 21,600
MAXIMUM OUTPUT (btu/hr) 0-2000 ft 17,350 19,100

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
13
Installation Preparation
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 (Installer
l’appareil selon les codes ou règlements locaux, ou,
en l’absence de tels règlements, selon les Codes
d’installation CAN/CGA-B149.)
Installation Codes can be obtained from:
AMERICAN NATIONAL STANDARDS
INSTITUTE, INC.
1430 BROADWAY
NEW YORK, NY 10018
www.ansi.org
NATIONAL FIRE PROTECTION ASSOCIATION,
INC.
BATTERY MARCH PARK
QUINCY, MA 02269
www.nfpa.org
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 to 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.)
This appliance is equipped for use at 0 to 2000 feet
(0-610 meters) altitude. (Cet appareil est equipè pour
des altitudes compries entre 0 et 2000 pieds (0-610
m) seulement.)
WARNING: DO NOT INSTALL OR USE THIS
APPLIANCE IF ANY PART WAS SUBMERGED
UNDER WATER. IMMEDIATELY CALL A
QUALIFIED SERVICE TECHNICIAN TO INSPECT
THE HEATER AND TO REPLACE ANY PART OF
THE CONTROL SYSTEM AND GAS CONTROL
THAT WAS UNDER WATER. (NE PAS SE SERVIR
DE CET APPAREIL S’IL A ÉTÉ PLONGÉ DANS
L’EAU, COMPLÈTEMENT OU EN PARTIE.
APPELER UN TECHNICIEN QUALIFIÉ POUR
INSPECTOR L’APPAREIL ET REMPLACER TOUTE
PARTIE DU SYSTÈME DE CONTRÔLE ET TOUTE
COMMANDE QUI ONT ÉTÉ PLONGÉS DANS
L’LAU)
Items Required for Installation
Accessory stone set
External regulator (for propane (LP) only)
LP conversion kit (not included, for propane
only))
Piping which complies with local codes
Pipe sealant approved for use with
propane (LP) (resistant to sulfur compounds).
Manual shutoff valve
Sediment trap (see page 27)
120 volt electrical service (Required for DX
model, optional for ST model)
Pipe wrench
Phillips head screwdriver
7/16-inch wrench
3/16” hex wrench
Other parts as required by local code
Safety Glasses
Gloves
Packing List
1- Tucson 8702 Gas-Fired Heater
1- Owner’s Packet Envelope (manual, warranty card)
1- Heat Wave Baffle (box on pallet)
1- Optional Screen Kit (in box with baffle)
5- Decorative Ceramic Logs (in firebox)
1- Enamel Touch-up Paint (in firebox)
1- Blower Assembly Box (DX Model) (on pallet)
1- Accessory Box (on pallet) containing:
1- Remote Control w/batteries (DX Model)
1- AC/DC Adaptor (ST Model)
1- 1” Valve Ctrl Extension Knob (ST Only)
1- Thermostat wire kit (ST Only)
1- 1 Package of four AA Batteries
1- Bag of Platinum Bright Embers
2- Side Stone Shields
2- Top Stone Clips
1- Bag of Screws
6- ¼ x 20 x 3/8” Pan Head
4- ¼ x 20 x 1” Leg leveling screws
1- 5/16 x 1” Flat Head hex drive
Note: Vent kits and components are supplied
separately. Failure to use the venting
components approved by Hearthstone for this
appliance will void your warranty.
Unpacking and Inspection
Hearthstone packages your Tucson to withstand
normal shipment without damage. However, damage
can still occur during transit. Take care to inspect for
damage when unpacking and installing the unit.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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DO NOT INSTALL, OR PUT INTO SERVICE, A
DAMAGED OR INCOMPLETE HEATER.
Note: We recommend you position your Tucson,
attach the venting, make the gas, electrical and
thermostat (if applicable) connections, and attach
any accessories before installing the stone set.
Remove the shrink-wrap and other packaging
materials taking care not to damage the stove’s
finish. Inspect the Tucson for visible or concealed
damage. The unit should be square and true. The
stone set should be complete and without damage.
The sheet metal parts should be smooth and free of
bends and dents. Any enameled cast iron should be
free of chips or cracks. If visible or concealed
damage is found or suspected, contact your dealer
for instructions.
Always use gloves and eye protection when handling
the decorative ceramic fire logs, burner, and Heat
Wave baffle. Use care when handling these parts as
they are fragile and subject to damage and breakage
if handled roughly.
See the firebox access instructions on page 15 and
remove the log set. Unpack and inspect the logs for
damage. Inspect the ceramic burner. Open the other
boxes and inspect the components. If log, burner,
baffle, or any other component damage is
encountered, contact your dealer for a replacement.
Otherwise, set the logs and other components aside
until called for during the installation.
Dismounting from Pallet
With the accessory boxes removed and set aside,
remove the three screws that fasten the unit to the
shipping stands on the pallet (see photos 5 & 6).
Take care not to mar or chip the stove’s finish. Have
someone help lift the stove forward and off the pallet,
taking care to avoid damaging components mounted
under the stove.
Photo 5 – Rear Shipping Clip Detail
Photo 6 – Front Shipping Clip Detail (right side shown)
Installing Leg Levelers
If your hearth surface in uneven, or is not level, you
can install the four provided leveling screws. The ¼ x
20 x 1” oval tip set screws are installed down through
the threaded hole in the inner flange on the bottom of
the stove’s feet. Adjust the screws only enough to
keep the stove from rocking, or wobbling. On
thinner hearths, or hearth pads, adjusting the screws
so the entire stove’s weight is solely supported on
them can cause damage to your hearth.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Firebox Access
1. First, remove the top of the stove (lift off). Set
carefully aside on a soft surface.
Photo 7 – Removing Top
1. Leave the top heat shield in place – no need to
remove for firebox access.
Photo 8 - Top Heat Shield
2. Lift the front panel slightly to disengage the tangs
at its top – tilt the front toward you slightly and lift
it up out of the bottom slots and set aside on a
soft surface.
Photo 9 – Front Panel Mounting Tang Detail
Photo 10 – Front Panel Retaining Slots
3. If installed, remove screen by lifting off glass
frame.
Photo 11 – Screen Detail
4. Pull forward and disengage the spring clips
securing the top of the glass frame. See Photo
12. Tilt the top of the glass frame outward and lift
it out of the slots on the bottom – set carefully
aside.
Photo 12 – Glass Spring Clip Detail
5. Reinstall by reversing the previous steps. If
desired, you do not need to reinstall the screen.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Clearances to Combustibles
Note: Ensure clearances are in accordance
with local installation codes and the
requirements of the gas supplier.
Clearance to Combustibles
Due to high surface temperatures, locate the unit out
of traffic areas and away from furniture and
draperies. Do not place clothing and other
flammable material 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 Figures 3 - 6.
Note: The rear clearance to combustibles is
determined by either the unit’s or the vent pipe’s
minimum clearance, depending on whether the
installation calls for vertical rise within the room or a
rear exit, through-the-wall vent pipe.
Ensure you 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 clearance for the blower
assembly if present, or planned in the future.
CAUTION: 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.
Hearth Requirement/Floor
Protection
You can place the Tucson directly on any non-
combustible surface or on a wood floor. When
placing the Tucson on any other type of combustible
surface you must install a panel made of metal,
wood, stone, or glass under the appliance. The
panel must extending the full width and depth of the
appliance. Installations must meet all local codes.
Figure 3: Minimum Wall Clearances
Figure 4: Horizontal Vent Mantle Clearance

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Figure 5: Snorkel Termination Mantle Clearance
The corner clearance for the Tucson 8702 is 4”,
measured from the edge of the top castings, to the
adjacent wall.
Figure 6: Corner Clearance

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Venting Information
Venting Components
Starter collar is installed by Hearthstone.
Use the following instructions along with the pipe
manufacturer’s instructions to complete the
installation. Do not mix vent components from
different manufacturers within the same venting
system.
Approved Venting Manufacturers
The Tucson Direct Vent (8702) is approved for
installation only with the venting components
provided by manufactures listed on this page.
Simpson Dura-Vent, Inc.
P.O. Box 1510
Vacaville, CA 95696-1510 800-835-4429
American Metal Products (AmeriVent)
8601 Hacks Cross Rd.
Olive Branch, MS 38654 800-423-4270
Selkirk Corporation
1301 W. President George Bush Hwy, Suite 330
Richardson, TX 75080-1139 800-992-8368
Security Chimneys International Ltd (Secure Vent)
2125 Monterey, Laval, Quebec
Canada, H7L 3T6 450-973-9999
ICC, Inc.
400 J-F Kennedy, St. Jerome, Quebec
Canada, J7Y 4B7 450-565-6336
Metal-Fab, Inc.
P.O. Box 1138
Wichita, Kansas 67201 316-943-2351
Venting Terminations
The Tucson cannot be vented jointly with any other
solid fuel or gas appliance. It must be vented directly
to the outside of the building using a proper
termination as listed in this manual. After
determining the venting configuration for your stove,
select the vent system that will best accommodate
your installation.
CAUTION: ENSURE ALL STOVE AND
TERMINATION CAP CLEARANCES ARE
OBSERVED PER THIS OWNER’S MANUAL.
CAUTION: ENSURE THERE IS NO WIRING OR
PLUMBING IN THE CHOSEN LOCATION.
CAUTION: DO NOT RECESS VENTING
TERMINALS INTO A WALL OR SIDING.
Approved Venting Configurations
WARNING: IN HIGH WIND AREAS AND
PARTICULARLY COLD CLIMATES IT MAY BE
NECESSARY TO HEAT YOUR VENT SYSTEM
WITH THE PILOT PRIOR TO IGNITION OF THE
MAIN BURNER. IN THESE INSTANCES IT IS
RECOMMENDED THAT YOU LEAVE THE PILOT
RUNNING FOR 5 MINUTES PRIOR TO IGNITING
THE MAIN BURNER. THIS WILL ALLOW FOR
PROPER START UP AND IGNITION OF ALL
PORTS ON THE BURNER.
There are three types of venting configurations
approved for use with this appliance:
Vertical Venting/Vertical Termination
Vertical Venting/Horizontal Termination
Horizontal Venting/ Snorkel Termination
Pipe Clearances to combustibles:
1" to vertical runs
1" below and to the side of horizontal runs
2" from the top of horizontal runs
Vertical Venting and Termination
The Tucson 8702 is approved for venting vertically
through a roof or ceiling. When installing a vertical
vent and/or vertical terminations you must adhere to
the following requirements:
When terminating vertically you must have at
least 10’ of vertical pipe.
Always maintain a minimum of 1” clearance from
all sides of the vent system to any combustible
material.
A listed fire stop is required at any floor
penetration. The opening must be framed in
according to the venting manufacturer’s
instructions.
Steep roofs, nearby trees, or predominantly
strong windy conditions can promote poor draft
or down draft conditions. In this event, an
increase to the height of the vent may improve
performance.
A maximum of two 90⁰or four 45⁰elbows may
be used in vertical terminations. (This includes
the one 45⁰elbow off the stove outlet)
Whenever possible use 45⁰elbows instead of
90⁰elbows as they offer less restriction to the
flue gases.
Vertical terminations may require additional
restriction in order to perform as intended.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Please refer to Figure 10 and Photos 13 & 14 to
adjust your vent restrictor accordingly
All termination caps must be no less than 18”
(457mm) horizontally from any roof or vertical
surface. See Figure 6.
The termination must fall within the chart in
Figure 10.
The maximum vertical run is 35’
The vent/air intake termination clearances above the
high side of an angled roof are as follows:
Roof Pitch Feet Meters
Flat to 6/12 10.3
7/12 to 9/12 20.6
10/12 to 12/12 41.2
13/12 to 16/12 61.8
17/12 to 21/12 82.4
Figure 6: Termination Cap clearances
Prefabricated & Fireplace Chimney
Installations
The Tucson 8702 is approved for use with direct
vent chimney conversion kits in masonry or
prefabricated solid fuel listed chimneys. The
following installation requirements must be followed:
The termination must fall within the chart shown
in Figure 10.
In a masonry chimney, a fireclay liner or listed
steel liner, must be present the entire length of
the chimney.
The maximum length of vent is 35’.
The liner must have an inside dimension or
diameter 6” or greater.
Prefabricated chimneys must be UL103 or ULC
S-629 listed and have a minimum INSIDE
diameter of 6”. Prefabricated chimneys must be
listed for the specific manufacturer’s conversion
kit.
The use of an existing chimney as an air intake is
not listed under the ANSI Z21.88-1999-CSA 2.33-
M99 test methods; this installation has been tested
and approved by Intertek Testing Services with an
appropriate test. The code authority having
jurisdiction must be consulted prior to proceeding
with this installation method.
Horizontal Termination
The termination must fall within the area shown
in Figures 6 & 7.
A minimum of 9" rise is required either directly
off the heater or with the use of a minimum of a
14” snorkel.
Use a vinyl siding Stand-Off when installing
against vinyl siding. The termination cap must
not be recessed into the wall or siding. Do not fill
air spaces with any type of insulation material.
A minimum 10” X10” square hole is necessary
for proper pipe clearance through a wall,
provided the vent is positioned to maintain 2”
minimum clearance at the top. A 1” minimum
clearance must be maintained to combustible
materials around the other sides.
All horizontal terminations must also comply with
the clearance specifications to adjacent
structures outlined in Figure 6.
Horizontal sections require a 1/4" rise every 12"
of horizontal run.
NOTE: For each 900 elbow after 2, remove 5' from
the allowable horizontal run. For Canadian
installations: remove 4' from the allowable
horizontal run.
At minimum vertical rise, maximum horizontal
run is 10’. (If a 14” snorkel termination is used a
maximum horizontal run of 10’ is also
applicable.)
WARNING: FAILURE TO USE ONLY PARTS
SPECIFICALLY APPROVED FOR USE WITH THIS
APPLIANCE MAY RESULT IN PROPERTY
DAMAGE OR PERSONAL INJURY.

Hearthstone Quality Home Heating Products, Inc. Tucson DX/ST Model 8702
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Figure 7: Acceptable Direct Vent Terminal Vent Cap Locations
A = Clearance above grade, veranda, porch, deck,
or balcony: 12 inches (30cm) minimum.
B = Clearance to window or door that may be
opened: **Min. 9 inches U.S./*12 inches (30cm)
CAN. We recommend 12 in, minimum to prevent
condensation on the window.
C = Clearance to permanently closed window: **Min.
9 inches, U.S./*12 inches (30cm) CAN.
We recommend 12 in. minimum to prevent
condensation on the window.
D = Vertical clearance to ventilated soffit located
above the termination within a horizontal distance of
2 feet (60cm) from the center line of the termination:
18 inches (46cm) minimum.
E = Clearances to unventilated soffit: 12 inches
(30cm) minimum.
F = Clearance to outside corner: **Min. 9 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where windy
conditions prevail.
G = Clearance to inside corner: **Min. 6 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where strong
winds prevail.
H = *Not to be installed within 15 feet (4.5m) above
a meter/regulator assembly within 3 feet (91cm)
horizontally from the center line of the regulator.
I = Clearance to service regulator vent: 3 feet (91cm)
J = Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance: 12inches (30cm) minimum.
K = Clearance to a mechanical air supply inlet:
**Min. 3 feet (91cm) above if within 10 feet
horizontally, U.S./*6 feet (1.83m) CAN minimum.
L = ¹Clearance above paved sidewalk or a paved
driveway located on public property: 7 feet (2.1m)
minimum.
M = ²Clearance under veranda, porch, deck, or
balcony: 12 inches (30cm) minimum.
*In accordance with CSA B149 Installation codes.
**In accordance with the current ANSI Z223.1/NFPA 54,
National Fuel Gas Code. Note: Local Codes and
Regulations may require different clearances.
¹A vent shall not terminate directly above a sidewalk or
driveway which is located between two single family
dwellings and serves both dwellings
²Only permitted if veranda, porch, deck or balcony, is fully
open on a minimum of two sides beneath the floor.*