HearthStone Stowe 8320 Troubleshooting guide

Owner’s Manual & Installation Guide
for the Stowe(8320) GAS-FIRED
DIRECT 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 #8320
6400-40422
05-22-03

HearthStone Quality Home Heating Products Inc STOWE Gas-Fired Direct Vent heater
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HearthStone
Quality Home Heating Products
317 Stafford Avenue,
Morrisville, Vermont 05661
E-Mail: [email protected]

HearthStone Quality Home Heating Products Inc STOWE Gas-Fired Direct Vent heater
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INFORMATION SHEET
Record, on this page, all relevant information concerning the purchase, installation, and maintenance
of your STOWE Gas-Fired 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 (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 STOWE 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

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INTRODUCTION
Congratulations on your purchase of a
Stowe Gas-Fired Direct Vent heater. The
Stowe, by HearthStone, incorporates the
latest in balanced vent gas technology,
which will provide you with clean, efficient
heat for years to come.
The Stowe 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 Stowe 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/Thermostat switch is set to
“Thermostat”, 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 a speed
blower fan, Kit #93-57001, which turns on
and off independently of the burner flames.
The switch allows you to turn the fan on or
off and control the speed of the fan to suit
your needs. Regardless of the speed the fan
is set, the fan will automatically come on
when the unit heats up.
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.

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TABLE OF CONTENTS
READ THIS OWNER’S MANUAL........1
INTRODUCTION...........................................4
SAFETY INFORMATION...............................5
FIRE HAZARD........................................... 6
SERVICE CAUTION ................................... 6
HOT SURFACES ........................................ 6
CERAMIC FIBER LOG SAFETY
INFORMATION.......................................... 7
SPECIFICATIONS:.................................7
OWNER’S INFORMATION............................8
ROUTINE MAINTENANCEAND CARE.......10
FIREBOX, PILOT, & BURNER TUBES .......11
INSTALLER’S INFORMATION ....................11
UNPACK AND INSPECT FOR DAMAGE ..... 12
VENTING INFORMATION...........................16
ELECTRICAL CONNECTIONS ....................22
GAS SUPPLY & CONNECTIONS.................25
LOG PLACEMENT .....................................26
LIGHTING THE UNIT FOR THE FIRST TIME
...................................................................28
INITIAL ADJUSTMENTS.............................29
MAINTENANCE AND CARE........................32
PARTS LISTS .............................................34
SAFETY INFORMATION
Your Stowe 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.)
Do not use this appliance if any part has been
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 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
¦
WARNING:
A qualified s
ervice technician should do
installation and repair. A qualified
service technician should inspect the
appliance before use and at least annually.
More frequent cleaning may be required
due to excessive lint from carpeting,
bedding material, etc. It is
imperative that
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’utilis
ation qui
accompagnent l’appareil.)

HearthStone Quality Home Heating Products Inc STOWE Gas-Fired Direct Vent heater
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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 Stowe should be
located out of traffic and away from
furniture, draperies, clothing, and flammable
material.
SHOCK HAZARD
When the optional blower is installed, 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 Stowe 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
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 Stowe 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.
¦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 OR STRIKE
GLASS.

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CERAMIC FIBER LOG SAFETY INFORMATION
If the decorative ceramic log material supplied with the Stowe 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.
SPECIFICATIONS:
LISTED: DIRECT VENT GAS HEATER
Listed: DV Gas Heater
Model: Stowe DV Room Heater
Testing Agency: Intertek Testing Services
NA Inc. (ITS)
Tested to: ANSI Z21.88-1998, CSA 2.33-
M98, CAN/CGA2.17
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts
02202
NG LP
Input rating (Btu/hr) 0-2000ft 25,000 25,000
Maximum output (Btu/hr) 0-2000ft 24,400 24,000
Minimum input rating (Btu/hr) 14,500 14,300
Orifice size DMS 0-2000ft 40 53
Man. pressure-HI setting (in.w.c./kPa) 3.5/0.87 10.0/2.48
Man. pressure-LO setting (in.w.c./kPa) 1.2/0.30 3.3/0.80
Inlet pressure-HI (in.w.c./kPa.) 7.0/1.74 13.0/2.75
Inlet pressure-Lo (in.w.c./kPa) 5.0/1.24 11.0/2.88

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OWNER’S INFORMATION
The installation must conform with 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
règlements locaux, ou, en l’absence de tels
règlements, selon les Codes d’installation
CAN/CGA-B149.)Do not use this appliance
if any part has been 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, 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.
LIGHTING INSTRUCTIONS
NOTE: The gas control knobs and the piezo
ignitor are located behind the control valve
access door, under the front of the unit.
1. STOP! Read the What To Do If You
Smell Gas! Warning (on the cover of
this manual).
2. Set the on/off/T’STAT switch or
thermostat
to the “OFF” position.
3. Push in and turn gas control knob
clockwise to “OFF”. (If not previously
lit, the knob should be in this position.)
4. Wait (5) five minutes to clear out any
gas. If you then smell gas, STOP! Smell
all around the appliance area for gas.
Be sure to smell next to the floor
because some gases are heavier than air
and will settle on the floor. If you smell
gas immediately follow the What To Do
If You Smell Gas! warning on the cover
of this Manual. If you do not smell gas,
proceed to the next step.
5. Set the ON/OFF/T’STAT switch to
“ON” or, if the thermostat has been
installed, “T’STAT”.
6. Turn gas control knob counter-clockwise
to “PILOT”.
7. Push in control knob all the way and
hold in. Immediately light the pilot with
the gas lighter (push in and “click” the
piezoelectric spark ignitor button several
times until lit). Continue to hold the
control knob in for about 20 seconds
after the pilot is lit. Release the knob and
it will pop back out. Pilot should remain
lit. If the pilot goes out, repeat the
operation.
* If knob does not pop out when released,
stop, shut off the gas supply to the heater
and immediately call a qualified service
technician or gas supplier.
* If the pilot will not stay lit after several
tries, turn the gas control knob “OFF” and
call a qualified service technician or gas
supplier.
8. After the pilot lights, turn gas control
knob counter-clockwise to “ON”.
9. Shut the gas control valve access door.
10. If the ON/OFF/T’STAT switch is set to
“ON”, the stove should now be lit. If the
thermostat (or remote) has been
installed, set the ON/OFF T’STAT
switch to “T’STAT” and turn the
thermostat (or remote) to “ON”. Then
set the desired temperature.
NOTE: When pressing/clicking the
piezoelectric spark ignition button to light
the pilot, watch through the glass (front) of
the unit. Click the ignitor button until a
flame is visible at the pilot. Once the pilot is
lit, continue to press on the gas control knob
for another 20 seconds, then release.
Ascertain that the pilot is still lit by looking
through the front door. If lit, then turn the
gas control knob fully counter-clockwise to

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the “ON” position. If the pilot fails to light,
or if it went out due to a premature release
of the gas control knob while pressed in the
“PILOT” position, wait 60 seconds for the
Interlock to release. Then repeat the lighting
process as described in this section of the
manual.
Once the pilot has been lit, the gas control
knob has been turned to the “ON” position,
and the ON/OFF/T’STAT switch has been
turned to “ON”, the main burners should
light immediately. If you would like to use
the thermostat and it has been installed,
switch the ON/OFF/T’STAT switch to
thermostat. Turn the thermostat to "ON" and
set it to a higher position so that it "calls" for
heat in order to turn light the main burners
(i.e. turns the unit on). Note that the
thermostat controls the on/off cycling of the
main burners, but the pilot remains lit
regardless of the thermostat setting. The
only way to turn the pilot off is to turn the
gas control knob fully clockwise to the
“OFF” position.
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to the “OFF”
position or turn the ON/OFF/T’
STAT switch to the “OFF” position.
2. If shutting the unit off for the non-
heating season, turn the gas control
knob fully clockwise to the “OFF”
position. Do not force the knob to
turn.
DAILY OPERATION
The Stowe gas-fired heater is easily operated
by the homeowner once installed and
adjusted by a qualified service technician.
Following is a list of the controls available
to the owner/user:
A. ON/OFF/PILOT………Built into Valve
B. VARIABLE OUTPUT
CONTROL……………Built into Valve
C. ON/OFF/T’STAT
SWITCH…………………...…Standard
D. THERMOSTAT………………Standard
E. REMOTE CONTROL (w/o
thermostat)…………………....Optional
F. REMOTE CONTROL
(w/thermostat)…………….…..Optional
G. BLOWER……………………..Optional
A. ON/OFF/PILOT
The valve is equipped with two “control
knobs”. One is the ON/OFF/PILOT
knob, located on the front left side of the
valve. When in the “OFF” position, the
unit cannot operate at all. When in the
“PILOT” position, the pilot light can be
lit, but that is all. When in the “ON”
position, the unit may be on
continuously, or it may be “waiting” to
be controlled by the thermostat or
remote, depending on the setting of the
other controls.
B. VARIABLE OUTPUT CONTROL
The Variable Output Control knob,
located on the front right side of the
valve, controls the “rate” heat is
produced. By adjusting the variable
output control 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 you can select
the optimum flame size for you setting
and application.
C. ON/OFF/T’STAT SWITCH
The ON/OFF/T’STAT switch controls
how the unit will operate, continuously
or by thermostat. When the switch is in
the “ON” position, the main burner

HearthStone Quality Home Heating Products Inc STOWE Gas-Fired Direct Vent heater
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will stay on constantly, and the
thermostat will not operate. When the
switch is in the “T’STAT” position, it
will operate via the thermostat, running
only when the thermostat “calls” for
heat. When the switch is in the “OFF”
position, the pilot remains lit but the unit
can not operate, as the main burner can
not light.
D. THERMOSTAT
The unit may be controlled
automatically via the wall-mounted
thermostat. By setting the
ON/OFF/T’STAT switch to “T’STAT”,
and setting the desired room
temperature, the unit will cycle on and
off as needed to maintain the requested
temperature.
E. REMOTE CONTROL (w/o thermostat)
The unit may also be partially controlled
via the OPTIONAL remote control, Kit
#90-56912. When the ON/OFF/T’STAT
switch is in the “T’STAT” position, it
allows you to turn the stove “On” &
“Off” from anywhere in the vicinity of
the unit, and is available through your
local HearthStone dealer.
F. REMOTE CONTROL (w/thermostat)
The unit may also be fully controlled via
the OPTIONAL REMOTE CONTROL
w/thermostat, available through your
local HearthStone dealer Kit #90-56914.
When the ON/OFF/T’STAT switch is in
the “T’STAT” position, this Remote
allows you to turn the unit “On” & “Off”
and also allows you to control the
temperature of the stove from anywhere
in the vicinity of the unit.
G. BLOWER
The unit may be equipped with an
OPTIONAL variable blower fan,
available through your local HearthStone
dealer Kit #93-57001. The fan helps to
circulate heat away from the stove.
Note: The ON/OFF/T’STAT switch or the
T’STAT controls the on/off cycling of the
main burners, but the pilot remains lit
regardless of any of the control settings (B-
G) listed previously, except the
ON/OFF/PILOT control knob, which is the
only way to turn the pilot off. Turning the
gas control knob fully clockwise to the
"OFF" position will turn off the pilot.
During the summer, non-heating season,
switch the wall thermostat and rocker
switches to “OFF”, and turn off the pilot.
This will improve the overall efficiency of
the unit, as the heat from the pilot is not
wanted in the summer. When putting the
unit back into service follow the “Lighting
of the Unit” portion in the “How To Turn
On & Off” section of this manual.
When the unit is first lit, especially when
cool, it is normal to experience some
condensation on the inside of the glass
window. This condensation will burn off
within the first few minutes of operation. If
continuous condensation or water drips are
noted from any part of the unit, immediately
discontinue operation of the unit and contact
a qualified service technician.
ROUTINE MAINTENANCE
AND CARE
The Stowe requires minimal routine
maintenance and care. The unit should
always be cool and off when being cleaned.