HearthStone Sterling-Ht 8532 Troubleshooting guide

Owner’s Manual & Installation Guide
for the Sterling-Ht(8532)
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 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
neighbor’s phone. Follow your gas supplier’s
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.
In the Commonwealth of Massachusetts, all
installation of gas lines and gas fitting shall only
be done by a licensed gas fitter or licensed
plumber.
AVERTISSEMENT: Assurez-vousdebiensuivre les
instructionsdonné dans cettenotice pourréduireau
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’instal
lation et service doit être exécuté par un
qualifié installer, agence de service ou le
fournisseur de gaz.
01-04-2005 Model # 8532
317 Stafford Avenue,
Morrisville, Vermont 05661-8695
E-Mail: [email protected].

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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INFORMATION SHEET
Use this page to record all relevant information concerning the purchase, installation, and maintenance of your
STERLING Ht 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 STERLING heater. 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 STERLING-Ht Gas-Fired Direct Vent heater
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WELCOME
Congratulations on your purchase of HearthStone’s
Sterling Ht Gas-Fired Direct Vent heater. The
Sterling incorporates the latest in balanced vent gas
technology, which will provide you with clean,
efficient heat for years to come. Combustion air
comes directly from the outside of your home to the
sealed firebox system, eliminating the potential for
annoying back drafts or other problems associated
with home depressurization. The combination of
natural stones with cast iron gives the Sterling a
pleasing look, which can be maintained with
minimum care.
The Sterling 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.
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 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.
ALWAYS VENT TO THE OUTSIDE
Never vent the gas heater to other rooms, or
buildings. Do not connect this gas appliance to a
chimney flue serving a separate solid-fuel burning
appliance.
MANUFACTURED BY:
HearthStone Quality Home Heating Products, Inc.
317 Stafford Avenue
Morrisville, Vermont 05661-8695
USA
TABLE OF CONTENTS
WELCOME...................................................2
OWNER’S INFORMATION............................3
LIGHTING INSTRUCTIONS .................................4
DAILY OPERATIONS.........................................4
INSTALLER’S INFORMATION ......................5
UNPACKING AND INSPECTION ..........................5
STOVE DIMENSIONS & CLEARANCES TO
COMBUSTIBLES ................................................6
VENTING INFORMATION.............................9
ATTACHING YOUR VENTING..........................15
GAS CONNECTIONS ..................................16
LOG PLACEMENT ...........................................17
INSTALLATION OF THE LOG SET.....................17
REMOVAL OF THE LOG SET ............................18
LIGHTING THE UNIT FOR THE FIRST TIME19
INITIAL ADJUSTMENTS...................................19
GAS CONVERSIONS...................................20
ROUTINE MAINTENANCE AND CARE.......20
PARTS LISTS .............................................22
TROUBLESHOOTING GUIDE ..................24
LIMITED WARRANTIES............27

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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SERVICE CAUTION
Any shield, door, or other component removed for
servicing must be replaced prior to operating. Any
components of the stove removed for servicing must
be replaced prior to operating. If you believe your
Sterling is not 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”. Ensure the unit is
cool before servicing and cleaning. Any safety
screen, guard, or component removed during
servicing must be replaced before operation. Do
not use any components other than those approved
by HearthStone Quality Home Heating Products,
Inc., otherwise all warranties are void. Do not
substitute components!
FIRE HAZARD
Do not store or use gasoline, or other flammable
vapors or liquids near this appliance. The Sterling
should be located out of traffic, and away from
furniture, draperies, clothing, and other flammable
materials.
SHOCK HAZARD (IF EQUIPPED WITH ACCESSORY FAN) The
accessory blower is equipped with a three-prong
(grounding) plug for protection against shock hazard
and must be plugged directly into a properly
grounded three-prong receptacle. Do not cut or
remove the grounding prong from the plug.
HOT SURFACES
Certain exposed surfaces of the Sterling 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
other flammable materials. Children and adults
should be alerted to the hazards of high surface
temperatures and must stay away to avoid burns
to skin or possible clothing ignition. Ensure that
young children are carefully supervised when in
the same room as the appliance.Clothingorother
flammable material must 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
bya licensed or qualified service person. Only
open front for routine service. Do not slam, or
strike the glass.
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 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.)
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts 02202
WARNING!
A qualified service
technician should do
installation, and repair. 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 impe
rative 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.)

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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LIGHTING INSTRUCTIONS
The gas control knob is located on the top of the
stove, in the rear, right-hand corner.
1. Set the on/off/T-stat switch or thermostat to the
off position.
2. Unplug the blower accessory, if so equipped
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 (LPG) 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, go to the next step.
5. Turn gas control knob counterclockwise to
“PILOT”.
6. Push in control knob all the way and hold
in.(You should hear the clicking of the piezo
ignitor in the firebox) Verify ignition of the pilot.
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
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.
7. Turn gas control knob counterclockwise to
“ON”.
8. Select “ON” or “T-STAT” position on the
on/off/t-stat switch.
9. Plug in the blower accessory, if so equipped.
10. Set thermostat to “ON” and set the desired
temperature setting.
Normally, if the “T-STAT” position was selected, the
main burner is cycled on and off by the Thermostat
or the “on”, “off” switch located on the bottom of the
Thermostat body.
TO TURN OFF THE GAS TO THE APPLIANCE
Turn the gas control knob clockwise to “OFF”
position. If shutting the unit off for the non-heating
season, this will improve the overall efficiency of the
unit as the heat from the pilot is wasted in the
summer. When putting the unit back into service
follow the lighting instructions described on this
page.
VARIABLE OUTPUT CONTROL
The gas control valve is equipped with a variable
output control. This control varies the rate of heat
produced by the unit by varying the gas pressure to
the ember burner.
DAILY OPERATIONS
The homeowner easily operates the Sterling gas-fired
heater. The unit comes with a standard thermostat.
Remote thermostats, or wall switches are available
for purchase from your local HearthStone dealer.
Once the thermostat is installed and properly
adjusted, the desired room temperature is maintained.
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. Also available is a variable speed blower.
(Kit# 95-57320)

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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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, which 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.)
CERAMIC FIBER LOG SAFETY INFORMATION
If the decorative ceramic logs supplied with the
Sterling are damaged, they must be replaced. The
manufacturer, through your local HearthStone dealer,
supplies replacement parts. Do not replace ceramic
logs with any materials not approved by HearthStone
Quality Home Heating Products, Inc.
UNPACKING AND INSPECTION
Unpack and Inspect for Damage
The Sterling is packaged by the manufacturer to
withstand normal shipment without damage.
However, damage can still occur during transit, so
take care to inspect for damage when unpacking and
installing the unit. If any damage, or a missing part, is
detected, immediately contact your dealer. Do not
install or put into service a damaged or incomplete
heater.
The unit should appear to be square and level. The
sheet metal parts should be smooth and free of bends
or dents. The enameled cast iron should be free of
chips or cracks. If visible or concealed damage is
found, contact your dealer.
The decorative ceramic fiber logs supplied with the
Sterling are located in the firebox. Always use great
care when handling the decorative ceramic logs, as
they are very fragile and subject to damage and
breakage. To open the front, grasp both sides of the
front cast facade, toward the bottom, and lift upward
and then outward. The bottom will slide up and out.
The whole piece is then easily removed. Set the front
aside taking care not to chip or scratch the enamel.
Next, locate the two rotating clips above the glass.
Rotate the clips out of the “locked” position and tilt
the top of the glass outward. Lift the entire glass up
and out. The log set can now be inspected for
damage. To take the unit off the pallet, remove the
lag bolts, which fasten the unit to the pallet. Take
care not to chip the enameled legs. Have someone
help lift the stove off the pallet, and set it into place.
Packing List
1-Sterling Gas-fired Heater containing:
3-Decorative Ceramic Fiber Logs
1-AA Battery
1-Owner’s Manual and Warranty
1-Thermastat and wire
1-LP Conversion kit

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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•WARNING! Do not operate the stove with
the glass front removed, cracked, or
broken.
ITEMS REQUIRED FOR INSTALLATION
* External regulator (for propane/L.P.G. only)
* Piping which complies with all codes
* Pipe sealant approved for use with propane/L.P.G.
(resistant to sulfur compounds)
* Manual shutoff valve
* Sediment trap (page 16)
* Tee joint
* Pipe wrench
* Phillips head screwdriver
* Other parts as required by local code
*Safety Glasses
*Gloves
*Stone Set
AIR SUPPLY
The Sterling Direct-vent does not require additional
installer provided ventilation.
STOVE DIMENSIONS & CLEARANCES TO
COMBUSTIBLES
Always maintain clearances around the stove, as
shown in the Clearances to Combustibles figures.
This allows for adequate ventilation.
Sterling Dimensions
If this appliance is to be installed on carpeting, vinyl
tile or combustible material other than wood flooring,
it must be installed on a metal or wood panel extending
the full width and depth of the stove.

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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18" (458mm)
3" (76mm)
14" (355mm)
3" (76mm)
Corner Installations
2" (51mm)
Floor Alcove or Mantel Installations
4" (102mm)
2" (51mm)
Parallel Installations 1" (26mm)
2" (51mm)
CLEARANCE TO COMBUSTIBLES
SPECIFICATIONS:
LISTED: DIRECT VENT GAS HEATER
Model: 8532-Sterling Ht DV
Testing Agency: Intertek Testing Services NA, Inc. (ITS)
Tested to: ANSI Z21.88-1998•CSA 2.33-M98 CAN/CGA 2.17
* You may keep your orifices the same if you wish to burn at the lower 33,000 btus with the top exit kit.
Venting Exit Type
Rear Exit –5”x8”
Pipe *Top Exit –4”x6” Pipe
Gas Type
NG LP NG LP
Input rating (Btu/hr) 0-
2000ft
33,000 33,000 38,000 38,000
Maximum output (Btu/hr) 0-2000ft 26,600 27,400 30,200 31,300
Minimum input rating (Btu/hr)
13,600 11,900 13,900 11,600
Orifice size DMS 0-2000ft 43,52 55,63 38,51 53,63
Man. pressure-HI setting (in.w.c./kPa) 3.5/0.87 10.0/2.48 3.5/0.87 10.0/2.48
Man. pressure-LO setting (in.w.c./kPa) 1.2/0.3 3.3/0.8 1.2/0.3 3.3/0.8
Minimum inlet pressure (in.w.c./kPa.) 5.0/1.24 11.0/2.88 5.0/1.24 11.0/2.88
Maximum inlet pressure (in.w.c.) 7.0 13 713

HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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HearthStone Quality Home Heating Products, Inc STERLING-Ht Gas-Fired Direct Vent heater
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VENTING INFORMATION
The Sterling is approved for installation only
with the following venting manuafcturers
products.
•Simpson Dura-vent Direct Vent GS
•AmeriVent Direct
•Secure Vent systems
•Selkirk Direct-Temp™
WARNING
This appliance must not be connected to a chimney
flue serving a separate solid-fuel burning appliance.
The Sterling can be vented two ways:
A) Straight out the back exit, using 5”x8” pipe.
B) Top exit, using kit #95-60320. If you want to
run your vent vertically, you must buy this
vertical vent kit which will convert the venting
pipe to 4"x6". The restrictor will be part of this
kit. No restrictor is needed for a horizontal
exit.
When referring to the rest of this section ensure
which way your unit is being vented.
APPROVED VENTING SYSTEM COMPONENTS
Component Description
900 Elbow
450 Elbow
6" Straight
9" Straight
12" Straight
24" Straight
36" Straight
48" Straight
11"-14 5/8" Adjustable Pipe Length
Horizontal Vent Cap
Vertical Vent Cap
Snorkel 36”
Vinyl Siding Standoff 4 x 65/8”
Round Ceiling Support Wall
Thimble Covers
Wall thimble
If the vent air intake system, for any reason, is
disassembled, it must be reinstalled per the
instructions provided for in the initial installation.
Allowable Venting Configuration Graphs
When determining the venting configuration, you
must consider the position of the termination cap.
There are 5 possible categories.
A) Fireplace & Existing chimney
installation
B) Horizontal termination for 5”x8” pipe
C) Horizontal termination for 4”x6” pipe
D) Vertical termination straight or 2 45O
elbows (4”x6” pipe only)
E) Vertical termination, 1 or 2 90O elbows
(4”x6” pipe only)
Every venting configuration must fall into one of
these categories.
The vent/air intake termination clearances above the
high side of an angled roof as follows:
The termination cap must not
be recessed into a wall or
ceiling
Note:
If the unit is vented vertically, 4”x6” pipe
must be used.
If using Top Exit Kit, a 24” section of pipe
must be used directly off of stove.
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
TerminationClearances
Horizontal
Overhang
Termination
Cap
VerticalWall