HearthStone 8890 User manual

DVI Ht Model 8890
Manual: 6400-40452
Revised: 10/21/09
DVI-Ht (Model 8890)
GAS-FIRED DIRECT VENT
FIREPLACE INSERT
READ THIS OWNER’S MANUAL
Operate and maintain this gas heater
according to instructions in this manual.
Read this manual in its entirety
FOR YOUR SAFETY: Do not store or use gasoline
or other flammable vapors and liquids in the vicinity of
this or any other appliance.
POUR VOTRE SÉCURITÉ: 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.
FOR YOUR SAFETY: What To Do If You Smell
Gas:
•Do not touch electrical switches.
•Do not try to light any appliance.
•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.
POUR VOTRE SÉCURITÉ: 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.
Evacuez la pièce, le bâtiment ou la zone.
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.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult a
qualified, service agency, or the gas supplier. 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: Une installation, un réglage, une
modification, un entretien ou une maintenance
incorrects peuvent entrâiner des dommages
matériels, des lésions corporelles ou la perte de vies
humaines. Consulter le manuel des usagers fourn
avec ce générateur d’air chaud.

OWNER’S MANUAL DVI-Ht Model # 8890
Page 2 of 32

OWNER’S MANUAL DVI-Ht Model # 8890
Page 3 of 32
INFORMATION SHEET
Record all relevant information concerning the purchase, installation, and maintenance of your Gas-
Fired Direct Vent Insert. 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 DVI -Ht heater. Retain this manual for future
reference.
Service Record
Date Who Performed Work Performed Notes
_/__/__
_/__/__
_/__/__
_/__/__
_/__/__
_/__/__
_/__/__

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 4 of 32
TABLE OF CONTENTS
INTRODUCTION.....................................................................................................................................................5
CODES....................................................................................................................................................................5
SAFETY INFORMATION........................................................................................................................................6
SPECIFICATIONS..................................................................................................................................................8
UNPACKING...........................................................................................................................................................9
CLEARANCES TO COMBUSTIBLES .................................................................................................................10
VENTING COMPONENTS & CONFIGURATION ................................................................................................12
Restrictor Disc ...................................................................................................................................................12
Venting System Installation ...............................................................................................................................13
ELECTRICAL CONNECTIONS............................................................................................................................14
Wiring Instructions.............................................................................................................................................14
GAS SUPPLY AND CONNECTIONS...................................................................................................................16
ASSEMBLING AND INSTALLING THE UNIT.....................................................................................................18
Log Placement within the Unit...........................................................................................................................18
Log Set Removal...............................................................................................................................................18
Surround and Façade Installation......................................................................................................................18
Installing the Unit...............................................................................................................................................18
LIGHTING THE UNIT FOR THE FIRST TIME......................................................................................................20
Smoke and Fumes Warning..............................................................................................................................20
Odors and Impurities .........................................................................................................................................20
Pilot Light Warning.............................................................................................................................................20
Prepare for Lighting...........................................................................................................................................20
Initial Adjustments..............................................................................................................................................20
Lighting Instructions...........................................................................................................................................20
Turning Off the Unit ...........................................................................................................................................21
PILOT AND BURNER FLAMES...........................................................................................................................22
MAINTENANCE AND CARE................................................................................................................................23
Cleaning.............................................................................................................................................................23
Cleaning the Glass ............................................................................................................................................23
PARTS LIST..........................................................................................................................................................24
TROUBLESHOOTING..........................................................................................................................................26
SAFETY LABEL ...................................................................................................................................................29
LIMITED WARRANTIES.......................................................................................................................................30

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 5 of 32
INTRODUCTION
Congratulations on the purchase of your
Hearthstone Gas-Fired Direct Vent Insert. The DVI-
Ht incorporates the latest in energy and gas
technology, which will provide you with clean,
efficient heat for years to come. The combination of
elegant cast iron and durable steel construction
gives the DVI-Ht attractive looks and allows for years
of durable performance, which can be maintained
with minimal care.
If there are any questions regarding installation or
operation, which are not answered within this
manual, contact your local dealer or your building
inspector.
Your DVI -Ht is equipped with a standing pilot which:
1. Generates a millivolt signal that powers the
control circuit and;
2. Ignites the main burner when the switch or
thermostat calls for heat.
This unit is equipped with a variable output control
located on the gas control valve. The DVI-Ht also
has a built in gas shut-off systems directly out of the
valve. It allows you to vary the heat output, along
with the flame height, to suit personal taste. Heat
output can be reduced during the Fall and Spring
(when the need for heat is reduced) and increased
during Winter months (when the need for heat is the
greatest). Regardless of how you set the variable
output control, the on/off cycling of the unit is always
controlled by the on/off switch or the optional wall-
mounted thermostat. Also available through your
local Hearthstone dealer is an optional front door
screen (Kit #98-69700) which enhances the realistic
flame.
The unit is also equipped with a variable speed fan
which turns on automatically and off independently
of the burner flames. The fan turns on when the
stove is hot and cycles off when the unit cools down.
This ensures the blower moves warm air only.
The DVI-Ht will provide you with years of economical
and convenient service. However, as with any gas
appliance, the unit must be properly installed and
maintained by a qualified service technician to
ensure safe and trouble-free operation.
READ THIS OWNER’S MANUAL
Operate and maintain this gas heater according to
instructions in this manual. Please read this manual
in its entirety, before attempting to light the unit.
CODES
Adhere to all local codes or, in their absence, the
latest edition of THE NATIONAL FUEL GAS CODE
ANSI Z223.1 (NFPA54) 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.
For mobile home installation, install per the
Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280 (U.S.) Or
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.)

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 6 of 32
SAFETY INFORMATION
Your DVI-Ht will remain appealing while
providing years of quality performance when
you follow a few simple safety precautions, and
by performing minimal maintenance.
WARNING
Ensure Installation and repair is conducted by a
qualified service technician. Have a qualified
service technician inspect the appliance before
use and at least annually. Clean more frequently
if necessary 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'utilisation
qui accompagnent l'appareil.
IMPORTANT
Please read and understand all warnings before
installing or operating this heater. Failure to
follow these instructions or improper use of this
heater will void the warranty and can cause
serious injury or death from burns, fire,
explosion and carbon monoxide poisoning. Do
not attempt to alter or modify the construction of
this heater or its components. Any alteration or
modification of construction voids the warranty
and the certification of this heater. Save this
manual for future reference.
FIRE HAZARD
Do not store or use gasoline or other flammable
vapors or liquids in the vicinity of this appliance.
Locate the DVI-Ht out of traffic and away from
furniture, draperies, clothing, and flammable
material.
NEVER BURN PAPER, WOOD, OR
OTHER MATERIALS
This gas heater is designed to burn either natural
gas (NG) or liquid propane (LP). Never burn any
fuel which was not intended for use in this unit.
The installation must conform with local codes or, in
the absence of local codes, the current National Fuel
Gas Code, ANSI Z223.1 (NFPA 54).
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, which
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’leu.)
During the first few hours of operation the appliance
may produce a slight smoke and/or odor. This is
normal during the first several burns. During the
initial burn, open a window(s) to assist in the
removal of the smoke/odor. If the logs appear to
smoke, turn the heater off and call a qualified
service technician.
Disconnect the appliance and its individual shutoff
valve from the gas supply piping system during any
pressure testing of that system at test pressures in
excess of 1/2 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 1/2 psig (3.5
kPa).
TEK LOG SAFETY INFORMATION
If the decorative TEK log material supplied with the
DVI-Ht 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 TEK logs with unapproved TEK logs or
any other material. Always wear gloves and
safety goggles while handling the ember bed and
log set
SHOCK HAZARD
This appliance is equipped with a three-prong
(grounding) plug for protection against shock
hazard. Use only in a properly grounded three-prong
receptacle. Do not cut or remove the grounding
prong from the plug.
WARNING
Do not connect this gas appliance to a chimney
flue serving a separate solid-fuel burning
appliance.
SERVICE CAUTION
If you believe your DVI-Ht is not, in any way,
performing properly, immediately discontinue
operation until the unit is inspected and approved by

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 7 of 32
qualified service personnel. Prior to servicing the
unit, turn the valve control knob clockwise to “OFF”.
Ensure the unit is cool prior to servicing and
cleaning. Replace any 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.
DO NOT LIGHT PILOT OR MAIN
BURNERS BY HAND
The standing pilot light equipped with this gas heater
is lit by using a battery operated spark generator, as
described in the How To Turn the Unit On & Off
section of this manual. Never attempt to light the
pilot or main burners by hand (with a match or
lighter). After repeated attempts, if the pilot light fails
to light, discontinue operation; turn off the gas at the
gas control valve, and immediately contact qualified
service personnel for assistance.
HOT SURFACES
Certain exposed surfaces of the DVI-Ht will reach
high temperatures during normal operation.
Maintain clearances to combustibles as specified in
the Clearances To Combustibles section of this
manual. Due to high temperatures the appliance
locate it out of traffic and away from furniture,
draperies, clothing and flammable materials. Alert
children and adults to the hazards of high surface
temperatures, and to the need to stay away to avoid
burns to skin or clothing ignition. Supervise young
children carefully when they are in the same room
as the appliance. Do not place clothing or other
flammable material 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 the unit on a regular basis to prevent the
accumulation of dust and lint.
ALWAYS VENT TO THE OUTSIDE
Never vent the gas heater to other rooms or
buildings. Do not burn the gas heater with the front
open. Do not burn gas heater with broken glass.
Only open front for routine service. Do not slam or
strike glass.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 8 of 32
SPECIFICATIONS
Listed:
Direct Vent Gas Fireplace
Model:
DVI-Ht Room Heater
Testing Agency:
Intertek Testing Services NA Inc. (ITS)
Tested to:
ANSI Z21.88-05 and CSA 2.33-05
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts 02202
This installation must conform with local codes or, in
the absence 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
CAUTION: REPLACE ANY SCREENS OR
SAFETY GUARDS REMOVED FOR SERVICE
WORK PRIOR TO OPERATING THIS
APPLIANCE!
Specification Natural Gas LP
Input rating (Btu/hr) 33,000 33,000
Maximum output (BTU/hr) 26,900 26,200
Minimum input rating (Btu/hr) 13,000 12,000
Orifice size DMS 43,52 55,62
Man. pressure-HI setting (in. w.c./kPa) 3.5/1.15 10.0/0.8
Man. Pressure-Lo setting (in.w.c./kPa) 1.2/0.3 3.3/1.59
Inlet pressure-MAX (in. W.c./kPa) 10.5/2.6 14.0/3.47
Inlet pressure-MIN (in. W.c./kPa) 5.0/1.24 11.0/2.88
Conditionally approved for purchased mobile home
installation. This appliance may be installed in an
aftermarket permanently located, manufactured
(mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases, unless a
qualified Hearthstone kit is used.
Cet appareil peut être installé dans un after market
situé définitivement, fabriqué (mobile) logement, où
ne prohibé pas par des codes ocaux.
Cet appareil est seulement pour l’emploi avec le type
de gaz indiqué sur l’assiette d’évaluation. Cet
appareil n’est pas décapotable pour l’emploi avec
autres gaz, à moins qu’un équipement certifié est
employé.
Figure 1: Firebox Dimensions

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 9 of 32
UNPACKING
Inspect for Damage
The DVI-Ht is packaged by the manufacturer to
withstand shipment without damage under most
circumstances. However, damage can occur during
transit and handling. Care should be taken when
unpacking, inspecting for damage, and installing the
unit. If any damaged or missing parts are
detected, immediately contact your dealer.
A complete DVI-Ht is shipped with three packages.
Locate and remove these packages. Package #1 will
contain the Log Set. Package #2 will contain the
front set, doors, and grills. Package #3 will contain
the optional surround if ordered. Lift the stove off the
pallet and partially insert it into the fireplace, (with
regards to the Clearances To Combustibles section
on page 10 of this manual). Carefully remove the
surround set and front set from the packaging
carton.
Inspect the DVI-Ht for visible and/or concealed
damage. The unit should appear to be square and
true. The sheet metal parts should be smooth and
free of bends and/or dents. If the facade is
enameled, the enameled cast iron should be free of
chips and/or cracks. If visible or concealed damage
is found or suspected, contact your local dealer for
instructions. To open the firebox, reach over the
firebox, and under the front grill. With a flat
screwdriver turn the retaining clips up. There will be
four separate clips. Be careful, when you lift the last
one, as it will free the glass and frame from the unit.
Pull the top of the glass towards your body, and lift
the glass and frame up and away from the unit.
Carefully set the glass and frame away from the unit,
as it will need to be installed later. Inspect the log set
for damage. It is important to wear safety goggles
and gloves when handling the log set. If a damaged
log is encountered, contact your local dealer for a
replacement log. Put the log set, aside. It will be
installed later.
Install “AA” battery in the pilot igniter box under
the gas component tray before trying to light the
unit.
Components
1-DVI -Ht (with accessory box)
4 Decorative logs
1 Pilot shield
1 Bag of Embers
1 Bag of Platinum Bright Embers
40’ Wire
1 Thermostat
1 LP Conversion Kit
1 Restrictor Disc
2 Metal Surround Flanges
Façade Assembly
•See packing list.
Surround Assembly
•See packing list
WARNING: DO NOT STRIKE, HIT OR SLAM
THE GLASS SHUT IN ANY WAY. IT MAY
CAUSE INJURY OR DISTURB THE
PERFORMANCE OF THE APPLIANCE
Items Required for Complete Installation
of the Unit
Surround Set
Two - 3" Flex Liners (Dura-Vent #2280)
Co-Linear Chimney Liner Termination Kit (Dura-
Vent #923GK)
High Wind Termination Cap (Dura-Vent #991)
Four - 3.5" Hose Clamps
Gas Hookup Equipment/Tools
High Temperature Silicone
Small Level
Phillips Screwdriver
Slotted Screwdriver or 5/16" Nut Driver
Thread Sealant
Open End Wrenches or Adjustable Wrench
Permanent Marker
Fiberglass insulation
Safety glasses
Gloves
An external regulator (for Propane/L.P. gas only)
Gas piping which complies with local codes
Pipe sealants approved for use with
propane/L.P. Gas (resistant to sulfur
compounds)
A sediment trap
Pipe wrenches
Other parts required by local code

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 10 of 32
CLEARANCES TO COMBUSTIBLES
Due to high surface temperatures, locate the unit
away from furniture and draperies. Do not place
clothing and other flammable material on or near the
heater. Always maintain adequate clearances
around the air openings in the façade and allow for
adequate ventilation. Maintain minimum clearances
to combustibles as shown in Figure 2 and 3.
Hearth Requirements
The DVI ht requires a non-combustible hearth pad
that extends no less than 14” in front of the unit. It
must also extend 27 ½” wide, centered in front of the
glass. If the DVI ht is raised at least 4” off the
floor, no hearth pad is required.
30-5/8
*INSULATION
26-5/8
28-5/8
8" - TO ALL SIDE WALLS
13" - WITH 1" TRIM
HEARTHPAD REQUIRED 14" IN FRONT OF UNIT
15" - WITH 7.5" MANTLE
COMBUSTIBLEMANTLENOTALLOWEDBELOWTHISLINE
14
TRIM OR
MANTLE DEPTH
(INCHES)
HEIGHT
ABOVE
HEARTH
38-5/8
34-5/8
32-5/8
36-5/8
42-5/8
40-5/8
44-5/8 42
MANTLE IN
THIS AREA
10
COMBUSTIBLE
8612
(INCHES)
221816 20
NOTE: IF
THE
OPTIONAL
THRESHOLD
IS USED ADD
1.5" TO THE
MANTLE
CLEARANCES.
COMBUSTIBLES CAN NOT EXTEND
BELOW THE TOP OF THE SURROUND,
NON-COMBUSTIBLES CAN.
Clearance to combustibles are to
be measured from the air opening
Figure 2: Clearance to Combustibles (*Insulation recommended)
Error! Objects cannot be created from editing field codes.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 11 of 32
Figure 3: Surround Clearance to Combustibles

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 12 of 32
Non-combustible damper
seal:
1) Must support inlet flex pipe
2) Musr seal chimney opening around
inlet and exhaust flex pipe
Air Intake
Inlet:
Must extend through the damper seal
3" Co-Linear Flex
Extensions(exhaust must be within 10'-40')
Chimney Liner
Termination Kit (Exhaust to center connector)
Exhaust
*INSULATION
Termination Cap #991
Fireplace
Fireplace
3.5" Hose
Clamps
3" Co-Linear Flex
Extensions(10'-40')
Chimney Liner
Termination Kit
Flue
High Wind
E
XHAUST
INTAKE
VENTING COMPONENTS & CONFIGURATION
DO NOT vent The DVI-Ht jointly with any other solid
fuel or gas appliance. Vent the DVI-Ht directly to the
outside of the building using a proper termination as
listed in the following pages. Typical venting
configurations are shown in Figures 4 & 5. If the
vent-air system is disassembled for any reason,
reinstall per the instructions provided in the
Assembling the Unit section of this manual on page
18.
Restrictor Disc
Your DVI-Ht is supplied with a vent restrictor disc.
This disc will provide excellent restriction for vertical
vent runs exceeding 20 feet. If your vertical rise is
less than 20 feet, use of the restrictor is not
necessary. See Figure 6.
Figure 4: Co-linear Flex System Figure 5: Chimney Air System
Figure 6: Restrictor Disc

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 13 of 32
Venting System Installation
1. Chimney Liner System*
1. Two Sections 3" Co-Linear Flex Liners (10ft
Min./40 ft Max.). Dura-Vent #2280
2. Chimney Liner Termination Kit (Includes Co-
Linear to Co-Axial Termination and Flashing)
Dura-Vent #923GK
3. High Wind Termination Cap Dura-Vent #991
4. High Temperature Silicone
5. Four 3-1/2" Hose Clamps (all steel or stainless)
6. *Available through your local Hearthstone dealer.
WARNING! UNDER NO CIRCUMSTANCES BLOCK
THE FLOW OF COMBUSTION OR VENTING AIR.
Before You Begin
Ensure the masonry fireplace and flue complies with
the applicable codes and both are in good condition.
Repair any damage before installation of the DVI-Ht
begins. Prepare a zero clearance (metal) fireplace by
doing the following:
1. Install the label provided on the inside of the
firebox.
2. Remove the damper, grate.
3. If necessary, remove the smoke shelf,
internal baffles, screen, masonry lining and
doors. (see the Dimensions in Figure 1).
4. DO NOT remove any insulation or structural
frame members.
5. DO NOT remove or alter the metal sides,
floor, door frame, or face of the fireplace.
The gas line enters the valve on the right side of the
unit with a provided 24” flexible connector.
Installation of the Co-linear Vent Pipe
Mark each end of one of the flexible vent pipes
“intake” with a permanent marker. Mark each end of
the other flexible vent pipe “exhaust”.
•Apply the high temperature silicone on the upper
portion of the vent (flex pipes to co-linear to co-
axial adaptor). Important: Ensure the pipe
connected to the exhaust on the stove connects
to the exhaust portion of the co-linear to co-axial
adaptor. Ensure you meet all the manufacture’s
requirements when installing the adaptor and cap
assembly. Follow the manufactures instructions
when installing the same. (The exhaust pipe on
the co-linear to co-axial adaptor is the pipe that is
in the center of the adaptor.)
•Repeat this process to the top outer edge of both
the intake and exhaust collars on the back of the
unit. The exhaust adaptor is the collar nearest
the center of the unit, the intake adaptor collar is
on the right side of the stove (refer to Figure 1, on
page 7) Install the restrictor if necessary. Slide a
hose clamp over the ends of both flexible vent
pipes. Place the flexible vent pipe marked
“intake” onto the intake collar, place the flexible
vent pipe marked “exhaust” onto the exhaust
collar. Secure them to the collar adaptors by
tightening the hose clamps with a slotted
screwdriver or 5/16" nut driver.
Observe the following guidelines when installing the
vent pipes:
Do not install the venting into a chimney serving
another appliance, be it fossil fuel, solid fuel, or
another gas.
Do not crimp or rupture the vent pipes.
2. Using the existing chimney as an air
inlet
The following installation procedure is not covered
under the ANSI Z21.88 test method and product
certification. Use of an existing chimney as an air
intake must be specifically approved by your gas
supplier and the local code Authority Having
Jurisdiction.
The chimney flue must be carefully sealed from the
room environment. Fabricate a plate of non-
combustible material and carefully fit it to the damper
area with high temperature sealant (see figure 5).
NOTE: Seal all joints. Avoid leakage around the
damper seal.
WARNING: THIS INSTALLATION MAY NOT WORK
IN A NEGATIVE PRESSURE ENVIRONMENT, OR IF
A SEAL CANNOT BE ATTAINED. IF SOOTING, OR
GHOSTING OF THE FLAMES OCCURS, PLEASE
CHECK AND REPAIR LEAKAGE, OR CHIMNEY
SYSTEM.
This stove is certified for use with a coaxial
venting system. ANSI Z21.88 standards state that
the maximum leakage rate for the venting system
is 32 SCFM @ .06” w.c. This leakage must be
accounted for if you use the chimney for intake
air.
CAUTION: A REVERSE FLUE CONDITION CAN
OCCUR IF THE VENTING IS NOT ATTACHED
CORRECTLY, OR IF THE UNIT IS LIT BEFORE THE
GLASS FRONT IS SECURED. A REVERSE FLUE
CONDITION CAN DAMAGE THE UNIT.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 14 of 32
ELECTRICAL CONNECTIONS
Install the “AA” battery in the pilot igniter box
under the gas component tray before attempting
to light the unit.
NOTE: OPEN VALVE DOOR ON THE CENTER
BOTTOM OF THE FRONT FOR ACCESS TO
ELECTRICAL AND GAS CONNECTIONS
Electrical Grounding Instructions
This appliance is equipped with a three-prong
(grounding) plug for your protection against shock
hazard. Use only a properly grounded three-prong
receptacle. Do not cut or remove the grounding
prong from this plug. Place the receptacle to the
right of, or behind the unit.
Switch Plate
The DVI-Ht comes pre-wired to the control switches.
To install, use the two 10-24 x ½” screws to mount
the plate to the left surround panel. The plate will fit
in the recessed side of the surround.
Thermostat
The fireplace insert is operated by the
on/off/thermostat switch. You can control the DVI-Ht
automatically with the provided wall mounted
thermostat. We recommend installation of the
thermostat for a more comfortable, automatic
performance; however you can 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. The thermostat comes
with 40' (12m) of thermostat wire.
Thermostat Wiring
The thermostat wire from the unit to the thermostat
can be surface mounted, routed under the floor, or
through walls, etc. Connect the thermostat to the
unit using no more than the 40' (12 m) of insulated
thermostat wire provided. Ensure you leave a small
coil of wire behind the unit so that it can be moved
out of position for servicing and cleaning.
Thermostat Placement
Place the thermostat in the same room or living
space as the unit. Typically 5' (1.5 m) 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 over, or too close to the unit, otherwise heat
from the unit will immediately satisfy the thermostat
and turn the unit off.
Wiring Instructions
The valve post connections are found by opening
the bottom center grill on the front of the unit. Also,
refer to Figure 8 when making these connections;
position the thermostat wire so it extends out the
side surround panel towards the thermostat. (At the
thermostat, connect the wires to the two connection
screws on the back of the thermostat per the
instructions received with the thermostat. Take care
not to over-tighten the connection screws and not to
damage the internal parts of the thermostat. Now
attach the wires in their proper location on the
firebox.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 15 of 32
Wiring Diagram - DVI ht
Bk
W
Y
V
G
Wiring Color KEY:
R
B
G
W
are shown on opposite side.
NOTE: Numbers on switch
B
Bk
V
W
R
213 12
V
Y
Bk
Y
3
Bk Bk
W
Bk
Bk
Bk
Bk
Figure 4: Wiring Diagram

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 16 of 32
GAS SUPPLY AND CONNECTIONS
NOTICE: A qualified technician must connect
the heater to the gas supply and leak test the
unit before it is approved for use. Consult all
local codes.
WARNING: THE UNIT MUST BE INSTALLED AND
CONNECTED IN ACCORDANCE WITH LOCAL
CODES, OR IN THE ABSENCE OF LOCAL CODES,
WITH THE MOST CURRENT EDITION OF THE
NATIONAL FUEL GAS CODE ANSI Z223.1.
We recommend using new black iron or steel pipe
only. Internally tinned copper tubing can be used in
some areas when permitted by local codes. Only
use pipe of sufficient diameter to allow full gas
volume to heater, without undue loss of pressure.
Excessive pressure loss will occur if the pipe is too
small.
The gas supply line must include a manual shut-off
valve and union so the unit can be disconnected for
servicing. Also a sediment trap and a 1/8" N.P.T.
plugged tapping must be installed upstream of the
heater. The sediment trap is installed to prevent
moisture and contaminants from passing through the
pipe to the heater controls and burners. Failure to
install a sediment trap could prevent the heater from
operating reliably. The 1/8" N.P.T. plugged tapping
is installed for the test gauge connection
(immediately upstream of the gas supply
connection). Damage to the valve caused by lack of
a sediment trap will not be covered by the warranty.
It is mandatory to install a sediment trap on all
installations
We have supplied a 36" flexible stainless steel gas
line for installation convenience and to avoid undue
mechanical load on the valve. We recommend
using the flexible line, but also refer to local code.
The gas supply line connection is made to the
flexible line in the lower rear right portion of the DVI-
Ht. Apply a thread sealant to both male ends on the
flexible gas line. Thread one end directly into the
valve and the other to a 3/8" connector on the gas
line.
CAUTION: CHECK GAS TYPE! THIS UNIT IS
SUPPLIED AS NG ONLY. A LP CONVERSION IS
ALSO SUPPLIED. A QUALIFIED TECHNICIAN
MUST DO THE CONVERSION. THE GAS SUPPLY
MUST BE THE SAME AS STATED ON THE
HEATER’S RATING PLATE (LOCATED ON THE
UNIT). IF THE GAS SUPPLY IS DIFFERENT, DO
NOT INSTALL THE HEATER. CONTACT YOUR
DEALER FOR THE CORRECT MODEL OR
CONVERSION KIT.
GAS PRESSURE ADJUSTMENT: A QUALIFIED
TECHNICIAN MUST PERFORM THIS
PROCEDURE!
The supply line pressure is tested, to ensure it meets
minimum pressure requirements, as listed in the
Specifications sections of this manual, for the type of
fuel in use (NG or LP). The unit 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 1/2 psig. During
tests in excess of 1/2 psig. (14" w.c.), the heater
must be disconnected from the gas supply system.
Test by connecting a manometer to the supply line.
Adjust the incoming pressure, if necessary, to meet
the required supply line pressure. Once connected
to the gas supply, the gas inlet pressure and
manifold gas pressure must be tested. The gas inlet
tap (6) and manifold pressure tap (7) is located on
the control valve (see Figure 8). Connect a
manometer to the test points on the gas control
valve; refer to #’s 6 & 7 of Figure 8 for locations.
NOTE: For installations from 610-1370 meters (2000-4500
ft.), the orifice sizes (DMS) for natural gas are 44,52 and
for propane gas are 56 and 62 . (Cet appareil est equipé
pour des altitudes compries entre et 2000-4500 pieds
(610-1370m) seulement.) See data plate for additional
information. For high altitude installations consult the local
gas distributor or the authority having jurisdiction for
proper rating methods. If the unit must be adjusted, the
information sticker (provided with the high altitude kit)
must be filled out completely and mounted to the unit per
the instructions provided with the kit.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 17 of 32
Figure 5

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 18 of 32
ASSEMBLING AND INSTALLING THE UNIT
Log Placement within the Unit
Figure 9: Log Placement
Fragile! Handle logs with care. Always wear gloves
and safety goggles while handling the log set.
1) To open the firebox, reach over the firebox, and
under the front grill. With a flat screwdriver pry
the retaining clips up. There will be four separate
clips. Be careful, when you lift the last one, as it
will free the glass and frame from the unit. Place
the glass and frame in a safe place.
2) Install the left and right ember filler pieces.
Refer to figure below.
3) Spread the charcoal embers over the gaps
between the ember bed and the filler pieces.
These embers are intended to cover the seam
between the two. (These embers will not glow
when the unit is turned on) See figure below.
4) Install the four main logs as shown in the figure
below. Spread the Platinum Bright Embers over
the logs and burner.
Leave embers off the pilot to allow the pilot
flame to ignite the ignition ports on the burner
tube.
5) Replace the glass and frame.
Log Set Removal
To remove the log set, follow the “Log Placement
Within the Unit” instructions in the reverse order on
page 16.
Surround and Façade Installation
See instructions included with assemblies.
Installing the Unit
1. Place a level on top of the unit. Leg leveling
bolts are located in the front and rear of the
base plate. Adjust the rear leveling bolts
now as they will not be accessible once the
unit is fully inserted into the fireplace.
Left filler Right filler
Left log
Front twig
Right log
Pilot covering log

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 19 of 32
2. Push the unit as far into the fireplace as you
can, leaving just enough room for the fan
power cord to exit on the bottom left or right
side, between the surround and fireplace.
3. Before replacing the front cast, carefully
unwrap and place the log set into the unit.
Refer to the Log Placement section of this
manual, on page 18 for the precise
positioning of the log.
Pull-Out Gas Service Tray
To ease in the installation and service of the DVI-Ht
the unit is equipped with a pullout tray under the
viewing flame, to ensure proper access to the valve,
pilot connections, and igniter battery compartment.
To pull out the tray simply unscrew the two 8-32
screws on either sides of the control knobs. Once
these are removed, pull the tray by the two tabs the
screws were located on. Once the service work is
complete, push the tray back to its original position
and replace the screws.
A built in gas shut-off valve is installed on the unit
directly off of the valve. In the event of a gas leak
shut the gas off at this point first, and then follow the
instructions on the cover of this manual
Figure 10: Gas Service Tray (pulled out position)
Installing the Glass and Frame
1. Set the bottom of the glass frame into the
two grooves on the bottom of the firebox.
2. Push the top of the glass/frame into the
firebox.
3. Pull the 4 retaining clips down, securing the
glass into the firebox seal.
4. Attach the front cast to the firebox by setting
the two knobs into the receiving holes on the
firebox. Center the front and push the top in
until it “clicks” shut.
Place a level on the top of the unit. Two leveling leg
bolts are located in the front of the base plate. Use
a wrench to turn these bolts up or down as
necessary to level the unit. Note, leveling bolts are
also located in the back of the base, but the insert
must be pulled out of the fireplace to gain access to
them.

OWNER’S MANUAL Model # 8890 DVI-Ht
Page 20 of 32
LIGHTING THE UNIT FOR THE FIRST TIME
CAUTION: LIGHTING THE DVI-HT FOR THE FIRST
TIME AND ADJUSTMENTS TO THE UNIT SHOULD
BE PERFORMED BY QUALIFIED SERVICE
PERSONNEL.
Smoke and Fumes Warning
When lit for the first time, the unit will emit some
smoke and fumes. This is normal “off-gassing” of
the paints and oils used in the manufacturing and
assembly of the unit. Open windows to vent the
room if necessary. The off-gassing and fumes will
usually subside after the first 10 to 20 minutes of
operation.
Odors and Impurities
A heater of this type may produce odors during
heater operation due to impurities that may exist in
the immediate area. Sources of impurities can be
cleaning solvents, paint solvents, cigarettes, smoke,
pet hair, dust, adhesives, new carpet, and/or textiles.
Such odors will dissipate. However, opening a
window or otherwise providing additional ventilation
to the area can alleviate the condition. If any odor
persists, contact your dealer or an authorized
service technician.
Pilot Light Warning
The DVI-Ht has an electric spark igniter, which
ignites the pilot light by means of a spark at the pilot
light assembly. Do not attempt to light the unit with a
match or by any means other than the electric spark
igniter
Prepare for Lighting
Prepare for the lighting procedure by adjusting the
thermostat to its lowest setting or OFF position. If the
gas control knob is not in the OFF position, turn the
knob fully clockwise to OFF. Locate the variable
output control knob and turn it fully counter-
clockwise to the highest setting.
Initial Adjustments
Once the DVI-Ht has been set in place, connected
and assembled as described in the Assembly of the
Unit, Electrical Connections, and Gas Supply &
Connections sections of this manual, the unit is
ready to be lit for the first time. Each unit is tested
prior to shipment by the manufacturer, so ignition
should take place without failure. However, a
number of small adjustments may be necessary to
compensate for variations in gas pressure, altitude,
and other factors particular to each installation.
Prior to lighting the unit for the first time, wait 5
minutes to allow any residual gas within the unit to
dissipate. 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 do not smell gas after this five-
minute period, proceed with the lighting procedure.
If you do smell gas, do not proceed with the lighting
procedure. Instead, immediately refer to the What
to Do If You Smell Gas Warning, on the cover of
this manual.
Lighting Instructions
The gas control knobs are located behind the valve
door at the bottom of the unit.
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.)
1. 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.
2. 5. Turn gas control knob counterclockwise to
“PILOT”.
3. 6. Push in control knob all the way and hold
in.(You should hear the clicking of the Piezo
igniter 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.
4. 7. Turn gas control knob counterclockwise to
“ON”.
8. Select “ON” or “T-STAT” position on the on/off/t-
stat switch.
5. 9. Plug in the blower.
10. Set thermostat to “ON” and set the desired
temperature setting.