Dovre SAPPHIRE DV450S User manual

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 fuel
indicated on the Rating Plate. This appliance is not
convertible for use with other gases, unless a certi-
fied Conversion Kit is used.
WARNING!
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause injury or property
damage. Refer to this manual. For assistance or
additional information, consult a qualified installer ,
service agency or the gas supplier.
FOR YOUR SAFETY
The appliance area must be kept clear and free from com-
bustible materials, gasoline and other flammable vapors and
liquids.
-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 any electrical switch.
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
-Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
WARNING!
If the information in this manual is not followed exact-
ly, a fire or explosion may result causing property dam-
age, personal injury or loss of life.
This manual must be used for installation of the DV450S Direct Vent Heater and retained by the homeowner for operating and
maintenance instructions. This heater may be installed with a vertical or horizontal direct vent terminator system.
SAPPHIRE DV450S
DIRECT VENT ROOM HEATER
OWNER’S MANUAL
AND INSTALLATION INSTRUCTIONS
O-T L
Tested and
Listed by
Beaverton
Oregon USA
OMNI-Test Laboratories, Inc.
C
1445 North HIghway
Colville, WA 99114
A Division of Hearth Technologies Inc. [email protected]
ahpfireup.com
#29863C 12/2000
Shown here with optional accessories (door trim and
warming shelf).

01-01 Page 2 29863C
DV450S DIRECT VENT ROOM HEATER
Serial/Rating Label (Listings and Code Approvals) ...........3
Listing & Code Approvals ..................................................4
Installer Information...........................................................4
Description of Heater....................................................... 5
Heater System Components .......................................... 5
Dimensions...................................................................... 6
Clearances to Combustibles..............................................6
Venting Components .........................................................7
Termination Examples .......................................................8
INSTALLATION:
A. Horizontal Termination................................................ 9
B. Vertical Termination ...................................................12
C. Existing Masonry Chimney Installation ......................14
D. Existing Class A Metal Chimney ................................15
Gas Line Installation........................................................16
Gas Pressure...................................................................16
Fuel Conversion ..............................................................16
High Altitude Installation..................................................17
Optional Accessories.......................................................18
Thermostat Wiring Diagram.............................................19
1. PLEASE READ THESE INSTALLATION INSTRUCTIONS COMPLETELY BEFORE BEGINNING INSTALLATION PROCEDURES.
FAILURE TO FOLLOW THEM COULD CAUSE AN APPLIANCE MALFUNCTION RESULTING IN SERIOUS INJURY AND/OR
PROPERTY DAMAGE.
2. DUE TO HIGH TEMPERATURES THE APPLIANCE SHOULD BE LOCATED OUT OF TRAFFIC AND AWAY FROM FURNITURE
AND DRAPERIES.
3. CHILDREN AND ADULTS SHOULD BE ALERTED TO THE HAZARDS OF HIGH SURFACE TEMPERATURES AND SHOULD STAY
AWAY TO AVOID BURNS OR CLOTHING IGNITION.
4. YOUNG CHILDREN SHOULD BE CAREFULLY SUPERVISED WHEN THEY ARE IN THE SAME ROOM AS THE APPLIANCE.
5. CLOTHING OR OTHER FLAMMABLE MATERIAL SHOULD NOT BE PLACED ON OR NEAR THE APPLIANCE.
6. ANY SAFETY SCREEN OR GUARD REMOVED FOR SERVICING AN APPLIANCE MUST BE REPLACED PRIOR TO OPERATING
THE APPLIANCE.
7. WARNING: DO NOT OPERATE APPLIANCE WITH THE PANEL(S) REMOVED, CRACKED OR BROKEN. REPLACEMENT OF
THE PANEL(S) SHOULD BE DONE BY A LICENSED OR QUALIFIED SERVICE PERSON.
8. INSTALLATION AND REPAIR SHOULD BE DONE BY A QUALIFIED SERVICE PERSON. THE APPLIANCE SHOULD BE
INSPECTED BEFORE USE AND AT LEAST ANNUALLY BY A QUALIFIED SERVICE PERSON. 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 PASSAGEWAYS OF THE APPLIANCE BE KEPT CLEAN.
9. ENSURE THAT THE FLOW OF COMBUSTION AND VENTILATION AIR NOT BE OBSTRUCTED.
10. ENSURE THAT ADEQUATE COMBUSTION AND VENTILATION AIR ARE PROVIDED.
PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE.
Safety Precautions
NOTE: Illustrations throughout these instructions reflect typical installations and are for design purposes only. Actual
installation may vary slightly due to individual design preferences. However, minimum and maximum clearances
must be maintained at all times.
The illustrations and diagrams used throughout these installation instructions are not drawn to scale.
FIREBOX ENTRY
Removing Front Face ......................................................20
Removing Glass ..............................................................20
Log Placement.................................................................20
Creating Coal Bed Look ..................................................20
Adjustable Flue Restrictor ...............................................21
Reinstallation of Glass.....................................................21
DoorTrim Kit Installation...................................................21
Replacing Front Face ......................................................21
Pre-Use Check ................................................................21
Lighting Instructions ........................................................22
Air Shutter Adjustment.....................................................23
Seasonal Shutdown.........................................................23
Operation & Shutdown During Regular Use....................23
Maintenance....................................................................24
Trouble Shooting..............................................................25
Replacement Parts..........................................................28
Warranty ..........................................................................30
Owner's Notes .................................................................31
Table of Contents

DV450S DIRECT VENT ROOM HEATER
01-01 Page 3 29863C
SERIAL/RATING LABEL
DO NOT REMOVE THIS LABEL /
NE PAS ENLEVER L’ÉTIQUETTE
Made in U.S.A. /
Fait Aux États-Unis
Date of Manufacture / Date du Manufacturier
Keep burner and control compartment clean. See installation and operating instructions accompanying
this appliance. Gardez le brûleur et le compartiment de contrôle propres. Vérifiez les instructions d’installation et
d’opération qui accompagnent cet appareil.
This vented gas fireplace heater is not for use with air filters. / Cet appareil de chauffage au gaz n’est pas pour l’usage avec des filtres d’air.
2001 2002 2003 Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecJan
MODEL / MODELE: DV450 VENTED GAS FIREPLACE HEATER
FOURNAISE AU GAZ AVEC VENTILATION
NOT FOR USE WITH SOLID FUEL / NE PAS UTILISER AVEC LE COMBUSTIBLE SOLIDE
SERIAL NO.
A Division of Hearth Technologies Inc.
1445 North Highway Colville,
WA 99114
O-T L
Tested and
Listed by
Beaverton
Oregon USA
OMNI-Test Laboratories, Inc.
C
Report No. / Rapport Numero
061-S-24-5
For use with Natural Gas For use with Propane Usage Au Gaz Naturel Usage Au Gaz Propane 0-4500’ 0-4500’
Input Rate on “HI” (BTU/Hr) 40,000 38,000 Puissance Évaluée à “HI” (BTU/Hr) Input Rate on “LO” (BTU/Hr) 29,000 25,000 Puissance Évaluée à “LO” (BTU/Hr) Maximum Output (BTU/Hr) 28,800 27,740 Puissance Maximum (BTU/Hr) Main Burner Orifice .125/3.18 DIA./mm .073/1.85 DIA./mm
Orifice du Brûleur Principal
Minimum Inlet Pressure (Inches W.C.) 4.5” 11” Pression Minimum de la Valve (pouces W.C.)
Maximum Inlet Pressure (Inches W.C.) 7.0” 14”
Pression Maximum de la Valve (pouces W.C.)
Manifold Pressure on “HI” (Inches W.C.) 3.5” 10”
Pression du Collecteur d’ Échappement à “HI” (pouces W.C.)
This appliance equipped for altitudes 0-2000’ (0-610m) in USA; and in Canada for altitudes of 0-
4500’ (0-1370m). In USA for Altitudes above 2000’, the vent configuration, orifice, or combination of
both may need to be changed. See Owner’s Manual for information on making these changes.
Cet appareil est équipé pour les altitudes de 0-2000’ (0-610m) aux États-Unis; et au Canada pour
les altitudes de 0-4500’ (0-1370m). Pour les altitudes au dessus de 2000’ aux États-Unis, la
configuration du ventilateur, son orifice ou les deux peuvent possiblement avoir à être changé. Voyez le manuel du propriétaire pour les informations sur ces changements. This appliance must be installed in accordance with local codes, if any; if none, follow ANSI Z223.1 in USA, CAN 1-B149 in Canada.
ELECTRICAL SUPPLY / FOURNITURE ÉLECTRIQUE: 120 Volts, 1.2 Amps, 60 Hz
APPROVED FOR CANADA AND USA TO:
ANSI Z21.88b-1999 / CSA 2.33b-M99 Vented Gas Fireplace Heaters, and applicable sections of UL307b Gas Burning
Heating Appliances for Manufactured Homes and Recreational Vehicles, CAN/CGA 2.17-M91 “Gas Fired Appliances for use at High Altitudes.” This appliance is manufactured for operation with Natural Gas. For conversion to propane Manufacturer’s Part #844-9230 and instructions must be used. This appliance may be installed in a bedroom or bedsitting room; in Canada remote thermostat installation is required.
APPROUVÉ POUR LE CANADA ET LES ÉTATS-UNIS: ANSI Z21.88b-1999 / CSA 2.33b-M99 Fournaises au Gaz avec Ventilation, et les sections applicables de UL 307b
Appareils de Chauffage Au Gaz pour les Maisons Mobiles et les Véhicules Motorisés, CAN/CGA 2.17-M91 “Gas Fired
Appliances for use at High Altitudes”. Cet appareil est manufacturé pour l’opération avec le Gaz Naturel.
Pour une conversion au gaz propane les pièces du Manufacturier #844-9230 et ses instructions doivent être
utilisées.
Cet appareil peut être utilisé dans une chambre à coucher ou salle de séjour; au Canada, l’installation d’un thermostat à distance est exigée.
HEARTH: A non-combustible hearth pad is not required. However, the floor beneath the stove must be stable, level, and strong enough to support the stove without a tipping hazard. Foyer: Un coussinet non-combustible
de foyer n’est pas exigé. Cependant, le plancher en dessous du poêle doit être droit, à niveau et assez fort
pour supporter le poêle sans le hasard de basculer.
FAN TYPE VENTED CIRCULATOR / VENTILATEUR CIRCULATOIRE
Blower Electrical Rating / Évaluation du Ventilateur Électrique: 115 V., 1.5 Amps, 60 Hz, 150 Watts
Thermal Efficiency / Efficacité Thermique* 72% NG
A. Sides of stove to wall 9" (229 mm)
Du coté du poêle au coté du mur
B. Back of stove to wall 6" (152 mm)
Le contrôle arrière au mur arrière
C. Corner of stove to side wall 4" (102 mm)
Du Coin du poêle du mur
D. Top of stove to ceiling 42" (1829 mm)
du dessus de poele au plafond
E.Max. Alcove Depth 48" (1219 mm)
Profondeur maximale de l'alcôve
MINIMUM CLEARANCES TO COMBUSTIBLES / ESPACE MINIMUM AUX COMBUSTIBLES
Minimum clearances required from combustible construction for all appliance surfaces. /
Espaces minimum exigés de la construction combustible aux surfaces de l’appareil.
This appliance is only for use with the type of gas indicated on the rating plate and may be installed in an aftermarket, permanently located, manufactured (mobile) home where not
prohibited by local codes. See owner's manual for details. This appliance is not convertible
for use with other gases, unless a certified kit is used.
Cet appareil doit etre utilise uniquement avec le type de gaz indique sur la plaque signaletique et peut etre installe dans une maison prefabriquee (mobile) installee a demeure si les reglements locaux le permettent. Voir la notice du proprietaire pour plus de details. Cet appareil ne peut etre converti a d'autres gaz sauf si une trousse de conversion certifiee est
utilisee. This appliance must be properly connected to a venting system in accordance with the
manufacturer's installation instructions. If venting is disconnected for any reason, the vent-air
intake system must be properly resealed and reinstalled.
Cet appareil doit ê correctement raccordé á un système d'évacuation, conformément aux
instructions du fabricant.
AA
B
C
CD
E
250-5891

01-01 Page 4 29863C
DV450S DIRECT VENT ROOM HEATER
WARNING:
BEFORE STARTING, DO THE FOLLOWING:
1. WEAR GLOVES AND SAFETY GLASSES FOR
PROTECTION.
2. KEEP HAND TOOLS IN GOOD CONDITION.
SHARPEN CUTTING EDGES AND MAKE
SURE TOOL HANDLES ARE SECURE.
3. ALWAYS MAINTAIN THE MINIMUM AIR SPACE
REQUIRED TO THE ENCLOSURE TO
PREVENT FIRE.
INSTALLATION AND REPAIR SHOULD BE DONE
BY A QUALIFIED SERVICE PERSON. THE HEATER
SHOULD BE INSPECTED BEFORE USE AND AT
LEAST ANNUALLY BY A QUALIFIED SERVICE
PERSON. 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 PASSAGEWAYS
OF THE HEATER BE KEPT CLEAN.
Tools and building supplies normal-
ly required for installation:
Saw
Pliers
Phillips Screwdriver
Tape Measure
Plumb Line
Level
Electrical Drill and Bits
Square
High Temperature Sealant Material*
*High Temperature Sealant Material. Sealants that will
withstand high temperatures; General Electric RTV103
(Black), or equivalent. Rutland, Inc. Fireplace Mortar #63,
or equivalent; Dow Corning 732 or equivalent.
LISTING & CODE APPROVALS
U.S. CERTIFICATION
The DV450S Series Room HEater has been tested in accordance
with the ANSI standard Z21.88 1998 and UL307B and has
been listed by OMNI-Test Labs for installation and operation as
described in these installation and operation instructions. All
components are A.G.A. or UL safety certified.
Canada Certification
The DV450S Series Room HEater has been tested in accordance
with CSA 2.33-M98 and has been listed by OMNI-Test Labs for
installation and operation as described in these installation and
operating instructions. All components are C.G. A. or C.S.A.
safety certified.
Local Codes
This installatin must conform with local codes or, in the absence
of local codes, with theNational Fuel Gas Code, ANSI Z223.1-
latest edition, in the U.S.A. and the CAN/CGA B149-latest edition,
in Canada.
Efficiency
The efficiency rating of the appliance is a product thermal
efficiency rating determined under continuous operating
conditions and was determined independently of any installed
system.
INSTALLER INFORMATION
This Heater is approved for installation in bedrooms and
mobile homes in the United States and Canada.
Efficiency
The efficiency rating of the appliance is a product thermal effi-
ciency rating determined under continuous operating conditions
and was determined independently of any installed system.

DV450S DIRECT VENT ROOM HEATER
01-01 Page 5 29863C
VENT
SECTION
VENT
SECTION
VENT
SECTION
90û ELBOW
ROUND
SUPPORT
BOX/WALL
THIMBLE
HORIZONTAL
TERMINATION
CAP
VERTICAL
TERMINATION
CAP
STORM
COLLAR
VERTICAL
TERM.
ADAPTER
FLASHING
FIRESTOP
SPACER
ROUND
SUPPORT
BOX/WALL
THIMBLE
CATHEDRAL
CEILING
SUPPORT
BOX
HEATER SYSTEM COMPONENTS
Catalog # DESCRIPTION
839-0610 Direct vent Room Heater - matte black - natural gas, standing pilot
839-0630 Direct vent Room Heater - porcelain black - natural gas, standing pilot
839-0650 Direct vent Room Heater - porcelain creme - natural gas, standing pilot
839-0670 Direct vent Room Heater - porcelain green - natural gas, standing pilot
839-0690 Direct vent Room Heater - porcelain blue - natural gas, standing pilot
844-0150 Fan Kit, variable speed, thermostat “ON/OFF”
844-0140 Decorative Glass accent - gold
844-7900 Warming Shelf - matte black (pr.)
844-7910 Warming Shelf - porcelain black (pr.)
844-7930 Warming Shelf - porcelain creme (pr.)
844-7940 Warming Shelf - porcelain green (pr.)
844-7920 Warming Shelf - porcelain blue (pr.)
844-7970 Warming Shelf Bracket - w/mitten rod, black (pr.)
844-7980 Warming Shelf Bracket - w/mitten rod, gold (pr.)
844-9230 LP Conversion Kit
844-8250 NG Conversion Kit
The table below is a list of only those components which may be safely used with this appliance.
DESCRIPTION OF THE HEATER SYSTEM
The installation of this DOVRE DV450S system con-
sists of the following:
1. Appliance
2. Venting System
3. T
ermination
NOTE: Operation of a Direct Vent
Heater may be sporadic in high
wind situations.
The DV450S is a Direct Vent Room Heater. Combustion air
is supplied from outside, not from inside the house as with
other types of heaters.
Optional components include:
1. Blower Kit
2. Decorative Glass Accent
3. Warming Shelf
4. Bracket with Mitten Rod
5. Remote Control

01-01 Page 6 29863C
DV450S DIRECT VENT ROOM HEATER
28"
27 - 3/8"
30 - 3/8"
16 - 3/4"
19 - 1/8"
22 - 5/8"
8"
5 - 1/8"
39"
DV450S Front View - With and Without Optional Warming Shelves DV450S - With Optional Blower
DIMENSIONS
Figure 1
Minimum Clearances To Combustibles
The following clearances to combustibles must be main-
tained:
Minimum clearances to the floor - 0"
Back of unit to wall - 6”
Sides of unit to wall - 9"
Base of the unit to ceiling - 72".
Minimum clearances to Venting are as follows:
Horizontal runs require a 1-1/2” minimum Air Space on the top and
an 1/2” minimum Air Space on the sides and bottom of the outer
Vent Section. If an Elbow is being used,in an enclosed wall, floor
or ceiling, a top Air Space clearance of 3” must be maintained.
Vertical rise sections require a 1” minimum Air Space completely
around the Vent section. These clearances must be maintained
at all times.
This appliance is certified for installation in a bed/sitting sitting room
in the U.S. and Canada.
Mobile Home Installations. Appliances installed in Mobile Homes
must be secured to the floor in a minimum of two locations.
STOVE
STOVE
6"
9"
6"
9" 48"
MAX.
4"
4"
STOVE
HEARTH PROTECTION IS NOT
NECESSARY WITH THIS APPLIANCE
ON A HARD SURFACE.
Positioning the Appliance.
This appliance may be placed on a combustible or non-combus-
tible continuous, flat surface. When the appliance is installed
directly on carpeting, tile or other combustible material other than
wood flooring, the appliance shall be installed on a metal or wood
panel extending the full width and depth of the appliance. Slide
the Heater into position and level the Heater from side-to-side
and front-to-back. Shim as necessary.
CLEARANCES

DV450S DIRECT VENT ROOM HEATER
01-01 Page 7 29863C
Dura-Vent
PART # DESCRIPTION:
Termination Caps & Snorkles:
991 High Wind Vertical Termination Cap
986 High Wind Horizontal Termination Cap
980 Vertical Termination Cap w/Wind Halo
983 Vertical Termination
984 Horizontal Termination Cap
981 Snorkel Termination (36”)
982 Snorkel Termination (14”)
950 Vinyl Siding Standoff
Flashing:
941 Cathedral Ceiling Support Box
943 Flashing, 0/12 to 6/12 Roof Pitch
943S Flashing, 7/12 to 12/12 Roof Pitch
943F Flashing, Flat Roof
Support Boxes/Thimbles:
940 Round Ceiling Support/
Wall Thimble Cover
941 Cathedral Ceiling Support Box
Pipe:
908 6” Pipe Length, Galv.
908B 6” Pipe Length, Black
907 9” Pipe Length, Galv
907B 9” Pipe Length, Black
906 12” Pipe Length, Galv.
906B 12” Pipe Length, Black
904 24” Pipe Length, Galv.
904B 24” Pipe Length, Black
903 36” Pipe Length, Galv.
903B 36” Pipe Length, Black
902 48” Pipe Length, Galv.
902B 48” Pipe Length, Black
911 11” -14 5/8” Pipe, Adj. Glv.
911B 11” -14 5/8” Pipe, Adj. Blk.
912 12” - 17” Pipe, Adj. Glv.
912B 12” - 17” Pipe, Adj. Blk.
917 17” -24” Pipe, Adj. Glv.
917B 17” -24” Pipe, Adj. Blk.
945 45° Elbow, Galv.
945B 45° Elbow, Black
990 90° Elbow, Galv.
990B 90° Elbow, Black
Misc.
953 Storm Collar
963 Ceiling Firestop
988 Wall Strap
9546 Attic Insulation Shield
942 Wall Thimble/Cathedral Ceiling Collar
SDV KITS
970A Standard Termination Kit includes
1 each of:“ 990B, 940, & 985
See Note #1 below.
971HW Standard Termination Kit includes
1 each of:“990B, 940, 985, 904B, 911B
973 Vertical Termination Kit includes 1 each
of:“943, 953, 991 (support box NOT
included)
Note #1: Straight pipe lenghts are needed to complete
installation, the black 45° elbow is NOT included in kit.
The following venting parts are available from your
Dealer:
HHW2 Horizontal High Wind Cap
HHW2K Horizontal Kit includes 90° Black Elbow,
Wall Thimble, 24" Black Pipe, 11" - 14
5/8" Adjustable Vent, HHW2
Termination Cap.
The VTA1, Vertical Termination Adapter Kit, may also be
safely used with this Heater. It is composed of a Vertical
Termination Cap and Cover Plate for existing vertical
chimney.
DURA-VENT VENTING COMPONENTS

01-01 Page 8 29863C
DV450S DIRECT VENT ROOM HEATER
TERMINATION EXAMPLES
Four types of Termination are possible for this Heater: Horizontal, Vertical, Existing Masonry or Existing Class A
Class A Metal Chimney Vertical Flat Ceiling Horizontal Termination
Cathedral Ceiling

DV450S DIRECT VENT ROOM HEATER
01-01 Page 9 29863C
16'
MAX.
15' MAX.
VENTING CAN ONLY TERMINATE
WITHIN THIS AREA.
2'
MIN.
10' MAX.
15" MIN.
4'
29" 591/2"* * MINIMUM VENT
HEIGHT (CENTER)
(SEE NOTE)
15' MAX. HORIZONTAL RUN
2' 3' 4' 5' 6' 7' 8' 9' 10' 11' 12' 13' 14' 15'
16'
Thru
4'
3'
2'
XXXXXXX X X X
X
X
X
X
X
X
X
X
X
X
X
XX
X
X
XX
X
X
X
X
X
X
X
X X X X
X X X X X
X
XX X X X X
X
XX
X
X
XX
XX
X
V
E
R
T
I
C
A
L
R
I
S
E
INSTALLATION
A. Horizontal Termination
Refer to Chart A for horizontal venting recommendations. The
minimum vertical rise allowed for horizontal termination is 2' from
the top of the heater. The maximum horizontal run allowed for
venting is 15' with a minimum 4' rise.
CHART A
Note: A horizontal run of vent must have
a 1/4" rise for every 1 ft. of run towards
the termination. Never allow the vent to
run downward. This could cause high
temperatures and the possibility of a fire.
A single vertical to horizontal elbow is already calculated into the
allowable 15' run. Each additional elbow reduces the maximum
horizontal distance by three feet. Example: When using three
elbows, the maximum horizontal distance has been reduced to
9' (3 - 1 = 2 elbows x 3' = 6'; 15' max. - 6' of elbows = 9' of
horizontal run). Even with only these three elbows (the equivalent
of 6' additional horizontal feet) you now need a minimum of 4' of
vertical rise. See Chart A.
If a vertical-to-horizontal elbow is enclosed within a wall, floor or
ceiling, an air space clearance of 3" must be maintained.
Due to the many different combineations that can be used when
constructing venting, the number of vent sections required can
only be determined by the installer.
Horizontal venting must terminate within the shaded area shown in
Fig. 2. Chart A illustrates the figures included in that shaded area.
For example, if your vertical rise is the minimum two foot, venting
can terminate anywhere between 20 -1/2" (includes wall thickness
and assumes 4", and venting required to termination cap) and 10'.
Vent termination must not be recessed into the wall or siding.
Fig. 3 illustrates termination cap location and minimum dimensions
for each termination application. Or, follow ANSI Z223.1, latest
edition.
Fig. 3 - Horizontal Lenth
Note: Horizontal runs will require the use of
one vent support for every 3' of vent.

01-01 Page 10 29863C
DV450S DIRECT VENT ROOM HEATER
HORIZONTAL TERMINATION CAP LOCATIONS
A
Openable Fixed
Closed
B
C
FG
H
I
AVV
V
V
KAJ
M
N
V= vent terminal A= air supply inlet
A. *12” (30cm) minimum: Clearance above grade, veranda, porch, deck, or balcony.
B. *12” (30cm) minimum: Clearance to window or door that may be opened.
C. 12” (30cm) minimum: Clearance to permanently closed window (recommended to prevent condensation on window.
D. 18” (46cm) minimum: Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2’
(60cm) from the centerline of the terminal.
E. 12” (30)cm) minimum: Clearance to unventilated soffit.
F. 6” (15cm): Clearance to outside corner.
G. 9” (23cm): Clearance to inside corner.
*Not to be installed above a meter/regulator (gas or electrical) assembly within 3’ (90cm) horizontally from the centerline
of the meter/regulator.
H. *6’ (1.8m) minimum: Clearance to service regulator vent outlet.
I. *12” (30cm) minimum: Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other
appliance.
J. *6’ (1.8m) minimum: Clearance to a mechanical air supply air inlet.
K. *+7’ (2.1m) minimum: Clearance above paved sidewalk or a paved driveway located on public property.
L. *#12” (30 cm) minimum: Clearance under veranda, porch, deck, or balcony.
M. 6” (15 cm) minimum: Clearance to adjacent building or deck.
N. 6” (15 cm) minimum: Clearance to nearby building
+A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single-family dwellings and
serves both dwellings.*
#Only permitted if veranda, porch, deck, or balcony, is fully open on a minimum of two sides beneath the floor.*
*As specified in CGA B149 Installation Codes
Note: Local Codes or regulations may require different clearances.

DV450S DIRECT VENT ROOM HEATER
01-01 Page 11 29863C
NOTE: For buildings with vinyl siding, a Vinyl Siding
Standoff should be installed between the vent cap and
the exterior wall. Attach the Vinyl Siding Standoff
to the Horizontal Vent Termination. The Vinyl Siding
Standoff prevents excessive heat from possible melt-
ing the vinyl siding material. NOTE: The HHW2 cap
incorporates it's own vinyl siding standoff. See Fig. 8.
2. Assembling Venting Sections. Use only vent supplied or
listed for use with this Heater. To attach a straight section to
the top of the Heater, female end down, slide the pipe over the
outer Collar on the Heater while the inner flue will slip over the
Vent Inner.
MAINTAIN MINIMUM CLEARANCES OR GREATER AROUND
THE VENT SYSTEM. Do not pack air spaces with insulation or
other material.
If the wall being penetrated is constructed of non-combustible
material (i.e.: masonry block or concrete) a 7 inch diameter
hole is acceptable. It is recommended that for masonry walls the
vent be wrapped with fiberglass insulation to prevent contact with
the masonry as the contact promotes premature deterioration of
the vent.
The Dura-Vent GS is unitized and twist-locks together. For the
twist-lock procedure, consult Figure 5 and do the following:
(1) Four indentations, located on the female ends of pipes and
fittings, are designed to slide straight onto the male ends of
adjacent pipes and fittings, by orienting the four pipe indentations
so they match and slide into the four entry slots on the male
ends. See Figure 5. Push the pipe sections completely together,
then twist-lock one section clockwise approximately one-quarter
turn, until the two sections are fully locked. The female locking
lugs will not be visible from the outside, on the Black Pipe or
fittings. They may be located by examining the inside of the
female ends.
(2) Horizontal runs of vent must be supported every three feet.
Wall Straps are available for this purpose.
Before connecting the horizontal run of vent pipe to the vent
termination, slide the black decorative wall thimble cover over the
vent pipe.
When using the adjustable section, maintain a 1” overlap on
pipe sections and secure. It is also important that the vent pipe
extends a minimum of 1 1/2” into vent cap.
3. Termination Cap. Position the horizontal vent termination so
that 1 1/2” clearance is maintained on top of the vent sections
and 1 1/2” on sides.
Before attaching the Vent Termination to the exterior wall, run a
bead of non-hardening mastic around the outside edges to make
a seal between the Cap and the wall.
Attach Cap to exterior wall with four (4) wood screws, making
sure that arrow on Cap is pointing up. After Cap is attached,
make sure that a 1 1/2” is maintained from top of vent to combus-
tibles.
Secure the connection between the vent pipe and the vent cap
by attaching the two sheet metal strips extending fromthe vent
cap assembly into the outer wall of the vent pipe. Use the two
sheet metal screws provided to connectthe strips to the pipe sec-
tion. Bend any remaining portion of the sheet metal strip back
towards the vent cap, so it will be concealed by the decorative
wall thimble cover. See Fig.6.
Slide the Decorative Wall Thimble up the wall surface and attach
with the screws provided. Apply Decorative Brass or Chrome
Trim if desired. See Fig. 7.
4. Vertical Rise on the Exterior. For installations requiring
a vertical rise on the exterior of a building, 14” and 36” tall
Snorkel Terminations are available. Follow the same installation
procedures that are used for the standard horizontal termination
found in Step 3.
Figure 5 - Twist-lock procedure
1. Preparing the Wall for Horizontal Termination. A hole
measuring 10” wide and 10” high must be cut and framed in the
exterior wall where venting will be terminated.
The height of the hole must be located to meet all local and
national codes and not be easily blocked or obstructed. The
minimum height to the center of the horizontal vent is 591/2''
from the base of the unit. This figure will increase by the length
of each vertically positioned vent section added to the venting
system. See Figure 4.
Figure 4 - Exterior Wall Hole
EXTERIOR
WALL
HOLE TO BE
VENTED
THROUGH
10''x 10'' DURA-
VENT MINIMUM
541/2'' 591/2''
Female
Locking
Lugs
Male
Locking
Lugs

01-01 Page 12 29863C
DV450S DIRECT VENT ROOM HEATER
B. Vertical Termination.
The following figures are the maximum distances from the top
of the unit, as well as the minimum air space clearances that
must be maintained: Maximum straight unsupported rise - 25';
Maximum height - 40' from the top of the unit. Maximum horizon-
tal unsupported run - 3'; air space clearances around vertical
venting - 1" on all sides; air space clearances around horizontal
venting - 11⁄2" on top and 1⁄2" on sides and bottom. If an elbow
is being used in an enclosed wall, floor, or ceiling a top air space
clearance of 3" must be maintained. These clearances must be
maintained at all times.
1. Position the Heater.
Position the heater in its desired location. Maintain all clearances
to combustibles.
2. Preparing the Ceiling.
Drop a plumb bob down from the ceiling to the position of
the heater flue exit and mark the location where the vent will
penetrate the roof. Drill a small hole at this point. Next drop
a plumb bob from the roof to the hole previously drilled in the
ceiling and mark the spot where the vent will penetrate the
roof. Determine if ceiling joists, roof rafters, or other framing will
obstruct the venting system. You may wish to relocate or offset
the appliance to avoid cutting load bearing members.
To bypass any overhead obstructions the vent system may be
offset using a 45° elbow or a 90° elbow. Vent stabilizers have
straps for securing these parts to joists or rafters. lumbers tape
may be purchased locally and used in conjunction with vent
stabilizers. See Fig. 9
3. Assembling vent sections. Only use vent supplied and
listed for use with this Heater.
To attach a straight section to the top of the Heater, with
the female end down, slide that pipe over the outer Collar
on the Heater while the Vent Inner slips into the Flue of
the Heater. MAINTAIN MINIMUM 1" CLEARANCES OR
GREATER AROUND THE VENT SYSTEM. Do not pack air
spaces with insulation or other material.
VINYL
SIDING
APPLY SEALANT TO ALL
FOUR SIDES
VINYL SIDING
STANDOFF
SCREW
BOLT HORIZONTAL
TOP TO VINYL
STANDOFF
WALL
THIMBLE
STRAP
Figure 6 - Insertion of Vent Pipe
Figure 7 - Decorative Wall Thimble
Figure 8 - Vinyl Standing Standoff
90° ELBOW
90° ELBOW
VENT
STABILIZER
Figure 9 - Elbows with Stabilizer

DV450S DIRECT VENT ROOM HEATER
01-01 Page 13 29863C
WARNING!
THIS APPLIANCE MAY ONLY USE THE APPROVED
VENTING SYSTEMS SHOWN IN THESE
INSTALLATION INSTRUCTIONS. IT MUST NOT BE
CONNECTED TO CHIMNEY FLUE SERVICING A
SEPARATE SOLID FUEL OR GAS FUEL BURNING
APPLIANCE.
H (MIN.)-MINIMUM HEIGHT
FROM ROOF TO LOWEST
DISCHARGE OPENING
ROOF PITCH IS X/12
LISTED
CAP
LOWEST
DISCHARGE
OPENING
12
X
2 Ft.
Min.
2 Ft. Min.
VERTICAL WALL
HORIZONTAL OVERHANG
Roof Pitch H (min.) ft.
flat to 6/12 1.0
6/12 to 7/12 1.25
over 7/12 to 8/12 1.5
over 8/12 to 9/12 2.0
over 9/12 to 10/12 2.5
over 10/12 to 11/12 3.25
over 11/12 to 12/12 4.0
over 12/12 to 14/12 5.0
over 14/12 to 16/12 6.0
over 16/12 to 18/12 7.0
over 18/12 to 20/12 7.5
over 20/12 to 21/12 8.0
The Dura-Vent GS is unitized and twist-locks together. For the
twist-lock procedure, consult Figure 5 and do the following:
(1) Four indentations, located on the female ends of pipes and
fittings, are designed to slide straight onto the male ends of
adjacent pipes and fittings, by orienting the four pipe indentations
so they match and slide into the four entry slots on the male
ends. (Figure 5.) Push the pipe sections completely together,
then twist-lock one section clockwise approximately one-quarter
turn, until the two sections are fully locked. The female locking
lugs will not be visible from the outside, on the Black Pipe or
fittings. They may be located by examining the inside of the
female ends.
(2) Horizontal runs of vent must be supported every three feet.
Wall Straps are available for this purpose.
Assemble the desired lengths of black pipe and elbows. It is
necessary to reach from the Heater up through the round support
box. Ensure that all pipe and elbow connections are in their fully
twist lock position.
Using the mark from Step 2, drive a nail up through the roof to
mark the center. Measure to either side of the nail and mark
the opening required. This is measured on the horizontal; actual
length may be larger depending on the pitch of the roof. Cut out
and frame the opening. See chapter 25 of the Uniform Building
Code for Roof Framing details. A one inch minimum air space
clearance must be maintained between the vent system and the
roof.
Assemble lengths of pipe and elbows necessary to reach from
the ceiling support box up through the roof line. Galvanized pipe
and elbows may be utilized in the attic, as well as above the roof
line. The galvanized finish is desirable above the roof line due to
its higher corrosion resistance.
4. Installing the Roof Flashing or Site-Produced Chase Top.
Position a Roof Flashing (or construct a Chase and Chase Top)
and secure in place with nails.
Continue to add Vent sections through the Roof Opening, main-
taining at least 1” Air Space clearance. Major Building Codes
specify a minimum Vent (Chimney) height above the Roof top
depending on Roof Pitch. See Figure 10. Add Pipe sections
until the height of the Vent Cap meets the minimum Building Code
requirements described in Figure 10. Note that for steep roof
Pptches, the vent height must be increased.
These Vent System heights are necessary in the interest of
safety, however, they do not ensure draft-free operation. Trees,
buildings, adjoining Roof lines, adverse wind conditions, etc., may
create a ned for a taller Vent System should down drafting occur.
5. Termination Cap. Twist lock the Vent Cap.
Figure 10 -Vent (Chimney) Height

01-01 Page 14 29863C
DV450S DIRECT VENT ROOM HEATER
C. Existing Masonry Chimney Installation
This installation is subject to local jurisdiction. Some codes
may require the use of another liner for intake air. If so, the
4” aluminum liner should be inside a 6” UL 181 listed liner.
This Heater can be vented through an existing Masonry Chimney
but the chimney must be lined with one UL 1777 listed 4” alumi-
num flexible gas vent liner for exhaust. The existing Flue will
be used to supply the air intake to the galvanized steel Flue
system. See Figure 11. Before installing the liner system, the
chimney passageway should be cleaned and examined to
verify it is unobstructed and in good structural condition.
Measure and record the chimney dimensions to determine total
flexible liner requirements.
Follow the liner manufacturer’s instructions for installing the liner
in the chimney. Attach a flexible liner puller to the liner and secure
a rope to the puller. One person should feed the liner through
the chimney, and another person should pull the liner from the
bottom, with the rope, guiding the liner down the chimney. After
feeding the liner down the chimney, form a 90˚ angle and bring
the liner through the hole in the chimney wall. (If running two
liners, run the 6” liner first and then the 4” inside of it.) Extend the
liner through the wall of the chimney and attach it to the venting
system extending from the top of the Heater.
Construct a metal flashing large enough and strong enough
to cover the chimney opening and support the Heater Vertical
Termination Cap. The flashing needs to fold down over and
around the outside of the masonry chimney so that it can be
secured to the chimney by 4 screws. See Figure 12. The
flashing will require a hole at least 6 1/2'' in diameter. (If using a
6” liner, extend the 6'' flexible liner through the flashing and attach
it to the VTA (Vertical Termination Adapter) with screws provided.)
Secure the VTA to the flashing with the screws provided and seal
the VTA/Flashing joint with a silicone sealant to prevent moisture
from running down the liner into the chimney.
Attach the 4'' gas vent liner to the Vertical Termination Cap with
screws provided, then attach the Termination Cap to the VTA with
screws provided. See Figure 12.
Figure 11
Adaptation to Masonry Chimney
WALL THIMBLE/
TRIM COLLAR
INSIDE CHIMNEY
DIAMETER
6" MINIMUM
4'' UL 1777 LISTED
GAS VENT INNER
FLEX LINER
24" MINIMUM
VERTICAL HEIGHT
DURA-VENT GS
VENTING
6"
INTAKE AIR
EXHAUST
SEAL WITH SILICONE
SEAL WITH SILICONE
Figure 12
Masonry Termination
RIGID FLASHING
(ATTACHED TO CHIMNEY
WITH SCREWS WITH
SILICONE SEALANT
UNDERNEATH)
SILICONE SEALANTVTA
6" LINER (OPTIONAL)
WARNING
WHEN VENT SECTIONS EXCEEDING 3 FEET IN
LENGTH ARE INSTALLED BETWEEN AN OFFSET/
RETURN, STRUCTURAL SUPPORT MUST BE
PROVIDED TO REDUCE OFF-CENTER LOADING AND
PREVENT VENT SECTIONS FROM SEPARATING AT
THE VENT JOINTS.

DV450S DIRECT VENT ROOM HEATER
01-01 Page 15 29863C
Figure 13
Retro-Fit to Metal
Chimney
D. Existing Class A Metal Chimney Termination
In many cases where a DOVRE DV450S is replacing a wood-
stove, much of the existing Class A Metal Chimney can be
incorporated into the direct vent system.
The existing chimney must comply with NFPA-211 codes and any
local code requirements.
The chimney should be cleaned and examined to verify
it is unobstructed and in good structural condition. Any
structural weaknesses such as cracks, leaky joints, cor-
roded or warped surfaces can have an adverse effect on
the performance of this Heater and should be replaced or
repaired.
Whenever an existing Class A Metal Chimney is on an outside
wall, removal of the chimney and the use of the minimum hori-
zontal direct vent termination kit may be less expensive.
When using an existing Class A Metal Chimney the following
requirements are necessary:
Minimum size diameter is 6 inches.
Minimum height from the base of the stove to the top of termina-
tion cap is 9 feet.
The vent from the top of the Heater to the Chimney must be rigid
vent sections. A 4'' UL 1777 listed gas vent aluminum flexible
liner can be used inside the chimney. The flexible liner must
be secured to the last rigid section with three (3) sheet metal
screws. A minimum 3 inch overlap is required. Remove and
discard the existing chimney termination cap.
Determine the length of the 4'' UL 1777 listed gas vent flex liner
required to meet the vent sections at the top of the Heater.
Follow the liner manufacturer’s instructions for installing the liner
in the chimney. Attach a flexible liner puller to the liner and
secure a rope to the puller. One person should feed the liner
through the chimney, and another person should pull the liner
from the bottom, with the rope, guiding the liner down the chim-
ney. Extend and run the 4'' gas vent liner down the chimney
leaving 10'' extending from the top of the chimney stack.
Install and secure the VTA (Vertical Termination Adapter) onto the
chimney with the brackets provided.
Place and secure the Termination Cap on the VTA with the
screws provided. See Figure 13.
VERTICAL
TERMINATION
CAP VERTICAL
TERMINATION
ADAPTER
UL1777 LISTED
4'' GAS VENT
FLEX LINER
EXISTING
CLASS A
METAL
CHIMNEY
(6'' MIN. DIAMETER)
DURAVENT GS
VENT SECTIONS

01-01 Page 16 29863C
DV450S DIRECT VENT ROOM HEATER
GAS LINE INSTALLATION
The Valve is located near the lower Right Rear Corner of the
appliance. Install the Gas Supply Line to the backside of the
unit to ease installation of the unit to the Supply Line, a flexible
connector and Manual Shut - Off Valve are supplied. The Manual
Shut - Off Valve should be installed onto the Supply Line, ahead
of the flex. All connections must be checked for leaks with a soap
and water solution or Gas Sniffer.
GAS PRESSURE
For natural gas, the minimum inlet gas supply pressure is 4.5
inches water column, and the maximum inlet gas pressure is 7.0
inches water column, for the purpose of input adjustment. Input
rate is 40,000 Btu/hr. For propane gas, the inlet gas supply pres-
sure must be at least 11.0 inches water column and a maximum
14.0 inches water column. Input rate is 38,000 Btu/hr.
Manifold pressure for this Heater is 1.6 - 3.5 inches water column
for natural gas and 6.3 - 10.0 inches water column for propane
gas. This Heater has a variable adjust manifold.Pressure taps
are located on the front of the valve for both inlet and outlet
pressure.
FUEL CONVERSION
For conversion of the DV450S unit, use Kit # 844-9230 to
convert from Natural Gas to LP.
A. Gas and Power Supply.
1. Shut off the Gas Supply to the unit.
2. Unplug the Blower Cord from the Power Supply.
3. Carefully remove the Logs and Burner from the
Firebox. See Figure A for burner removal.
B. Burner Orifice.
Adjust Air Shutter Adjustment Screw as necessary to slide the Air
Shutter off the Burner Orifice.
1. Loosen and remove the Retaining Nut on the Burner Orifice
with a 5/8” wrench. See Figure B.
2. Replace the Burner Orifice with the .073 LP Main Burner
Orifice supplied in kit. Reposition the Air Shutter onto the Burner
Orifice. Refer to Section IX., on the following page, for High
Altitude Installation.
C. Pilot Orifice.
1. Remove top of pilot hood. See Figure C.
2. Use an Allen Wrench to remove the pilot injector orifice. See
Figure D.
3. Replace the pilot hood ensuring that it is seated and aligned.
5. Replace burner into the unit.
Figure A
Figure B
Figure C
Figure D

DV450S DIRECT VENT ROOM HEATER
01-01 Page 17 29863C
HIGH ALTITUDE INSTALLATION
For U.S. installation, units are tested and approved for elevations
from 0-2000 feet.
When installing this unit at an elevation above 2000 feet, it may
be necessary to decrease the input rating by changing the exist-
ing Burner Orifice to a smaller size. Input should be reduced
4 percent for each 1000 feet above sea level. Check with the
local gas utility for proper Orifice size identification. This unit is
shipped with a .125 in./3.18 mm. Main Burner Orifice size for
Natural Gas.
For Canadian installation, units are certified for elevations from
0-4500 feet. When installing this unit at an elevation between
0-4500 feet in Canada, the input rating does not need to be
reduced.
When installing this unit at an elevation above 4500 feet in
Canada, check with local authorities.
Consult your local gas company for assistance in determining
the proper Orifice for your location or refer to ANSI Z223.1-latest
edition, Appendix F.
NOTE: This Heater DOES NOT require a 110VAC sup-
ply for operation.
NOTE: This Heater must be electrically wired and
grounded in accordance with Local Codes or, in the
absence of Local Codes, with the National Electric
Code ANSI/NFPA 70-latest edition, or the Canadian
Electrical Code, CSA C22.1.
NOTE: This appliance and its individual Shut - Off
Valve must be disconnected from the Gas Supply
Piping System during any Pressure testing of that
System at Test Pressures in excess of 1/2 psi (3.5kPa).
The appliance must be isolated from the Gas Supply
Piping System by closing its individual Manual Shut
- Off Valve during any Pressure testing of the Gas
Supply Piping System at test levels equal or less than
1/2 psi (3.5 kPa).
D. Valve - Adjustable Regulator.
1. Gain access to the Valve Regulator Head by lifting up on the
Valve Cover and removing the Tabs from the Slots on the Back
Shield.
2. Follow Steps 1 - 3 in the Instructions included with the
Regulator. Save the Label included in the Kit for later attachment
to the unit.
3. Replace the Valve Cover after the Valve has been checked
for leaks.
E. Leak Check.
1. Turn on the Gas Supply to the unit to check for gas leaks
with soap and water.
2. Turn the Gas Control Knob to the “Pilot” position.
Push the Knob in all the way and hold. At the same time, push in
the Red Ignitor button repeatedly until the Pilot lights. Never hold
the Gas Control Knob for more than [10] seconds if the Pilot does
not light. Once the Pilot lights, continue to hold the Control Knob
in for 15 seconds. Release the Gas Control Knob and it will pop
back out. Test for leaks at the Pilot Assembly using a soap and
water solution or a a Gas Sniffer. Turn the Gas Control Knob to
the “ON” position and turn the Switch On. Check for leaks around
the Valve and the Burner Orifice
WARNING!
THE INSTALLATION OF THIS
CONVERSION KIT MUST ONLY
BE UNDERTAKEN BY A QUAL-
IFIED AND CERTIFIED GAS
APPLIANCE INSTALLER.
WARNING !
This conversion kit shall be installed by a qualied service agency in accordance
with the manufacturer’s instructions and all applicable codes and requirements of the
authority having jurisdiction. If the information in these instructions is not followed
exactly, a re, explosion or production of carbon monoxide may result causing property
damage, personal injury or loss of life. The qualied service agency is responsible
for the proper installatin of this kit. The installation is not proper and complete until
the operation of the converted appliance is checked as specied in the manufacturer’s
instructions supplied with the kit.

01-01 Page 18 29863C
DV450S DIRECT VENT ROOM HEATER
OPTIONAL ACCESSORIES
A. Optional Fan
Blower Installation:
1. Remove the Knockout Plate from the Backshield of the
DV450S by prying out on the plate and clip or break the tabs that
hold it in place. See Figure 1 below.
2. Remove the tape from the back of the strip of Gasket Material
included with the blower kit, and position the Gasket over the edge
of the opening of the Backshield. See Figure 2 below. (This will
eliminate vibration.)
3. Install the Blower into the Backshield by hooking the bottom
of the Blower Housing into the opening and rock the top of the
Blower forward. Fasten the blower in place with the screws
included in the Fastener Pack. See Figure 3 on this page.
4. Attach the Switch Control Box on the Backshield with the
screws provided. See Figure 4, this page.
5. Plug the Connector on the wiring assembly into the Receptacle
on the top of the Blower Housing. See Figure 5, this page.
Figure 1
Removal of Knockout Plate
Figure 2
Placing Blower Gasket on Back Shield
Figure 3
Fan Installation on Back Shield
Figure 4
Attach Switch Control Box
Receptacle
Blower
Control
Box
Figure 5
Receptacle
The Optional Fan Kit (844-0150) requires a 110VAC supply.
Optional accessories may be added now or at a later date.

DV450S DIRECT VENT ROOM HEATER
01-01 Page 19 29863C
WARNING!
Electrical Grounding Instructions
This appliance is equipped with a three-prong (grounding)
plug for your 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 this plug.
Blower Wiring Diagram
Figure 12 - Wiring Diagram
B. Optional Wall Thermostat
The use of a millivolt Thermostat is allowed. It must be located
within 20 feet of the appliance. In order for the Thermostat to
work, the “ON/OFF” Switch must be in the “ON” position.
Figure 12 shows how to connect a millivolt Thermostat without
the “ON/OFF” Switch in the Circuit. Disconnect the “ON/OFF”
Switch from the Valve and wire the millivolt Thermostat as indi-
cated.
20613 (1)
14212 (1)
25385 (1)
25579 (1)
25580 (1)
28749 (1)
18164 (1)
23998 (1)
Rocker Switch /WallThermostat / Remote
Variable
Regulator
Pilot
Adjustment
Cap
Manifold Pressure
Inlet Pressure
Push Button
Ignitor
Ignitor
Thermopile
Pilot
Thermocouple
C. Remote Control
A remote control thermostat may be installed on this stove.
Contact your dealer for the correct model.
D. Warming Shelves/Brackets
Please see the Installation Instructions included with the Shelves.
Refer to page 5, Heater System Components, for ordering pur-
poses.
E. Door Trim
Part # 844-0140. Please the Installation Instructions included
with the Door Trim.
Warming Shelf and Bracket
Decorative Glass Accent

01-01 Page 20 29863C
DV450S DIRECT VENT ROOM HEATER
Figure 21 - Removal of Sealed Glass
Firebox Entry
A. Removing the Front Face.
1. Losen the Thumb Screw from the bottom of the unit that holds
the Front Face in position. See Figure 20.
2. Carefully lift the Front Face up and pull the bottom forward.
Place in a safe place.
Figure 22 - Log Identification
D. Creating the Coal Bed Look.
Ember Chunks.
Randomly place the Ember Chunks on the Burner Pan between
and in line with the two front logs, creating a small wall of
embers. Do not allow the Chunks to cover the burner ports or air
holes in the Burner Pan as this may restrict air and/or gas flow,
creating a less than satisfactory performance. Too much restric-
tion can cause improper combustion and sooting (especially with
an appliance using propane gas). It is not necessary to use all of
the Chunks supplied with the unit.
Once the Burner Pan has been correctly covered with Ember
Chunks, place a single row of ember Chunks on the ember tray
located at the front of the Log Assembly.
Once the Ember Chunks are in place, a thin layer of Mineral Wool
may be bridged over the Chunks for greater enhancement.
B. Removing the Glass.
3. Remove the Glass Frame Assembly by pulling the Latch
Releases forward and upward. See Figure 21. Lift the Glass
Frame Assembly up, sliding the [3] tabs at the bottom out of
the slots.
Lava Rock.
Distribute the lava rock over the surface of the hearth pan next
to the glass being careful not get lava rock down into the air
inlet slots or onto the surface of the Burner Pan. The lava rock
does not change the flame and does not have to be used. A
different look to to the front of the unit is to add a row of ember
Chunks.
C. Log Placement.
The logs are shipped in separate packaging. Refer to Fig. 22 for
identification for the installation process.
Figure 20 - Bottom Thumb Screw
REAR LOG
LEFT
TWIG RIGHT
TWIG
LEFT LOG RIGHT LOG
1. Place rear log over two white pins on the firebox floor at the
back of firebox. See Fig. 23.
2. Set left log over two pins on left side of firebox floor. Fig. 24.
3. Set right log over two pins on right side of firebox floor.
4. Set left twig over one pin on top left of rear log and into groove
on front left log.
5. Set right twig over two pins on top right of rear log and into
groove on front right log.
Figure 23
Rear Log
Placement
Figure 24
Left and Right
Log Placement