Vermont Castings WDVST500NTSCSB, WDVST500PTSCSB Installation And Operating Instructions Manual

WDV See-thru Direct Vent Gas Fireplace

S

Installation and Operating Instructions

Models: WDVST500NTSCSB, WDVST500PTSCSB

WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly

could result in serious injury, death or
property damage.

• Do not store or use gasoline or other

ammable 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.
– Leave the building immediately.
– 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 re department.

• Installation and service must be performed

by a qualied installer, service agency or

the gas supplier.

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 installer, service agency or the

gas supplier.

This appliance may be installed in an aftermarket,*
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by
local codes.

This appliance is for use only with the type of gas

indicated on the rating plate. This appliance is
not convertible for use with other gases, unless
a certied kit is used.

* Aftermarket: Completion of sale, not for purpose of resale, from

the manufacturer.

CERTIFIED

AFETY BARRIER

DANGER

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

A barrier designed to reduce the risk of burns from

the hot viewing glass is provided with this

appliance and shall be installed.

INSTALLER: Leave this manual with the appliance.

CONSUMER: Retain this manual for

future reference.

20306746 12⁄14 Rev. 1

WDV See-thru Gas Fireplace

CONTENTS

Thank you and congratulations on your purchase of a

Vermont Castings Group Fireplace.

PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE!

IMPORTANT: Read all instructions and warnings carefully before starting installation.

Failure to follow these instructions may result in a possible re hazard and will void the warranty.

Important Safety Information .....................................3

Code Approval ........................................................4

Pre-Installation Information ........................................5

Product Specications ............................................5

High Elevations .......................................................5

Gas Pressures ........................................................5

Gas Specications & Orice Size ...........................5

Before You Start ...................................................... 5

Firebox Framing ......................................................5

Fireplace & Framing Dimensions ............................ 6

Fireplace Location ...................................................7

Clearances ..............................................................8

Secure Fireplace to Floor or Framing .....................9

Finishing Material ....................................................9

Venting Installation ....................................................10

Installation Precautions .........................................10

Installation Planning .............................................. 11

Horizontal Termination .......................................... 11

Vertical Termination ............................................... 11

Installaing Vent in a Chase ...................................11

Termination Locations ........................................... 12

Vent Graph ............................................................13

Vertical Sidewall Installation ..................................14

Vertical/Horizontal Termination Congurations .....15

Below Grade Installation .......................................16

Vertical Through-the-Roof

Applications & Installation .....................................17

Installation for Vertical Termination .......................18

Flex Vent Installation .............................................20

Fireplace Installation .................................................22

Check Gas Type....................................................22

Install Gas Piping to Fireplace/Burner System .....22

Check Gas Pressure .............................................23

Electrical Installation .............................................24

Electrical Wiring ....................................................24

Junction Box Wiring ..............................................24

Command Center Wall Installation ........................24

Wall Switch Installation .........................................24

SCS Wiring Diagram .............................................25

Optional Fan/Blower Systems .............................. 26

Glass Frame Removal ..........................................27

Light Installation ....................................................28

Stone & Glass Placement .....................................28

Glass Only Placement ..........................................28

Safety Barrier Installation ...................................... 29

Operating Instructions ..............................................30

Operating Instructions ...........................................31

To Turn Off Gas .....................................................31

Signature Command System Operation..................32

Touch Screen Remote Control Operation ............. 35

Cleaning and Maintenance .......................................41

Burner, Pilot and Control Compartment ................41

Pilot Flame ............................................................41

Burner Flame ........................................................41

Vent System ..........................................................42

Glass Door ............................................................42

Stones ...................................................................42

Troubleshooting ........................................................43

Replacement Parts ....................................................44

Firebox Components .............................................44

Signature Command System ................................45

Stones ...................................................................47

Venting Components .............................................48

Mass Residents Only ................................................50

Warranty .....................................................................51

Efciencies.................................................................52

2

20306746

IMPORTANT SAFETY INFORMATION

WDV See-thru Gas Fireplace

INSTALLER

Please leave these instructions with the appliance.

OWNER

Please retain these instructions for future reference

• Read this owner’s manual carefully and completely before trying to assemble, operate,

or service this replace.

• Any change to this replace or its controls can be dangerous.

• Improper installation or use of this replace can cause serious injury or death from

WARNING

re, burns, explosions, electrical shock and carbon monoxide poisoning.

This replace is a vented product. This replace must be
properly installed by a qualied service person. The glass

door must be properly seated and sealed. If this unit is not

properly installed by a qualied service person with glass

door properly seated and sealed, combustion leakage
can occur.

CARBON MONOXIDE POISONING: Early signs of carbon

monoxide poisoning are similar to the u with headaches,
dizziness and/or nausea. If you have these signs, the re-

place may not have been installed properly. Get fresh air

at once! Have the replace inspected and serviced by a
qualied service person. Some people are more affected

by carbon monoxide than others. These include pregnant
women, people with heart or lung disease or anemia,

those under the inuence of alcohol, and those at high

altitudes.

Propane/LP gas and natural gas are both odorless. An
odor-making agent is added to each of these gases. The
odor helps you detect a gas leak. However, the odor added
to these gases can fade. Gas may be present even though
no odor exists.

Make certain you read and understand all warnings. Keep

this manual for reference. It is your guide to safe and proper

operation of this replace.

1. 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 certied

kit is used.

2. For propane/LP replace, do not place propane/LP

supply tank(s) inside any structure. Locate propane/
LP supply tank(s) outdoors. To prevent performance
problems, do not use propane/LP fuel tank of less than
100 lbs. capacity.

3. If you smell gas

• shut off gas supply.

• 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.

4. Never install the replace

• in a recreational vehicle

• where curtains, furniture, clothing, or other am-

mable objects are less than 42" from the front, top,

or sides of the replace

• in high trafc areas

• in windy or drafty areas

5. This replace reaches high temperatures. Keep children

and adults away from hot surfaces to avoid burns or
clothing ignition. Fireplace will remain hot for a time after
shutdown. Allow surfaces to cool before touching.

6. Carefully supervise young children when they are in

the room with replace.

7. Do not modify replace under any circumstances. Any

parts removed for servicing must be replaced prior to

operating replace.

8. Turn replace off and let cool before servicing, install­ing, or repairing. Only a qualied service person should
install, service, or repair the replace. Have burner

system inspected annually by a qualified service
person.

9. You must keep control compartments, burners, and
circulating air passages clean. More frequent clean­ing may be needed due to excessive lint and dust.
Turn off the gas valve and pilot light before cleaning

replace.

10. Have venting system inspected annually by a quali-

ed service person. If needed, have venting system

cleaned or repaired. Refer to Cleaning and Mainte­nance, Page 41.

11. Keep the area around your replace clear of combus­tible materials, gasoline, and other ammable vapor
and liquids. Do not run replace where these are used

or stored. Do not place items such as clothing or deco-

rations on or around replace.

12. Do not use this replace to cook food or burn paper or

other objects.

13. Never place anything on top of replace.

14. Do not use any solid fuels (wood, coal, paper, card-

board, etc.) in this replace. Use only the gas type

indicated on rating plate.

.

20306746

3

WDV See-thru Gas Fireplace

IMPORTANT SAFETY INFORMATION

15. This appliance, when installed, must be electrically
grounded in accordance with local codes or in the
absence of local codes, with the National Electrical

Code, ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1.

16. Do not obstruct the ow of combustion and ventilation

air in any way. Provide adequate clearances around
air openings into the combustion chamber along with
adequate accessibility clearance for servicing and
proper operation.

17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood

ooring, you must set appliance on a metal or wood

panel or hearth pad extending the full width and depth
of the appliance.

18. Do not use replace if any part has been exposed to
or has been under water. Immediately call a qualied

service technician to inspect the appliance and replace
any part of the control system and any gas control
which as been submerged in water.

19. Do not operate replace if any log is broken.

20. Do not use a blower insert, heat exchanger insert, or
any other accessory not approved for use with this

replace.

21. Do not operate the replace with glass door removed,

cracked, or broken.

IMPORTANT:

PLEASE READ THE FOLLOWING

CAREFULLY

It is not unusual for gas replace to give off
some odor the rst time it is burned. This is due

to the manufacturing process.

Please ensure that your room is well

ventilated during burn off — open all

windows.

It is recommended that you burn your replace
for at least ten (10) hours the rst time you use

it. Place the fan switch in the “OFF" position
during this time.

Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.

WARNING

CODE APPROVAL

Direct Vent type appliances draw all combustion air from
outside of the dwelling through the vent pipe.

These appliances have been tested by CSA and found to
comply with the established standards for VENTED GAS

FIREPLACES in the USA and Canada as follows:

LISTED VENTED GAS FIREPLACES

WDVST500 TESTED TO: ANSI Z21.50-2014 / CSA

2.22-2014 STANDARDS

A manufactured home (USA only) or mobile home OEM

installation must conform with the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part

3280, or when such a standard is not applicable, the

Standard for Manufactured Home Installations, ANSI/
NCSBCS A225.1, or Standard for Gas Equipped Recre-
ational Vehicles and Mobile Housing, CSA Z240.4.

IMPORTANT:

PLEASE READ THE FOLLOWING

CAREFULLY

It is normal for replaces fabricated of steel

to give off some expansion and/or contraction
noises during the start up or cool down cycle.
Similar noises are found with your furnace heat
exchanger or car engine.

DANGER

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

A barrier designed to reduce the risk of burns from

the hot viewing glass is provided with this

appliance and shall be installed.

4

20306746

PRE-INSTALLATION INFORMATION

WDV See-thru Gas Fireplace

PRODUCT SPECIFICATIONS

•

This appliance has been certied for use with either

natural or propane gas. See appropriate data plates.

• This appliance is not for use with solid fuels.

• The appliance is approved for bedroom or bedsitting

room installations.

• The appliance must be installed in accordance with local

codes if any. If none exist use the current installation

code. ANSI Z223.1/NFPA 54 in the USA, CSA B149 in

Canada.

• This appliance is mobile home approved.

• The appliance must be properly connected to a

venting system.

• The appliance is not approved for closet or

recessed installations.

Gas Valve

Command
Center

Figure 1 ­WDVST Fireplace Features

Control

Box & A/C

Module

FP2744

HIGH ELEVATIONS

Input ratings are shown in BTU per hour and are certied

without deration for elevations up to 4,500 feet (1,370
m) above sea level.

For elevations above 4,500 feet (1,370 m) in USA,

installation must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having juris­diction.

In Canada, please consult provincial and/or local authori­ties having jurisdiction for installation at elevations above
4,500 feet (1,370 m).

GAS PRESSURES

Natural Propane (LP)
Inlet Minimum 4.5" w.c. 11.0" w.c.
Inlet Maximum 10.5" w.c. 13.0" w.c.
Manifold Pressure 3.5" w.c. 10.0" w.c.

GAS SPECIFICATIONS & ORIFICE SIZE

Orice
Max.Input Min. Input Size

Model Fuel BTU/h BTU/h Qty. (2)

WDVST500NTSC Nat. 34,000 27,500 #44
WDVST500PTSC LP 34,000 27,500 1.28 mm

BEFORE YOU START

Read this homeowner manual thoroughly and follow all
instructions carefully. Inspect all contents for shipping
damage and immediately inform your dealer if any damage
is found. Do not install any unit with damaged, incomplete,
or substitute parts. Check your packing list to verify that
all listed parts have been received. You should have the
following:

• Fireplace (Firebox and Burner System)

• Reective Glass

• Stone Set

ITEMS REQUIRED FOR INSTALLATION

• Phillips Screwdriver • Framing Materials

• Hammer • Wall Finishing Materials

• Saw and/or saber saw • Level

• Measuring Tape • Pliers

• Electric Drill and Bits • Square

• Pipe Wrench • Tee Joint

• Caulking Material (noncombustible)

• Fireplace Surround Material (noncombustible)

• Piping Complying with Local Codes

• Pipe Sealant Approved for use with Propane/LPG

(Resistant to sulfur compounds)

• Noncombustible nishing material or dura-rock*

* Only used if desired to cover painted face other than using tiles or
marble. If tiles or marble are used around the face, the noncombustible
material is not needed.

FIREBOX FRAMING

Firebox framing can be built before or after the appliance
is set in place. Refer to Figure 2 for replace and framing
dimensions. The framing headers may rest on the top of

the rebox standoffs. Do not bring headers below top of

standoffs. NOTE: When planning your framing and instal­lation, keep in mind that your gas line can come in on the

right or left side of the rebox (as you are facing it) and

your electricity will come in on the right side.

The rebox may be installed directly on a combustible oor

or raised on a platform of an appropriate height. When

the rebox is installed directly on carpeting, tile, or other
combustible material, other than wood ooring, the rebox

shall be installed on a metal or wood panel extending the
full width and depth of the enclosure.

20306746

5

WDV See-thru Gas Fireplace

FIREPLACE AND FRAMING DIMENSIONS

PRE-INSTALLATION INFORMATION

1/2" or
5/8"

Min. Rough
Opening
Height

38½"

(978 mm)

8⁄"

(221 mm)

25¾" (654 mm)

Min. Rough Opening Width

(51¾" (1314 mm)

36⁄"

(918 mm)

13¾" (349 mm)

40" (1016 mm)

51¼" (1302 mm)

17⁄"

(441 mm)

Required Noncombustible
Material Area

6"

(152 mm)

17⁄"

(454 mm)

(751 mm)

5¾"

(146 mm)

37⁄"

(956 mm)

29⁄"

1½"

(38 mm)

38⁄"

(975 mm)

7⁄"

(195 mm)

Figure 1 ­Fireplace & Framing Dimensions

Unit framing is to be rectangular front to
back. Failure to do so will cause re and
damage to property.

WARNING

Do not fill spaces around firebox with
insulation or other materials. This could
cause a re.

WARNING

6

20306746

PRE-INSTALLATION INFORMATION

FIREPLACE LOCATION

Plan for the installation of your appliance. This includes
determining where the unit is to be installed, the vent con-

guration to be used, framing and nishing details, and

whether any optional accessories (i.e. blower, wall switch,
or remote control) are desired. Consult your local building
code agency to ensure compliance with local codes, includ­ing permits and inspections.

The following factors should be taken into consideration:

• Clearance to side-wall, ceiling, woodwork, and windows.

Minimum clearances to combustibles must be main-

tained.

• This replace may be installed as a room divider or an

island. See Figure 3 for suggested locations.

• Location should be out of high trafc areas and away

from furniture and draperies due to heat from appli­ance.

• Never obstruct the openings of the replace.

• Do not install in the vicinity where gasoline or other

ammable liquids may be stored.

• Vent pipe routing. See Venting section found in this

manual for allowable venting congurations.

• These units can be installed in a bedroom. Refer to the

National Fuel Gas Code ANSI Z233.1/NFPA 54 — (cur-

rent edition), the Uniform Mechanical Code — (current
edition), and Local Building Codes for specic installa-

tion requirements.

• These units can be installed in a bathroom.

WDV See-thru Gas Fireplace

A

B

Y

A Island**
B Room Divider*
Y 4" Minimum

** Island (A) and room divider (B) installation is possible as long

as the horizontal portion of vent system (X) does not exceed

20'. Refer to Installing Horizontal Termination Conguration
on Page 12.

* When you install your replace in (B) room divider, a minimum

of 6" clearance must be maintained from perpendicular wall

and front of replace.

Figure 3 ­Possible Fireplace Locations

X

COLD CLIMATE INSULATION

If you live in a cold climate, seal all cracks
around your appliance, and wherever cold air
could enter the room, with noncombustible

material. It is especially important to insulate

NOTE

the outside chase cavity between the studs
and under the oor on which the appliance
rests, if the oor is above ground level.

NOTE: Refer to cold climate pilot information on Page 33
for more information on standing pilot vs. intermittent pilot
options.

20306746

7

WDV See-thru Gas Fireplace

6”

5”

3”

4¹⁄₂”

45°

1”

3¹⁄₂”

1¹⁄₂”

2¹⁄₂”

CLEARANCES TO COMBUSTIBLES

PRE-INSTALLATION INFORMATION

Follow these instructions carefully to
ensure safe installation. Failure to follow
instructions exactly can create a fire

hazard.

The appliance cannot be installed on a
carpet, tile or other combustible material
other than wood ooring. If installed on

WARNING

carpet or vinyl flooring, the appliance

shall be installed on a metal, wood or
noncombustible material panel extending
full width and depth of the appliance.

54” (1372 mm)

Minimum

Ceiling

12” (305 mm)

Max. Depth

Wall

12" (305 mm)

12"

(305 mm)

Top of Fireplace
Opening

6" (152 mm)

9"

(229 mm)

Stud

Insulation
Board

Standoff

2¹⁄₂"

(64 mm)

6"

(152 mm)

FP2745

Side View

6”

FP2421

Figure 4 ­Ceiling and Sidewall Clearances for

Both Sides of Fireplace

(152 mm)

Min.

Min. to Combustibles

5³⁄₄” (146 mm)

Side of Fire­place Opening

1

2

/2” (64 mm)

Max Depth

12” (305 mm) Min.

From Opening

6” (152 mm)

Min. From

Opening

MANTEL CLEARANCES

NOTE: The combustible area above the facing must
not protrude more than 3⁄4" from the facing. If it does,
it is considered a mantel and must meet the mantel
requirements listed in this manual.

Top View

FP2746

Figure 5 ­Mantel clearances

8

20306746

PRE-INSTALLATION INFORMATION

SECURE THE FIREPLACE

The replace must be secured to the oor and/or to framing
studs as shown in Figure 6. Use two (2) wood screws or
masonry/ concrete screws to secure replace to the oor.
Use four (4) screws to attach replace to framing. The side
nailing anges are 1⁄2" or 5⁄8" to accommodate different wall

thickness.

Noncombustible Material

Framing Members

6”

Nailing Flange

WDV See-thru Gas Fireplace

Never install combustible materials over
front face of replace.

NOTE

Screws

Nailing Flange

Screws

Figure 6 ­Secure Fireplace to Framing Studs

NOTE: Fireplace may be installed on top of framing or
platform constructed of combustible materials which do
not protrude beyond the face.

Nailing Flange

FP2747

FINISHING MATERIAL

NOTE: Any remote wiring (i.e. remote control, wall switch,

and optional fan) must be done prior to nal nishing to

avoid costly reconstruction.

Only noncombustible materials (i.e. brick, tile, slate, steel,

or other materials with a UL re rating of Zero) may be

used to cover the black painted face of the appliance. It is
permissible to bring combustible wall board to the top of
the standoffs on the top and to the wall board stand-offs
on the sides of the unit. A 300°F minimum adhesive may
be used to attach facing materials to the black surface. If

joints between the nished wall and the replace surround

are sealed, a 300°F minimum sealant material (General
Electric RTV103 or equivalent) must be used.

20306746

9

WDV See-thru Gas Fireplace

Read all instructions completely and
thoroughly before attempting installation.
Failure to do so could result in serious injury,
property damage or loss of life. Operation
of improperly installed and maintained

WARNING

venting system could result in serious injury,
property damage or loss of life.

INSTALLATION PRECAUTIONS

Consult local building codes before beginning
the installation. The installer must make sure to
select the proper vent system for installation. The
approved 5 x 8 venting components are Simpson
Duravent and Selkirk products listed on Page 49.

UL1777 exible venting is also approved for use

on these models. Before installing vent kit, the

installer must read this replace manual and

vent kit instructions.

Only a qualified installer/service person
should install venting system. The installer
must follow these safety rules:

50” (1270 mm)

Min. Floor

to Center of

Vent Pipe

**1”

(25 mm)

**1”

(25 mm)

* A minimum of 3" clearance to the top is

required along horizontal length until ue

pipe penetrates outside wall.

*3” (76 mm)

** A minimum 1" clearance to combustibles

permitted all around ue at outside wall

VENT INSTALLATION

12" (305 mm) Vertical
Rise Required Before

Horizontal Run

• Wear gloves and safety glasses for protec-

tion.

• Use extreme caution when using ladders

or when on rooftops.

• Be aware of electrical wiring locations in

walls and ceilings.

The following actions will void the warranty on your vent­ing system:

• Installation of any damaged venting component.

• Unauthorized modication of the venting system.

• Installation of any component part not manufactured

or approved by Vermont Castings Group.

• Installation other than permitted by these instruc-

tions.

Failure to follow these instructions will void

the warranty.

NOTICE

This replace must be vented to the outside.
The venting system must NEVER be attached
to a chimney serving a separate solid fuel
burning appliance. Each gas appliance must

use a separate vent system. Do not use

WARNING

common vent systems.

Figure 7 ­Combustible Clearances for Vent Pipe

FP2748

Horizontal sections of this vent system
require a minimum of 3" clearances to
combustibles at the top of the ue and 1"
clearance at the sides and bottom until the

ue penetrates the outside wall. A minimum

1" clearance all around the ue is acceptable

at this point of penetration. Unless the

WARNING

vertical run is 71⁄2' or higher from oor of

replace, the clearance for horizontal run is
1" on all sides.

10

20306746

VENT INSTALLATION

INSTALLATION PLANNING

There are two basic types of direct-vent installation:

• Horizontal Termination

• Vertical Termination

It is important to select the proper length of vent pipe for
the type of termination you choose. It is also important to
note the wall thickness.

HORIZONTAL TERMINATION

Select the amount of vertical rise desired. All horizontal

run of venting must have 1⁄4" (6 mm) rise for every 12" (305
mm) of run towards the termination below 71⁄2 feet (2.3 m) of

vertical rise from the oor of the replace. With 71⁄2 feet (2.3
m) or more vertical rise from the oor of the replace, the
horizontal run may run level. NEVER run vent piping down.

Horizontal venting which incorporates the twist lock pipe

must be installed on a level plane without an inclining or
declining slope.

You may use up to three 90° elbows in this vent congura­tion. Refer to Vertical/Horizontal Termination Congurations

on Page 15.

FOR VERTICAL TERMINATION

Measure the distance from the replace oor to the ceil­ing. Add the ceiling thickness, the vertical rise in an attic

or second story, and allow for sufcient vent height above

the roof line.

WDV See-thru Gas Fireplace

Never run the vent pipe level down. This

may cause excessive temperatures which

could cause a re.

WARNING

NOTE: You may use two 45° elbows in place of a 90° elbow.

You must follow rise to run ratios when using 45° elbows.
The appliance is approved for use with three 90° elbows
maximum or a combination of 90° and 45° elbows up to
a maximum of 270°.

For two-story applications, restops are required at each
oor level. If an offset is needed in the attic, additional pipe

and elbows will be required.

You may use a chase with a vent termination with exposed
pipe on the exterior of the house.

Refer to Installing A Vent System in an Outside Chase
below. If pipe is enclosed in chase, it is not exposed.

It is very important that the venting system maintain its bal-

ance between the combustion air intake and the ue gas
exhaust. Certain limitations apply to vent congurations

and must be strictly followed.

INSTALLING A VENT SYSTEM IN AN
OUTSIDE CHASE

A chase is a vertical boxlike structure built to enclose
venting that runs along the outside of a building. A chase
is required for such venting.

When installing in a chase, you should
insulate the chase as you would the outside

walls of your home. This is especially

important in cold climates. Insulation
should be considered a combustible

NOTICE

material. Maintain proper clearances to all

combustible materials.

Treatment of restops and construction of
the chase may vary from building type to
building type. These instructions are not
substitutes for the requirements of local

NOTICE

building codes. You must follow all local
building codes.

Always maintain minimum clearances around

vent systems. The minimum clearances to

combustibles for horizontal and vertical vent
pipe are 1" (25 mm) at the top, sides and bottom
of the vent system. Do not pack the open air

spaces with insulation or other materials. This

WARNING

could cause high temperatures and may present
a re hazard.

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11

WDV See-thru Gas Fireplace

V

X

X

X

D

E

B

B

B

C

B

M

B

A

J

K

F

L

VENT TERMINATION AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

H

I

Fixed

Closed

Operable

Operable

Fixed

Closed

B

INSIDE

CORNER DETAIL

A

G

CFM145a

V

V

V

V

V

V

V

V

TERMINATION LOCATION

Figure 15 –
Termination Locations

VENT INSTALLATION

A = Clearance above grade, veranda, porch,

CANADIAN INSTALLATIONS

1

12" (30cm) 12" (30cm)

US INSTALLATIONS

2

deck or balcony

B = Clearance to window or door that may be

opened

C = Clearance to permanently closed window 12" (305mm) recommended to prevent

D = Vertical clearance to ventilated soft

6" (15cm) for appliances <10,000 BTU/h

(3kW)

12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h

(30kW)

6" (15cm) for appliances <10,000 BTU/h

(3kW)

9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h

(15kW)

12" (305mm) recommended to prevent

window condensation

window condensation

18" (458mm) 18" (458mm)

located above the terminal within a hor-

izontal distance of 2' (610 mm) from the

center line of the terminal

E = Clearance to unventilated soft 12" (305mm) 12" (305mm)

F = Clearance to outside corner see next page see next page

G = Clearance to inside corner see next page see next page

H = Clearance to each inside of center line

extended above meter/regulator assembly

3' (91cm) within a height of 15' (5m) above
the meter/regulator assembly

3' (91cm) within a height of 15' (5m) above
the meter/regulator assembly

I = Clearance to service regulator vent outlet 3' (91cm) 3' (91cm)

J = Clearance to non-mechanical air supply

inlet to building or the combustion air inlet
to any other appliance

6" (15cm) for appliances <10,000 BTU/h

(3kW)

12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h

(30kW)

6" (15cm) for appliances <10,000 BTU/h

(3kW)

9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h

(15kW)

K = Clearance to mechanical air supply inlet 6' (1.83m) 3' (91cm) above if within 10' (3m) horizontally

L = Clearance above paved sidewalk or

7' (2.13m)

†

7' (2.13m)

†

paved driveway located on public property

M = Clearance under veranda, porch, deck or

12" (30cm)

‡

12" (30cm)

‡

balcony

1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel

Gas Codes

† 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 2 sides beneath the oor.

12

NOTE: 1. Local codes or regulations may require different

2. The special venting system used on Direct Vent

3. Vermont Castings Group assumes no responsibility for

clearances.

Fireplaces are certied as part of the appliance, with

clearances tested and approved by the listing agency.

the improper performance of the appliance when the venting
system does not meet these requirements.

20306746

Termination Clearances

VENT INSTALLATION

WDV See-thru Gas Fireplace

Figure 9 ­Termination
Clearances

*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specied for vinyl or
non-vinyl siding and softs. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All mechanical air intakes within 10’ (1 m) of a

termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All gravity air intakes within 3’ (914 mm) of a termination cap must
be a minimum of 1’ (305 mm) below the termination cap.

HOW TO USE THE VENT GRAPH

The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the

relationship between the vertical and horizontal dimensions

of the vent system.

1. Determine the height of the center of the horizontal vent

pipe exiting through the outer wall. Using this dimen-

sion on the Sidewall Vent Graph below, locate the point
intersecting with the slanted graph line.

2. From the point of this intersection, draw a vertical line

to the bottom of the graph.

3. Select the indicated dimension, and position the re-

place in accordance with same.

Example: If the vertical dimension from the oor of the

replace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 16' (4.9 m).

Sidewall Vent Graph showing the relationship between

vertical and horizontal dimensions for a Direct Vent ue

system.

Termination clearances for buildings with combustible and noncombustible exteriors.

Inside Corner

G

V

Balcony -
with no side wall

M =

Combustible &
Noncombustible
12" (305 mm)

G =

Combustible
6" (152 mm)

Noncombustible
2" (51 mm)

M

V

Outside Corner

F =

Combustible
6" (152 mm)

F

V

Noncombustible
2" (51 mm)

P

V

Balcony -
with perpendicular side wall

M

Combustible &
Noncombustible

M = 12" (305 mm)
P = 6” (152 mm)

Alcove Applications*

No.

of Caps DMin. CMax.
1 3’ (914 mm) 2 x DActual
2 6’ (1.8 m) 1 x DActual
3 9’ (2.7 m) 2⁄3 x DActual
4 12’ (3.7 m) 1⁄2 x DActual

DMin. = # of Termination caps x 3
CMax. = (2 / # termination caps) x DActual

40
38
36
34
32
30
28
26

Dimensions in Feet

24
22
20

50" (1270 mm)
From Floor to
Center

18
16
14
12
10

8
6
4
2

2 4 6 8 10 12 14 16 18 20

Figure 10 ­Rear Wall Venting Graph
(No Horizontal Elbows)

Horizontal dimension from the nished outside

wall to the center of the pipe on the replace

D

C

V

O

E = Min. 2” (51 mm) for

non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls

O = 8’ (2.4 m) Min.

C

E

584-15

Vertical Dimension From the Floor of Unit to the

Center of the Horizontal Vent Pipe

eg: A

20306746

13

WDV See-thru Gas Fireplace

X

X

VERTICAL SIDEWALL INSTALLATION

NOTE: Sealant is not required to assemble replace
venting. Do not use silicone sealant at the inner ue

exhaust connections.

Step 1

Locate vent opening on the wall. It may be necessary to
rst position the replace and measure to obtain hole lo­cation. Depending on whether the wall is combustible or

noncombustible, cut opening to size. Figure 11 (For com-
bustible walls rst frame in opening.)

Combustible Walls: Cut a 101⁄2"H x 101⁄2"W (267 x 267
mm) hole through the exterior wall and frame as shown.

Figure 11

Noncombustible Walls: Hole opening must be 81⁄2" (216
mm) in diameter.

Vent Opening for Combustible Walls

101⁄2"

(267 mm) Min.

101⁄2"

(267 mm)

Min.

VENT INSTALLATION

X

Figure 12 ­Vertical Height
Requirement

FP1384

Always install horizontal venting on a level

plane.

Step 6

Use appropriate length of pipe sections - telescopic or
xed - and install.

X

Fireplace Hearth

Framing Detail

Opening for Noncombustible Wall

81⁄2"

(216 mm)

Figure 11 -
Locate vent opening on wall

Fireplace Hearth

FP2293

Step 2

Secure restop to the inside frame, center in the 101⁄2" x
101⁄2" (267 x 267 mm) vent opening.

Step 3

Place replace into position. Measure the vertical height
(X) required from the base of the ue collars to the center

of the wall opening. Figure 12

Step 4

Using appropriate length of pipe section(s) attach to re­place with three (3) screws. Follow with the installation of
the elbow.

Step 5

Measure the horizontal length requirement guring a 11⁄4"

(32 mm) overlap, i.e. from the elbow to the outside wall
cap. Figure 13

Figure 13 ­Horizontal Length
Requirement

FP1385

Sealing vent pipe and restop gaps with high tem­perature sealant will restrict cold air being drawn in
around replace.

Step 7

Guide the vent terminations 5" and 8" collard into their
respective vent pipes. Double check that the vent pipes
overlap the collars by a minimum 11⁄4" (32 mm). Secure
the termination to the wall with screws provided and caulk
around the wall plate to weatherproof. As an alternative to
screwing the termination directly to the wall, you may also
use expanding plugs or an approved exterior construction

adhesive.

Support horizontal pipes every 36" (914

mm) with metal pipe straps.

14

20306746

VENT INSTALLATION

VERTICAL/HORIZONTAL TERMINATION
CONFIGURATIONS

Since it is very important that the venting system main-

tain its balance between the combustion air intake and
the ue gas exhaust, certain limitations as to vent con­gurations apply and must be strictly adhered to.

The Vent Graph, showing the relationship between vertical

and horizontal side wall venting, will help to determine the

various dimensions allowable. Figure 10

NOTE: Horizontal and vertical sections of this vent system

require a minimum of 1" clearance to combustibles at the
top, sides and bottom.

When vent exits through foundations less than 20" (508

mm) below outcrop, the termination must be ush up with

outcropped wall above.

It is best to locate the replace in such a way that minimizes
the number of offsets and horizontal vent length.

The horizontal vent run refers to the total length of vent
pipe from the ue collar of the replace (or the top of the
Transition Elbow) to the face of the nished outside wall.

WDV See-thru Gas Fireplace

Max. 36"
(914mm)

12" Min.

Figure 15 ­Maximum Horizontal Run with No Rise

FP1381

In Figures 16 and 17 dimension A plus B must not be
greater than 17' (5.2 m).

• For each 45° elbow installed in the horizontal run, the

length of the horizontal run MUST be reduced by 18" (45

cm). This does not apply if the 45° elbows are installed
on the vertical part of the vent system.

• The maximum number of elbow degrees in a system is

270°. Figure 17

• The maximum number of 90° elbows per side wall

installation is three (3). Figure 14

• A minimum of 12" (305 mm) is required before a 90°

elbow. If a 90° elbow is tted directly after 12" (305 mm)
vertical section mounted to the top of the replace, the
maximum horizontal vent run before the termination or

a vertical rise is 36" (914 mm). Figure 15

3 x 90°
Elbows

12"

(305 mm)

Min.

FP1380

Figure 14 ­Maximum Three (3) 90° Elbows Per Installation

• If a 90° elbow is used in the horizontal vent run (level

height maintained) the horizontal vent length is reduced

by 36" (914 mm). Figures 16 and 17. This does not
apply if the 90° elbows are used to increase or redirect
a vertical rise.

Example: According to the vent graph (Page 13) the max-

imum horizontal vent length in a system with a 10' vertical

rise is 171⁄2’ (5.3 m) and if a 90° elbow is required in the

horizontal vent it must be reduced to 141⁄2' (4.4 m).

90° Elbow = 36" (914
mm) Reduction

A

Figure 16 ­Horizontal Run Reduction

B

10’

FP2749

20306746

15

WDV See-thru Gas Fireplace

1

2

3

4

VENT INSTALLATION

Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°

1

2

3

4

12"
Minimum

Figure 17 ­Maximum Elbow Usage

FP1383

BELOW GRADE INSTALLATIONS

When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is recom­mended. It allows installation depth down to 7" (178 mm)
below grade level. The 7" (178 mm) is measured from the

center of the horizontal vent pipe as it penetrates through

the wall.

Ensure that sidewall venting clearances are observed.
If venting system is installed below ground, we recom­mend a window well with adequate and proper drainage
to be installed around the termination area.

If installing a snorkel, a minimum 12" vertical rise is neces-

sary. The maximum horizontal run with the 12" vertical pipe

is 36". This measurement is taken from the collar of the

replace (or transition elbow) to the face of the exterior wall.
See the Sidewall Venting Graph for extended horizontal

run if the vertical exceeds 12".

1. Establish vent hole through the wall.

2. Remove soil to a depth of approximately 16" below base
of snorkel. Install drain pipe. Install window well (not

supplied). Rell hole with 12" of coarse gravel leaving

a clearance of approximately 4" below snorkel. Figure
18

3. Install vent system.

4. Ensure a watertight seal is made around the vent pipe
coming through the wall.

5. Apply high temperature sealant caulking (supplied)
around the 5" and 8" snorkel collars.

6. Slide the snorkel into the vent pipes and secure to the
wall.

7. Level the soil so as to maintain a 4" clearance below
snorkel. Figure 18

Screws

Firestop

12"

(305 mm)

Minimum

Minimum
4" (102 mm)
Clearance

Ground

Window
Well

Gravel

Drain

16

Foundation Wall

Figure 18 -

FP2134

Below Grade Installation

If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten

brackets to wall rst, then secure to snorkel with self drilling

#8 x 1⁄2" sheet metal screws. It will be necessary to extend
vent pipes out as far as the protruding wall face. Figure 19

20306746