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Homeowner’s

Installation and

Operating Manual

SAFETY NOTICE: IF THIS APPLIANCE IS NOT PROPERLY INSTALLED, OPERATED AND MAIN-

TAINED, A HOUSE FIRE MAY RESULT.

TO REDUCE THE RISK OF FIRE, FOLLOW THE INSTALLATION INSTRUCTIONS. FAILURE TO

FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN

DEATH. CONTACT LOCAL BUILDING OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION

INSPECTION REQUIREMENTS IN YOUR AREA.

Do Not Discard This Manual: Retain for Future Use

2000941 3/07 Rev. 17

WinterWarm

Fireplace Insert

or System

For Use in North America

0941

Winter Warm Cover

3/01

2

WinterWarm Fireplace Insert or System

2000941

Introduction

Thank you for purchasing a Vermont Castings’ WinterWarm, an efficient fireplace carefully engineered to bring you the

latest in wood combustion principles and modern foundry technology.

The WinterWarm masonry Fireplace Insert turns a traditional masonry fireplace into a powerful heater; the Winter-

Warm Fireplace System combines an insulated metal cabinet with the Fireplace Insert so that it may be installed in

close-clearance situations where no masonry fireplace and chimney exists.

Whichever you have purchased, you can count on years of comfortable heating and pleasureable fire viewing if you

treat it properly and operate it according to the directions in this owner’s guide.

The WinterWarm Fireplace Insert, and the WinterWarm Fireplace System that utilizes the WinterWarm Fireplace

Insert, are listed by Underwriter’s Laboratories of Canada, and are in compliance with the standards set forth by the

Federal Environmental Protection Agency, 40 CFR Part 60.532(b), as stated on the permanent label attached to each

appliance.

This manual describes the installation and operation of the WinterWarm catalytic-equipped wood heater. This heater

meets the U.S. Environmental Protection Agency’s emission limits for wood heaters sold after July 1, 1990. Under

specific test conditions this heater has been shown to deliver heat at a rate ranging from 10,300 to 30,000 Btu’s/hr.

For more complete details on WinterWarm performance and specifications, please refer to page 3.

The WinterWarm is designed, tested and listed for burning wood. Do not burn other fuels.

We recommend that you hire a professional installer certified by Wood Energy Technical Training (WETT) to install

your WinterWarm, or to advise you on the installation should you attempt to install it yourself.

Please read the appropriate sections of this manual before you install and use your WinterWarm. For information on

the installation of a WinterWarm into a masonry fireplace, read Sections III and V. To learn how to install the Winter-

Warm and its Cabinet that make up the fireplace system, read Sections IV and V. For information on Operation and

Maintenance of the WinterWarm, read Sections I and II.

Failure to follow instructions may result in property damage, bodily injury or even death.

Save These Instructions For Future Reference

Before you begin, here’s a timesaving tip

on using this manual.

• To learn how to operate and maintain the Winter-

Warm, read Sections I and II.

• To install a WinterWarm Fireplace Insert into a

masonry fireplace, read Sections III and V.

• To install a WinterWarm Fireplace System, read

Sections IV and V.

Table of Contents

Introduction .................................................... 2

Specifications ................................................ 3

Operation ....................................................... 4

Maintenance .................................................. 9

Preparing a Masonry Chimney .................... 16

Installing the Fireplace System Cabinet ...... 21

Appendices .................................................. 38

Proposition 65 Warning: Fuels used in gas, wood-

burning or oil fired appliances, and the products of

combustion of such fuels, contain chemicals known

to the State of California to cause cancer, birth de-

fects and other reproductive harm.

California Health & Safety Code Sec. 25249.6

3

WinterWarm Fireplace Insert or System

2000941

Specifications

Range of heat output* ............. 10,300 - 30,000 BTU/hr

Maximum heat output** ..........................50,000 BTU/hr

Area heated*** ................ Up to 1500 sq. ft. (140sq. m)

Size of wood splits ....................... 20-24” (508-610 mm)

Fuel Capacity .......................................... 40lbs. (18 kg)

Loading ..................................................................Front

Flue size .................................................... 8” (203 mm)

Fireplace Insert weight ........................ 475lbs. (216 kg)

Fireplace System weight ..................... 840lbs. (380 kg)

Primary Air Control ........................Manual/thermostatic

Secondary Air Control ............................Self-regulating

Glass panel ......................... High-temperature ceramic

Flue exit position ..................................................... Top

Blower rating ...............................106cfm. (115V, 60Hz)

*Under specific test conditions used during EPA emis-

sions standard testing.

**This value can vary depending on how the unit is

operated, and the type and moisture content of the fuel

used. Figure shown is based on maximum fuel con-

sumption obtained under laboratory conditions and on

average efficiencies.

***These values are based on operation in building-

code conforming homes under typical winter climate

conditions in New England. If your home is of nonstan-

dard construction (e.g. unusually well insulated, not in-

sulated, built under ground, etc.) or if you live in a more

severe or more temperate climate, these figures may

not apply. Since so many variables affect performance,

consult your Vermont Castings’ Authorized Dealer to

determine realistic expectations for your home.

WinterWarm

37"

(959 mm)

26"

(676 mm)

8" (203 mm)

12"

(327 mm)

12"

(327 mm)

15"

(394 mm)

4"

(121 mm)

21"

(553 mm)

6"

(172 mm)

7"

(200 mm)

36"

(914 mm)

7" (191 mm)

29"

(759 mm)

25"

(648 mm)

41"

(1041 mm)

0941

Winter Warm

Specs

3/27/01 djt

13"

(349 mm)

7"

(200 mm)

15"

(403 mm)

23"

(603 mm)

18" (470 mm)

33” (838 mm)

Top View / System Cabinet

Fig. 1 WinterWarm dimensions.

4

WinterWarm Fireplace Insert or System

2000941

Section I Operation

Your WinterWarm’s Controls

and What They Do

Three controls regulate the performance of your Win-

terWarm: A primary air control supplies oxygen for the

fire, a damper directs air flow within the fireplace, and

a variable-speed fan control, or rheostat, regulates the

warm air flow into the room. (Fig. 2)

Primary Air Control

A single air control regulates the amount of heat the fire

will produce and how long it will burn.

The primary air control is located above the upper left

corner of the door. It is the top-most of the two brass-

capped controls located there (the brass knob on the

bottom regulates the fan), and is the primary source of

air for starting, maintaining, and reviving the fire.

Generally, more air entering the stove makes the fire

burn hotter and faster, while less air prolongs the burn.

The WinterWarm’s air supply is open to the maximum

when the control lever is moved to the left, and closed

when moved to the far right. It may be set anywhere

between the two extremes, however, depending on the

amount of heat desired.

To complement the manual setting of the air control, the

WinterWarm has an internal automatic thermostat that

ensures an even delivery of heat at the manual setting

you select.

The Damper

The damper directs air flow within the fireplace.

The damper is operated by moving the lever located

above the upper right corner of the door. It has two

positions: Open, to start or revive the fire (Fig. 3); and

closed (Fig. 4), for normal operation. The damper is

open when the lever is to the far left, and closed when

to the far right. There are no intermediate settings for

damper position.

When the damper is closed, the front door automatically

locks to prevent the door being inadvertently opened

when the fireplace is in its catalytic mode. This could

cause smoke to spill into the room.

To open the damper, lift up on the lever and move it

to the far left. The lock will disengage, allowing you to

open the front door.

To close the damper, move the lever to the right,

continuing past the resistance to lock the damper in

position. (The door handle must be positioned vertically

before the lock mechanism will engage.)

FP1070

Winter Warm Controls

3/01

Primary Air Control (Top Lever)

Fan Speed Control

(Rheostat) (Bottom

Lever) Damper Control

Door Handle

Optional Outside

Air Control

FP1070

Fig. 2 All WinterWarm controls are located conveniently on

the front.

FP1072

WW 

damper closed

3/27/01 djt

Damper Closed

Catalytic

Combustor

FP1072

Fig. 4 Damper is closed: Smoke is channelled through the

catalytic combustor where much of it can be burned.

FP1071

WW 

damper open

3/27/01 djt

Damper

Open

FP1071

Fig. 3 The damper is open; Smoke is vented directly to the

chimney.

5

WinterWarm Fireplace Insert or System

2000941

The Fans

Two fans deliver a steady stream of warm air.

Heated air from your WinterWarm is forced into the

room by two internal fans. The control for the fans is

below the brass primary air control knob, just above the

upper left corner of the door. (Fig. 5)

“Off” is to the far left.

“High” is just to the right of “Off.”

“Low” is to the far right.

Variable adjustment of the fans is possible with any set-

ting between “high” and “low.”

For best results, coordinate fan speed with the setting

of your thermostat. For example, when the thermostat

lever is set at “low,” also set the fans at “low.” With the

thermostat set for maximum heat, set the fans at “high.”

FP1073

Winter Warm 

fan/air settings

3/27/01 djt

Air Control Lever,

High Air Setting

Medium Low Air Setting

Fan Control

Lever (Fan Off) Fan On

FP1073

Fig. 5 Variable settings for both the fans and the air control

are possible between the two extreme settings.

Burn Only High-Quality Wood

The WinterWarm is designed to burn natural wood

only; do not burn fuels other than that for which it was

designed.

You’ll enjoy the best results when burning wood that

has been adequately air-dried. Avoid burning “green”

wood that has not been properly seasoned.

The best hardwood fuels include oak, maple, beech,

ash, and hickory that has been split, stacked, and air-

dried outside under cover for at least one year.

For areas that do not have a supply of hardwood, com-

monly burned softwoods include tamarack, yellow pine,

white pine, Eastern red cedar, fir, and redwood. These

too should be properly dried. Your WinterWarm will

accept wood up to 24” (610mm). Longer wood pieces

work better than short ones.

Wood should be stored under cover to maintain dry-

ness, and should be dried at least six months for

optimum heating and fire-viewing performance. Even

for short-term storage, however, keep wood a safe

distance from the heater and keep it out of the areas

around the heater used for refueling and ash removal.

Use the Air Control Settings

that Work Best for You

No single air control setting will fit every situation. Each

installation will differ depending on the quality of the

fuel, the amount of heat desired, and how long you wish

the fire to burn.

The control setting also depends on your particular

installation’s “draft,” or the force that moves air from the

stove up through the chimney. Draft is affected by such

things as the length, type, and location of the chimney,

local geography, nearby obstructions, and other factors.

Too much draft may cause excessive temperatures in

the WinterWarm, and could even damage the com-

bustor. On the other hand, too little draft can cause

backpuffing into the room and/or the “plugging” of the

chimney or combustor.

How do you know if your draft is excessively high or

low? Symptoms of too much draft include an uncon-

trollable burn or a glowing-red part of the WinterWarm

front. A sign of inadequate draft is smoke leaking into

the room through the stove or chimney connector joints,

low heat, and dirty glass.

In some newer homes that are well-insulated and

weather-tight, poor draft may result from insufficient air

in the house. In such instances, an open window near

the stove on the windward side of the house will provide

the fresh air needed.

Another option for getting more combustion air to the

stove is to duct air directly from the outside to the stove.

In fact, in some areas provisions for outside combustion

air are required in all new construction.

Your WinterWarm is designed so that it is possible to

incorporate outside air for combustion. Directions for

installing the optional outside air duct may be found

beginning with Step 4 on Page 31.

When first using the stove, keep track of the settings

of the air controls. You will quickly find that a specific

setting will give you a fixed amount of heat. It may take

a week or two to determine the amount of heat and the

length of burn you should expect from various settings.

Most installations do not require a large amount of

combustion air, especially if adequate draft is available.

Do not for any reason attempt to increase the firing

of your heater by altering the air control adjustment

range outlined in these directions.

6

WinterWarm Fireplace Insert or System

2000941

Use the following air control settings as a starting point

to help determine the best settings for your installation.

Each is described as a fraction of the total distance the

lever may be moved from right to left.

WinterWarm Control Settings

Burn Rate Primary Air Control

Low From far right to 1/3

the distance to left

Medium From 1/3 to 2/3 the distance

to left

High From 2/3 the distance

to left to far left

How To Build a Wood Fire and

Keep It Going

A WinterWarm leaves the factory with the combustor

installed.

In the United States, it is against the law to operate this

wood heater in a manner inconsistent with operating

instructions in this manual, or if the catalytic combustor

is deactivated or removed.

High-Efficiency Wood Burning

with Catalytic Combustion

The components of the catalytic combustion system in

your WinterWarm work together to produce optimum

conditions for secondary combustion.

When the damper is closed, smoke is directed through

the catalytic element, which causes ignition of smoke

at temperatures of 500-600°F (260-315°C), half the

temperature normally required for unaided secondary

combustion.

The catalytic element is a ceramic “honeycomb” coated

with the catalytic material. The element is located in

the secondary combustion chamber, molded from a

special high-temperature insulating refractory mate-

rial. The design of the chamber provides the correct

environment necessary for secondary combustion of

the fuel (smoke).

Catalytic combustion is activated by closing the damp-

er, thereby exposing the smoke to the combustor.

Closing the stove damper may also reduce the draft, so

to avoid putting out the fire or deactivating the combus-

tor, close the damper only when a fire is well-estab-

lished. When starting a fire, wait until the fire is well

established and there is an ember bed of at least 3-4”

(76 - 102mm) before closing the damper.

Never kindle a fire with colored paper or paper that

has colored ink or a glossy surface, and never burn

treated wood, garbage, solvents, or trash. All of these

may poison the catalyst and prevent it from operating

properly. Never burn cardboard or loose paper except

for kindling purposes. Never burn coal; doing so can

produce soot or large flakes of char or fly ash that can

coat the combustor and cause smoke to spill into the

room. Coal smoke also can poison the catalyst so that it

won’t operate properly.

In general, the fire must be sufficiently well-established

to ensure that catalytic activity is initiated. When first

starting a fire, a medium- to high- firing rate must be

maintained for at least twenty minutes. This ensures

that the stove, catalyst, and fuel are all stabilized at the

proper operating temperatures.

Even though it is possible for the fire to get quite hot

within a few minutes after a fire is started, the combus-

tor may stop working or the fire may go out if the fire

is allowed to die down immediately as a result of the

damper being closed. Once the combustor starts work-

ing, heat generated by burning the smoke will keep it

working.

To determine whether the combustor is operating, ob-

serve the amount of smoke leaving the chimney when

the damper is activated and when it is not. This proce-

dure is described on Page 12.

Starting and Maintaining a Wood Fire

Burn solid wood fuel only in the WinterWarm, and

burn it directly on the grate. Do not elevate the fuel.

Do not burn coal or other fuels.

Cast iron is a superior material for solid fuel stoves but

it must be treated with respect. It is extremely strong,

but can be broken with a sharp blow from a hammer or

from the thermal shock of rapid and extreme tempera-

ture changes.

The cast plates expand and contract with changes in

temperature. Minimize thermal stress by allowing the

plates to adjust gradually during an initial break-in fire

by following Steps 1-3 below.

Always be certain that the damper is open when start-

ing a fire or when refueling. This rule is easy to re-

member, as the WinterWarm’s integrated door/damper

interlock design does not permit opening the door unless

the damper is already open. To open the damper, lift up

on the lever and move it to the left. (Fig. 6)

WARNING: Operate your WinterWarm only with

the door fully closed and either the glass panel or

spark screen in place. If the door is left partially

open, gas and flame may be drawn out of the

fireplace opening, creating risks of both fire and

smoke.

7

WinterWarm Fireplace Insert or System

2000941

FP1074

Winter Warm 

damper settings

3/27/01 djt

Open Closed

Damper Control Lever

FP1074

Fig. 10 When the damper is closed, the front door automati-

cally locks to prevent opening while a fire is burning.

1. Open the stove damper, and open the primary air

control fully.

2. Lay some crumpled newspapers on the bottom

grate. Place on the paper six or eight pieces of dry,

finely-split kindling. On the kindling lay two or three

larger sticks of split dry wood approximately 1-2”

(25-51mm).

Do not use chemicals or fluids to start the fire. Do

not burn garbage or flammable fluids such as gaso-

line, naptha, or engine oil.

Also, never use gasoline-type lantern fuel, kerosene,

charcoal lighter fluid, or similar liquids to start or “fresh-

en up” a fire in this heater. Keep all such liquids well

away from the heater while it is in use.

3. Light the newspaper and close the door. Gradually

build up the fire by adding a few 3-5” (76 - 127mm)

diameter splits.

If this is your initial break-in fire, let the fire burn brightly,

but not to excess. Control the fire’s intensity by adjust-

ing the air control lever. After an hour or so stop adding

wood so that the fire dies out gradually.

For ongoing operation after the initial break-in, continue

to add a few sticks at a time of a progressively larger

size. Be sure to keep the fuel load behind the front

grate bar at all times. Continue until you have a live

ember bed at least 3-4” (76 - 102mm) deep. This may

take an hour or longer, particularly when the Winter-

Warm is vented to an exterior masonry chimney or

when you are just starting a fire.

You’ll soon find out that the WinterWarm is HOT WHILE

IN OPERATION! KEEP CHILDREN, CLOTHING, AND

FURNITURE AWAY. CONTACT MAY CAUSE SKIN

BURNS.

NOTE: Some chimneys need to be “primed,” or

warmed up, before they will draw sufficiently to start

a fire. To correct this situation, roll up a couple pieces

of newspaper, place them on top of the kindling and

toward the back of the stove, light them, and close the

doors. This should heat the chimney enough to initiate

a draft.

Once the draft is established, open the front door and

light the rest of the fuel from the bottom. Do not light the

main bed of fuel until the chimney begins drawing, and

repeat the procedure as often as necessary if the initial

attempt is unsuccessful.

4. Once a good ember bed of at least 3-4” (76 -

102mm) has formed, close the damper to activate

the combustor. To ensure continued operation of the

combustor, let the fire burn hot for an additional ten

to fifteen minutes after the damper is closed.

5. Close the primary air control to a medium-low set-

ting, or about 1/3 the distance from right to left in

its travel range as described on Page 4. The fire

volume will diminish immediately, but the Winter-

Warm will continue to heat up. Maintain control of

the fire using the primary air control, and remember:

reduce the setting for less heat, increase the setting

for more heat. Refer back to the air control settings

chart on Page 4 for recommended settings at differ-

ent burn rates.

DO NOT OVERFIRE THIS HEATER. Overfiring may

cause a house fire, or can result in permanent damage

to the stove and to the catalytic combustor. If an exte-

rior part of the WinterWarm glows, you are overfiring.

Reloading and Reviving a Wood Fire

Open the stove damper, set the air control on “High,”

and wait at least fifteen seconds for the draft to in-

crease. Open the door slowly.

Check the ash level, and empty the ash pan if neces-

sary. Replace the pan.

Add the fuel, smaller pieces first. If it is necessary to

use wood smaller than the 24” (610mm) optimum size,

be sure to fill the firebox as completely as possible

by loading the wood pieces alternately on the left and

right. Split wood will fill the firebox more completely and

reduce the frequency of reloading.

If you have an ember bed of at least 3 - 4” (76 -

102mm), leave the damper open and the thermostat

set on “high” for 10-15 minutes, then close the damper.

If the ember bed is less than 3 - 4” (76 - 102mm), you

may have to let it burn longer.

Finally, adjust the air control and fan speed for your

desired heat level.

8

WinterWarm Fireplace Insert or System

2000941

NOTE: If the charcoal bed is relatively thick and your

fuel is well-seasoned, it is possible to add fresh fuel

(smaller pieces first), close the door and damper, and

reset the air control within five minutes.

Special Tactics for Cold-Climate Heating

The WinterWarm is capable of producing up to 50,000

Btu’s/hour and heating an area of up to 1,500 ft.2 (140

m2) However, many factors affect heating performance

and can influence the extent to which the WinterWarm

can heat a given area.

A well-insulated home, located in a moderate climate

and with the WinterWarm Fireplace Insert or Fireplace

System located centrally in an open floor plan, will be

easier to heat than a drafty home in the far north in

which a WinterWarm is installed on an exterior wall at

the end of a long house.

In Fireplace Insert installations, over-sized chimneys

can produce less effective results than those that are

properly sized, and interior chimneys usually perform

better than those located outside the house.

Different results may be experienced even in the same

installation if you switch from burning good, dry wood to

wood that is partially rotted or inadequately seasoned.

To compensate for these factors in cold climates, it may

be necessary to operate the WinterWarm for longer

periods of time than described above before closing the

damper, or to leave the air control set to a higher level

more of the time.

Open-Fire Viewing

with the Screen Cassette

The cassette screen that was included with your Win-

terWarm is interchangeable with the glass cassette, en-

abling you to convert from closed-door wood burning to

protected open-fire viewing. Always leave the damper

open when operating the WinterWarm with the screen

in the open-fire mode.

To change cassettes, use this procedure:

Let the WinterWarm cool completely

• Open the door

• Loosen the two short retainer clips, one at each

top corner of the cassette frame, and turn them to

clear the frame.

• Tilt the top edge of the cassette away from the

door frame.

• Carefully remove the cassette, being especially

careful with the glass cassette. Store the unused

cassette for future use.

• Examine the gasket that seals the cassette to the

perimeter of the door frame. Contact your local

dealer if you need a replacement gasket.

• Check the bottom channel of the door frame for

debris, and clean if necessary.

• Insert the new cassette, bottom edge first, then

the top edge.

IMPORTANT: The glass used in your WinterWarm is

coated with a special material on one side that reflects

heat back into the fire chamber. Before replacing a

glass cassette that has been removed, examine the

metal frame. One side has smooth, mitered corner

joints; the other side has rough weld marks.

To install the glass correctly, the smooth mitered

corners must be facing the gasket and the rough weld

marks must be positioned toward the fire chamber.

• Replace the two retainer clips, applying just

enough pressure to secure the cassette evenly

against the gasket.

Remove and Store Ash Safely

Check the ash pan before reloading the stove, and

empty if necessary using the following procedure:

• Open the damper

• Open the load door (Fig. 7)

• Pull open the ash chamber door with the hooked

end of the fall-away handle.

• If the ash level is nearing the top, place the

removable cover over the pan and make sure it is

completely engaged. Ash may contain hot coals

and must be treated with extreme care.

• Take the pan outdoors and empty the ash into

your ash container.

FP1075

Remove ash pan

3/28/01 djt

FP1075

Fig. 7 Carefully remove ash pan.

9

WinterWarm Fireplace Insert or System

2000941

• Before replacing the ash pan, clear away any ash

that has spilled over the sides and back of the

pan.

• Replace the ash pan and close the ash door and

front door.

Empty the ash pan regularly, typically every one to

three days. The frequency will vary depending on how

you operate your WinterWarm: You burn more wood

at higher heat output settings, and ash will accumulate

faster.

Ash should be removed frequently and placed outdoors

in a metal container with a tight-fitting lid. The closed

container of ash should be placed on a noncombustible

floor or on the ground, well away from all combustible

materials, pending final disposal. If the ash is disposed

of by burial in soil or otherwise locally dispersed, it

should be retained in the closed container until all cin-

ders have thoroughly cooled. -Wood ash may be used

as a garden fertilizer.

CAUTION: Never use your household or shop vacuum

cleaner to remove ash from the fireplace; always re-

move and dispose of the ash properly.

Section II Maintenance

Keep your WinterWarm Looking New

and Working Its Best

Care of the Cast Iron Surface

An occasional dusting with a dry rag will keep the

painted cast iron of your WinterWarm looking new.

If the paint needs retouching, first allow the surface

to cool completely. Wire-brush areas needing to be

painted. Touch-up with high temperature stove paint

available from your local dealer. Apply the paint spar-

ingly. Two light coats are better than one heavy one.

Care of the Porcelain Enamel Surface

Use a soft brush as necessary. Do not use water or

other liquids on your WinterWarm. Fingerprints usually

can be buffed off porcelain enamel with a dry, soft cloth.

If marks remain, allow the WinterWarm to cool com-

pletely, then buff with a slightly damp, soft cloth. Dry

completely before starting a fire to avoid streaking.

Never use abrasives or harsh chemical cleaners on the

porcelain enamel finish. The enamel may scratch and

expose the cast iron, which can then stain or rust. If

you must remove spills or stains from porcelain sur-

faces, make sure that the fire is out and that the Win-

terWarm has cooled completely before cleaning. Use a

kitchen appliance cleaner and polish especially formu-

lated for enamel surfaces. Apply the cleaner sparingly

with a soft cloth, and buff away all traces.

Cleaning the Glass

The WinterWarm glass system requires a minimum

amount of cleaning. Most carbon deposits that accumu-

late will burn off during hot fires.

Ash residue that accumulates on the glass should be

removed periodically to prevent etching. To clean the

glass, follow this procedure:

• Be sure the glass is completely cool.

• Cleaning with water will work in most cases. Use

a glass cleaner especially made for this purpose

only if deposits are especially heavy. (If heavy

deposits are a frequent occurrence, however,

evaluate your operating techniques.)

• Rinse the glass thoroughly.

• Dry the glass completely.

NOTE: The WinterWarm glass is coated with a

special material on one side that helps reflect heat

back into the fire chamber. Do not attempt to re-

move this coating.

10

WinterWarm Fireplace Insert or System

2000941

Adjust the Door Latch Periodically

The front door of the WinterWarm should close securely

to prevent accidental opening and should close tightly

to prevent air from leaking into the fire chamber. The

door handle will be positioned vertically when the door

is closed.

Over a period of time, the gasket around the door will

compress and the latch may need adjustment. To adjust

the handle, follow this procedure (Fig. 8):

1. Loosen the small lock nut with a wrench.

2. Extend the striker screw one turn by turning it with

an Allen wrench.

3. Re-tighten the lock nut, while at the same time hold-

ing the striker screw with the Allen wrench to prevent

its turning.

Test the door seal. Close the door on a dollar bill and

attempt to pull it free. If the bill is freed with little resis-

tance, the gasket isn’t snug enough at that spot. Contin-

ST531

Door Pawl

11/00

Small

Locking Nut

Large

Locking

Nut

Pawl

Striker Screw

Set Screw

Handle Stub ST531

Fig. 8 An adjustable latch lets you restore a tight seal to the

WinterWarm’s door.

ue to make small adjustments until the setting is right.

If additional adjusting of the latch does not enable the

door to seal sufficiently in one area, try “adjusting” the

gasket in that area. Pack more cement or a smaller

diameter gasket into the channel beneath the gasket so

the main gasket is raised and makes contact with the

door frame. This procedure should solve the problem.

If it doesn’t, replace the gasket following the directions

below.

How to Replace Gaskets

Your WinterWarm uses rope-type fiberglass gaskets

to make a tight seal between some parts. With use, par-

ticularly on those parts that move, gaskets can become

brittle and compressed and can begin to lose their ef-

fectiveness. These will need periodic replacement.

All of the gaskets used are made of fiberglass. The

three sizes of replaceable gasket are listed below,

along with their application.

Replaceable WinterWarm Fiberglass Gaskets

Gasket Size... ...And The Parts It Seals

1/2” The door to the front (#1)

1/2” The door to the front edge of

the grate (#2)

3/16” The cassette glass seal to

the door (#3)

3/8” The damper to the upper

fireback (#4)

FP1076

WinterWarm

door parts

3/28/01 djt

Short Re-

tainer Clips

Welded

Corner

Toward

Firebox

Long Retainer

Clips

#3 Gasket

#2 Gasket

#1 Gasket FP1076

Fig. 9 Front door components allow replacement of the

glass, gaskets or both.

Should you need to change a replaceable gasket, wait

until the fire is out and the stove has cooled. Be sure to

follow the standard safety procedure for working with

dusty materials: Wear safety goggles and a dust mask.

The procedure for replacing gaskets is the same,

regardless of the gasket location. Four easily-accom-

plished steps are involved:

1. Remove the existing fiberglass gasket by grasping

an end and pulling firmly.

2. Use a wire brush or the tip of a screwdriver to clean

the channel of any remaining cement or bits of gas-

ket.

3. Apply a thin bead of stove cement to the newly-

cleaned groove.

4. Pack a new gasket into the groove. Wait until you

have placed all but a couple inches from the end

before you trim the end to an exact fit.

11

WinterWarm Fireplace Insert or System

2000941

Replacing the Door Gaskets

Remove the door by lifting it straight up off its hinge

pins. Lay it face down on a padded surface.

Follow steps 1-4 as described above.

FP1077

Winter Warm

door gaskets

3/28/01 djt

#1 Gasket #2 Gasket

#3 Gasket

Fig. 10 Location of door gaskets.

FP1077

Replacing the Damper Gasket

Remove the front grate, bottom grate, ash pan, and ash

pan frame.

Follow steps 1-4 as described above.

FP1078

WinterWarm

damper gasket

3/28/01 djt

#4 Gasket

3/8” (10mm) Tail FP1078

Fig. 11 Location of damper gaskets.

Permanent WinterWarm Gaskets

Gasket size... ...And The Parts It Seals

1/2” The underside of the top plate to

the top edge of the air manifold

5/16” The flue collar to the top plate

5/16” The right end of the air

manifold to the right side plate

5/16” The left end of the firechamber to

the left end of the air manifold

5/16” The bottom edge of the lower

firebackto the bottom plate

5/16” and 3/8” The ends of the upper fireback to

the lower fireback and to the ribs

of the right and left side plates

Replace Damaged Door Glass Immediately

Do not operate the WinterWarm with a damaged glass

(or screen) cassette. Use the following procedure for

cassette replacement.

NOTE: Replace glass only with CFM Corporation high

temperature ceramic glass, available from your Ver-

mont Castings’ Authorized Dealer.

• Open the door and loosen the two retaining clips, one

at each upper corner, which hold the cassette to the

door frame. Swing the clips out of the way. Tilt the cas-

sette away from the door frame and lift up. Use caution

when handling a cassette that contains broken glass.

• Examine the gasket that seals the cassette to the

door frame. Replace if necessary with gasket obtained

from your local Vermont Castings’ Authorized Dealer.

See the directions for gasket replacement on page 9.

• Check the channel at the bottom of the door frame,

and clear away debris if necessary.

IMPORTANT: The glass used in your WinterWarm is

coated with a special material on one side that reflects

heat back into the fire chamber. Before replacing a

glass cassette that has been removed, examine the

metal frame. One side has smooth, mitered corner

joints; the other side has rough weld marks.

To install the glass correctly, the smooth mitered

corners must be facing the gasket and the rough weld

marks must be positioned toward the fire chamber.

• Secure the clips, being careful not to over-tighten. Be

sure the cassette is firmly seated against the gasket.

Close the door gently to confirm that the clips have

been properly positioned. It is possible for the glass to

be damaged if the clips have been installed incorrectly

and the door is closed with force.

Other gaskets form seals between non-moving parts,

but these are not subject to the same wear and dete-

rioration as gaskets on moving parts. It is unlikely that

you will ever need to replace these gaskets unless the

involved parts are disassembled and then put back

together. In any event, this is a job that should be done

only by qualified service personnel.

12

WinterWarm Fireplace Insert or System

2000941

Adjust the Damper as Needed

Examine your WinterWarm’s damper after the first 50

hours of use and adjust it if necessary. Thereafter,

check the damper at least once a year and adjust as

needed.

Both fine and coarse adjustments to the damper are

possible. Begin with the fine adjustment, which modifies

the pressure on the damper plate directly; it will take

care of most sealing problems. Proceed to the coarse

adjustment, which adjusts the pressure at the damper

latch, only if you cannot achieve a satisfactory seal with

the fine adjustment.

To inspect how well the damper seals, first make sure

that the fire is out and that the WinterWarm is cool.

Open the front door, and close and lock the damper.

Visually inspect the seal between the damper plate and

the damper frame; there should be no gaps. Now, push

gently on the damper — there should be some give, but

no rattle. If there is a gap in the seal or a rattle, adjust

the damper.

3. With the damper open, loosen the latch retaining

screw.

4. Move the latch approximately 1/8” (3mm) to the

right, and retighten the retaining screw.

5. Close and lock the damper, and check for gap and

rattle. Adjust the set screw as described under “Fine

Adjustment.”

Repeat the coarse adjustment if necessary.

For further assistnce, contact your Vermont Castings’

Dealer.

FP1080

Winter Warm

Damper view

3/28/01 djt

Damper Adjustment Screw Damper

Lock Nut

Left

Throat Half

Throat Retainer Clip

Right Throat

Half

FP1080

Fig. 12 A view of the damper as seen through the front door.

Try the Fine Adjustment First

1. Open the door.

2. Close and lock the damper.

3. Locate the damper adjustment set-screw in the cen-

ter of the damper plate, and loosen its lock nut.

4. Turn the set-screw 1/4 to 1/2 turn clockwise.

5. Check the damper seal for gap or rattle.

6. When the set screw position provides a good seal,

tighten the lock nut. Be careful not to overtighten the

set screw.

Use the Coarse Adjustment Only If Necessary

Follow Steps 1-3 of the fine adjustment procedure,

then;

1. Turn the set screw counter-clockwise several full

turns.

2. Lift off the mantel piece to expose the damper latch.

FP1081

WinterWarm

damper 

adjustment

3/28/01 djt

Damper Latch

Latch Retaining Screw

Shroud

Damper

Control

Rod FP1081

Fig. 13 With the mantel removed, the damper latch is ex-

posed for adjustment.

Care of the Catalytic Combustor

This wood heater contains a catalytic combustor, which

needs regular inspection and periodic replacement

for proper operation. It is against the law in the United

States to operate this wood heater in a manner incon-

sistent with operating instructions in this manual, or if

the catalytic element is deactivated or removed.

Under normal operating conditions, the catalytic com-

bustor should remain active for two to six years (de-

pending on the amount of wood burned). However, it

is important to monitor the combustor periodically to

ensure that it is functioning properly, as well as to de-

termine when it needs to be replaced. A non-functioning

combustor will result in a loss of heating efficiency, and

an increase in creosote and emissions.

The combustor should be visually inspected “in place”

for fly ash accumulation and physical damage three

times per year. Actual removal of the combustor is not

recommended unless a more detailed inspection is war-

ranted because of diminished performance as outlined

below.

The refractory package that houses the catalytic com-

bustor should be inspected annually for a build-up of fly

ash and cleaned if necessary. This may be done during

examination of the catalytic combustor.

The catalytic combustion system includes an air supply

for secondary combustion. The probe which controls

the supply should also be inspected annually.

13

WinterWarm Fireplace Insert or System

2000941

When to Suspect a Combustor Problem

The best way to evaluate the performance of your

WinterWarm’s combustor is to observe the amount of

smoke leaving the chimney — both when the combus-

tor has achieved “light-off” and when it has not. Follow

this simple two-step procedure:

• With a fire going and the combustor properly acti-

vated with the damper closed to route smoke through

it as described in the Operation Section, go outside and

observe the smoke leaving the chimney.

• Then, open the stove damper and once again ob-

serve the smoke leaving the chimney.

Significantly more smoke should be observed after

the second step when the stove damper is open and

exhaust is not routed through the combustor. Be careful

not to confuse smoke with steam from wet wood.

If this test indicates a problem, consider other possible

factors as well, such as the time of year or a change

in the quality of your fuel. In spring and fall, draft is

weaker than it is in colder winter weather, and fires can

burn sluggishly. Small, hot fires are a good solution

under these conditions.

Burning “green” (insufficiently seasoned) wood will re-

sult in poorer performance than when burning properly

seasoned fuel. You may have to run your stove hotter

(more air) to achieve good performance if you are burn-

ing green or wet wood.

Also, consider any changes in your operating routine as

well.

Once you have ruled out any other possible causes

for a decline in performance, you may proceed with an

inspection of the combustor.

Inspection and Removal of the Combustor

Before you begin, observe the basic safety precautions

for working with dusty materials: always wear safety

glasses, a recommended dust mask, and gloves. To

expose the combustor, first remove the throat pieces by

tapping upward at the far left and right corners with a

soft-faced hammer. Leave the bolt in the retainer loose,

and leave the retainer in place.

Examine the top surface of the catalytic element, which

will be visible. A small mirror and flashlight may provide

a better view. Unless the element shows a heavy fly

ash accumulation or major damage, do not remove it.

If combustor removal is necessary for cleaning or closer

inspection, follow these steps (Fig. 14):

1. Remove the front grate bar.

2. Remove the grate.

3. Remove the throat pieces as described above

FP1079

Winter Warm 

combustor

3/28/01 djt

Grate

Front

Grate Bar

Throat Pieces

Lower

Fireback

Ash Door

FP1079

Fig. 14 To reach the catalytic combustor, remove front grate

bar, grate, throat pieces and lower fireback.

Retainer

4. Tip the lower fireback forward, and remove it by lift-

ing it up and toward you.

5. Carefully remove the access panel. (Fig. 15) It is

extremely delicate and should be handled as little as

possible.

6. Slide the catalytic element out. (Fig. 16) Handle it

carefully, as the element is fragile.

FP1082

WinterWarm

remove access panel

3/01

Access Panel FP1082

Fig. 15 Remove the access panel.

FP1083

WinerWarm

remove catalyst

3/01

FP1083

Fig. 16 Removing the catalytic element.

14

WinterWarm Fireplace Insert or System

2000941

• Check the combustor and the bottom of the refractory

chamber for a build-up of fly ash, and remove any ash

by taking the combustor outside and gently blowing air

through the element. Do not brush the surface, as this

could damage the element. Carefully vacuum ash from

the refractory chamber.

• Refer to the “Catalytic Combustor Appendix” on Page

37 for information on what kinds of damage or deterio-

ration to look for. Although small hairline cracks will not

affect performance, the combustor should be essen-

tially intact. If the combustor is broken in pieces or has

sections missing, it should be replaced. Call your local

Vermont Castings’ dealer for a replacement combustor,

item #30001152. Consult the warranty section at the

back of this manual for further information on catalytic

combustor replacement.

• While the catalytic element is removed, check the

condition of the secondary air probe. Use an inspec-

tion mirror to locate the probe within the combustion

chamber. (Fig. 17) The probe should extend 1 to 1¹⁄₂"

(25 - 38mm) into the chamber and show no signs of

deterioration, (warping, short length). Refer to the next

illustration. A damaged secondary air probe could affect

catalytic performance. If the probe needs to be re-

placed, call your local dealer.

1"

ST559

Secondary 

Probe inspection

11/00

ST559

Fig. 17 Use an inspection mirror to check the secondary

probe.

5. Reinstall the throat pieces, center edges first, then

outer edges. Tap the throat pieces downward firmly

to seat the lower fireback.

6. Replace the grate.

7. Replace the front grate bar. With the horizontal bars

pointing down and away from you, angle the bar

inside the firebox to seat the right end. Then, bring

the left end forward and lower it into position.

Watch for Better Results

Finish up by cleaning the chimney and chimney con-

nector. Then, use your WinterWarm in a typical man-

ner for two weeks and observe its performance, taking

particular note of the smoke observation test described

on Page 11.

If a problem persists, contact your local dealer for fur-

ther advice about your particular situation.

The Chimney System

A Clean Chimney System is

Safer and Works Better

Although the catalytic combustion system in your Win-

terWarm can reduce creosote formation dramatically, it

is not a substitute for regular inspection and cleaning of

the chimney and chimney connector.

Learn to Recognize —

and Avoid — Creosote

Your WinterWarm has been designed to reduce creo-

sote build-up significantly. However, regular chimney

inspection and maintenance must still be performed.

For safety, good stove performance, and to protect your

chimney and chimney connector, inspect your chimney

and chimney connector on a regular schedule. Clean

the system if necessary. Failure to keep the chimney

and connector system clean can result in a serious

chimney fire.

When wood is burned slowly, it produces tar, organic

vapors and moisture which combine to form creosote.

The creosote vapors condense in the relatively cool

chimney flue of a slow-burning fire. As a result, creosote

residue accumulates on the flue lining. When ignited,

this creosote makes an extremely hot fire within the

flue system that can damage the chimney and overheat

adjacent combustible material. If a significant layer of

creosote has accumulated —1/8” (3mm) or more — it

should be removed to reduce the risk of a chimney fire.

If you do experience a chimney fire, act promptly to:

• Close the damper and thermostat lever.

• Get everyone out of the house.

• Call the Fire Department.

If the combustor is in good condition and clean, re-in-

stall it following this procedure:

1. Slide the element carefully back into the refractory

chamber, seating it securely. The element must be

fully to the rear of the support slot.

2. Install the access panel, making sure that it is flush

with the outer surface of the main refractory pack-

age.

3. Check the slot in the rear bottom plate for debris,

and clean if necessary.

4. Reinstall the lower fireback by inserting the base

of the fireback in the slot. Tip the fireback up into

place.

15

WinterWarm Fireplace Insert or System

2000941

You should inspect the system every two weeks during

the heating season as part of a regular maintenance

schedule. To inspect the chimney, let the WinterWarm

cool completely. Then, using a strong light, sight up

through the flue collar into the chimney flue. If it is not

possible to inspect the flue system in this fashion, the

firechamber must be removed to provide better viewing

access.

If it is necessary to remove the firechamber to inspect

or clean the chimney, this is how to do it:

• Let the WinterWarm cool.

• Disconnect the fan power cord.

• Remove the load door, grate bar, grate and ash

door.

• Retract all four levelling screws until they bear no

weight.

• If you installed the CFM Corporation Flex Connector

System, bend the four retaining tabs on the Starter

Piece until they are straight. Push the Starter Piece

upward until it is clear of the shroud.

• Slide the firechamber forward until you have access

to the fireplace opening.

• Remove any sealing plates and the chimney con-

nector from the fireplace damper frame area.

You can now inspect the smoke shelf area and the

chimney. Before replacing the WinterWarm, this area

should be inspected for signs of deterioration and

cleaned thoroughly with a chimney brush.

Clean the chimney using a specially designed brush the

same size and shape as the flue liner. Flexible fiber-

glass rods are used to run the brush up and down the

liner, causing any deposits to fall to the bottom of the

chimney where they can be removed through the clean-

out door.

The chimney connector should be cleaned by discon-

necting the sections, taking them outside, and removing

any deposits with a stiff wire brush. Reinstall the con-

nector sections after cleaning, being sure to secure the

individual sections with sheet metal screws.

If you can’t do the chimney inspection yourself, con-

tact your local Vermont Castings’ Authorized Dealer, or

engage a professional chimney sweep to perform the

inspection and cleaning of the chimney.

If you are the owner of a WinterWarm Fireplace Sys-

tem, the prefabricated chimney used with your fireplace

should be cleaned from above using an 8” round brush

and the appropriate number of extension rods for com-

plete access.

The chimney cap first must be removed following the

procedure recommended by the manufacturer. After

thoroughly cleaning the chimney, reinstall the chimney

cap according to the manufacturer’s directions.

WinterWarm Maintenance Schedule

Fireplace:

Daily:

• Ash should be removed before the level reaches the

top of the pan. Check each time you re-load, or at

least once a day.

• Keep the area around the fireplace clear of any com-

bustible material.

Yearly Spring Cleaning:

• Remove ash from the fire box and replace with a

moisture-absorbing material (such as Kitty Litter) to

keep the interior of the fireplace dry.

• Touch up painted surfaces with black paint.

Flex Connector:

Two Weeks:

• Inspect the chimney and flex connector. Clean the

system if necessary.

YEARLY SPRING CLEANING:

• Disassemble the flex connector and take it outdoors

for inspection and cleaning. Replace weak sections

of connector.

• Inspect the chimney for signs of deterioration.

Repairs to a masonry chimney should be made by

a professional mason. Replace damaged sections

of prefabricated chimney. Your local Vermont Cast-

ings’ dealer or a chimney sweep can help determine

when replacement is necessary.

16

WinterWarm Fireplace Insert or System

2000941

2 4 1 3

2 1

LEFT

FAN

11

6

8

3 1 4 2

1 2

RIGHT

FAN

24

9

SH2 SH4 SH4 SH2

On Body Assembly

Field Cover

Wireway

13

21

17 17

21 8

13

2 4 1 3

2 1

PH2 PH4

RHEOSTAT

N

G I

H

N

H

15

Left Receptacle

B A

1

10

5

7

12

20

16

3 1 4 2

1 2

PH4 P H2

N

G I

H

N

H

Right

Receptacle

19

23

14

22

18 On Front Assembly

Legend

Black Wire (Hot)

White Wire (Neutral)

Green Wire (Ground)

Female Terminal

Loop Terminal

Wirenut

Wire Number

Ground Screw (Green)

SH Socket Housing

PH Pin Housing

S Socket

P Pin

FP1301

WinterWarm

wiring diagram

2/7/03 djt

Large WinterWarm Wiring Diagram

17

WinterWarm Fireplace Insert or System

2000941

Section III: Preparing a Masonry Chimney

Installing the WinterWarm into a masonry fireplace is an

effective way to add an efficient heater to your home.

Requirements for the

Existing Masonry Fireplace

The WinterWarm Fireplace Insert is listed only for

installation within a properly built masonry or heat

circulating, masonry-type fireplace that is constructed in

accordance with the requirements of recognized build-

ing codes. A heat-circulating masonry-type fireplace

must conform to building code standards for masonry

fireplaces, and must consist of a factory-built metal

firebox with air circulation pathways that are surrounded

by masonry materials.

NOTE: The WinterWarm is not listed for use in

“zero-clearance” prefabricated fireplaces, except

when used as part of the Vermont Castings’ Winter-

Warm Fireplace system, including the WinterWarm

Fireplace Energy Cabinet, item #2110 (referred to on

the WinterWarm safety label as Fireplace Cabinet

Model 1283).

The fireplace and chimney must be clean and structur-

ally sound. Have it inspected by a qualified professional

chimney sweep, a mason, or your Vermont Castings’

Authorized Dealer before the WinterWarm is installed.

Any deterioration (cracks, loose mortar or loose bricks)

must be repaired.

The fireplace should not be modified to install the Win-

terWarm without first checking with your local building

inspector or fire marshal. Do not remove bricks or mor-

tar that may jeopardize the compliance of the fireplace

with local building codes.

Requirements of your

Existing Masonry Chimney

Your fireplace chimney must be well-constructed and

must meet minimum code requirements. The chimney

flue should have a code-approved liner made of mason-

ry or pre-cast refractory tiles, straight or flexible stain-

less steel pipe, or a poured-in-place liner. An unlined

chimney must be relined professionally. Chimney height

should be no less than 15’ (4.6m) above the hearth and

no more than 35’ (10.7m).

The chimney must have a nominal flue size of 8” x 8”

(203 x 203mm) or larger, with a maximum size of 12”

x 12” (305 x 305mm). Some chimneys originally de-

signed for fireplace use may perform differently when

used to vent an air-controlled appliance such as your

WinterWarm. A chimney on an outside wall with a large

flue, for example, may not heat up enough to sustain

an adequate draft. Such a flue can often be improved if

it is relined to reduce its size and/or insulated to keep it

warmer.

The chimney should extend at least 3’ (914mm) above

the highest point where it passes through a roof, and at

least 2’ (610mm) higher than any portion of a building

within 10’ (3m). (Fig. 18)

Existing masonry fireplace chimneys, especially older

ones, may have one or more openings used at an

earlier time to connect stoves in different rooms to the

fireplace chimney. These openings must be sealed with

masonry to the thickness of the chimney wall. Unused

openings sealed with pie plates or wallpaper are a haz-

ard. In the event of a chimney fire, flames and smoke

may be forced out of these unused openings.

Do not connect your WinterWarm fireplace insert to

a chimney flue serving another appliance.

Minimum Fireplace Dimensions

The WinterWarm Fireplace Insert will fit most masonry

fireplaces. To confirm that it will fit yours, measure the

lintel depth, plus the height, width, and depth of your

fireplace and your hearth. Compare them to the mea-

surements in the accompanying chart. If you choose to

install a new hearth over an existing fireplace hearth,

be sure to take its thickness into consideration when

measuring both front and back height of the fireplace.

2' Min.

2' Min.

3'

Min.

0 To 10'

3'

Min.

0 To 10'

AC617

RLTSKC8

2/11/98



Reference

Point AC617

Fig. 18 The 2’3’10’ rule for chimneys.

18

WinterWarm Fireplace Insert or System

2000941

Clearance Requirements

After confirming that your fireplace is the right size,

check the clearances to combustibles. First mark with

tape the exact center of your fireplace opening on the

hearth. Measure the side clearance from this point.

Measure the top trim and/or mantel clearances from the

finished hearth surface. Measure the front clearance (to

furnishings, etc.) from the fireplace face.

NOTE: The clearance between the WinterWarm Fire-

place Insert and the mantel, top trim and side trim can-

not be reduced by installing shields.

Another clearance requirement to consider is that

for movable items such as tables, bookcases, rugs,

furnishings, and your woodbox. All combustible materi-

als of this type should be a minimum of 48” (1219 mm)

from the front surface of the WinterWarm. Be sure that

family members are aware of this requirement as well,

so they too will keep objects a safe distance from the

WinterWarm.

A,I

BC

D,J

E

D,J

H

F

,G

CE

FP1084

winterwarm

fireplace minimum dimensions

3/01

Fireplace Minimums

A. Width at Face 34” (864 mm)

B. Width at

18¹⁄₂” depth 22” (559 mm)

C. Depth1 19” (483 mm)

D. Height at Face 24” (610 mm)

E. Height at

19¹⁄₂” depth 16” (406 mm)

F. Damper Width2 5” (127 mm)

G. Damper Length2 14” (356 mm)

Fireplace Maximums

H. Lintel depth 6³⁄₄” (172 mm)

I. Width3 51” (1295 mm)

J. Height3 36” (914 mm)

FP1084

1. The minimum depth must be maintained from the floor of the

fireplace to a height of 16” (416 mm).

2. These are the minimum damper dimensions required for use of

the Vermotn Castings Flex Connector System.

3. Though the WinterWarm Fireplace Insert will fit into larger fire-

places, the decorative surround panels will not completely cover the

fireplace opening if these dimensions are exceeded. Custom made

trim may be used.

Fig. 19 Use thes measurements to confirm that the Winter-

Warm will fit into your masonry fireplace.

X

FP1085

WinterWarm

clearances

3/01

C

A

B

Fireplace Clearances

Masonry Fireplace System

Fireplace Cabinet

A. Mantel* 38¹⁄₂” (978 mm) 43” (1092 mm)

B. Top Trim* 38¹⁄₂” (978 mm) 43” (1092 mm)

C. Side Trim** 24” (610 mm) 24” (610 mm)

Measure side

trim clearance

from here

FP1085

*The mantel and/or top trim must be 9” (229 mm) in depth or less.

For the WinterWarm System, measure from the supplied trim

panel forward.

**Where side trim extends more than 2” (52mm) from the fireplace

facing, the side clearance must be no less than 42” (1067 mm).

Measure the side clearance (C) from the exact center of your fire-

place opening on the hearth (X). Measure the top trim (B) and/or

mantel clearances (A) from the finished hearth surface. Measure

the front clearance (to furnishings, etc.) from the fireplace face.

Fig. 20 Observe these clearances to combustible trim.

Hearth Requirements

In some fireplaces, the hearth in front of the fireplace

opening is brick, stone, slate, or some other non-com-

bustible material that is in direct contact with concrete

poured over earth. These are the only hearths that are

considered noncombustible.

In other fireplaces, the brick or concrete hearth in front

of the fireplace opening is supported by heavy wooden

framing. Because neither brick nor concrete has good

insulating properties, heat radiated by the fire will pass

downward through the hearth to the wooden framing.

Such hearths are considered combustible.

Unless the fireplace and hearth are constructed over a

completely noncombustible surface (such as unpainted

concrete over dirt), a floor protector must be used in

WinterWarm Fireplace Insert installations in front of and

to the sides of the door as protection against spilled

coals and embers.

Floor protectors must extend at least 8” (203 mm) from

the side of the door opening, making the protector 40”

(1016 mm) wide. In addition, the floor protector must

extend from the front door opening a minimum of 16”

(410 mm) in the United States and 18”(457 mm) in

Canada.

19

WinterWarm Fireplace Insert or System

2000941

NEW

required

thickness

K of new material (per inch)

K of listed material (per inch)

thickness

of listed

material

= x

IWF291

MBUF

6/19/96

(K factor

of alternate

material)

(0.84)

X (7/16" [11mm]) =

(Required thickness of

alternate material)

(5.0)

(0.84) X (7/16" [11mm]) = 2.6" (65mm)

A

BB

C

FP1086

WW

Hearth

Flue

Collar

Glass

Door

United States Canada

A. 16“ (410 mm) 18” (457 mm)

B. 8” (203 mm) 8” (203 mm)

C. 40” (1016 mm) 40” (1016 mm)

FP1086

NOTE: Measuring from the door opening of the insert to the fire-

place opening adds 3¹⁄₂” (90mm) to the total depth of the hearth

protector.

Fig. 21 Unless your fireplace and hearth are constructed

over a dirt floor (or unpainted concrete over dirt), you must

use a floor protector that satisfies the above requirements.

The approved construction of a floor protector calls for

24 gauge galvanized sheet metal covered with a listed

floor protector material that is at least 7/16” (11 mm)

thick (such as Wonderboard® or Durock®). The floor

protector may be covered with a noncombustible deco-

rative material if desired. (Fig. 21)

Custom-made floor protectors may be used if they offer

the same protection as the approved floor protector

described in the preceding paragraph, which in testing

was found to have a standard K value of 0.84. Custom-

built floor protectors must have a K value equal to, or

less than, 0.84, meaning that heat will transfer at the

same rate or more slowly than the tested standard.

To calculate the thickness required for an alternate

material to result in a K value of 0.84, first determine

the alternate material’s K factor. This information should

be available from your local building supply yard. Then,

calculate the following formula:

Let’s use brick as an example, since it is a commonly

used hearth material. Its K factor is 5.0.

That is, when using brick for the hearth extension, the

brick must be a minimum of 2.6” (65 mm) thick.

Once you know the K factor of a given material, you

can use this same formula to calculate its required

thickness for approved hearth protection.

NOTE: Any floor protector thicker than 9/16” (14mm)

will require elevating the firechamber on a solid, ap-

proved floor protector to provide enough clearance for

the door to open. This in turn will require a higher fire-

place opening to permit installation of the fire chamber.

The Chimney Connector

Connect your WinterWarm Fireplace Insert to the

chimney flue with a “positive flue connection.” Such a

connection provides a direct passageway for smoke

and exhaust gases leading from the flue collar of the

WinterWarm to the first chimney lining tile. Positive

flue connections are required in many areas before an

installation can be approved.

The chimney connector itself should have a minimum

cross-sectional area of 50 square inches (320 square

centimeters), equivalent to an 8” (203 mm) diameter

opening, and must be 24 gauge or heavier.

Sealing Requirements

It is important to seal off the flue completely from the

room air for proper operation of your WinterWarm.

There are three ways to accomplish this:

1. Install a CFM Corporation Flex Connector system;

2. Install a customized seal at the damper level;

3. Have your chimney professionally re-lined and con-

nect the liner directly to the WinterWarm.

Of these three choices, the Flex Connector not only

provides an effective seal but usually is the easiest to

install.

The Flex Connector System

The Flex Connector bends the chimney connector

through angled smoke chambers and narrow damper

frames, and its Block-off plate makes a tight seal at the

damper frame. (Fig. 22)

To determine the suitability of the Flex Connector for

your fireplace, carefully examine the fireplace damper

area. The damper opening must be unobstructed

and must measure at least 5” x 14” (127 x 356 mm) to

accommodate the Flex Connector and the Block-off

Plates. An undersized opening, or an opening obstruct-

ed by heat exchanger tubes or damper components,

may prevent the Flex Connector from extending up to

the flue or may be possible only after special work has

been done.

20

WinterWarm Fireplace Insert or System

2000941

FP1087

WW

Flex connector

3/30/01 djt

Flex Connector

1/4” (6mm)

Nut

Pipe

Support

1/4” (6mm)

Nut

Pipe

Support

Block-Off

Plate

1/4”

(6mm)

Screw

Starter Piece

(Optional)

1/4” (6mm)

Wing Nut

1/4” (6mm)

Washer

1/4” (6mm) Bolt

FP1087

Fig. 22 Components of the Flex Connector System.

Consult a Vermont Castings’ Authorized Dealer for in-

stallation suggestions. It may be possible to enlarge the

opening by removing or modifying the damper frame,

but do this only if it won’t weaken the fireplace. Check

with your local building inspector to be sure modifica-

tions comply with local codes.

Although the Flex Connector is designed to be installed

by any mechanically competent person, wide variations

in fireplace and damper construction can complicate

the installation. You may wish to have the job done

by a professional installer. Complete detailed installa-

tion instructions are included with the Flex Connector

components.

A Custom Damper Seal

If the design of your fireplace damper prohibits the use

of the CFM Corporation Sealing Package, an alterna-

tive is to fabricate a custom sealing plate at or below

the fireplace damper frame. The plate can be fastened

securely to the lintel (the structural piece spanning the

fireplace opening) and to the surrounding masonry, or

be securely fastened to the damper frame. A section

of chimney connector, attached to the WinterWarm

flue collar, must make a positive flue connection where

required by code.

A Relined Chimney

There are a number of fittings available from your Ver-

mont Castings’ Authorized Dealer that are designed to

form the connection between your WinterWarm and an

8” (203mm) diameter chimney liner. Your dealer as well

as your local chimney sweep can advise you on the

types of lining systems currently available.

Preliminary Steps for Installing the

WinterWarm into a Masonry Fireplace

1. Remove the Masonry Fireplace Damper

The existing damper plate within your fireplace must

be removed or, if that is not possible, must be fastened

securely in a fully-open position. Many dampers can

be removed simply by removing a cotter pin and/or set

screw.

2. Install the Flex Connector

Following the installation instructions that are packed

with the Flex Connector, unfold the template that came

with the WinterWarm. (Fig. 23) Carefully glue the tem-

plate onto a large piece of sturdy cardboard or plywood,

making sure that the fold lines have been flattened. Cut

along the edges of the template and use it to place the

Flex Connector components correctly in your fireplace.

Custom Fabrication:

Be sure any chimney connector or adapter is properly

installed and secured in place. There should be a slip

joint near the WinterWarm so that the connection can

be easily disengaged for removal and cleaning of the

unit.

FP1088

WinterWarm

template

3/30/01 djt

Template

FP1088

Fig. 23 Using the template that came with the WinterWarm

will help you position Flex Connector.

21

WinterWarm Fireplace Insert or System

2000941

3. Reverse the Flue Collar (If Necessary)

The flue collar of the WinterWarm is reversible to allow

for installation into fireplaces with different lintel depths

and different damper orientations. It is shipped in the

rear-most position (the deep lintel position), which ac-

commodates lintel depths up to 6³⁄₄” (172 mm). The

fore-most flue collar position will accomodate lintels as

shallow as 4³⁄₄” (121 mm) in depth.

Taking into account the location of the damper frame,

choose the flue collar position that enables the chimney

connector to be installed using the most gradual bend

possible.

To reverse the flue collar, remove the flue collar in-

sert panel located on top of the shroud by removing

the sheetmetal screws around the panel’s perimeter.

Remove the two fasteners that attach the flue collar to

the insert panel, then remove the panel. You then have

access to the top plate and to the flue collar.

Remove the four fasteners that attach the flue collar

to the top plate of the WinterWarm. Lift the flue col-

lar away from the top plate. Position the flue collar in

the desired orientation, and reinstall the four fasteners.

Make sure the flue collar is seated firmly against the

gasket material.

Replace the flue collar insert panel. Fasten the flue

collar to the panel, and re-install the sheet metal screws

around the panel’s perimeter.

4. Install the Floor Protector

Make sure the floor protector satisfies the requirements

discussed on Pages 17 and 18.

5. Assemble the Optional Surround Panel and Lean

it against the Front of the Fireplace

If your installation will include the optional surround

panels, assemble them according to the instructions

packed with the panels. Lean the finished assembly

against the chase front.

The CFM Specialist Home Products modular Surround

Panels cover gaps up to 4⁵⁄₈" (116 mm) using a single

panel, and up to 9¹⁄₄" (231 mm) using double panels.

Surround Panel kit #3014 has outside measurements of

31³⁄₄" tall by 43⁷⁄₈" wide (806mm tall x 1114 mm wide);

by combining Kit #3014 with extension kit #3015, the

resulting surround is 35⁹⁄₁₆" tall by 51¹⁄₂" wide (903 mm

tall by 1308 mm wide).

Custom-made surround panels may be made from any

noncombustible material, with the following restrictions:

The maximum suggested thickness of the surround

material is determined by both flue collar position and

lintel depth. For installations using the front flue collar

position, the maximum suggested surround thickness

is 4" (102 mm) minus the lintel depth. For example, a

3" (75 mm) lintel would result in a maximum surround

thickness of 1" (25 mm) .

There is no need to attach the surround panels to the

insert or to the fireplace. The modular surrounds are

sized to stand without additional support or attachment;

they are simply trapped between the fireplace insert's

cast-iron front, and the face of the fireplace.

For rear exit flue positions, the suggested position

would allow a surround thickness of 3¹⁄₂" (88 mm).

With these preliminary steps completed, you can now

proceed to install the WinterWarm firechamber and

front. That information is located in Section V, “Com-

pleting the WinterWarm Installation,” and begins on

Page 29.

51¹⁄₂" (1308mm)

43⁷⁄₈" (1114mm)

35⁹⁄₁₆"

(903mm)

31³⁄₄"

(806mm)

FP1089

WinterWArm

trim sizes

3/28/01 djt

Kit #3014

Kit #3015 FP1089

Fig. 24 CFM Corporation #3014 and #3015 Optional Sur-

round Trim Kits.

22

WinterWarm Fireplace Insert or System

2000941

Section IV: Installing the Fireplace System Cabinet

The insulated metal cabinet included with the Win-

terWarm Fireplace System enables the WinterWarm

Fireplace Insert to be installed in minimum-clearance

situations and where no masonry fireplace or chimney

exists, such as in new home construction or in renova-

tion.

Use only CFM Corporation WinterWarm firecham-

ber Model #2100 in this fireplace cabinet. Do not

use other products not specified for use with this

fireplace. The two (2) vent ducts supplied with the

energy cabinet must be installed as described in

this manual. Never install the energy cabinet with-

out installing the vent ducts.

Carefully Observe Local Building Codes

Meeting the requirements of your local building codes is

an important part of planning your WinterWarm instal-

lation. Because the final approval for an installation is

always granted by local officials, and because codes

vary in different areas, involving your local officials

in the planning stage can help facilitate the approval

process. Review your plans with them before beginning

the installation.

Ask your Vermont Castings’ Authorized Dealer for help

in providing the necessary information to local officials.

In the pages that follow you’ll find information on plan-

ning, construction, and clearance for almost all instal-

lations. If you need further assistance, refer to the Na-

tional Fire Protection Association ANSI/NFPA 211-1988

Standard for Chimneys, Fireplaces, Vents and Solid

Fuel Burning Appliances, or, in Canada, CSA B365.

Your local Vermont Castings’ Authorized Dealer or your

local building official may have a copy.

Selecting a Location for Your Fireplace

Centrally located installations circulate the heat most

effectively and take full advantage of the WinterWarm’s

powerful heating capability. (Fig. 25)

An interior chimney is preferred, as it stays warmer

and provides a more reliable draft than a chimney on

the outside of the building. Locating the chase on an

exterior wall has the advantage of reducing the existing

floor space required by the installation, however, and

an exterior chimney can be enclosed in a chase built to

resemble a traditional fireplace and insulated to keep it

warmer.

LU584-1

Locating unit

2/4/99 djt

LU584-1a

Fig. 25 The WinterWarm Fireplace System offers a variety of

siting options.

Structural Considerations

of the Installation

Chase Dimensions

The WinterWarm Fireplace System installs in an open-

ing just 28¹⁄₂" (724 mm) deep, 39¹⁄₂" (1003 mm) wide,

and as little as 89" (226 cm) high. (Fig. 26) The enclos-

ing chase will be wider by the thickness of studding and

drywall, or other wall finish material. The basic trim

package requires an overall enclosure width of at least

48" (1219 mm), plus the width of any edge molding to

be applied. The chase must be at least 89" (226 cm)

high.

FP1089

WinterWArm

trim sizes

3/28/01 djt

28¹⁄₂"

(724mm)

39¹⁄₂" (1003mm)

Trim 48" (1219mm)

FP1090

Fig. 26 Minimum dimensions for framing the WinterWarm

Fireplace System when the chase is oriented perpendicular

to wall.

23

WinterWarm Fireplace Insert or System

2000941

FP1089

WinterWArm

trim sizes

3/28/01 djt

66" (1683mm)

66" (1683mm)

27"

(686mm)

27"

(686mm)

39¹⁄₂"

(1003mm)

93¹⁄₂" (237cm)

FP1091

Fig. 22 Minimum dimensions required for framing a corner

installation of the chase.

I

B

D

E

C

B

A

C

FP1093

WinterWarm

Front vent framing

dimensions

4/2/01 djt

E

GF F

A 39¹⁄₂” (1003 mm) E 12” (305 mm)

B 62” (1575 mm) F 9³⁄₄” (248 mm)

C 89” (2260 mm) G 12¹⁄₈” (308 mm)

D 28” (711 mm) I 28¹⁄₂” (724 mm)

Chase Front Chase Side

FP1093

Fig. 29 Suggested framing and dimensions for venting the air

ducts through the chase front.

Duct and Vent Placement

The WinterWarm offers great flexibility in positioning

the hot air ducts. The ducts can vent through the side of

the chase, through its front, or one each through both

the side and the front. Either or both ducts also may be

vented into a room behind, beside or above the room

in which the WinterWarm is installed. Both ducts must

be installed in order to properly vent the hot air in-

side the energy cabinet. Failure to connect the vent

ducts could result in overheating of the cabinet

and surrounding construction. The ducts must be

installed at least 12” (305 mm) from the ceiling and

no lower than the cabinet top.

Figures 28 and 29 show construction dimensions for

some of the common duct placements.

Chimney Requirements

For proper draft and best performance, the chimney

should extend at least 15’ (4.6 m), and not more than

35’ (10.6 m), above the hearth surface. If the chimney

above the roof line is enclosed in a chase, the chimney

must extend at least 3’ (914 mm) above the top of the

chase. The chimney must be supported either from

the roof or from the floor joists above the WinterWarm.

The cabinet is not intended to be the sole support of

the chimney. Support systems are available from the

chimney manufacturer.

An installation with a straight, vertical chimney will have

the best draft and is the easiest to clean.

If structural components such as floor joists or roof raf-

ters are obstacles to the chosen location, however, up

to four 30° elbows may be connected directly to each

other. Used in pairs, the elbows will return the chimney

pipe to vertical after it has passed the obstacle. (In

some instances floor joists can be cut and boxed in for

reinfor

cement, but engineered roof trusses should never

be cut.) The first offset must be at least 8’ (2.5 m) above

the hearth. Elbows may not be used within the chase.

The WinterWarm Fireplace System is listed for use in

the United States with seven 8” (203 mm) diameter

chimney systems that have been listed to High Temper-

ature (H.T.) Chimney Standard UL-103-1985 (2100°F).

I

B

D

E

FGH

C

B

A

C

FP1092

WinterWarm

Side vent framing

dimensions

4/2/01 djt

2” x 4” or Smaller

FP1092

Chase Front Chase Side

A 39¹⁄₂” (1003 mm) F 9³⁄₄” (248 mm)

B 62” (1575 mm) G 12¹⁄₈” (308 mm)

C 89” (2260 mm) H 9³⁄₄” (248 mm)

D 28” (711 mm) I 28¹⁄₂” (724 mm)

E 12” (305 mm)

Fig. 28 Suggested dimensions and framing for side-venting

the air ducts of the chase.

24

WinterWarm Fireplace Insert or System

2000941

The listed chimneys and their manufacturers are:

American Metal Products Ameri-Tec Model HS

Condensation

Engineering Corp. Model HS

GSW Building Product Co. Model SC

Metal Fab, Inc. Model TG

Security Chimneys Ltd. Model ASHT

Selkirk Metalbestos Model SSII

Simpson Dura-Vent Model SDP

In the United States, do not use any other chimney

system with the WinterWarm Fireplace System.

In Canada, the WinterWarm Fireplace System is listed

for use with any 200 mm diameter prefabricated chim-

ney tested and listed to the High Temperature (650°C)

Chimney Standard, ULC S-629.

Guidelines for an Outside Air Supply

Outside air may be introduced to the WinterWarm at

either of two available ports: at the lower left corner of

the back of the cabinet (as viewed from the front), or at

the lower left corner of the left side panel.

An outside air duct must be 3” (75 mm) in diameter,

must be no longer than 20’ (6 m), and must not have

more than three elbows. No part of the outside air duct

(including the outside air inlet) may be higher than the

89"

(2260mm)

FP1094

WW

chimney components

4/2/01 djt

Chimney Cap

Storm Collar

Roof Support Package

Flashing

Firestops

Wall Band

Offset

Firestop

Chimney Section

Anchor Plate

Front Cabinet

FP1094

Fig. 30 Typical chimney components used in the installation

of a WinterWarm Fireplace System.

cut-out panel on the WinterWarm shroud, and it should

terminate at an outside air source. It may not terminate

in a garage or basement, nor near another fuel-fed ap-

pliance. The air inlet must be covered by a wire mesh

screen (not included) with openings not larger than 1/4”

x 1/4” (6 x 6 mm) to prevent rodents from entering from

the outside. The optional duct kit includes a valve to

close off incoming air when the WinterWarm is not in

use.

Hearth Requirements

Unless the Fireplace System Cabinet will be installed

on a completely noncombustible surface such as

unpainted concrete over earth, a floor protector must

be used in the installation for protection against radi-

ated heat as well as protection against spilled coals and

embers.

Floor protectors must extend at least 8” (203 mm) from

the side of the door opening, making a total width of 40”

(1016 mm). In addition, the floor protector must extend

from the front door opening a minimum of 16” (410 mm) in

the United States and 18”(460 mm) in Canada. (Fig. 31)

A

BB

C

FP1086

WW

Hearth

Flue

Collar

Glass

Door

United States Canada

A. 16“ (406 mm) 18” (457 mm)

B. 8” (203 mm) 8” (203 mm)

C. 40” (1016 mm) 40” (1016 mm)

FP1086

NOTE: Measuring from the door opening of the insert to the fire-

place opening adds 3¹⁄₂” (90mm) to the total depth of the hearth

protector.

Fig. 31 A floor protector must satisfy these requirements.

The approved construction of a floor protector calls for

24 gauge galvanized sheet metal covered with a listed

floor protector material that is at least 7/16” (11 mm)

thick (such as Wonderboard® or Durock®). The floor

protector may be covered with a noncombustible deco-

rative material if desired.

25

WinterWarm Fireplace Insert or System

2000941

Custom-made floor protectors may be used if they offer

the same protection as the approved floor protector

described in the preceding paragraph, which in testing

was found to have a standard K value of 0.84. Custom-

built floor protectors must have a K value equal to, or

less than, 0.84, meaning that heat will transfer at the

same rate or more slowly than the tested standard.

To calculate the thickness required for an alternate ma-

terial to result in a K value of 0.84, first determine the

alternate material’s K factor. This information should be

available from your local building supply yard. Then,

calculate the following formula:

Let’s use brick as an example, since it is a commonly

used hearth material. Its K factor is 5.0.

That is, when using brick for the hearth extension, the

brick must be a minimum of 2.6” (65 mm) thick.

Once you know the K factor of a given material, you

can use this same formula to calculate its required

thickness for approved hearth protection.

Flush with the Floor or Laid Over It?

Generally, it is easier to lay floor protectors over the fin-

ished floor in existing homes. In new construction, flush

installations are a popular alternative.

When placed over a finished floor, the floor protector

extends completely under the ventilated plinth. (Fig.

32) The cabinet is elevated by an amount equal to the

thickness of the floor protector so that the plinth and

cabinet are at the same level. This is necessary for a

proper fit between the WinterWarm front and the plinth.

If you raise the cabinet more than 1” (25 mm), a corre-

sponding increase in the height of the framed chase is

required to retain adequate clearance.

When the floor protector is installed flush, the Winter-

Warm cabinet rests on plywood shimming that brings it

level with the finished floor. (Fig. 33)

Whichever method you choose, the floor protector must

satisfy the requirements outlined above, and the 3” x

38” (76 x 965 mm) sheet metal spark protector strip

(included) must be laid under the junction of the cabinet

and the ventilated plinth.

Important Reminders:

1. INSTALL ONLY AS ILLUSTRATED.

2. Elevating the cabinet requires a corresponding in-

crease in the height of the chase to retain adequate

clearances. Refer to the chase specifications on

Page 20 and double-check that all clearances will be

satisfied.

3. The air inlet through the ventilated plinth must not be

blocked.

4. A 3” x 38” (76 mm x 965 mm) strip of sheet metal

(included in your Fireplace System) must be placed

as a spark protector painted-side up underneath the

joint between the front of the cabinet and the venti-

lated plinth.

FP1109

WinterWarm

raised hearth

4/05/01 djt

Over-laid Floor

Protector

24ga. Galva-

nized Sheet

Metal

Finished

Floor

Sub-floor

Ventilated

Plinth

Spark

Protector

Strip

Cabinet

Base

Plywood Shim FP1109

Fig. 32 The components of a raised hearth. The floor protec-

tor is placed over the finished floor and extends completely

under the ventilated plinth.

FP1110

WinterWarm

Flush hearth

4/05/01 djt

Inlaid Floor

Protector

24ga. Galva-

nized Sheet

Metal

Finished

Floor

Sub-floor

Ventilated

Plinth

Spark

Protector

Strip

Cabinet

Base

Plywood Shim FP1110

Fig. 33 The components of a flush hearth. The floor protector

is inlaid flush with the finished floor.

(K factor

of alternate

material)

(K factor of

Wonderboard)

(Thickness of

Wonderboard

required)

(Required thickness

of alternate material)

X =

(5.0)

(0.84) X (7/16” [11 mm]) = 2.6” (65 mm)

26

WinterWarm Fireplace Insert or System

2000941

Electrical Requirements

The WinterWarm Cabinet has a removable junction box

located on the bottom front corner of the left side. This

enables the wiring to be completed before the cabinet is

installed if desired.

The junction box houses two receptacles, one for the

WinterWarm column fans and the other for the optional

cabinet blower. The cabinet blower is especially recom-

mended when the WinterWarm will be installed in a

confined area that requires additional heat circulation.

A 115V, 15 or 20A electric service line is required. If in-

stalling the optional cabinet blower, decide on the loca-

tion for the blower control switch and mount a standard

single-switch box to the chase framing.

Customizing the Finished Appearance

The Trim Panels supplied with the WinterWarm System

fasten the cabinet to the chase framing and give a fin-

ished appearance to the gap between the WinterWarm

and the cabinet. They also provide a noncombustible

transition surface to join with the combustible wall finish

material, which must not extend inside the combustible

limits.

The trim panels may be used without additional facing

material, or with a surface to complement a specific

decor.

Many attractive, noncombustible finish materials can be

applied over the trim panels, including veneer brick, tile,

stone and plaster. The limitations are:

• The materials must be noncombustible.

• Their maximum thickness, including noncombustible

backing and adhesive, should not exceed 13/16”

(20 mm).

• Combustible edge molding must not protrude into

the room more than 2” (51 mm) from the panel sur-

face.

• To allow insertion of the fire box, the opening must

be at least 33¹⁄₄" (845 mm) wide, and 29" (737 mm)

high. To ensure coverage of the trim inner edges by

the installed WinterWarm fire chamber, the opening

must be not more than 35¹⁄₄" (895 mm) wide, and

33¹⁄₄" (845 mm) high. Figure 25 demonstrates these

dimensions.

Choosing a Facing Material

A variety of alternative facing materials can be used to

enhance the fireplace. Bear in mind, however, that the

total maximum thickness of any trim material, including

backing materials and adhesive is 13/16”. Here are a

few possibilities: (Refer to Figures 34-39 for detail.)

• Basic. The trim pieces, painted as desired, but other-

wise unadorned.

37³⁄₈"

(949mm)

FP11111

WinterWArm

wall finish material limits

4/5/01 djt

40³⁄₈" (1025mm)

Combustible

Limits

Notch for

Power Cord

FP1111

Fig. 34 Keep combustible wall finish materials outside these

limits.

29"

(737mm)

FP1112

WinterWArm

Min/Max wall facings

4/5/01 djt

33" (845mm)

33"

(845mm)

35" (895mm)

FP1112

Fig. 25 The fireplace opening must conceal the inner edges

of the trim as well as accomodate the insert.

• Plaster. A finish skim coat of plaster may be applied

over tile backer board or Wonderboard®, or over

expanded metal lath and a scratch coat.

• Stone. Marble, granite, soapstone, slate, or other

cut stone may be used. (Fig. 38) Stone may be ce-

FP1113

WW

basic trim

4/5/01 djt

Trim Piece

“J”

Bead

WinterWarm

Cabinet

FP1113

Fig. 36 Top view of basic metal trim.

27

WinterWarm Fireplace Insert or System

2000941

mented directly to the trim panels, or over noncom-

bustible backing to shim it out relative to the finished

wall surface. Be sure the height of the side pieces

is between 29” (740 mm) and 33¹⁄₄" (845 mm), and

that the thickness of backing, adhesive, and stone

combined is not more than 13/16" (20 mm).

• Tile. There are many tile options from which to

choose. Here is one method of determining a satis-

factory arrangement:

FP1114

WW

plaster trim

4/5/01 djt

Finish Coat

Backer Board

or Metal Lath

FP1114

Fig. 37 Top view of plaster flush-finished trim.

1. Draw the maximum and minimum fireplace open-

ing dimensions on a large sheet of cardboard.

2. Place it on the floor and experiment with laying

the tiles around the opening, varying within the

limits to determine the best arrangement.

3. Trace and cut out a silhouette of the insert. Lay it

over the tiles to show how the insert will cover the

tiles when it is installed.

4. On another large piece of cardboard, cut an

opening to represent the limits for combustible

material, and position that on top of the tile lay-

out. Keep in mind that while combustible material

must not be brought inside the combustible limits,

it is entirely permissible to extend noncombustible

facing materials beyond those limits to achieve a

particular decorative effect.

5. Despite the most careful planning and the latitude

provided by the maximum and minimum opening

dimensions, it still may be necessary to cut some

tiles to achieve a balanced appearance. Your tile

supplier or local tool rental outlet should be able

to supply the necessary equipment and explain

how to use it properly.

Consult your Vermont Castings dealer for advice and

suggestions for this process.

FP1114

WW

plaster trim

4/5/01 djt

Total thickness less

than 13/16” (20mm)

Observe

Combustible

Limits

FP1115

Fig. 38 Top view of stone facing material and wooden (com-

bustible) trim cemented directly to a noncombustible backing.

The trim must protrude no more than 2” (51mm).

FP1117

WW

tile/wood trim

5/23/01 djt

Observe

combustible

limits 2” (51mm)

maximum

Tile

Backer Board

FP1117

Fig. 39 Top view of tile and wooden (combustible) trim in-

stalled over backer board.

Use the Right Adhesives

The adhesive must be suitable to the chosen mate-

rial and have a temperature rating of at least 400°F

(204°C). High temperature silicone is an example.

Maintain a Safe Clearance to the Mantel

The clearance to the mantel and/or top trim must be at

least 43” (1090mm), measured from the finished hearth

surface. This clearance cannot be reduced by adding

shields.

28

WinterWarm Fireplace Insert or System

2000941

Prepare and Install WinterWarm Cabinet

1. Unpack the carton.

2. Install the flex connector. Install the flex connector

and attached flue flange to the underside of the cabinet

top using eight #10-1/2” hex head sheet metal screws.

The connector should point forward with the long axis of

the oval running from side to side. (Fig. 40)

4. Install the spark protector strip. To install the 3” x

38” (76mm x 965mm) spark protector strip, first draw a

line on the hearth parallel and 2” (51mm) in front of the

chase opening. Center the spark protector strip in the

chase opening, with the outside edge on the line. Nail

or screw the strip down, painted side up, so that the

fastener heads are flush with the surface of the spark

protector strip. (Fig. 42)

FP1118

Chimney connector

5/23/01 djt

Anchor Plate

Flexible Chimney

Connector

20° Offset Piece

Flue Collar

FP1118

Fig. 40 Proper position of the chimney connector, offset slip

piece and anchor plate.

3. Mark and drill the anchor plate. Fit the chimney

system anchor plate appropriate to your chosen pre-

fabricated chimney over the flue outlet at the top of the

cabinet and mark the attaching hole centers; remove

the anchor plate and drill the fastener holes. (Fig. 41)

Do not install the plate at this time.

FP1119

e

5/23/01 djt

Convection

Air Outlets

Front

Anchor Plate

Flue Opening

FP1119

Fig. 41 The anchor plate mounts on top of the cabinet and

secures the chimney to the chimney connector.

2" (50mm)

FP1120

Spark protector

5/23/01 djt

Chase

Spark Protector

FP1120

Fig. 42 Install spark protector.

5. Attach the trim pieces to the cabinet. (Fig. 43)

The parts supplied for this procedure include 16 sheet

metal screws and one each of the following: an up-

per trim panel, a left trim panel and a right trim panel.

You will also need an electric drill equipped with a 1/8”

(3mm) bit and a 5/16” (8mm) head driver, and a felt tip

pen for marking.

a. Align the 5 holes in the left trim panel with the cor-

responding holes in the left edge of the fireplace

opening on the cabinet. The notch in the flange

should align with the notch in the cabinet front, ap-

proximately 4” (102mm) from the bottom.

b. With the electric drill and the hex head driver, secure

the trim panel using 5 of the hex head sheet metal

screws provided.

c. Repeat this procedure to install the right panel.

d. Position the upper trim panel on top of the side pan-

els and centered on the face of the cabinet.

e. With the felt tip pen, mark through the 3 holes on

each flange of the upper trim panel on the cabinet,

and drill 1/8” (3mm) holes. Secure the panel to the

cabinet with 6 sheet metal screws.

29

WinterWarm Fireplace Insert or System

2000941

6. Move the cabinet into the chase and fasten the

trim panels to the chase framing.

NOTE: The chase floor must be the same height as the

hearth and must provide uninterrupted support. Push

the cabinet carefully into the chase opening until the

ends of the upper trim panel and the outer edges of the

side panels rest against the studs forming the front of

the chase. IMPORTANT: If the cabinet does not slide

easily into position, DO NOT force it; doing so could

damage the “standoffs” that ensure adequate clearance

from combustibles. Instead, double-check your framed

chase dimensions before proceeding to make sure you

have allowed enough clearance.

WARNING: DO NOT PACK REQUIRED AIR SPACES

WITH INSULATION OR OTHER MATERIALS.

a. Attach the upper trim panel. Refer to the combustible

limits illustration and the required dimensions, and

locate one hole through each end of the upper panel

into the studding behind. Make sure the holes are

located outside the combustible limits where they

will be hidden by wall covering or additional facing

material. Drill the holes, check carefully for square

one last time, and secure the panels with drywall

screws driven home to make flush with surface.

b. Attach the side panels. Drill 2 holes in each side

panel, also outside the combustible limit, and secure

the panels to the studding with additional drywall

screws.

NOTE: Drywall or other combustible wall covering ap-

plied to overlap the outer edge of the trim panels MUST

NOT extend inside the combustible limits. These limits

also apply to any combustible edge molding used to

trim the raw edge of the drywall.

In addition, combustible edge molding must not pro-

trude into the room more than 2” (51mm) from the panel

surface.

37³⁄₈"

(950mm)

40³⁄₈" (1026mm)

FP1122

upper trim panel ends

5/23/01 djt

Combustible

Limits

Notch for

Power Cord

FP1122

Fig. 44 Make sure you secure the ends of the upper trim

panels to studding located outside the combustible limits.

c. After the cabinet has been installed to its proper

depth, check all standoffs once again for proper

clearance. Screw the cabinet to the floor through the

eight drilled holes with eight of the #10 Phillips pan

head sheet metal screws provided.

d. Connect the electric service cable to the cabinet’s

junction box if the wiring has not previously been

completed. (NOTE: Since the cabinet’s junction box

is removable, the wiring can be done outside the

cabinet either before the cabinet arrives or after it

has been installed.)

Remove the cover plate from the junction box in the

cabinet. Pull the electric service cable (and the switch

cable if installing the optional Cabinet Convection

Blower Kit) into the cabinet junction box and wire the

junction box as shown in the illustration below.

Figure 45 shows the required wiring for an installation

using the optional cabinet convection blower kit. If your

installation does not use the optional blower, ONLY the

upper receptacle will be live.

Secure and tighten the strain relief.

e. Install the required chimney anchor plate to the top

of the cabinet. Use a 1/8” (4mm) bead of gasket cement

to seal the flange to the cabinet. Install the chimney

according to the manufacturer’s instructions; follow the

instructions exactly.

7. Install the air ducts. Before installing the air duct

boxes, you may wish to paint the inner surfaces with

high temperature stove paint (or other high temperature

paint) to reduce the glare from reflected light.

FP1121

front trim

Cabinet

Base

Notch

FP1121

Fig. 43 The trim panels fasten the cabinet to the chase fram-

ing and give the installation a finished appearance.

30

WinterWarm Fireplace Insert or System

2000941

Install the two air duct boxes in their framed openings.

(Fig. 46)

If desired, paint the inner surface of each air duct tube

for about 6” (152mm) to eliminate reflected glare; attach

this end to the air duct box flange.

Cut and fit the air duct tubing between the air duct

boxes and the top of the cabinet. NOTE: The duct-

ing used to connect the duct outlets on the enclosure

cabinet to the remote duct boxes is Class O/Class I.

Use no other class of ducting for this application. In

certain areas, local building codes may prohibit the use

of flexible ducting in enclosed spaces. In such cases it

is acceptable to use solid cutting that meets local code

requirements.

Cut the tubing a few inches too long with a serrated

kitchen knife - it can be compressed during installation.

The duct tubing must fit onto both the duct box and the

cabinet flanges the full length of the flanges 2” (51mm)-

all the way around.

Secure each end of the ducting to the appropriate

flange with three of the sheet metal screws provided.

Holes for the screws must be drilled first around the

perimeter through both the duct tubing and the flange

with a 1/8” (3mm) drill bit. Space the holes as evenly as

possible around the flange.

8. Install the elevated base. Slide the base into the

cabinet until it contacts the rear wall.

9. Install the optional cabinet convection blower kit.

The blower kit is an integrated unit housed in a metal

shell. ON the front side there is a flange perpendicular

to the housing. When properly installed, this flange

rests on the elevated platform and is fastened to it with

screws.

The back side of the blower housing has a flange that

rises parallel to the back side panel. This flange is fas-

tened with screws to the rear panel of the cabinet.

The power cord is routed to the left where it can be con-

nected to the lower receptacle of the cabinet junction

box.

10. Finish the wall surface surrounding the chase.

Cover the room’s wall area surrounding the chase with

a material of your choice, but carefully observe the

noncombustible limits as described in Step 6b - drywall

or other combustible wall covering applied to overlap

the outer edge of the trim panels must not extend inside

the combustible limits. These limits also apply to any

combustible edge molding used to trim the raw edge of

the drywall.

In addition, combustible edge molding must not pro-

trude into the room more than 2” (51mm) from the panel

surface.

12" (300mm)

Min.

FP1125

air ducts

Duct

Box

Duct Box

Ducting

Cabinet

Duct work

may not be

routed below

cabinet level

Trim Panel

Base

FP1125

Fig. 46 In addition to installation on the front, duct boxes may

be mounted on the sides of the chase or vented into adjacent

rooms, but in no case below the top of the cabinet.

FP1123

Junction box

5/23/01 djt

To switch for optional cabi-

net blower

Ground

Service

Cable

Upper Recep-

tacle for Insert

Firebox Fan

Lower receptacle

for cabinet blower

power cord only

Electrical

bridge

removed

Electrical

Bridge

FP1123/24

Fig. 45 Wiring for an installation using the optional cabinet

convection blower kit. When the kit is not used, only the upper

receptacle is live.

31

WinterWarm Fireplace Insert or System

2000941

Use drywall screws to fasten the wall covering to the

metal standoff and drywall stops at the cabinet. Drill

pilot holes through the wall covering material and one

thickness of the sheet metal with a #40 (.098”) drill bit.

Tape and fill holes and/or seams and decorate your

chase wall at this time.

11. Install the vent grilles. Position the cast grilles over

the duct box openings, and mark for the four screw

holes in each. Using a 5/32” (4mm) bit, drill through the

drywall and duct box flanges, and install the grilles with

the Phillips flat head black oxide screws.

Once the vent grilles have been installed, you are ready

to complete the installation by installing the fire cham-

ber and the front.

FP1126

Optional Blower

Optional

Blower

Elevated Base

Junction Box FP1126

Fig. 47 Slide the elevated base platform into the cabinet until

it contacts the back panel.

FP1126

blower housing

5/24/01 djt

Flange attaches

to cabinet rear

wall

Cabinet Convection

Blower Housing

Flange

attaches to

base

Convectiion

Blower Power

Cord

Elevated Base FP1127

Fig. 48 The cabinet convection blower in place behind the

base.

32

WinterWarm Fireplace Insert or System

2000941

Section V: Completing the WinterWarm Installation

Prepare and Install the

WinterWarm Firechamber

1. Uncrate the WinterWarm Fire Chamber. Uncrate

the WinterWarm Firechamber and place it mounted on

its shipping pallet about 24” (610mm) in front of its final

destination — a masonry fireplace if you’re installing the

Fireplace Insert, or the cabinet if you’re installing it as a

part of the Fireplace System. (If the pallet height does

not place the Fire Chamber slightly above the level of

the cabinet’s elevated platform in a Fireplace System

installation, the pallet itself must be raised.)

The WinterWarm firechamber is shipped with the

reversible flue collar in the rearmost position. The flue

collar MUST be in this position for use in the Fireplace

System.

DO NOT REVERSE THE FLUE COLLAR ON THE

FIRE CHAMBER IF YOU ARE INSTALLING IT INTO

THE CABINET OF THE WINTERWARM FIREPLACE

SYSTEM.

Locate the damper control handle in the parts bag on

top of the firechamber — it’s the biggest of the three

rods at 3/8” (9mm) — and screw it into place (refer to

Page 3, Fig. 27). Lift up on the handle and move it to

the left to open the damper. Open the fuel loading door.

NOTE: The door will not open unless the damper is

open.

Expose the levelling bolts (and lighten the Fire Cham-

ber for easier handling) by removing the load door, the

front grate bars, the ash grate, the ash pan, and the ash

door. (Fig. 49)

2. Install the Levelling Bolts. Remove the two 5/16”

(8mm) lag bolts that secure the WinterWarm to the pal-

let. Slide the WinterWarm forward on the pallet until the

front levelling screw holes are accessible; screw in the

missing front levelling screws (located in the finish bag).

All four levelling screws should be positioned so they do

not protrude below the plane of the shroud bottom.

3. Install an Optional Probe Thermometer. The

WinterWarm is designed to accept a catalytic probe that

monitors the temperature in the secondary combustion

chamber. Your dealer can provide details on the probes

that are available.

If you have purchased a probe, install it at this time.

Remove the twelve hex head sheet metal screws that

secure the WinterWarm shroud to its bottom panel and

the two 1/4-20 hex head cap screws on the flue collar.

Remove the probe plug from the upper center of the

cast WinterWarm back. Select a drill bit correspond-

ing to the size of the probe you have purchased; spin

the drill bit gently by hand through the exposed refrac-

tory material. Insert the probe carefully into the hole all

the way to the probe’s end. Route the probe lead right

or left, but on top of the rib cast into the WinterWarm

side, until the lead protrudes out the front. Replace and

refasten the shroud and the flue collar.

4. Install the Air Box of the Outside Air Kit. The

Outside Air Kit may be used with either the WinterWarm

Fireplace Insert or the WinterWarm Fireplace System,

and introduces outside air to the fire chamber for com-

bustion. Outside air for combustion is especially desir-

able in some modern, super-insulated homes that have

little air infiltration.

The kit consists of an air box, a 3” x 24” (76 x 610mm)

air tube for Fireplace System installations, and a flange

for connecting the pipe to the cabinet. The air box

mounts on the left side of the fire chamber, and may be

vented either from the rear or from the side.

IMPORTANT: When using the Outside Air Kit in a ma-

sonry fireplace installation, modifications to the fireplace

may be necessary. Be sure to meet with your local

building code inspector before beginning the installation

to determine whether your plans meet code require-

ments. Contact your local Vermont Castings’ Authorized

Dealer for advice.

Adhere to the following guidelines when installing the

outside air kit:

• Do not terminate the duct in a garage, attic, base-

ment, or near another fuel-fed appliance.

• No portion of the outside air duct may be higher than

the primary air inlet of the firechamber.

FP1128

Front view

close up

Front

Grate Bar

Ash Grate

Ash Pan

Ash Door

Door FP1128

Fig. 49 Expose the levelling bolts by removing these parts.

33

WinterWarm Fireplace Insert or System

2000941

• The outside air duct’s inlet must be lower than the

primary air inlet of the firebox, to prevent air infiltration.

• The air inlet must be covered by a wire mesh screen

with openings not larger than 1/4” x 1/4” (6 x 6mm) to

prevent rodents entering from the outside.

a. With the WinterWarm fire chamber on its shipping

pallet in front of either the fireplace or the installed

Fireplace System Cabinet, remove the four (4) screws

holding the outside air cover plate to the left side of the

WinterWarm shroud. You may discard the cover plate,

but save the four screws.

b. (Fireplace System only) Remove from the cabinet

the cover plates over the air supply port you will be us-

ing; leave the other port sealed.

There is an inner and an outer plate for each port, each

held in place by four sheet metal screws. The rear port

is located on the lower left section of the cabinet’s rear

panel, while the side port is on the left panel of the cabi-

net. Cut the insulation out of the uncovered hole with a

sharp utility knife. You may discard the plates, but save

the screws.

c. The outside air duct is shipped with a cover plate

over its access port for side venting. If your installation

will be side venting, remove the cover plate from the

side of the air duct and re-fasten it over the rear-venting

access port. (Fig. 50)

e. Loosely fasten the air duct to the shroud with two

screws (one upper front and one lower rear). Place a

level on the Outside Air Duct and level it before tighten-

ing these two screws.

f. Mark on the shroud the locations where you will drill

the four remaining holes to fasten the Outside Air Duct

(two upper and two lower holes). Remove the duct

from the shroud and drill holes in the shroud with a

1/8” (3 mm) drill bit. Install the Outside Air Duct on the

shroud using a total of eight screws. Check the level of

the Duct once more before tightening the screws.

5. Move the Fire Chamber all but a few inches into

its installed position.

FIREPLACE SYSTEM ONLY:

Push the Fire Chamber into the cabinet, leaving about

2”-3” (51 - 76mm) between the upper shroud flange and

the front face of the cabinet. Remove the pallet.

6. Connect the Outside Air Duct to the Air Box.

FIREPLACE SYSTEM ONLY:

After final installation of the WinterWarm into the cabi-

net, slide the outside air duct into the 4” (102mm) diam-

eter access port either in the rear or on the side of the

cabinet (depending on your preferred location for the

outside air delivery system), orienting the duct parallel

to the floor. (Fig. 51) Continue to insert the duct until its

crimped end plugs into the corresponding port in either

the rear or the side of the air box. Attach the air duct

flange to either the rear or the side of the cabinet with

the four remaining screws.

Complete the outside air adapter installation by secur-

ing the flange to the pipe. Drill 1/8” (3mm) holes in the

pipe through at least two of the four flange holes and

secure with sheet metal screws.

KT227

Outside Air Duct

5/21/01 djt

Air Box

Side-vent Cover Plate

3” (75mm) Air

Tube

Flange

KT227

Fig. 50 The outside air duct box may be vented to the rear,

as shown here, or from the side.

KT228

top view

outside air adapter

5/22/01 djt

Flue Collar

Shroud

Air Box

Air Tube

Flange

KT228

Fig. 51 The final connection of the outside air duct to the air

box is made once the fire chamber is in its final position.

d. Position the Outside Air Duct against the left side of

the shroud so that its control rod extends to the front.

The rod must be passed throught the latticework panel

when you install the front. (Refer to Page 32, Step 7)

34

WinterWarm Fireplace Insert or System

2000941

Prepare and Install the WinterWarm Front

Do not remove the WinterWarm Front from its ship-

ping container until the directions indicate to do so. The

installation of the front is much easier if you partially

assemble some of the components before removing it

from the container.

Refer to the Figure 52 for the location in the shipping

container of the various parts. Also clear a “grab-space”

nearby where you can keep handy the tools you’ll be

using (Phillips-head screwdriver, 11/32” (9mm) wrench,

7/16” (11mm) wrench, 9/16” (14mm) wrench and utility

knife) as well as the various parts you’ll be removing.

1. Open the Shipping Container. Remove the straps

securing the shipping container and then remove

its top. Among the parts you’ll see in the box is the

WinterWarm front (lying face down) a bubble-pack of

parts, and boxes containing the mantel and latticework

panels. To orient yourself for the following directions,

stand so that the bubble pack is nearest your feet and

the solid top cross-piece of the front (the “spandrel”) is

farthest away.

2. Unpack the Mantel, Latticework Panels, and Air

Dividers. Remove the large box on top containing the

mantel, and the two boxes beneath it containing the

latticework panels, and set them aside. Also remove

the two air dividers that are packed in the edge of the

carton next to the top of the front.

3. Loosen the Bolts in the Spandrel and the Top

Grille. The solid top cross-piece of the front (the “span-

drel”) is attached to the column sides with four bolts,

two per side. Also, the top grille of the front is secured

to the spandrel with two bolts. These fasteners should

be loosened (not removed) while installing the front so

that it will be easier to align the sides. These bolts must

be re-tightened once the sides are in their permanent

position.

4. Remove the Packing Straps and Discard Them.

These flat steel bars are secured by one bolt on each

side to the base of the column. Once you have re-

moved the bolts, lift the top of the WinterWarm front

and drag it slightly forward until it rests on the edge of

the shipping carton. This will create enough room in the

carton to slide the packing straps off the bottom of the

front column. The packing straps will not be used again

and may be discarded.

5. Unpack the Remaining Parts.

Slice open the bubble pack with your utility knife and

remove the electric cord, the hardware package, and

the two mantel end caps.

Open the boxes containing the mantel and latticework

panels and remove the contents. Set all of these items

aside.

6. Empty the Contents of the Hardware Package

onto your Grab Space.

7. Attach the Front to the Fire Chamber.

With assistance, lift the front into position against the

Fire Chamber, starting with the left side. Move it behind

the protruding load door hinge halves. Swing the right

side into position.

It may be necessary to adjust one of the levelling

screws to align the clevis of the front to the fire cham-

ber.

1

2

3

4

5

KT226

rod thru lattice

5/21/01 djt

Control

Rod

Correct

slot is

5th from

bottom

Latticework Panel

KT226

Fig. 53 To find the correct space in the latticework panel for

the outside air control rod, locate the second vertical row of

“diamonds” from the left and count five spaces up from the

bottom.

FP1130

WW front & parts

6/01

Spandrel

Top Grille Air Dividers (Do

not overlook

them!)

Steel-

band

Packing

Strap Winter-

Warm Front

Electric Cable

Hardware Pack

Mantel End Cap

FP1130

Fig. 52 The WinterWarm front and its related parts are shown

here after three separate boxes containing the mantel and

latticework panels have been removed. For easiest assembly

and installation, follow the sequence of the directions exactly.

Mantel End

Cap

35

WinterWarm Fireplace Insert or System

2000941

If you have installed the optional outside air kit, pass

the control rod through the latticework at this time. (Fig.

53)

Seat the front against the Fire Chamber assembly, and

attach with the six 1/4-20 X 3/4” (19mm) hex head cap

screws and washers that are provided. There are two

for each side and two for the top.

Make sure the front seats properly before tightening

the cap screws; the edge of the front should be almost

even with the side and top plates, protruding no more

than 1/16” (2mm).

Tighten the left and right sides before tightening the top

screws. Tighten the cap screws that attach the upper

grille. NOTE: If the front has been installed too far for-

ward, the door gasket may not make the required seal

and the fire may be difficult to control.

Step 8. Attach the Rheostat Rod Linkages

Untape the rheostat linkage rod from the left side of the

firechamber. Remove the nut from the threaded end.

Insert the rod end into the drilled hole in the rheostat le-

ver. The rheostat box is located on the inside of the left

front column. Thread the rod nut back on and tighten.

NOTE: The rheostat lever must be tilted towards the

outside of the left column in order to attach the nut.

After connecting the linkage, the lever must be tilted

towards the inside of the column before installing the

left column air divider. It remains in this inside position

during operation. (Fig. 54)

9. Connect the Wiring.

The two-pronged cable for column fans and the four-

pronged wireway cable connect to the metal wire boxes

on each side of the front with snap connector plugs, two

on each side. The power cord must be plugged in as

well.

First expose the receptacle for the power cord by re-

moving the metal plate on the wire box. It is secured by

two Phillips pan head machine screws. Also remove the

nylon cord set clamp from the top of the spacer on the

left wire box, and lay it aside for completing this step.

NOTE: The power cord always connects to the wire

box on the left side in Fireplace System installations.

For Fireplace Insert installations, it may connect to the

wire box on either the right side or the left.

Next, plug the power cord into the wire box receptacle.

Secure the cord by slipping the nylon cord set-clamp

over the cord and fastening it to the top of the spacer

with a 1/2” (13mm) Phillips pan head machine screw.

For Fireplace Insert installations that have the power

cord connected to the right side, mount the nylon cord

clamp and spacer on the right wire box rather than the

left.

Connect the two-pronged column fans plug and the

four-pronged wireway plug to the wire boxes on both

the right and left sides. (Fig. 55)

Plug the power cord into its electric service receptacle,

either a wall outlet in Fireplace Insert installations, or

into the cabinet junction box in Fireplace System instal-

lations. FIREPLACE SYSTEM NOTE: Remember,

connect the power cord to the UPPER receptacle in the

cabinet junction box. The lower receptacle will not be

live unless you are using the optional Cabinet Convec-

tion Blower Kit.

If you are unsure of how to make any of these connec-

tions contact your local Vermont Castings’ Authorized

Dealer.

FP1131

Rheostat wiring

7/01

Rheostat Rod

Linkage

Rheostat Lever

Rheostat Rod

Nut

Rheostat Box Shaft

Power Cord

4-Prong “Wireway” Plug

2-Prong Column Fan Plug

FP1131

Fig. 54 The rheostat lever must be tilted first toward the out-

side of the left column to attach the nut, and then tilted toward

the inside of the column before installing the left column air

divider.

Spacer

Nylon Clamp

FP1132

Snap connectors

7/01

2-Prong

Fan Plug

4-Prong Wire-

way Plug FP1132

Fig. 55 The snap connectors only fit their respective sockets.

36

WinterWarm Fireplace Insert or System

2000941

10. Install and Adjust the Controls.

The rods that operate the WinterWarm’s primary air,

fan, and damper should be installed before mounting

the column capitals and mantel. Two of the rods are

1/4” (6mm) and are controls for the fan and the primary

air. The third rod is 3/8” (9mm) and controls the damper.

Install the rods by following this procedure: (Fig. 56)

• Check for proper position of the hex nuts on the

threaded rods. The larger hex nut on the 3/8” (9mm)

diameter rod should be positioned all the way to the

end of the thread on the longer of the two threaded

ends. The two smaller hex nuts on the 1/4” (6mm)

rods should be positioned as follows: One should

be positioned as far up the thread as possible; the

other should stop approximately 1/2” (13mm) from

the end.

• Install the fan control rod by inserting the 1/4” (6

mm) diameter rod with the nut all the way at the end

of the thread into the bottom control lever on the

WinterWarm’s left side. Install the rod all the way up

to the nut.

• Tighten the hex nut against the lever.

• Thread the two remaining control rods into the re-

maining two control levers. The lever above the fan

control accepts the remaining 1/4” (6mm) rod; this is

the primary air control. The lever on the right side of

the WinterWarm accepts the 3/8” (9mm) rod; this is

the damper control.

When installing the damper rod, look from above at the

damper linkage. Note that the linkage should be flexed

towards the rear. Make sure the linkage is in this orien-

tation. The damper will not operated properly with the

linkage flexed to the front.

• Thread each rod into the lever until it reaches the nut.

• Tighten the two hex nuts against the levers. The pri-

mary air and fan controls will be offset 1/2” (13mm)

to allow for smooth adjustment.

11. Install the Air Divider.

Install the two vertical

sheet metal air dividers

which guide the incoming

and outgoing convection

air. (Fig. 57) They are not

interchangeable: the curved

flange goes downward and

faces the firebox. The two

punchouts go toward the

front.

Angle the front edge into

position in the notch at the

top of the column, while

guiding the curved flange at

the bottom so that it slides in

on top of the curved horizon-

tal flange that is cast into the

firebox side.

The top edge of the air

FP1133

controls

7/2/01 djt

Blind-Tapped Hole

Control Lever

Brass

Knob

1/2” (13mm)

Through-Tapped Hole

L-Bracket FP1133

Fig. 56 Adjsut the controls so the primary air control rod, on

the top, overhangs the fan control rod by 1/2” (13mm)

divider must be flush with the top of the boss in the cast

column, as shown in the circled area in Figure 58.

Push the rear edge in until the air divider is perpendicu-

lar to the column.

FP1135

air divider

top view

7/01

Cast Winter-

Warm Flange

Air Divider

Flange

2. Adjust

Bottom

Here

Boss Notch

1. Seat Here

3. Push in

Here

FP1135

Fig. 58 1. Seat entire length of air divider in notch. 2. Adjust

the seated air divider so its bottom flange is just above cast

flange of WinterWarm. 3. Push the opposite side of the air

divider so it snaps into place.

FP1134

air divider

7/01

FP1134

Fig. 57 Seat the entire

length of the air divider

in the notch between the

bosses shown here as a

dotted line.

Air

Divider

37

WinterWarm Fireplace Insert or System

2000941

12. Move the Entire Unit the final few inches into

the Cabinet.

Move the WinterWarm the final few inches into the

cabinet, making sure the surround panels are properly

aligned. If you are using the CFM Corporation Flex

Connector System, reach up into the flue collar area

to grasp the Starter Piece and pull it down into the flue

collar. Bend the retaining tabs 90° against the bottom of

the flue collar.

13. Install the Latticework Panels.

The two panels are not interchangeable. Each is la-

beled with a designating letter cast into the iron next to

the tab — “L” for left and “R” for right. The corner cut-

outs must be positioned on the back edge. The panels

are anchored at the bottom by a single tab that is

bolted on. (Fig. 59) At the top, the panels are retained

by the overhang of the mantel.

15. (Fireplace Systems only) Install the Plinth.

The plinth assembly consists of a pre-assembled plinth

center and front, two plinth end caps, two plinth connec-

tors, and six hex head screws (1/4-20 x 1/2” (13mm).

Invert the plinth center and front assembly on a flat

surface. Unpack the two end caps and invert them also,

placing one at each end. Make sure the decorative

fronts of the end caps are in line with the front of the

plinth. (Fig. 60)

Place the stem end of the plinth connector on the plinth

Lower the panel and seat it on the base so the anchor

tab locks behind the rib cast in the base plate. Secure

it in place temporarily by holding it or with tape until the

mantel is installed.

14. Install the Mantel.

Place the mantel flat side down on the floor. Lift the

mantel slightly and slip the drilled and tapped ends

of the column capitals under each end of the mantel.

Align the two tapped holes in each capital with the two

holes in each end of the mantel, and thread in two 3/4”

(19mm) hex head cap screws and two washers. Do not

tighten these cap screws with a wrench; leave them

finger tight. Use care during this assembly process,

especially with enamelled parts. Forcing the mantel or

capitals into position may cause chipping or cracking.

Install the mantel and capital assembly by raising it

into position and tilting it to the rear against the upper

shroud flange, with the flange on the shroud in front

of the back rib on the mantel. Push against the flange

slightly before lowering the front edge of the assembly

onto the upper trim piece.

with the connector hole centered over the tapped hole

in the plinth. The other two holes in the plinth connec-

tor should line up with the two tapped holes in the end

caps. (If they do not line up, remove the plinth connec-

tor and flip it over.)

Repeat this process for the other side. Attach the plinth

connectors with the six (6) hex head cap screws pro-

vided.

Set the assembled plinth in the upright position, in front

of and centered on the WinterWarm. Adjust the levelling

bolts on the bottom front of the fire chamber so that the

plinth will fit, slide the plinth into its final position, and

center it. Adjust the levelling bolts downward to lower

the WinterWarm onto the plinth.

Step 16. Replace the Ashpan and Ash Door, Front

Grate Bars, Bottom Grate and Load Door.

FP1136

Bottom anchors

7/01

Latticework

Panel

Corner Cut-out

Bolted-on Tab FP1136

Fig. 59 A single tab at the bottom anchors the latticework

panel, while the top of the panel is held in place by the mantel

overhang.

FP1576

plinth

4/05

Preassembled

Plinth Center/

Front

Plinth End

Cap

Hex

Head

Screws

FP1137

Fig. 60 Before attaching the end caps, make sure their

decorative fronts line up with the front of the plinth.

Preassembled

Plinth Center/

Rear

Plinth Connector

38

WinterWarm Fireplace Insert or System

2000941

119

119

124

119

120

50

49

46

45

47

47

46

57

66

31

40

30

734

127

39

17 32

33

32

18

17

27

22

26

28

25

128

24

29

140

11

41

8

2319a

21 19

104

57

96

98

97

102

99

88

13

88

56

99

101

81

103

105 36

90

92

94

93

89

94

67

68

69

65

140

125

59

6

3

59

12

5

54

36

12

1

111

113

112

75

105

14

106

54

7

34

34

15

40

57

2

76

2

73

85

66

2

62

2

63

72

71

34

34

79

135

33

133

60

61

60

37

55

35

38

126

38

53

52

52

53

51

57a

54

58

59

84

134

135

52

83

56

117

118

129

109

108

107

121 Assembled

(120 + 117 + 124)

123

4

115

114

110

7

54

54

86

131

13

64 54

2

10

9

0941

WinterWarm

Large parts

8/14/02 djt

141

0941

WinterWarm Large Insert

Model 2100

CFM Corporation reserves the right to make changes in design, materials, specifications, prices and discontinue colors and products at any time,

without notice.

39

WinterWarm Fireplace Insert or System

2000941

1. Bottom Only 1301150

2. 5/16 Fiberglass Medium Density (sold by the foot)

1203588

3. 3/8-16 x 2” Hex Head Leveller Bolt 1201742

4. 1/4-20 x 5/8” Phillips Flat Head Screw 1200865

5. Left Fan Heat Shield 1301151

6. Right Fan Heat Shield 1301152

7. 1/4-20 x 1/2” Hex Head Cap Screw 1201338

8. 1/4-20 x 1/2” Phillips Round Head Screw 1200894

9. Ash Grate 1301256

10. Bar Grate 1301275

11. Left Side Firebox 1301280

12. Half Hinge, Body Upper 1604281

13. 1/4-20 x 1/2” Hex Head Leveller Bolt 1201347

14. Right Side Firebox 1301264

15. Damper Door Interlock 1301299

16. Interlock Door/Damper Wire 1601568

17. 1/4-20 x 1³⁄₄” Phillips Flat Head

Screw Black 1200830

Primary Air Box Assembly

(Includes Item #’s 7,8, and 18 thru 34) 5000343

18. Primary Air Box 1301281

19. Thermostat Assembly 5005470

19a. Friction Spring 1201846

20. Jump Ring 1201985

21. Thermostat Disc 1301269

22. 1/4-20 x 5/8” Phillips Round Head Screw 1200896

23. Washer, Flat 1/4 #304 SS

.294 id x .63 od x .047 Thick 1202471

24. Ball Chain Fitting 1201972

25. #6 Nickel Ball Chain, 21 Balls,

Attach Chain @ 19 Balls (sold by the foot) 1201960

26. Thermostat Valve 1301268

27. Thermostat Flap 1301265

28. 7/16 x 5/8” Cotter Pin 1203027

29. Thermostat Flat Wire 1604503

30. Thermostat Acutator 1301258

31. 1/4-20 x 1/4” Socket Set Screw 1200417

32. Bell Crank 1301263

33. Crank Pin 1600524

34. Damper Tab 1601488

35. Thermostat Control Arm 1301284

36. 1/4-20 Plain Hex Nut 1203210

37. 3/8-16 Threaded Should Bolt,

1/2 x 1¹⁄₄” Body 1201319

38. Washer, Flat 1/2 SAE 1202491

39. Lower Thermostat Wire Link 1604501

40. #8-32 Hex Top Lock Nut 1203275

41. Upper Thermostat Wire Link 1604502

42. 5/16” Hole Plug 1201899

43. Firebox Back 1301251

44. Secondary Thermostat 1601489

45. 10-24 x 1/4” Phillips Pan Head Screw 1200980

46. Secondary Air Flap 1601490

47. Shim Ring, 18 Ga Nickel 1201986

48. Secondary Air Link 1601486

49. Secondary Air Coverplate 1604505

50. 1/4-20 x 3/8” Phillips Pan Head Screw 1200993

51. Firebox top 1301253

52. Control Shim 1604338

53. Control Spacer 1201781

54. Washer, Standard Flat 1/4 - Z

.313 od x .742 od x .06 Thick 1202474

55. 1/4-20 x 1” Hex Head Cap Screw 1201326

56. Gasket, 1/2” Low Density Black

(sold by the foot) 1203564

57. Tie Rod Set (includes 4 of 1601640

Tie Rods & 4 of 1203210 Plain Hex Nuts) 5007499

57a. 1/4-20 Top Lock Hex Nut 1203213

58. Flue Collar 1301276

59. 1/4-20 x 3/4” Hex Head Cap Screw 1201374

60. Refractory Assembly

(Includes #1602511 Access Panel) 1602510

61. Catalyst (Old PN 1602505 in a carton) 30001152

62. Lower Fireback 1301252

63. Upper Fireback 1301260

Upper Fireback & Damper Assy

(Includes Items #7, 34, 36, 63, 65,

69 to 72, 79 to 82) 5000044

64. 1/4-20 x 1” Hex Head Cap Screw - Black 1201376

65. 1/4-20 x 1¹⁄₂” Hex Head Cap Screw 1201386

66. 1/4-20 Nut Plate 1203105

67. Left Throat 1301296

68. Right Throat 1301297

69. Throat Clamp 1301298

70. 1/4-20 Square Nut 1203329

71. Damper 1301259

72. Gasket, 3/6” Low Density 6ND

(sold by the foot) 1203589

73. Damper Operating Rod 1604522

74. Washer, Thick Flat

.52 id x .875 od x .085 Thick 1202492

75. Damper Swing Arm 1301282

76. 3/16 x 1” Stainless Steel Damper Rod Pin 1201839

78. Washer, Flat 3/8 - Z

.442 id x 1 od x .074 Thick 1202488

79. Damper Swing Arm Retainer 1301270

80. Washer, Narrow Flat 1/4

.275 id x .5 od x .063 Thick 1202475

81. 1/4-20 x 3/4” Socket Head Cap Screw 1200461

82. 1/4-20 x 1¹⁄₄” Socket Set Screw 1200446

83. Damper Actuator Link Stop 1604507

84. Damper Actuator Link 1301283

85. Damper Rod Retainer 1301271

86. Door Air Manifold 1301274

Door Assembly (Includes Item #’s 13, 56,

87 to 92, 94 to 99, 101, 102, 103, 105) 5006079

WinterWarm Large Insert

Model 2100 (continued)

Item Description Part Number

Item Description Part Number

40

WinterWarm Fireplace Insert or System

2000941

87. Door 1301257

88. Half Hinge, Door (No pin) Upper 1604280

89. Glass Cassette (Approx. 22” x 13”) 5002617

90. Gasket, 3/16 Fiberglass 4ND Black 1203556

91. Glass Retainer, Lower 1601403

92. Glass Retainer, Upper (2 required) 1601409

94. 10-24 x 3/8” Phillips Pan Head Screw 1200985

95. Brass Trim, Top 1402504

96. Brass Trim, Left 1402505

97. Brass Trim, Upper Right 1402507

98. Brass Trim, Lower Right 1402508

99. 8-32 x 1/2” Phillips Flat Head Screw 1202041

101. 8-32 x 1¹⁄₄” Phillips Flat Had Screw

(Upper Brass Trim -Center Screw) 1202045

102. Handle Stub Assembly w/Shaft, Gold 5004273

103. Pawl Assembly Short Adjustment 30002362

104. 1/4-20 x 3/16” Socket Set Screw 1200415

105. 3/8-16 Top Lock Hex Jam Nut 1203290

106. Striker Plate 1301273

107. Ash Pan Assembly

(Includes Item #’s 108, 109) 5005746

108. Ash Pan Only 1601025

109. Ash Pan Cover with Handle 1601027

110. Ash Pan Bracket 1601039

111. Ash Pan Swing Pin, 3/8” od 1600523

112. 3/8-16 Hex Jam Nut 1203157

113. Washer, Narrow Flat 3/8 1202560

WinterWarm Large Insert

Model 2100 (continued)

Item Description Part Number

Shell Enamel Parts - WinterWarm Large Insert

Model 2100

Part Name Classic Sand Midnight

Mantel 1301278 1321278 1341278

Left Cap 1301289 1321289 1341289

Right Cap 1301290 1321290 1341290

Outer Trim 1301303 1321303 1341303

Spandrell II 30001401 30001403 30001405

Column II 30001402 30001404 30001406

Item Description Part Number

114. Ash Pan Door Clamp 1301272

115. Decorative Ash Door 1301277

116. 1/4-20 x 5/8” Hex Head Cap Screw 1201372

117. Shroud Top 1402445

118. Shroud Flue Connector Plate 1403363

119. #10 x 1/2 Phillips Pan Head

Sheet Metal Screw - Black 1202058

120. Shroud Sides and Back Assembly 1402450

121. Shroud Assembly

(Includes Item #’s 117, 120, 124, 119) 5000043

123. Shroud Bottom 1402448

124. Outside Air Cover 1402453

125. Wireway Assembly 5002779

126. Rheostat Contol 1301255

127. Lower Rheostat Wire Link 1604511

128. Upper Rheostat Wire Link 1604512

129. Spark Screen (Inserted in Door

after removing glass cassette) 1206343

131. Listing Label, UL, ULC, EPA, Safety N/A

133. Wire Handle 1/4” Diameter

(Fans & Thermostat) 1604504

134. Wire Handle 3/8” Diameter (Damper) 1604514

135. Gold Ball for Wire Handles 1602470

140. Fan Assembly 5002771

Fan Mounting Bracket 1601244

Silicone Suspension Tubes

for Mounting Fans 1601245

Washer, Flat #10 SAE 1202423

8-32 Hex Nut 1203273

8-32 x 2” Round Head Slotted Screw - Z 1201243

141. Handle Package Fallaway 0004349

41

WinterWarm Fireplace Insert or System

2000941

Appendix:Approved Chimney Components

9201

9216

9206

9219

9214

9221/9221SS

9217/9217SS

9264

9266

9244

9946

9980A

9980B

9980C

9959

9284

9268/9268SS

9251

9249

9250

9281

9252

9262*

9260*

Condensation Engineering

Corp.

Vitroliner HS-2100

Anchor/base plate

Wall band

Elbows

Chimney sections

Starter

Storm collar

Caps

8HS-AP

NA

8HS-6

8HS-12

8HS-18

8HS-24

8HS-36

8HS-015

8HS-030

8HS-AIS

8HS-FSA

8SC

8HS-RES

8HS-SBA

8F

8FT

8HS-CSA

8HS-RSA

GSW Building Product Co.

Model SC

Metal Fab, Inc.

Model TG

Security Chimneys,

Ltd.

Model ASHT

Selkirk Metalbestos

Model SSII

Simpson Dura-vent

Dura-Plus

American Metal Products

Ameri-Tec Model HS

8 SP

NA

8 L3

8 L2

8 L18

8 L1

8 L8

8 E15

8 E30

8 RSA

8 FC

8 CPR

8 CC

8 CPE

8BM

8F

8FPA

8FPB

8FA

8FB

8FBB

8ST

8S

8TG AP

NA

8TG 36

8TG 24

8TG 18

8TG 12

8TG 6

8TG A15

8TG A30

8TG IS

8TG RSH

8TG FSA

8TG SC

8TG C

8TG RC

8TG WB

8TG F

8TG 15

8TG F24

8TG FT

8TG RS

8TG SB

JSC 8 AP

NA

JSC 8 SA3

JSC 8 SA2

JSC 8 SA1

JSC 8 SE

JSC 8 AIS

JSC 8 FRS

JSC 8 FAIS

JSC 8 ASC

JSC 8 DRC

JSC 8 RC

JSC 8 WB

JSC 8 ATC

JSC 8 AAF

JSC 8 AF2

JSC 8 AF3

JSC 8 DCS

8H-SP

NA

8H-SCS36

8H-SCS24

8H-SCS18

8H-SCS12

8H-SCS6

8H-SEL15

8H-SEL30

8H-AJS

8H-RJS

8H-FJS

8H-WS

8H-CSC

8H-CRCA

8H-CGR

8H-CFF

8H-CFLC

8H-CFM

8H-CFH

8H-CFS

8H-SSL9

8H-SRL9

8T-AP

NA

8T-36

8T-18

8T- 9

8T- 6

8T- 3

8T-EL15

8T-EL30

8T-AIS

8T-JS

8T-WS

8T-TCS

8T-SC

8T-CT

8T-WB

8T-TF

8T-AF6

8T-AF12

8T-AF24

8T-AF36

8T-RSP

8T-FSP

*Can only

accept

chimney

above it, not

below.

Supports

Flashings

Firestops/shields

42

WinterWarm Fireplace Insert or System

2000941

Appendix: Catalytic Combustor

In any chemical reaction, including the combustion

process, there are certain conditions which must be

met before the reaction can take place. For example, a

reaction may require a certain temperature, or a certain

concentration of the reactants (the combustion gases

and oxygen), or a certain amount of time. Catalysts,

though not changed themselves during the reaction,

have the ability to act at a molecular level to change

these requirements. In the secondary combustion

chamber of the WinterWarm, the catalyst reduces the

temperature at which secondary combustion can start

from the 1000 - 1200°F (540 - 650°C) range to the 500

- 600°F (260 - 315°C) range, increasing efficiency, and

reducing creosote and emissions.

The catalytic reaction, though advantageous, does

have some limitations of its own. Primary among these

is that the reactants (the gases) come into close physi-

cal contact with the catalyst itself.

To ensure the necessary contact, the catalytic element

in your WinterWarm is composed of a ceramic base

in the shape of a honeycomb. On each of the honey-

comb’s many surfaces a coating of the catalyst (usually

a noble metal such as platinum or palladium) is applied.

The large surface area exposed in this configuration

ensures the combustion gases have the greatest oppor-

tunity to come in contact with the catalyst.

Loss of catalytic activity will be apparent in several

ways. First you may notice an increase in fuel con-

sumption. Second, there will be a visible increase

in the rate at which creosote builds up in your chim-

ney connector system. You may also notice a heavy

discharge of smoke from the chimney. There are a

number of catalytic problems which can cause loss of

activity:

Blockage

While the honeycomb pattern ensures good contact, it

also increases the resistance to flow of the combustion

gases, and, because of the many surfaces, provides

more places for creosote and fly ash to deposit. It is

important to follow the operating instructions in order

to minimize these deposits, and to periodically inspect

your catalyst for signs of blockage.

Masking and Poisoning

While the catalyst itself does not enter into the combus-

tion process, it is possible for certain elements, such

as lead and sulfur, to attach to the active sites on the

surface of the honeycomb. Though the catalyst is still

there, it is covered, or masked, by the contaminant,

and cannot function. To avoid this situation, it is im-

portant not to burn anything in your WinterWarm that

is a source of these contaminants. Particularly avoid

painted or treated wood, coal, household trash, col-

ored papers, metal foils, or plastics. Chemical chimney

cleaners may also contain harmful elements. The safest

approach is to burn only untreated, natural wood.

Flame Impingement

The catalytic element is not designed for exposure to

direct flame. If you continually overfire your Winter-

Warm, the chemistry of the catalyst coating may be

altered, inhibiting the combustion process.

Thermal degradation of the ceramic base may also oc-

cur, causing the element to disintegrate. Stay within the

recommended guidelines of the Operation section.

Mechanical Damage

If the element is mishandled, damage may occur.

Always treat the element carefully. Remember the cata-

lyst is made of a ceramic material; treat it as you would

fine china. Hairline cracks will not affect the perfor-

mance of the catalyst, as long as the steel sleeve holds

the element in the proper position.

Peeling

Peeling of the surface coat may occur if the catalytic

element is frequently subjected to excessive tempera-

tures. Follow the operating instructions carefully to

avoid this type of damage.

Every Vermont Castings’ product is equipped with either

a Corning “Long-Life”® or a Technical Glass Products

“Honeycomb”®. The products are equivalent. If for any

reason you must ship your catalytic element, remem-

ber its fragile nature. Place the element in a plastic

bag, and package it with a generous amount of shock

absorbing material.

43

WinterWarm Fireplace Insert or System

2000941

Warranty

Limited 3 Year Warranty

CFM Corporation warrants that this woodburning stove will

be free of defects in material and workmanship for a period

of three years from the date you receive it, except that the

catalyst, thermostat assembly, handles, glass door panels,

cement, and gasketing shall be warranted as described

below.

CFM Corporation will repair or replace, at its option, any part

found to be defective upon inspection by a CFM Corporation

Authorized Dealer. The customer must return the defective

part or the stove, with shipping prepaid, to the Authorized Deal-

er or pay for any Authorized Dealer in-home travel fees or ser-

vice charges for in-home repair work. It is the dealer’s option

whether the repair work will be done in the customer’s home or

in the dealer’s shop. If, upon inspection, the damage is found to

be the fault of the manufacturer, repairs will be authorized at no

charge to the customer for parts and/or labor.

Any woodburning stove or part thereof that is repaired or

replaced during the limited warranty period will be warranted

under the terms of the limited warranty for a period not to

exceed the remaining term of the original limited warranty or six

(6) months, whichever is longer.

Limited 1 Year Warranty

The following parts of the woodburning stove are warranted to

be free of defects in material and workmanship for a period of

one year from the date you receive it: The thermostat assem-

bly, handles, glass door panels, cement, and gasketing. Any of

these items found to be defective will be repaired or replaced at

no charge, upon the return of the part with postage prepaid to a

CFM Corporation Authorized Dealer.

Any part repaired or replaced during the limited warranty period

will be warranted under the terms of the limited warranty for a

period not to exceed the remaining term of the original limited

warranty or six (6) months, whichever is longer.

Exclusions & Limitations

1. This warranty is transferable; however, proof of original retail

purchase is required.

2. This warranty does not cover misuse of the this stove. Mis-

use includes overfiring which will result if the stove is used

in such a manner as to cause one or more of the plates to

glow red. Overfiring can be identified later by warped plates

and areas where the paint pigment has burned off. Overfir-

ing in enamel fireplaces is identified by bubbling, cracking,

chipping and discoloration of the porcelain enamel finish.

CFM Corporation offers no warranty on chipping of enamel

surfaces. Inspect your woodburning stove prior to accepting

it for any damage to the enamel.

3. This warranty does not cover misuse of the stove as de-

scribed in the Owner’s Guide, nor does it cover any stove

which has been modified unless authorized by a CFM Cor-

poration representative in writing. This warranty does not

cover damage to the stove caused by burning salt saturated

wood, chemically treated wood, or any fuel not recommend-

ed in the Owner’s Guide.

4. This warranty does not cover a stove repaired by someone

other than a CFM Corporation Authorized Dealer.

5. Damage to the unit while in transit is not covered by this

warranty but is subject to a claim against the common

carrier. Contact CFM Corporation Authorized Dealer from

whom you purchased your stove or CFM Corporation if the

purchase was direct. (Do not operate the stove as this may

negate the ability to process the claim with the carrier.)

6. Claims are not valid where the installation does not conform

to local building and fire codes or, in their absence, to the

recommendations in our Owner’s Guide.

7. The salt air environment of coastal areas, or a high-humid-

ity environment, can be corrosive to the porcelain enamel

finish. These conditions can cause rusting of the cast iron

beneath the porcelain enamel finish, which will cause the

porcelain enamel finish to flake off. This warranty does not

cover damage caused by a salt air or high-humidity environ-

ment.

8. CFM Corporation shall have no obligation to enhance or

update any unit once manufactured.

IN NO EVENT SHALL CFM CORPORATION BE LIABLE FOR

INCIDENTAL AND CONSEQUENTIAL DAMAGES. ALL IM-

PLIED WARRANTIES, INCLUDING THE IMPLIED WARRAN-

TIES OF MERCHANTABILITY AND FITNESS, ARE LIMITED

TO THE DURATION OF THIS WRITTEN WARRANTY. THIS

WARRANTY SUPERCEDES ALL OTHER ORAL OR WRITTEN

WARRANTIES.

Some states do not allow the exclusion or limitations of inciden-

tial and consequential damages or limitations on how long an

implied warranty lasts, so the above limitations may not apply to

you. This warranty gives you specific rights and you may have

other rights which vary from state to state.

How to Obtain Service

If a defect is noted within the warranty period, the customer

should contact a CFM Corporation Authorized Dealer or CFM

Corporation if the purchase was direct with the following infor-

mation:

1. Name, address, and telephone number of the purchaser.

2. Date of purchase.

3. Serial number from the label on the back.

4. Nature of the defect or damage.

5. Any relevant information or circumstances, e.g., installa-

tion, mode of operation when defect was noted.

A warranty claim will then start in process. CFM Corporation

reserves the right to withhold final approval of a warranty claim

pending a visual inspection of the defect by authorized repre-

© CFM Corporation

410 Admiral Blvd. • Mississauga, Ontario, Canada L5T 2N6

800-668-5323 • www.cfmcorp.com

CFM Corporation