Vermont Castings EWF36A Mounting instructions
Homeowner’s
Installation and
Operating Manual
20005167 5/13 Rev. 22
5167
EPA36
cover
3/02
2
Vermont Castings EWF36A
20005167
Thank you for purchasing a Vermont Castings, EWF36A replace. An efcient replace carefully engineered to bring you
the latest in wood combustion principles and modern foundry technology.
You can count on years of comfortable heating and pleasurable re viewing if you treat it properly and operate the
EWF36A according to the directions in this owner’s guide.
The EWF36A is listed by Underwriter’s Laboratories, and is in compliance with the standards set forth by the Federal En-
vironmental 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 EWF36A wood heater. This heater meets the US Environ-
mental Protection Agency’s emission limits for wood heaters sold after July 1, 1990. Under specic test conditions this
heater has been shown to deliver heat at a rate ranging from 11,000 to 68,600 Btu’s/hr.
For more complete details on the EWF36A performance and specications, please refer to Page 3.
The EWF36A is designed, tested and listed for burning wood. Do not burn other fuels.
Installation or service of this woodburning rep should only be completed by a qualied installer, preferably NFI or WETT
(Canada) certied.
Please read the appropriate sections of this manual before you install and use your EWF36A. For information on opera-
tion and maintenance of the EWF36A, refer to Pages 17 and 20.
The EWF replace can use 100% outside air with the AKMST Outside Air Kits installed.
Failure to follow these instructions may result in property damage, bodily injury or even death.
Introduction ................................................................ 2
Safety Information ..................................................... 3
Specications ............................................................ 4
Planning Information.................................................. 7
Installation ................................................................. 8
Operation ................................................................. 18
Maintenance ............................................................ 22
Replacement Parts .................................................. 27
Optional Accessories ............................................... 29
Warranty .................................................................. 31
Fuels used in gas, woodburn-
ing or oil red appliances, and the products of combus-
tion of such fuels, contain chemicals known to the State
of California to cause cancer, birth defects and other
reproductive harm.
California Health & Safety Code Sec. 25249.6
3
Vermont Castings EWF36A
20005167
Read all instructions and warnings carefully before starting installation. Failure to fol-
low these instructions may result in a possible re hazard and will void the warranty.
The EWF36A replace is a solid fuel, woodburning, heat
circulating replace.
Vermont Castings Group replaces and component parts
have been highly tested and will operate safely when
installed in accordance with instructions provided in this
manual. Carefully read and understand all instructions
beginning installation.
If you notice any damage to replace or component parts,
immediately report damage to your Vermont Castings
Group dealer.
Only use Vermont Castings Group components or the war-
ranty will be voided and a re hazard may be created.
Vermont Castings Group warranty will be voided by and
Vermont Castings Group disclaims any responsibility for
the following actions:
•
•
•
(except for chase
ashings as detailed in Vermont Castings Group
Chimney Top installation instructions).
•
•
Consult local building codes to ensure that you are in
compliance installing the replace.
This replace and chimney system must be vented to the
out-of-doors.
The replace should not be located in areas that create
drafts (ie: frequently opened doors and central heating
air inlets/outlets) that hamper the normal ow of air into
the re.
4
Vermont Castings EWF36A
20005167
Range of heat output*.................. 11,300 - 75,500 Btu/hr
Maximum heat output** ....... in excess of 100,000 Btu/hr
EPA emissions rating (g/h, catalytic) ........................ 2.4*
Area heated*** ................. Up to 2500 sq. ft. (558 sq. m)
Size of wood splits ......................18” - 24” (450-610 mm)
Fuel Capacity..............................................40lbs. (18kg)
Loading ................................................................... Front
Flue size ....................................................... 8” (200mm)
Fireplace weight .................................................. 741lbs.
Primary Air Control ..............................................Manual
Glass panel............................ High-temperature ceramic
Flue exit position........................................................Top
Blower rating................................. 160cfm. (115V, 60Hz)
*Under specic test conditions used during EPA emissions
standard testing.
**This value can vary depending on how the unit is oper-
ated, and the type and moisture content of the fuel used.
Figure shown is based on maximum fuel consumption
obtained under laboratory conditions and on average ef-
ciencies.
***These values are based on operation in building-code
conforming homes under typical winter climate conditions.
If your home is of nonstandard construction (e.g. unusu-
ally well insulated, not insulated, built under ground, etc.)
or if you live in a more severe or more temperate climate,
these gures may not apply. Since so many variables affect
performance, consult your Vermont Castings’ Authorized
Dealer to determine realistic expectations for your home.
" (25mm)
"6"
(16mm)
Recessed
Nailing
Flange
5167
EPA36 specs
1356O" Dia.
(343mm)
Rough Opening Width 43"
Rough
Opening
Height
Rough
Opening
Depth
6756M" (1708mm)
6756M" (1708mm)
4756O" (1207mm)
5/8" (16mm)
95" (2413mm)
27"
(686mm)
26"
(660mm)
856O"
(216mm)
(1092mm)
41" (1041mm)
4756O"
(1207mm)
5156O"
(1308mm)
36" (914mm)
41" (1041mm)
1456M"
(362mm)
1456M"
(362mm)
12(6"
(327mm)
4(6"
(124mm)
1256O"
(318mm)
Electrical
Access
Outside
Air
12(6"
(327mm)
EWF36A specications and framing.
5
Vermont Castings EWF36A
20005167
Fireplace and chase parts identication.
FP554a
FP554a
BFC
Fireplace and chase parts identification
circulating model
8/21/00 djt
Insulation methods shown are
optional for cold climate, not a
requirement for unit operation.
Termination Cap
Storm Collar
Pan Flashing
Draftstop
Batt Insulation
(cut out around
restop)
Firestop
Ceiling Level
Standoff
Metal Safety Strips
(1,2 or 3 pieces)
Batt Insula-
tion be
used in the
Chase.
Outside Air
Cover Plate
Andiron
Brick Ledge
6
Vermont Castings EWF36A
20005167
D
Rise
BG
H
B
Offset
C
E
6 FT.
G
H
A
Hearth
Floor
Chimney
Section
CHIMNEY FLUE EXIT
Elbow
FP269
MBUF
5/16/96
rev. 5/25
TCS8A
Support
Example 1 Example 2 Example 3
G + H cannot exceed 20 feet.
Air Space Clearances: “S” Series (3-wall) = 2” Min. to Combustibles
The following safety rules apply to
offset installations (letters correspond
with illustration above):
Height of the chimney is measured
from the hearth to the chimney exit.
EWF36A
Maximum: 50’
Minimum:
Without Elbows 17’0”
With 2 Elbows* 19’0”
With 4 Elbows* 21’0”
Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
The offset (rst) elbow of any pair does
not have straps.
FP269
The chimney cannot be more than 30˚
(45˚ in Canada) from the vertical plane in
any installation*.
The maximum length of the angled run
of the chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
A chimney support (Model TCS8A)
is required every 6 feet of angled run of
chimney. Chimney supports are required
for every 30 feet and 60 feet of vertical
chimney height above the hearth.
Determine the offset distance of your
chimney arrangement from the centerline
of the replace to the centerline of the
chimney where it is to pass through the
rst ceiling.
This offset distance may not be
your full offset distance. See Examples 2
and 3.
Chimney system requirements.
FP282
0 0 0 0 0 3” 11”
1 0 0 0 0 8¹⁄₄" 20"
0 1 0 0 0 11¹⁄₄" 25¹⁄₄"
2 0 0 0 0 13¹⁄₂" 29¹⁄₄"
1 1 0 0 0 16¹⁄₂" 34¹⁄₄"
0 0 1 0 0 20¹⁄₄" 40³⁄₄"
2 1 0 0 0 21³⁄₄" 43¹⁄₂"
0 0 0 1 0 26¹⁄₄" 51¹⁄₄"
0 1 1 0 0 28¹⁄₂" 55¹⁄₄"
1 0 0 1 0 31¹⁄₂" 60¹⁄₄”
0 1 0 1 0 34¹⁄₂" 65¹⁄₂"
0 0 2 0 0 37¹⁄₂" 70³⁄₄"
1 1 0 1 1 41¹⁄₂" 77³⁄₄"
0 0 1 1 1 45" 83³⁄₄"
0 1 2 0 1 47¹⁄₄" 87¹⁄₂"
0 0 0 2 1 51" 94"
0 1 1 1 1 53¹⁄₄" 98"
0 0 3 0 1 56¹⁄₄" 103¹⁄₄"
0 1 0 2 1 59¹⁄₄" 108¹⁄₂"
0 0 2 1 1 62¹⁄₄" 113¹⁄₂"
0 1 3 0 1 64¹⁄₂" 117¹⁄₂"
0 0 1 2 1 68¹⁄₄" 124"
0 1 2 1 1 70¹⁄₂" 128"
0 0 0 3 1 74¹⁄₄" 134¹⁄₂"
0 1 1 2 2 78" 140³⁄₄"
0 0 3 1 2 81" 146"
0 1 0 3 2 84" 151¹⁄₄"
0 0 2 2 2 87" 156¹⁄₂"
0 1 3 1 2 89¹⁄₄" 160¹⁄₄"
0 0 1 3 2 93" 166³⁄₄"
0 1 2 2 2 95¹⁄₄" 170³⁄₄"
0 0 0 4 2 99¹⁄₄" 177³⁄₄"
0 1 1 3 2 101¹⁄₄" 181³⁄₄"
0 0 3 2 2 104¹⁄₄" 186¹⁄₄"
0 1 0 4 2 107¹⁄₄" 191¹⁄₂"
0 0 2 3 2 110¹⁄₄" 196³⁄₄"
0 1 3 2 3 114" 203¹⁄₄"
0 0 1 4 3 117³⁄₄" 209³⁄₄"
0 1 2 3 3 120" 213¹⁄₂"
0 0 0 5 3 123³⁄₄" 220"
¹⁄₂
FP282
MBUF
5/26/96
Offset
Rise
30°
Return
Elbow
30°
Return
Elbow
30°
Offset
Elbow
30°
Offset
Elbow
7
Vermont Castings EWF36A
20005167
Determine how the chimney will be run, length of run and
chimney components required to complete the job. (Fig.
4) install a chimney below minimum heights.
In planning a chimney system, it is important to know:
1. The height of a chimney is measured from the hearth
to the exit point on the termination.
2. A chimney cannot be offset more than 30° from a verti-
cal plane.
3. A chimney may run straight up or it may be necessary
to offset it to avoid obstructions.
4. The maximum length of an angled run (total chimney
system) is 20 feet.
5. No more than 2 offsets (4 total 30° elbows in U.S./or
2 total 45° elbows in Canada) per replace may be
used.
6. A guy wire stabilizer is required for chimneys extending
more than 6’ (1.8m) above a roof line.
Major U.S. building codes specify a minimum chimney
height above the roof top. The “Ten Foot Rule” is a re
safety rule and not a draft rule. To ensure proper draft, it
is recommended that you always meet or exceed the “Ten
Foot Rule,” especially when installing a termination on a
high pitch roof. (Fig. 5)
The key points of the “Ten Foot Rule” are:
1. If the horizontal distance from the chimney to the peak of
the roof is 10’ (3 m) or less, the top of the chimney must
be at least 2’ (610 mm) above the peak of the roof, but
never less than 3’ (914 mm) in height above the highest
point where it passes through the roof.
2. If a horizontal distance from the chimney to the peak of
the roof is more than 10’ (3 m), a chimney height refer-
ence point is established that is on the surface of the roof
a distance of 10’ (3 m) from the chimney in a horizontal
plane. The top of the chimney must be at least 2’ (610
mm) above the reference point, but never less than 3’
(914 mm) in height above the highest point where it
passes through the roof.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
AC246
4/1/96
Reference
Point
AC246
Ten Foot Rule illustration.
Planning an installation is very important to ensure safety
and to save time and money. An installer must predeter-
mine where a replace will be set and how the chimney
system will be run.
If installing the EWF36CFTK at a later date and
if the hearth is being raised in front of the repalce, the
replace must be raised to the same height.
The replace is shipped with lifting handles attached to
each side with lifting straps. The lifting straps are
intended for ligting unit off of the skid and nal position-
ing. Unit should remain on skid until nal positioning. After
replace is in position, the lifting handle and straps may be
removed or left in place.
A replace may only be mounted on the following sur-
faces:
1. A at combustible surface.
2. A raised wooden platform.
3. A concrete block or other solid object placed beneath
each of the four (4) corners of the replace.
The replace be spaced 1” from a combustible back
wall and 1” from a combustible side wall or support. (Page
13, Fig. 17)
L1
L1
LTTOTAL
LENGTH
(LT)
INSTALLED
LENGTH
(L1)
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
FP288A
MBUF-INSTALLED LENGTH
Triple wall
1/28/99 djt
TRIPLE
WALL
81
818
83
84
FP288a
Installed lengths of chimney sections.
8
Vermont Castings EWF36A
20005167
The chimney system is supported by the replace for verti-
cal chimney heights less than 30’ (9m) above the hearth.
Chimney supports are required if the vertical height ex-
ceeds 30’ (9m). Locate chimney supports at ceiling holes
or other structural framing at 30’ (9m) heights. Spacing
between chimney supports exceed 30’ (9m). Use
Chimney Support Model TCS8A.
Support
provided by elbow straps fullls the support requirement
only if they are spaced as previously described. (A chimney
support is 2¹⁄₂" (64mm) long when installed.)
Angled chimney runs require a support every 6’ (1.8m) in
addition to the elbow straps. Chimney supports are used
for this function. (Fig. 6)
FP284a
TCS8A
8/21/00
Chimney Sup-
port Strap
TCS8A
FP284a
Chimney support installation.
A chase is a vertical box-like structure which encloses the
replace and/or chimney. Chases are typically built on the
outside of the house with replace opening cut into the
outer wall of a room. (Page 5, Fig. 2)
If you need help in determining replace location or how
the chimney system should be run, contact your Vermont
Castings dealer for assistance.
If you live in a cold climate, it is not required but
that you insulate replace enclosure to
eliminate cold air penetration as much as possible.
Insulate base of replace with a noncombustible insula-
tion rated for a minimum of 300° F. Insulating is
for outside wall installations over a concrete
slab. If replace is installed on a platform, insulation
should be placed on top of the platform replace
is set. (Fig. 7)
When a replace is installed in a chase or on an outside
wall, enclosure should be treated like any outside wall
in a home. Insulation should be installed on the inside
wall as well as the outside wall(s). In a chase, it is also
a good idea to install a restop at the rst ceiling level
above the replace and enclose the chase with sheeting
material. Insulation may then be installed above sheet-
ing material to assure the space around the replace is
totally protected. (Fig. 2)
When installing the chimney, caulk between
outer pipe and restop. It is vital that some air be allowed
to ow through this very thin gap.
FPC555a
Platform insulation
BFC model
8/21/00 djt
Hard
Flat
Surface
Insulation
Platform
FPC555a
Insulating between platform and replace.
9
Vermont Castings EWF36A
20005167
Framing can be constructed before or after the replace
is set in place, however, most installers build the frame
before setting the replace.
Frame replace with 2 x 4 lumber or heavier materials.
Refer to framing dimensions in Figure 1 for basic replace
specications.
Framing should be positioned to accommodate
wall covering and replace facing material.
Wiring should be installed by a certied electrician.
Turn off circuit breaker before wiring models.
Once replace is secured, complete wiring the fan kit.
Remove knockout in the center of the back of the EB1 and
install listed cable clamps. Feed electrical wire through
listed cable clamp leaving approximately six (6) inches of
wire exposed through the EB1. Secure listed cable clamp
to the wire.
Attach white wire from power source to one (1) wire of
receptacle and secure with nut. Attach black wire from
power source to the other wire of receptacle and secure
with nut. Be sure nuts are secured tightly.
Secure EB1 assembly to inside of electrical box coverplate
using two screws. Attach cover to face of the EB1 while
being careful to position excess wire completely within the
EB1, then attach coverplate to replace.
Since you have already planned the chimney run, you
should know exactly how the installation is to be accom-
plished - how much pipe is required, the number of elbows,
if any, and type of termination to be used.
Report to your dealer any parts damaged in
shipment, specically check the end connection of chimney
sections and elbows.
The EWF36A replace must use Vermont Castings
Group model triple wall 8” chimney components only. The
installation procedure described in this manual applies
only to this system.
To mark the centerline of the ue, put the replace in nal
position and measure out from the wall: 9¹⁄₂" (241mm). Mark
a spot on the ceiling directly above the replace. Draw a
line parallel to the back wall through this mark. (Fig. 8)
Using a plumb bob positioned directly over center point
of replace ue collar, mark the ceiling to establish the
chimney center point. (Fig. 8)
In order to clear an obstruction, it may be necessary to
offset chimney from vertical. This is accomplished by us-
ing elbows. Use the 30˚ Offset Elbow table on Page 6 to
determine proper offset and parts required.
Each offset requires two (2) elbows. The second elbow
is equipped with support straps. It is very important to
install the second elbow in each offset as close to the ceil-
ing or support as possible so that the elbow straps can be
secured to framing members to help support the weight
of the chimney.
Determine offset distance of your chimney arrangement
from centerline of replace to centerline of chimney where
it is to pass through ceiling.
Locate center point of the chimney on ceiling as though a
straight up chimney arrangement is to be used. Measure
your offset dimension from straight up chimney center
point on ceiling.
FPC556a
EPA36
LOCATE CENTER LINE
Circulating model
3/20/02 djt
956O"
(241mm)
Chimney Centerline
Actual Centerpoint
Plumb Line
Plumb Bob
Imaginary Cen-
terpoint
FPC556a
Locate centerline of chimney with plumb line.
10
Vermont Castings EWF36A
20005167
The size of the hole in ceiling will vary with the angle at
which the chimney passes through ceiling.
Drive a nail up through ceiling at marked chimney center
point. Go to oor above and see where hole will be cut.
Check to see where existing ceiling joists and other pos-
sible obstructions are located...i.e. wiring, plumbing etc...
If necessary, re-position chimney and/or replace to avoid
obstructions.
Cover replace collar opening and cut proper sized chim-
ney hole in chimney.
Frame the ceiling chimney hole as shown in Figure 10. It is
good practice to use framing lumber that is the same size
as the ceiling joists; this is a requirement at attic level.
The following table gives restop spacer model num-
bers:
FP551b
17 1/2"
Framing chimney hole
5/13/99 djt
Existing
Ceiling
Joists
17¹⁄₂”
(445mm)
17¹⁄₂”
(445mm)
Chimney
Hole
Ceiling
New Framing
Members
FP551b
Typical frame for ceiling chimney hole.
The of the frame the same
as the hole size selected from Figure 9 in order to provide
required the 2” (51mm) air space between the outside
diameter of the chimney and the edges of the framed
ceiling hole.
Slide replace into position.
Safety strips are used to ensure that any combustible ma-
terials in front of the replace are protected even though
a noncombustible hearth extension is required.
When the nished extended hearth is added, the top of
the nished hearth must be ush with the bottom of the
replace. “Z” shaped metal safety strips have been sup-
plied with the replace and are required for installation. The
safety strips provided have a 1” offset. For applications with
a greater offset, “Z” shaped strips will have to be fabricated
of metal. Overlap safety strips at least 1/2” to provide a
positive joint. The safety strips must also extend at least
1¹⁄₂” (38 mm) beyond the sides of the replace. (Fig. 11)
Safety strips are not required over noncombustible
oors where all supports at the base of the replace are
noncombustible.
Two (2) nailing anges are supplied with the replace. To
level the box and secure it rmly in place, remove the nail-
ing anges from the hearth and install at the sides of the
replace as shown in Figure 12.
WF557
BR
11/10/97
“Z” Metal Safety
Strips (1 or 2 pcs.)
“Z” Safety
Strip
Hearth Ext.
Fire-
place
Plat-
form
FP557b
1¹⁄₂”
(38mm) 1/2” Min.
Overlap
Safety strip installation.
Decorative
Hearth
Face
Angle of Chimney at Ceiling
Size of Chimney Vertical 30°
FS2A FS6A
8” Flue 17¹⁄₂” x 17¹⁄₂” 17⁷⁄₈” x 29⁵⁄₈”
(445 x 445 mm) (454 x 753 mm)
Ceiling chimney hole sizes necessary for installing
restop spacer.
11
Vermont Castings EWF36A
20005167
An outside air kit may be installed on the EWF36A. If de-
sired, or if local codes mandate the use of an air kit, then
two (2) AK-MSTs are required to complete the installation
(from air kit to the outdoors). If the outside air kits are to
be used, the AK-MSTs MUST be installed BEFORE the
replace is enclosed.
Air duct assemblies must be installed in conjunction
with the AK-MST or cold air will enter the home. (Fig. 14)
Four (4) inch Class 1 air duct, material or metal duct
(not supplied) may be used with AK-MST.
The duct termination should be located so it is exposed
to an out-of-doors opening at least 100 square inches. If
the duct termination must be located in a crawl space or
basement, be sure the termination area has 100 square
inches of ventilation opening to outside air.
The duct termination must be located so it does not
compete for air ow with exhaust fans, gas vent hoods
or other air consuming devices or appliances. It must
not be obstructed by rafters, insulation materials or other
obstructions. The less restrictive the air supply, the better
the AK-MST will perform.
It is a good practice to protect your hands and eyes during
installation by wearing work gloves and safety glasses.
Determine the location of the replace as described in the
replace Installation Manual. Then plan location of the
duct termination and the route of the duct run between the
replace and the duct termination.
Duct run must be limited to a maximum distance of 40 feet
from the replace pipe collar to duct termination. This will
provide the least restriction to air ow. No more than four
(4) 90° elbows can be used. Duct run may be horizontal,
vertical, inclined or any combination of these. Vertical duct
runs must be at least three (3) feet below the replace
chimney ue exit. (Fig. 13) You are now ready to install
the AK-MST Outside Air Kit.
FP1060
AKMST installation
7/6/00 djt
Duct Termination Must
be More Than 3’ Below
Chimney
40’ Max.
Duct Run
Duct Termi-
nation Ceiling
Attic
Duct
Exterior Wall
Rain Cap
Duct Termina-
tion
40’ Max. Duct Run
Duct
FP1060
Typical installations.
Fasten replace in position.
Nail Top Stand-
offs
Nail Side
Nailing
Flanges
FP1197
FP1197
EPA36
nailing flanges
3/20/02 djt
1. Remove and discard the outside air cover plate located
at the center of both sides of the replace. Use care not
to rub against the sharp edges of this opening to avoid
cuts. Remove the four (4) screws exposed when cover
plate is removed. Retain for future use.
12
Vermont Castings EWF36A
20005167
Start by attaching the rst chimney section to the collar on
top of the replace.
Install the pipe as pictured in Figure 16. When you get
a good lock, you will hear the pipe clearly snap together.
Once sections are snap-locked in place, it is extremely
difcult to get them apart.
When installing elbows, only outer pipe will snap- lock.
Middle pipes simply slide into position. Be sure to always
attach straps on upper elbow to a structural framing mem-
ber. (Fig. 17)
Continue installing the pipe as required until pipe is installed
up through the ceiling. At this point, you must install a
restop spacer.
FP270/271
CR Series
2/19/99 djt
Support Structure
Ceiling Hole
Framing
Elbow Strap
(must be tight)
Angled Firestop
Chimney Support Strap
(must be tight)
FP270/271
Attach straps to a structural framing member.
2. Slide the two (2) air duct assemblies provided with the
unit into the openings on each side of the unit. (Fig.
14)
3. Attach the air duct assemblies to the inside panel with
four (4) screws removed in Step 1. (g. 14)
FP1061
AKMST
rain cap
7/6/00 djt
Caulking
Wall
Duct Termination
Rain Cap
FP1061
Caulk and install duct termination/rain cap in place.
UP
FP1198
EPA Pipe install
Circulating models
3/20/02 djt
Pipe Section
Pipe
Rim
Hem
Lance
Pipe
Hem
FP1198
Install pipe, listening for the snap-lock to fasten.
&0
!IRDUCTASSY
Air Duct Assembly
AK-MST
FP1654
Air duct assembly.
4. Attach the inlet collar with four (4) #10 screws to the side
near the bottom of the replace. Slide the duct over the
collar and attach the duct to the collar using the plastic
tie straps or three (3) screws (screws not provided).
Continue attaching the ducting together using three (3)
screws at each joint until you have installed sufcient
duct to arrive at your duct termination location.
5. At the termination end, install the duct termination. This
should be installed from the outside of the home. Cut a
hole in the desired location approximately 4¹⁄₂” in (114
mm) diameter, caulk around the hole, and slide the
termination through the opening from outside the home.
The termination/rain cap should be caulked around its
perimeter to assure a tight seal. The rain cap opening
should be positioned downward. (Fig. 15)
The AK-MST Outside Air Kit is now installed and ready
for use.
13
Vermont Castings EWF36A
20005167
A restop spacer is used to keep pipe spaced properly and
required for safety.
Nail the restop spacer (at each corner) to the framing
members of the ceiling hole. A restop spacer is
not required at the roof.
Hole sizes listed in Figure 9 for angled restop spacers
provide minimum required air space to chimney pipe for
ceiling thickness up to 8” (203 mm). When combined
thickness of ceiling material, ceiling joists and ooring
material exceeds 8” (203 mm), adjustments must be made
in framing to assure that minimum air spaces to chimney
are maintained.
Figure 18 shows different installation procedures for both
an area that is an attic and an area that is not an attic.
If the area above the ceilingan attic, position the
restop spacer with the ange on the ceiling side and the
angled portion extending up into the hole.
If the area above the ceiling an attic, position the restop
spacer with the ange on the top of the framed hole and
the angled portion extending down into the hole.
Firestop spacers are not available for, nor are they required
on vertical walls.
put any sealant around the area where the outer
pipe slides through the restop spacer. If you seal this
area,
In Canada, an attic insulation shield is required to pre-
vent attic insulation from contacting the chimney section.
If the attic insulation shield is used, the restop is
not required in the attic installation. Framing dimensions
fr the chimney hole should measure 17¹⁄₂” x 17¹⁄₂” (445 x
445 mm). An attic shield MUST be installed on top of attic
joists (above the oor level). (Fig. 19)
In the U.S., it is a good idea, although not always
required, to install an attic insulation shield where blown-in
insulation is planned to be used in the atic.
IGF263
MBUF
5/9/96
Attic Insulation
Shield
Nails
(4 Required)
Attic Joist
Ceiling
Base Flanges
FP263
Attic shield installation (Canadian requirement).
Continue attaching pipe sections to complete system
to next level always being careful that the pipe is rmly
snapped locked in place before proceeding to next pipe
section.
If chimney supports are required, they are installed the
same as elbows. Nail chimney support straps to adjacent
structural framing, as shown on Figure 16. Bend straps
as necessary and make sure they are secure so they will
support the weight of the chimney. A chimney support is
2¹⁄₂" (64 mm) long when installed. Consider this dimension
when determining how many straight chimney sections
are needed.
Chimney supports are generally used in long runs
in a chase installation.
If you encounter additional ceilings, repeat same steps
required for rst ceiling installation. See restop illustra-
tion in Figure 18.
FP593
SR/C
11/20/97
Nails (4)
Joist
Firestop Spacer
Joist
Firestop Spacer
Nails (4)
FP593
Firestop spacer installations.
If the attic insulation shield is used, the
restop is not required in the attic installation.
14
Vermont Castings EWF36A
20005167
Run pipe to rooine. Since chimney system must be vented
to the out-of-doors, you use an approved Vermont
Castings Group termination.
If a chase is used, refer to the installation manual provided
with the termination cap.
Use same procedure detailed in locating center point of
the ue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
Size of roof hole varies with the type of chimney termina-
tion installed. Refer to installation instructions provided
with Vermont Castings Group chimney termination to nd
correct size of roof hole.
There must be a 2” (51 mm) air space between outermost
portion of chimney sections and any adjacent combustible
surfaces. (Combustible surfaces include burnable materi-
als such as: ceiling members, joists, ooring, combustible
insulation and roof structures.)
Mark an outline of the roof hole around the center of the
point nail. Hole dimensions given in the chimney
top installation instructions are dimensions;
therefore, the hole size must be marked on the roof ac-
cordingly.
Cover the opening of the installed chimney so debris can-
not get into the system.
Cut and frame the hole. It is good practice to use framing
lumber that is the same size as the rafters. Install the frame
securely because the chimney top and ashing anchored
to the frame must be able to withstand heavy winds.
Since you have already preplanned the height of your
termination according to the Ten Foot Rule, continue to
install pipe to the predetermined height.
Check the chimney top installation instructions for details
on how high above the roof top the chimney sections (all
pipes) should extend.
Follow the installation instructions provided with the chim-
ney termination you have selected.
FP1199
EPA36
AIR SPACES
circulating models
3/20/02 djt
Combustible framing material MUST NOT
penetrate AIR SPACE (shaded areas)
Standoff
2”
(51 mm)
Firestop
1” (25 mm)
Space to Back
1” (25 mm)
Air Space
to Sides
Wall
Shield
0” Clearance
to Floor
Hearth Extension
FP1199
Minimum clearances to combustibles.
1” (25 mm) Air
Space to Sides
Refer to Figure 2, Page 5 for an illustration of a typical
chase installation.
Treatment of restop spacers and construction
of chase may vary with type of building. These instruc-
tions are not a substitute for local building codes. You
check your local building codes to determine specic
requirements for your city or state. Other building
materials may be required in addition to Vermont Castings
Group Firestop Spacers.
All joints between the nished wall and the
replace surround (steel front) must be sealed with non-
combustible material to prevent cold air leakage into the
room. (Fig. 20)
15
Vermont Castings EWF36A
20005167
Finish the wall with material of your choice.
If a combustible material is used
below a at mantel shelf, consult your local building codes
for minimum clearance from top of replace opening to
bottom of mantel shelf.
All joints (top, bottom and sides) where wall or decorative
facing material meets replace surround must be com-
pletely sealed with a noncombustible material. (Figs. 21
and 25)
No side wall protection is required for replaces
installed at 45° to two (2) side walls (corner installation).
FP531
Fireplace surround detail
1/29/99 djt
Must be sealed with
noncombustible material
Mantel Shelf
Finished Wall
2 x 4 Stud
Standoff
Cast Front
See mantel drawing for
shelf-to-grille dimension
1” (25 mm)
Fireplace
Front (Steel) 2 x 4 Stud
FP1200
Finishing materials placement.
Brick Ledge
Noncombustible Finish Mate-
rial Only in this Area
The height that a combustible mantel is tted above the
replace is dependent on the depth of the mantel. This also
applies to the distance between the mantel leg (if tted)
and the replace.
For the correct mounting heights and widths, refer to Fig-
ures 22 and 23. When using paint or lacquer to nish the
mantel, such paint or lacquer must be heat resistant to
prevent discoloration.
FP1398
Combustible mantel minimum opening.
FP1398
wood mantels
8/18/03 djt
6"
(159 mm)
Min.
12"
(305 mm)
Min.
156O"
(38 mm)
12"
(305 mm)
Max.
Combustiible
Mantel and
Trim Finished Wall
Header
Standoff
Noncombustible
Material
Brick Ledge
GrilleOpening
Fireplace Front
MA81
Combustible mantel clearances.
MA81
rev. 8/5/97
*
156O"
Ref.
**
Combustible materials
are permitted within a
shaded area shown in
Figure 26 titled
Minimum Wall
Clearances
Adjacent combustible side walls that are within minimum
dimensions shown in Figure 25 of the replace opening
must be protected with a specically built wall shield as
described in Figure 20.
The special wall shield design described in Figure 20 is
an alternate method of adding protection to side walls Rt
must =1.85 minimum.
16
Vermont Castings EWF36A
20005167
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
2. EH2416, K = .458,
1 inch thick required.
A hearth extension is required to protect a combustible oor
in front of the replace. Refer to Figure 26 for minimum
dimensions and mounting detail.
The hearth extension described in Figure 26 must be a
durable noncombustible material with a minimum (total)
Rt value of 1.09; refer to Figure 24 for examples. The
overall height (above a combustible oor), depth and width
must be as indicated, with the extension centered to the
replace opening.
The top of insulation must be covered with a non-combus-
tible decorative covering a piece of .018” minimum sheet
metal, to protect hearth extension material. (Fig. 26)
Secure the hearth extension to the oor to prevent shift-
ing, using trim molding or other similar means at three (3)
outer edges. Seal crack between the replace hearth and
hearth extension with a noncombustible material. (Figs.
25 and 26)
Alternate noncombustible materials may be used providing
the (total) thermal resistance (Rt value) of the alternate
material employed is greater than or equal to R = 1.09
Thermal resistance (R) or thermal conductivity (K), may be
obtained from manufacturer of the material. Factors are
related by the formula K = 1/R. (Fig. 24)
T = given thickness
R = thermal resistance for a given thickness (T)
K = thermal conductivity
Noncombustible material with a lower R value may be
used, provided thickness of material is sufciently greater
to maintain an equivalent (total) thermal resistance (Rt).
To determine the thickness required for any mate-
rial:
FP550
BR/BC - SEALING
DETAILS
9/29/97
Wall Covering 2 x 4 Header - Do not
notch at standoffs
Noncombus-
tible Decorative
Facing
Seal all cracks between
replace surround
(steel) and wall materi-
als with noncombus-
tible material.
Cast Front
Noncombustible
Decorative Cover-
ing
Safety Strips - Must be
overlapped 1/2” minimum
FP1202
Sealing gaps.
COMMON MATERIALS AND FACTORS
MATERIAL K* R MINIMUM
THICKNESS
EH2416
Common Brick
0.916
5.0
1.09 .5 in.**
0.10 5.46 in.**
Micor 300
R Value is for 1/2 inch.
* Units of K = BTU/SQ FT/HR/˚F/IN
** Thickness of Listed Material
FP533ADD
Addendum
FP533ADD
Hearth extension material factors.
NEW K of new material (per inch) thickness
required = X of listed
thickness K of listed material (per inch) material
T (new) = 5.0/0.458 x 0.50 in. = (new required
thickness).
17
Vermont Castings EWF36A
20005167
FP1201
Combustible side wall protection and hearth extension dimensions.
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Minimum Hearth Extension Dimensions
(for On-Site Construction)
G
HG
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
"Z" Safety strips
must overlap
56O" minimum
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal
Fireplace
Opening
Combustible
Floor
956O" Required
FP1201
EPA combustible min.
3/20/02 djt
Firebox
Opening
A - Min. clearance
to combustible
perpendicular wall
B - Min. clearance
to combustible
perpendicular wall when
using noncombustible wall shield*
Side
Wall Side
Wall
F**
C**
E
E
D
4" Brick
(Example material)
Combustible material permitted within shaded area.
* Noncombustible wall shield requires 1" EH2416
insulation (minimum R Value = 1.85) between decorative
noncombustible rigid covering and combustible wall.
Minimum height and width is 40" x 40".
** Dimension/degree of angle will vary depending on thickness
of noncombustible surround facing.
4"
NOTE: No material may
cover black cast face.
Hearth extension must be
flush with bottom of fireplace.
1" Min.
1" Min.
EH2416 or
Equal "R" Value
Shaded area starts
1/2" away from
edge of unit
A B C D E F G H J
EWF36A 24” 12” 17° 25° 12” 8” 8” 18” 57”
610 mm 305 mm 305 mm 203 mm 203 mm 457 mm 1448 mm
18
Vermont Castings EWF36A
20005167
The fallaway handles are used to open and close the front
doors. Remove after each use so they will not get hot. Keep
in convenient location for each use. (Fig. 27)
Assemble the primary air control and damper handles by
passing the 3³⁄₈” screw through the ceramic shaft and into
the bright metal hub. Tighten carefully until snug. Do not
overtighten. Ceramic handle could crack. (Fig. 28)
5167
EPA36
cover
3/02
FP1397
Insert fallaway handles into door handle stubs.
Steel Handle
Fallaway Handle
Three controls regulate the performance of the EWF36A
replace: A primary air control supplies oxygen for the
re, the damper directs air ow within the replace and a
variable-speed fan control, or rheostat, regulates the warm
air ow into the room. (Fig. 29)
A single air control regulates the amount of heat the re
will produce and how long it will burn.
FP1396
EWF handles
8/14/03 djt
FP1396
Assemble primary air control and damper handles.
Screw
Ceramic Shaft
Metal Hub
The is located in the upper left corner
of the unit. (Fig. 27) It is the primary source of air for start-
ing, maintaining, and reviving the re.
Generally, more air entering the replace makes the re
burn hotter and faster, while less air prolongs the burn.
The air supply is open to the maximum when the control
lever is rotated clockwise, and closed when rotated coun-
terclockwise. To vary the burn rate, adjust the control to
the desired position in between these extremes; opening
the primary air control makes the unit burn hotter. Closing
the control slows the unit down. You may adjust to any
position you desire.
The is operated by moving the lever located in the
upper right corner of the unit. It has two positions: Open
to start or revive the re and closed, for normal operation
and to control burn rate. The damper is open when the
lever is fully rotated counterclockwise and pulled out and
closed when pushed in. When the damper is in the open
position, with the lever pulled out, and rotated fully in the
clockwise direction, the handle can ‘telescope’ back without
closing the damper or any damper movement. There are
no intermediate settings for the damper.
Full clockwise or counterclockwise movement of
the damper handle is approximately 50°.
Always open the damper before opening the doors.
Close damper to set burn rate.
FP1204
EPA36
controls
3/20/02 djt
Primary Air Control
FP1203
EWF36A controls.
Damper
19
Vermont Castings EWF36A
20005167
KT108b
BFC
Correct door position
8/23/00 djt
KT108b
Correct door position during operation.
Optional
Spark
Screen
Heated air from the replace is forced into the room by an
internal fan. The control for the fan is in the right corner
of the unit.
“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 setting
between “high” and “low.”
For best results, coordinate fan speed with the setting of
the primary air control. For example, when the air control
lever is set at “low,” also set the fan at “low.” With the air
control set for maximum heat, set the fan at “high.”
The EWF36A is intended for use with the doors fully closed
or fully open only when optional spark screen is installed.
(Fig. 30)
The EWF36A 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. ;
they often contain chemicals and metals that can damage the
catalytic combustor or pollute the air. Do not burn ocean driftwood;
when it burns, the salt it absorbs will attack the cast iron.
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, r, and redwood. These too
should be properly dried. Your EWF36A will accept wood
up to 24” (610 mm). Longer wood pieces work better than
short ones.
Wood should be stored under cover to maintain dryness,
and should be dried at least six months for optimum heating
and re-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 refuel-
ing and ash removal.
No single air control setting will t every situation. Each
installation will differ depending on the quality of the fuel,
the amount of heat desired, and how long you wish the
re to burn.
The control setting also depends on your particular installa-
tion’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
replace. On the other hand, too little draft can cause back-
pufng 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 uncontrollable
burn or a glowing-red part of the EWF36A 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 insufcient 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 EWF36A is designed so that it is possible to incorpo-
rate outside air for combustion. Directions for installing the
optional AK-MST outside air ducts are included with the
kits and beginning on Page 11 of this instruction.
When rst using the stove, keep track of the settings of
the air controls. You will quickly nd that a specic setting
will give you a xed 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.
20
Vermont Castings EWF36A
20005167
Most installations do not require a large amount of combus-
tion air, especially if adequate draft is available.
Minimize thermal stress by allowing the plates to adjust
gradually during an initial break-in re by following Steps
1-3 below.
1. Open the primary air control fully.
2. Open the damper.
3. Lay some crumpled newspapers on the bottom grate.
Place on the paper six or eight pieces of dry, nely-split
kindling. On the kindling lay two or three larger sticks of
split dry wood approximately 1-2” (25-51 mm).
Also, never use gasoline-type lantern fuel, kerosene, char-
coal lighter uid, or similar liquids to start or “freshen up”
a re in this heater. Keep all such liquids well away from
the heater while it is in use.
4. Light the newspaper and close the door. Gradually
build up the re by adding a few 3-5” (80-120 mm)
diameter splits.
If this is your initial break-in re, let the re burn brightly,
but not to excess. Control the re’s intensity by adjusting
the air control lever. After an hour or so stop adding wood
so that the re 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.
Continue until you have a live ember bed at least 2-3” (51-
76 mm) deep. This may take an hour or longer.
Some chimneys need to be “primed,” or warmed
up, before they will draw sufciently to open the damper. 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.
5. Once a good ember bed of at least 2-3” (51-76 mm)
has formed, let the re burn hot for an additional ten to
fteen minutes.
6. Close the damper and the primary air control to a
medium-low setting as described on Page 18. The re
volume will diminish immediately, but the replace will
continue to heat up. Maintain control of the re using the
primary air control, and remember: reduce the setting
for less heat, increase the setting for more heat. Refer
to the air control settings information on Page 18 for
recommended settings at different burn rates.
Overring may cause
a house re, or can result in permanent damage to the
stove. If an exterior part of the EWF36A glows, you are
overring.
• Open the damper and set the air control on “High,” and
wait at least fteen seconds for the draft to increase.
Open the door slowly.
• Check the ash level, and empty the ash pan if neces-
sary. Replace the pan.
• Add the fuel, smaller pieces rst. If it is necessary to
use wood smaller than the 24” (610mm) optimum size,
be sure to ll the rebox as completely as possible by
loading the wood pieces alternately on the left and
right. Split wood will ll the rebox more completely
and reduce the frequency of reloading.
If you have an ember bed of at least 2-3” (51-76 mm),
leave the thermostat set on “high” for 10-15 minutes. If the
ember bed is less than 2-3” (51-76 mm), you may have to
let it burn longer.
Finally, close the damper and adjust the air control and fan
speed for your desired heat level.
If the charcoal bed is relatively thick and your fuel
is well-seasoned, it is possible to add fresh fuel (smaller
pieces rst), close the door and damper, and reset the air
control within ve minutes.
The EWF36A is capable of producing in excess of 100,000
Btu’s/hour and heating an area of up to 2,500 sq. ft. (558 sq.
m) However, many factors affect heating performance and
can inuence the extent to which the EWF36A can heat
a given area.
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3
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