Majectic WMC36, WMC42 Owners Installation And Operating Manual
WMC Series
Woodburning Fireplaces
For Models:
WMC36
WMC42
Homeowner's Installation
and Operating Manual
For use in U.S./Canada
Underwriter's Laboratories
Report No. MH6018
DO NOT DISCARD THIS MANUAL: Retain for future use.
20000583 8/08 Rev. 22
WMC Series Woodburning Fireplace
Safety Information
PLEASE READ THIS MANUAL BEFORE INSTALLING AND USING FIREPLACE.
IMPORTANT:
Read all instructions and warnings carefully before starting installation. Failure to
follow these instructions may result in a possible fire hazard and will void the warranty.
Description
The WMC Series fireplaces are solid fuel, woodburning premium fireplaces. The WMC36/42 are circulating
models with removable grilles (louvers).
Both models are fully insulated fireplaces.
Precautions
MHSC fireplaces 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 before beginning
installation.
If you notice any damage to fireplace or component
parts, immediately report damage to your MHSC dealer.
Only use MHSC components or the warranty will be
voided and a fire hazard may be created.
MHSC warranty will be voided by and MHSC disclaims
any responsibility for the following actions:
• Installation by any other than a qualified in-
staller, preferably NFI or WETT (Canada) certified.
• Installation of any damaged fireplace or chim-
ney component;
Do not install a solid fuel burning insert or other products not specified for use with this fireplace.
Proposition 65 Warning:
ing or oil fired appliances, and the products of combustion 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
WARNING: Check with your electronics manufactur
er before installing a television or other electronic
device above this fireplace.
Fuels used in gas, woodburn-
Drafts
The fireplace should not be located in areas that create
drafts (ie: frequently opened doors and central heating air
inlets/outlets) that hamper the normal flow of air into the
fire.
Gas Logs
If you plan to install a gas log, the gas line should be installed before framing the fireplace. The gas line must be
installed by a certified gas line installer.
• Modification of fireplace, chimney assembly or
any component parts thereof; (except for chase
flashings as detailed in the Chimney Top installation instructions).
• Installation other than as instructed by MHSC;
or
Standard for Factory Built Fireplaces
WMC36 / WMC42
Listed
UL 127 / ULC-S610
• Installation and/or use of any component part
not manufactured or approved by MHSC in
combination or assembly with a MHSC fireplace system, notwithstanding any independent testing laboratory or other third party approval of such component parts or accessory.
Any such action may possibly cause a fire hazard.
Consult local building codes to ensure that you are in
compliance before installing the fireplace.
Fireplaces must be vented to the out-of-doors.
Do not obstruct or modify air inlets/outlets in any
manner.
Do not install combustible materials on any of the
black fireplace surround.
Burn only solid wood fuel or gas logs.
Safety Information . . . . . . . . . . . . . . . . . . 2
Specifications and Framing
Parts Identification
Chimney Requirements . . . . . . . . . . . . . 5
Planning Information . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . 7
Replacement Parts . . . . . . . . . . . . . . . . 18
Accessories . . . . . . . . . . . . . . . . . . . . . . 19
Table of Contents
. . . . . . . . . . 3
. . . . . . . . . . . . . . . . . 4
-
2
20000583
WMC Series Woodburning Fireplace
50" (1270mm)
42"
(1067mm)
35¹⁄₄" (895mm)
46" (1168mm)
⁵⁄₈"
(16mm)
⁵⁄₈" (16mm)
¹⁄₂" (13mm)
¹⁄₂"
19³⁄₄" (502mm)
1³⁄₄"
(45mm)
38" (965mm)
21"
(533mm)
7³⁄₄"
(197mm)
7¹⁄₂"
(191mm)
Recessed
Nailing Flange
13³⁄₈" Dia.
(340mm)
Rough Opening Width 47"
Rough
Opening
Height
Rough
Opening
Depth
Gas Line
Access
50" (1270mm)
70¹⁄₂" (1791mm)
8¹⁄₄"
(210mm)
22"
(559mm)
22¹⁄₂"
(572mm)
26¹⁄₄"
(667mm)
40³⁄₄"
(1035mm)
14⁵⁄₈"
(372mm)
15³⁄₈"
(391mm)
9¹⁄₂"
(241mm)
36⁵⁄₈"
(930mm)
3"
(76mm)
8"
(203mm)
7¹⁄₂"
(191mm)
Outside Air
Electrical
Access
11" Dia.
(279mm)
(1194mm)
Gas Line Access
8" Dia.
(203mm)
36" (914mm)
⁵⁄₈" (16mm)
¹⁄₂" (13mm)
¹⁄₂"
36"
(914mm)
35¹⁄₄" (895mm)
40" (1016mm)
⁵⁄₈"
(16mm)
19 ³⁄₄" (502mm)
1³⁄₄"
(45mm)
35¹⁄₂" (902mm)
21"
7³⁄₄"
(197mm)
7¹⁄₂"
(191mm)
Recessed
Nailing Flange
11" Dia.
(279mm)
Rough Opening Width 41"
Rough
Opening
Height
Rough
Opening
Depth
Gas Line
Access
47" (1194mm)
47" (1194mm)
66¹⁄₄" (1683mm)
8¹⁄₄"
(210mm)
22"
(559mm)
22¹⁄₂"
(572mm)
22" (559mm)
40³⁄₄"
(1035mm)
14⁵⁄₈"
(372mm)
15³⁄₈"
(391mm)
9¹⁄₂"
(241mm)
36⁵⁄₈"
(930mm)
3"
(76mm)
8"
(203mm)
7¹⁄₂"
(191mm)
Outside Air
Gas Line Access
Electrical
Access
8" Dia.
(203mm)
33³⁄₄" (857mm)
(1041mm)
WMC36 Series Woodburning Fireplace — Circulating Model
Fig. 1 WMC36 Series specifications and framing.
WMC42 Series Woodburning Fireplace — Circulating Model
Fig. 2 WMC42 Series specifications and framing.
20000583
FP590A
FP592A
3
WMC Series Woodburning Fireplace
A
B
C
Fig. 2a Hearth dimensions.
Chase Installation
Insulation methods shown are optional
for cold climate, not a requirement for
unit operation.
Batt Insulation
(cut out around firestop)
FP1531
Front Width Back Width Depth
A B C
WMC36 33
¹⁄₂" 18¹⁄₄" 20¹⁄₄"
(851 mm) (464 mm) (514 mm)
WMC42 39
⁵⁄₈" 18¹⁄₄" 15¹⁄₄"
(1007 mm) (464 mm) (387 mm)
Termination Cap
Storm Collar
Pan Flashing
Firestop
Ceiling Level
Standoff
Nailing Flange
Gas Line Access
(both sides)
Electrical Access
Outside Air
Cover Plate
Draftstop
Top Shield
Surround
Outlet Grille
Damper
Control
Gas Line Knockout
(both sides)
Screen
Grate
Firebox
Fig. 3 Fireplace and chase parts identification.
4
Inlet Grille
Metal Safety Strips
(1, 2 or 3 pieces)
FPC554
20000583
D
RISE
B
G
H
B
OFFSET
C
E
6 FT.
G
H
A
HEARTH
FLOOR
CHIMNEY
SECTION
CHIMNEY FLUE EXIT
ELBOW
30˚
OFFSET
ELBOW
30˚
OFFSET
ELBOW
30˚
RETURN
ELBOW
30˚
RETURN
ELBOW
SKCS8
SUPPORT
Example 1 Example 2 Example 3
Illustration Key
OFFSET
RISE
The following safety rules apply to
offset installations (letters correspond
with illustration above):
A. Height of the chimney is measured
from the hearth to the chimney exit.
Maximum: 90' 90'
Minimum:
Without Elbows 12' 6" 12' 6"
With 2 Elbows* 15' 0" 15' 0"
With 4 Elbows* 21' 0" 21' 0"
B. Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
The offset (first) elbow of any pair does
not have straps.
* In Canada, two (2) SK845 are allowed.
Fig. 4 Chimney system requirements.
WMC Series Woodburning Fireplace
Chimney Requirements - Offset Installations
Notes: G + H cannot exceed 20 feet.
Air Space Clearances: SK8 (2-wall) = 1¹⁄₂" and "S" Series (3-wall) = 2"
C. The chimney cannot be more than 30˚
(45˚ in Canada) from the vertical plane in
any installation*.
D. The maximum length of the angled run
of the total chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
E. A chimney support (Model SKCS8,
TCS8A - 8 inch triple wall) is required
every 6 feet of angled run of chimney.
Chimney supports are required for every
30 feet and 60 feet (SK8 pipe) or 20 feet
and 40 feet (3-wall pipe) of vertical chimney height above the hearth.
Determine the offset distance of your
chimney arrangement from the centerline
of the fireplace to the centerline of the
chimney where it is to pass through the
first ceiling.
NOTE: This offset distance may not be
your full offset distance. See Examples 2
and 3.
WMC36 WMC42
FPC269
IWF282
30˚ Elbow Offsets
Chimney
1'
3' 4'
1¹⁄₂'
0 0 0 0 0 3" 11"
1 0 0 0 0 8
0 1 0 0 0 11
2 0 0 0 0 13
1 1 0 0 0 16
0 0 1 0 0 20
2 1 0 0 0 21
0 0 0 1 0 26
0 1 1 0 0 28
1 0 0 1 0 31
0 1 0 1 0 34
0 0 2 0 0 37
1 1 0 1 1 41
0 0 1 1 1 45" 83
0 1 2 0 1 47
0 0 0 2 1 51" 94"
0 1 1 1 1 53
0 0 3 0 1 56
0 1 0 2 1 59
0 0 2 1 1 62
0 1 3 0 1 64
0 0 1 2 1 68
0 1 2 1 1 70
0 0 0 3 1 74
0 1 1 2 2 78" 140
0 0 3 1 2 81" 146"
0 1 0 3 2 84" 151
0 0 2 2 2 87" 156
0 1 3 1 2 89
0 0 1 3 2 93" 166
0 1 2 2 2 95
0 0 0 4 2 99
0 1 1 3 2 101
0 0 3 2 2 104
0 1 0 4 2 107
0 0 2 3 2 110
0 1 3 2 3 114" 203
0 0 1 4 3 117
0 1 2 3 3 120" 213
0 0 0 5 3 123
Support
Offset
Rise
¹⁄₄" 20"
¹⁄₄" 25¹⁄₄"
¹⁄₂" 29¹⁄₄"
¹⁄₂" 34¹⁄₄"
¹⁄₄" 40³⁄₄"
³⁄₄" 43¹⁄₂"
¹⁄₄" 51¹⁄₄"
¹⁄₂" 55¹⁄₄"
¹⁄₂" 60¹⁄₄”
¹⁄₂" 65¹⁄₂"
¹⁄₂" 70³⁄₄"
¹⁄₂" 77³⁄₄"
³⁄₄"
¹⁄₄" 87¹⁄₂"
¹⁄₄" 98"
¹⁄₄" 103¹⁄₄"
¹⁄₄" 108¹⁄₂"
¹⁄₄" 113¹⁄₂"
¹⁄₂" 117¹⁄₂"
¹⁄₄" 124"
¹⁄₂" 128"
¹⁄₄" 134¹⁄₂"
³⁄₄"
¹⁄₄"
¹⁄₂"
¹⁄₄" 160¹⁄₄"
³⁄₄"
¹⁄₄" 170³⁄₄"
¹⁄₄" 177³⁄₄"
¹⁄₄" 181³⁄₄"
¹⁄₄" 186¹⁄₄"
¹⁄₄" 191¹⁄₂"
¹⁄₄" 196³⁄₄"
¹⁄₄"
³⁄₄" 209³⁄₄"
¹⁄₂"
³⁄₄" 220"
20000583
5
WMC Series Woodburning Fireplace
L
1
L
1
L
T
MODEL SK
2 WALL
CHIMNEY
TOTAL
LENGTH
(L
T
)
INSTALLED
LENGTH
(L
1
)
SK81
SK818
SK83
SK84
"
"
"
"
"
"
"
"
TRIPLE
WALL
81
818
83
84
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
Reference
Point
Planning Information
Preplanning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a fireplace will be set and how the
chimney system will be run.
Mounting the Fireplace
A fireplace may be mounted on the following surfaces:
1. A flat 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 fireplace.
The fireplace
must be spaced 1/2" (13 mm) from a
combustible back wall and 1/2" (13 mm) from a combustible side wall or support. Refer to Page 14, Figure
18.
Planning the Chimney Run
Determine how the chimney will be run, length of run
and chimney components required to complete the
job. (Fig. 4) Never install a chimney below minimum
heights.
The Ten Foot Rule
Major U.S. building codes specify a minimum chimney
height above the roof top. The “Ten Foot Rule” is a fire
safety rule and not a draft rule. It is recommended that
you always meet or exceed the “Ten Foot Rule,” especially when installing a termination on a high pitch roof.
(Fig. 6)
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' (609 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
reference 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' (609 mm) above the reference point, but never
less than 3' (914 mm) in height above the highest
point where it passes through the roof.
Fig. 5 Installed lengths of chimney sections.
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
vertical 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' (6 m).
5. No more than 2 offsets (4 total 30˚ elbows in U.S./
or 2 total 45˚ elbows in Canada) per fireplace may
be used.
6. A guy wire stabilizer (not provided) is required for
chimneys extending more than 6' (1.8 m) above a
roof line.
6
FP288A
AC246
Fig. 6 Ten Foot Rule illustration.
20000583
WMC Series Woodburning Fireplace
Chimney Supports
The chimney system is supported by the fireplace for
vertical chimney heights less than 30' (9 m) above the
hearth. Chimney supports are required if the vertical
height exceeds 30' (9 m) with SK8 chimneys or 20' (6
m) with 3-wall chimneys. Locate chimney supports
at ceiling holes or other structural framing at 30' (9 m)
(SK8) or 20' (6 m) (3-wall) heights. Spacing between
chimney supports must not exceed 30' (9 m) (SK8)
or 20' (6 m) (3-wall). Use Chimney Support Model
SKCS8 (SK8) and TCS8A (3-wall). (NOTE: The
chimney support cannot be mounted directly to
the fireplace.) Support provided by elbow straps ful-
fills the support requirement only if they are spaced as
previously described. (A chimney support is 2¹⁄₂" 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. 7)
Chase Installation
A chase is a vertical boxlike structure which encloses
the fireplace and/or chimney. Chases are typically built
on the outside of the house with fireplace opening cut
into the outer wall of a room. (Page 5, Fig. 3)
If you need help in determining fireplace location or
how the chimney system should be run, contact your
MHSC dealer for assistance.
Installation
Insulating Fireplace Enclosure
for Cold Climates
If you live in a cold climate, it is not required but
highly recommended that you insulate fireplace
enclosure to eliminate cold air penetration as much
as possible.
Insulate base of fireplace with a noncombustible
insulation rated for a minimum of 300°F. Insulating
is very important for outside wall installations over
a concrete slab. If fireplace is installed on a platform,
insulation should be placed on top of the platform
before fireplace is set. (Fig. 8)
When a fireplace is installed in a chase or on a
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 firestop at the
first ceiling level above the fireplace and enclose the
chase with sheeting material. Insulation may then be
installed above sheeting material to assure the space
around the fireplace is totally protected. (Fig. 3)
When installing the chimney, DO NOT caulk between
outer pipe and firestop. It is vital that some air be allowed to flow through this very thin gap.
CAUTION: WHEN INSTALLING A FIREPLACE IN
AN INSULATED ENCLOSURE, BE SURE ALL REQUIRED AIR SPACES ARE MAINTAINED. (Page 13,
Fig. 18)
Chimney Support Strap
Chimney
Support
Fig. 7 Chimney support installation.
20000583
FP284
Cover Plate
Top Shield
Hard, Flat
Surface
Insulation
Platform
Fig. 8 Insulating between platform and fireplace.
FPC555
7
WMC Series Woodburning Fireplace
Green
White
Black
White
O
FF
LO
W
Framing
Framing can be constructed before or after the fireplace is set in place, however, most installers build the
frame before setting the fireplace.
Frame fireplace with 2 x 4 lumber or heavier materials.
Refer to framing dimensions in Figures 1 and 2 for
basic fireplace specifications.
NOTE: Framing should be positioned to accommodate wall covering and fireplace facing material.
Install Electrical Connection
Black
Wall
Junction Box
(not supplied)
Ground
Ground Screw
Variable Speed Control (optional)
Wire Nuts
(supplied)
CAUTION: ALL WIRING SHALL BE DONE BY A
QUALIFIED ELECTRICIAN AND SHALL BE IN
COMPLIANCE WITH ALL LOCAL, CITY AND STATE
BUILDING CODES.
IMPORTANT: To prevent electrical shock, the house
power must be disabled. This can be accomplished by
positioning the circuit breaker to off.
The fan kit assembly and model EB1 junction box are
factory installed.
NOTE: Check local building codes to determine if a
junction box is required at the romex pigtail/house wire
connection.
Install Variable Speed Control
The SCVS Variable Speed Control is tested and safe
when installed in accordance with these instructions.
Read all instructions before beginning installation. Follow instructions carefully.
The SCVS speed control may be used as an alternate
wall switch in lieu of the single pole (Listed 1.5 Amp
120V) switch described in the fan or fireplace installation instructions.
Installation Instructions
For mounting the speed control, a 2" deep standard
electrical box should be used. Using wire nuts supplied with the speed control, connect control in series
with fan motors and line voltage. Refer to Figure 9 for
wiring diagram.
Mount speed control in electrical box and attach wall
plate with screws provided. Push on knob so that indicator is in OFF position. (Fig. 10)
Operation
Turn control knob counterclockwise until a click is
heard for OFF position. To operate fans, turn knob
clockwise and adjust fan speed as desired.
Ground
Stud
Fireplace
Junction Box
Fig. 9 SCVS wiring diagram.
Electrical Box
(not supplied)
Speed Control
Flat
Head
Screw
Wire Nut
Fig. 10 Speed control mounting.
Receptacle
FP1212
Cover
Plate
Oval
Head
Screw
Plastic
Knob
FP1213
8
20000583
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