MHSC WMC36 Operating Manual page 10

WMC Series Woodburning Fireplace
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure 13.
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 firestop spacer model num-
bers:
Angle of Chimney at Ceiling
Size of Chimney Vertical
8" Flue SKFS2A
"SK" Series 14Z\x" x 14Z\x"
(368mm x 368mm) (368mm x 648mm)
8" Flue FS2A
"S" Series 3-Wall 17Z\x" x 17Z\x"
(445mm x 445mm) (454mm x 753mm)
Fig. 12 Ceiling chimney hole sizes necessary for installing
firestop spacer.
The inside dimension of the frame must be the same
as the hole size selected from Figure 13 in order
to provide required air space between the outside
diameter of the chimney and the edges of the framed
ceiling hole. (1Z\x" - SK8; 2" - 3 wall)
See
Existing
Fig. 12
Ceiling
Joists
Ceiling
New Framing
Members
Fig. 13 Typical frame for ceiling chimney hole.
Positioning, Safety Strips,
Securing The Fireplace
Slide fireplace into position.
Lift the fireplace front slightly and slide the metal safety
strips under front bottom edge about 1Z\x" (38 mm),
allowing the remainder to extend in front of firebox.
Overlap strips at least 1/2" (13 mm) to provide a posi-
tive joint. (Flat safety strips are packed with fireplace.)
(Fig. 14)
10
30°
SKFS6A
14Z\x" x 25Z\x"
FS6A
17⁷\," x 29B\,"
See
Fig. 12
Chimney
Hole
FP551
WF551
BR/BC
9/29/97
Z\x" (13mm)
Min. Overlap
1Z\x"
(38mm)
FPC557
Fig. 14 Safety strip installation.
Safety strips are used to ensure that any combustible
materials in front of the fireplace are protected even
though a noncombustible hearth extension is required.
If fireplace is to be elevated above the floor, a "Z"
shaped metal safety strip must be fabricated and used
to protect combustible surfaces in front of the fireplace.
This "Z" shaped safety strip is not provided but must be
fabricated of metal with each horizontal leg at least 1Z\x"
(38 mm) wide and equal in length to the metal strips
provided with the fireplace.
Note: Safety strips are not required over noncombus-
tible floors where all supports at the base of the fireplace
are noncombustible.
Nailing flanges are integrated on the face of the fire-
place. To level the box and secure it firmly in place, bend
the nailing flanges and install as shown in Figure 15.
Fig. 15 Fasten fireplace in position.
Metal Safety
Strips
(1, 2 or 3 Pieces)
"Z"
Fire-
Safety
Place
Strip
(not supplied)
Plat-
Hearth Ext.
Form
FPC557
WMC Safety strip installation
circulatin models
1/29/99 djt
Nail Top
Standoffs
Nail Side-
Nailing
Flanges
FPC549
FPC549
Nail flange/standoff
circulating models
1/29/99 djt
20000583