Monessen Hearth WR400 - Manual (Page 12)

12
WR / WC Series Woodburning Fireplace
20014528
Continue installing the pipe as required until pipe is
installed up through the ceiling. At this point, you must
install a firestop spacer.
Installing the Firestop Spacer
in the Ceiling Hole
A firestop spacer is used to keep pipe spaced properly
and required for safety.
Nail the firestop spacer (at each corner) to the framing
members of the ceiling hole. NOTe: A firestop spacer
is not required at the roof.
Hole sizes listed in Figure 13 for angled firestop spac-
ers 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
flooring material exceeds 8" (203 mm), adjustments
must be made in framing to assure that minimum air
spaces to chimney are maintained.
Proper Firestop Spacer Installation
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 ceiling is not an attic, position the
firestop spacer with the flange on the ceiling side and
the angled portion extending up into the hole.
If the area above the ceiling is an attic, position the
firestop spacer with the flange 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 re-
quired on vertical walls.
DO NOT put any sealant around the area where the
outer pipe slides through the firestop spacer. If you seal
this area, it may cause a fire hazard.
Canadian Requirements
for Insulation Shield
In Canada, an attic insu-
lation shield is required
to prevent attic insulation
from contacting the chim-
ney section. NOTe: If the
attic insulation shield is
used, the firestop is not
required in the attic instal-
lation. Framing dimen-
sions for the chimney
hole should measure
14¹⁄₂" x 14¹⁄₂" (368 x 368
mm). An attic shield
MUST be installed on top
of attic joists (above the
floor level). (Fig. 19)
UP
FP558
BR
11/10/97
FP558
Fig. 16 Install pipe, listening for the snap-lock to fasten.
Pipe Section
Pipe
Rim
Hem
Pipe
Rim
Lance
FP270/271
CR Series
2/19/99 djt
elbow Strap
Angled Strap
Fig. 17 Attach straps to a structural framing member.
FP270/271
Support Structure
Elbow Strap
(must be tight)
Ceiling Hole
Framing
Angle Firestop
Chimney Support Strap
(must be tight)
Fig. 18 Installing firestop spacer.
FP593
FP593
SR/C
11/20/97
Attic Installation
Ceiling Installation
Nails (4)
Firestop
Spacer
Joist
Joist
Firestop
Spacer
Nails (4)
NOTe: If the attic insulation shield is used, the
firestop is not required in the attic installation.