CFM Corporation ODSHR42 - Manual (Page 9)

9
ODSHR Outdoor Woodburning Fireplace
20002264
Locate center point of the chimney on ceiling as though
a straight up chimney arrangement is to be used. Mea-
sure your offset dimension from straight up chimney
center point on ceiling.
Ceiling Chimney Hole/ Possible Obstructions
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 floor above and see where hole will
be cut. Check to see where existing ceiling joists and
other possible obstructions are located...i.e. wiring,
plumbing etc... If necessary, re-position chimney and/or
fireplace to avoid obstructions. 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, 2 or 3 for
basic fireplace specifications.
NOTE: Framing should be positioned to accommodate
wall covering and fireplace facing material.
Chimney Set-Up
Since you have already preplanned the chimney run,
you should know exactly how the installation is to be
accomplished — how much pipe is required, the num-
ber of elbows, if any, and type of termination to be used.
CAUTION: REPORT TO YOUR DEALER ANY PARTS
DAMAGED IN SHIPMENT, SPECIFICALLY CHECK
THE END CONNECTION OF CHIMNEY SECTIONS
AND ELBOWS.
NOTE: ODSHR Series Fireplaces must use CFM Cor-
poration model 11CF, 11 inch, 2 wall chimney systems.
The installation procedure described in this manual
applies only to the 11CF system, chimney components
may not be mixed.
Straight-Up Chimney Installation
To mark the centerline of the flue, put the fireplace
in final position and measure out from the wall 11¹⁄₈"
(283mm). Mark a spot on the ceiling directly above the
fireplace. Draw a line parallel to the back wall through
this mark. (Fig. 11)
Using a plumb bob positioned directly over center point
of fireplace flue collar, mark the ceiling to establish the
chimney center point. (Fig. 11)
Offset Installation
In order to clear an obstruction, it may be necessary
to offset chimney from vertical. This is accomplished
by using CFM Corporation 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
ceiling or support as possible so 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 fireplace to centerline of chimney
where it is to pass through ceiling.
FP556SHR
Fig. 11 Locate centerline of chimney with plumb line.
FP556SHR
SHR
LOCATE CENTER LINE
5/11/99 djt
Chimney Centerline
Actual Centerpoint
Plumb Line
Plumb Bob
Imaginary
Centerpoint
11¹⁄₈"
(283mm)