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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 number
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: The WMC36 may use MHSC model SK8, or
Model S (three wall) chimney systems. However, a
TWABR adapter collar is required when using the
Model S (triple wall) chimney system on this unit. The
WMC42 is designed to use only the "S" triple wall
chimney system. Either chimney system may be used,
but must not be mixed.
NOTe: To use the TWABR adapter on the WMC36,
remove and discard the cover plate on the top shield.
8)
(Fig.
Straight-Up Chimney Installation
To mark the centerline of the flue, put the fireplace in
final position and measure out from the wall: 9Z\v" (235
mm). 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 estab-
lish 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 MHSC elbows. Use the 30° Offset Elbow
table on Page 5 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 arrange-
ment from centerline of fireplace to centerline of chim-
ney 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.
20000583
WMC Series Woodburning Fireplace
Chimney Centerline
Actual Centerpoint
Fig. 11 Locate centerline of chimney with plumb line.
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 pos-
sible obstructions are located...i.e. wiring, plumbing etc...
If necessary, reposition chimney and/or fireplace to avoid
obstructions.
Cutting the Hole
Cover fireplace collar opening and cut proper sized
chimney hole in chimney. The SK8 pipe allows you to
run pipe through a typical 16" on center joist without cut-
ting joists.
9 Z\v"
(235mm)
Plumb Line
Plumb Bob
Imaginary Cen-
terpoint
FPC556
FPC556
WMC
LOCATE CENTER LINE
Circulating model
1/28/99 djt
9
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