16
WMC Series Woodburning Fireplace
20000583
COMMON MATERIALS AND FACTORS
MATERIAL
K*
R
MINIMUM
THICKNESS
EH2416
Micor 300
Common Brick
0.458
5.0
1.09 0.50 in.**
0.10 5.46 in.**
R Value is for 1/2 inch.
* Units of K = BTU/SQ FT/HR
/˚F/IN
** Thickness of Listed Material
FP533ADD
Addendum
6/1/99 djt
8/4/99 changed .2 to .1
one inch to 1/2 inch djt
Fig. 25
Hearth extension material factors.
FP533ADD
NEW
K of new material (per inch)
thickness
required = ------------------------------------
X of listed
thickness
K of listed material (per inch)
material
example of Determining Hearth extension equiva-
lents
To determine the thickness required for any
new
mate-
rial:
example for Common brick
T (new) = 5.0 / 0.458 x 0.50 in. =
5.46 in.
(new required
thickness).
FP550
BR/BC - SEALING
DETAILS
9/29/97
Wall Covering
Noncombustible
Decorative
Facing
Noncombustible
Decorative
Covering
Seal all cracks
between fireplace
surround and wall
materials with
noncombustible
material.
Seal crack
between fireplace
and hearth extension
with noncombustible
material.
2x4" Header -
Do not notch at
standoffs.
Safety Strips -
Must be overlapped
Z\x
" minimum.
Hearth Extension
Insulation
Side View
FP550
Fig. 26
Sealing gaps.
How to Operate Your Fireplace
Your fireplace can provide countless hours of pleasure and
security. However, use your fireplace carefully because
any time you build a fire inside a house, a problem may
develop.
Open Flue Damper
The flue damper is meant to be closed only when the fire
is completely out and the fireplace is not in use. This pre-
vents the loss of room air up the open flue. Remember, the
damper must be in the “open” position when refueling.
Damper:
The WMC Series fireplace flue damper is
“opened” and “closed” by a knob located just below the
top outlet grille. (Fig. 27) The damper is adjustable and
may be adjusted to the partially open notch as long as the
glass doors are closed and smoke buildup does not occur
in the firebox. Most efficient operation is obtained in the
partially open position. When refueling, fully open damper
before opening glass doors.
Fig. 27
WMC Series damper control positions.
MD706-1
MD-100
WM Series Damper Control
3/5/99
OPEN DAMPER BEFORE CLOSING DOORS
CLOSED
PARTIALLY
OPEN
FULLY
OPEN
CAUTION: Use 1 of 3 damper settings, DO NOT
set damper between positions shown.