EarthCore Isokern Standard Series, Инструкция по установке, эксплуатации, обслуживанию и руководство владельца, Страница: 21 / 25

Fire Brick Installation, Magnum 86072
Fire Brick Installation:
The manufacturer requires that the Magnum 86072
fireboxes be lined with a minimum one and one-eighth (1-1/8”) thick
fire brick on the back and floor of the firebox and four-inch (4”)
on the side walls. Thicker fire brick may be used as an option. The
pattern for the fire brick lining is an owner option. Standard N or S
type brick mortar is suitable mortar for the fireplace.
Fire brick mortar needs to be suitable to both adhere the
fire brick to the inside of the firebox and to create the finished face
joints of the brick work. Based on a history of field applications and
experience, a suitable mortar would be as follows:
Mix:
* 1/2 bag EC mortar or Six parts masonry mortar (S or N type)
* Six parts sand
* One part Fire Clay (optional)
* Water to a sticky, toothpaste consistancy
Because of different climates, the use of good masonry practices for
your area should also be considered.
It takes about 50 lbs. of mortar mix (dry measure) to fire-brick line a
Magnum 86072 fireplace.
Installation Instructions:
1. Wet mop the inside of the fireplace with a damp sponge
to remove dust and loose particles from the interior before fire-
bricking.
HINT: Dip each firebrick into water before applying.
2. Face joint dimensions of 1/4” to 3/8” in the brick work
is recommended and has the best appearance. Other face joint
dimensions are acceptable however smaller joints may not leave
room for heat expansion of fire brick.
3. Start the fire brick at the front edge of the floor of the
Isokern firebox, proceeding inward toward the back. Let the floor
brick gap approximately 1/2” off the back wall and side walls. This
air space allows heat expansion of the fire brick and is to be left
empty of mortar. (Figures 8 & 10)
4. Next, apply fire brick to the back wall of the unit. The
back wall fire brick covers the 1/2” expansion gap left at the brick
floor along the back wall of the firebox. (Figure 9)
5. Set the side wall fire brick by starting at the front edge
of the unit’s side wall and working inward toward the back wall
fire brick. The side wall fire brick, when completed, covers the 1/2”
expansion gaps where both the floor fire brick and the back wall fire
brick were held off the units side walls. (Figure 10)
All required through-wall accesses (gas and electrical line
feeds and combustion air supply access holes) should be drilled
before the required fire brick lining is installed.
Isokern makes no claims as to the performance of fire
brick or fire brick mortar(s). It is typical for heat stress cracks to
appear in the fire bricks in wood burning fireplaces.
FIRE BRICK
FLOOR AND
BACK WALL
(BUILT FIRST)
EXPANSION
1/2" GAP
FIRE BRICK FLOOR
(BUILT FIRST)
EXPANSION
1/2" GAP
(NO GAPS)
4” Firebrick
Required on
Side Walls
21