last modified: July 8, 1996
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| Apply Sairset to the soaps that will be under oven sidewalls. Make
sure that you have adequate foot scaffold, and install large oven casting
as shown. Use a helper, being sure to set oven straight down vertically
onto back in order to compress gasket. |
View from rear. |
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| Project back brick ¾" as shown to form ledge for millboard. |
Form notches as shown for 1 inch millboard. Make notches slightly over
1 inch to allow for irregularities when sliding in millboard. The easiest
way to cut these notches is to make 2 or 3 saw kerfs and pop piece out
with brick hammer. |
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| Continue as shown |
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Seal horizontal gap between lower channels and heater with a bead of
silicone
Install middle channels onto a bed of Sairset.
Strap middle channels or use tie wire. When strapping, compress expansion
joint gaskets no more than 50%.
Clean off joints from inside. Make sure there is no mortar bridging
at the expansion joints from inside.
Install top channels and brace temporarily as shown. |
Right channels not shown for clarity. |
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At this point, a height adjustment is necessary.
Place a pencil mark 4-7/8" from the top on all 4 channel ears.
Next, measure the height of 4 existing courses of firebrick. Using this
distance, place a second mark on all 4 ears as shown.
The second mark indicates the top of the next course. If an adjustment
greater than 1-1/4" needs to be made, insert a course of splits. If
the adjustment is less than 3/4", use ordinary brick mortar. For 3/4"
to 1-1/4", use castable refractory. Alternativerly, you can cut the
bricks to height on a brick saw. |
Slide in 24 ½" x 12" millboard. Rip firebrick split and insert
into oven back notch to form retainer for millboard as shown. |
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Install ceiling transitions. They should be 1/16" to 1/4"
higher than side channels. Also install 4-½" ceiling transition extensions
(not shown).
(Continued)
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