Low NOx Flat Flame TM Gas Burners
Instructions 4832-2
ROOF MOUNTING INSTRUCTIONS
HANDLE WITH CARE --refractories are brittle and fragile. Always set tiles on corrugated cardboard--gently.
FLEXIBLE AIR AND GAS CONNECTIONS are recommended for all installations to avoid strain on tile.
For good Flat Flame burner operation, it is essential that hot face of burner tile be flush with surrounding refractory . In curved wall or arch, part of burner tile will project through as shown in Figure 1.
In roofs more than 13" thick, where air pipe to 4832 Burner with a 9" deep tile will not clear outside face, a recess must be left to accommodate piping. Such recess is not required for 4831 Burners, since air pipe enters from rear. Flat Flame burner cover plates run hotter than conventional burner mountings, but their heat-resisting cast iron construction can withstand it. To avoid exces- sive heat buildup, insulating material debris should not be allowed to overlap cover plate.
Furnace wall or arch
Figure 1
Tile
SUPPORTING BURNERS*
A. Tapered tiles provide a simple means for supporting flat flame burners in arched roofs per Figure 1. B. 4832 Burners with conventional flangeless wall mountings can be suspended in the roof with a 4832BR (round) or 4832BS (square) suspen- sion adapter set (see Figure 2). Fabricated steel strap supports are suitable for 4831 Burners. Do not remove nuts that hold mounting plate to tile. Threaded shanks are long enough to permit use of a support strap and extra nut. C. An alternate method for 4832 Burners, suitable under certain conditions, is shown in Figure 3. Channels direct from the buckstays to the cover plate are usable only where they will not be subjected to excessive furnace heat of flue gases passing around edges of burner tile. This imposes two limitations: 1. Furnace pressure must be zero or negative at burner tile. 2. Furnace roof must be thin enough to permit pouring a 1 ½ " or 2" layer of lightweight castable over the step in the tile but not over the cover plate.
½ -13 36" long threaded rods (2 required)
11"
Use slotted holes in buckstay or rest channel on shelf
5 ½ "
Seal with lightweight castable
39"
Hard wall
10" or 14"
Figure 3
Figure 2
* See "Special Mountings" on Sheet 4832-6.
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