750-297
Profire E/LNE Series Manual
2-5
Installation
2.4 — Installation
2.4.1 - General
The installer will need asbestos-free high-temperature-rope gasket, ceramic fiber blanket (e.g. Kaowool, Cerafelt),
tack spray and masking tape not provided with the burner.
Proper burner operation requires the burner to be installed so that the burner and blast tube are level.
For maximum safety, mating surfaces between the heat exchanger, dry oven and burner must be sealed to
prevent escape of combustion products into the boiler room.
Do not rely on the boiler front plate to fully support the burner. Securely support the burner pedestal to stable
flooring. The factory provides a nominal length burner support leg but variations in job-site floor heights may
require additional support to the reach the floor (see Figure 2-1).
Provide enough clearance in the burner mounting area to allow the burner housing to hinge fully open for service
and maintenance.
2.4.2 - Refractory Dry Oven
The burner may have been purchased with either a custom refractory dry oven sized for a specific heat exchanger
or a standard refractory dry oven sized per Figure 2-3. If a refractory dry oven was not purchased with the burner,
the installer must provide one.
The dry oven provides an initial combustion area required for flame stability so a third-party refractory must
follow the dimensional requirements of Figure 2-3. Scaling the Figure 2-3 outer diameter dimension "A" and
depth dimension "F" is allowed to best fit a specific heat exchanger.
The housing must be supported when in the open position to prevent damage to the hinges and other components.
The heat exchanger may have areas within the furnace susceptible to heat damage and may require furnace liner tile
and refractory cement filler to adequately protect those surfaces. Specific installation requirements for such
circumstances are beyond the scope of this manual.
For firetube applications:
(a)A dry oven built for a specific application shall have an outer diameter ½" less than the firetube's interior diameter
(Figure 2-3 dim "A"). This gap is required for the soft pack described later in the dry oven installation section.
(b)The firetube must be thermally protected at least 2.5 inches beyond the tube sheet.
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Caution
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Caution
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Caution
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