Combustion Air Supply Information - Honeywell r7284 Operator's Manual

Schedule Maintenance Program
The new design of flame retention oil burners is more
efficient. One result of increased efficiency, is lower
flue gas temperatures. As flue gases pass through the
coil, they cool and condense when they reach the dew
point (the temperature which air becomes saturated
and produces dew). The condensation mixes with the
sulfur in the flue gasses to create sulfuric acid. The
acid attacks the coil, wrap and connected plumbing
causing corrosion, deterioration and blockage of the air
passage ways. Eventually this blockage could prevent
the exhausting of flue gases.
Therefore, it is strongly recommended that the
coil and combustion box be examined on a regu-
larly scheduled maintenance program to prevent
and remove any build-up of soot from accumulating.

Combustion Air Supply Information

Adequate Combustion and
WARNING
Air Supply Ventilation
Required
Failure to provide adequate air supply could seri-
ously affect the burner performance and result in
damage to the equipment, asphyxiation, explosion
or fire hazards.
• The burner cannot properly burn fuel if it is not
supplied with a reliable combustion air source.
• Follow the guidelines from the manufacturer, for
locating the equipment in a well ventilated and ac-
cessible area, to allow for full combustion efficiency.
Equipment Located In Confined Spaces
All confined spaces should have two (2) permanent
openings; one near the top of the enclosure and one
near the bottom of the enclosure. Each opening must
have a free area of not less than one (1) square inch
per 1,000 BTU's per hour of the total input rating of all
equipment within the enclosure. The openings should
have free access to the building interior, which should
have adequate infiltration from the outside.
Exhaust Fans And Other Air-Using Devices
Air openings should be large enough to supply all air-
using devices, in addition to the minimum size required
for combustion air. If there is any possibility of the
equipment room developing a negative pressure you
must either pipe combustion air directly to the burner
or provide a sealed enclosure for the burner and supply
it with its own combustion air supply.
Section: Inspect/Prepare Installation Site
Minimum Chamber Dimensions
Verify that the equipment combustion chamber pro-
vides at least the minimum dimensions given in Table 2.
TABLE 2 - CHAMBER DIMENSIONS
Chamber Dimensions (inches)
Firing Rate (GPH) Round I.D.
0.75 - 1.25
1.25 - 1.75
1.75 - 2.00
2.00 - 2.25
2.25 - 2.75
2.75 - 3.0
3.0 - 4.0
4.0 - 5.0
KNA Burner Manual 9.801-300.0 rev. 8/13
Firing Length
12 12.0
13 12.0
14 14.0
15 15.0
16 18.0
20 20.0
22 22
25 25
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