GENERAL OPERATION and CONTROL
—
195,000 to 1,500,000 Btu/h HHV.
—
Combustion Air:
24 osig maximum air pressure (20 osig
maximum on -4-B, -5, and -6 burners)
—
Gas:
Natural gas
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Flame Supervision:
Flame rod or UV detectors can be used
but the performance varies depending on the number of fac-
tors.
With UV detectors the fl ame signal gets weaker as the length of
the tile increases, and as the excess air rate is increased. With
the long and extra long tiles the UV will not pick up a fl ame
signal reliable with as highof an excess air rate as teh short and
medium length tiles.
With a fl ame rod, the length of thetile dœ s not aff ect the fl ame
signal but a fl ame rod will not reliably sense high excess air
fl ames as well as a UV on a short or medium tile. With long and
extra long tiles, a fl ame rod will pick up fl ames over a wider
excess air range thana UV scanner.
TILE CHOICES
Tile shapes and material that suit your specifi c needs.
Materials
"A" Tile
— Alumina/Mullite tile for most applications
up to 2900°F.
"M"
Tile
— Durable cast metal alloy tile for general
applications up to 2000°F (sizes -2 through
-4-B only).
Exit Shapes
"R" Round
— for high penetration and maximum "drive".
"S"
Slotted
— for narrow lane fi ring and better temperature
uniformity (for "A"-alumina tile only).
Bulletin 4445/4445N
Page 8
ORDERING INFORMATION
4445N
-
-
Capacities
(scfh)
Air pipe size
16 osi air
-2
= 1-1/4"
1 950
-3
= 1-1/2"
3 250
-4-A
= 2"
5 700
-4-B
= 2"
6 900
-5
= 2-1/2"
9 260
-6
= 3"
15 000
Tile Material
A
= Alumina/Mullite
M
= Metal alloy cast 330 SST
(sizes -2 through -4-B only)
Tile Exit Shape
R
= Round, for high penetration
S
= Slotted, for high entrainment
(not available with metal alloy tile)
Tile Exit Size
H
= High Velocity Tile (standard)
Flame Supervision Requirement
R
= Flame Rod Supervision (fl ame rod included in
burner assembly)
U
= U.V. Supervision (Detector must be ordered sepa-
rately)
Burner Model
Insertion
Length
Depth
Range
S
= Short
9" to 12"
M
= Medium
12" to 20"
L
= Long
12" to 30"
E
= Extra-long
12" to 40"
X
= Special-Consult a North Americn Sales Representative
for Special Length Burner options.
Examples:
4445N-4-BASH-RL = -4-B Capacity 4445 Burner with an Alumina/Mulllite Slotted High Velocity Tile, with a Flame Rod and an Insertion Depth Range of 12" to 30".
4445N-2-MRH-UM = -2 Capacity 4445 Burner with a Metal Alloy Round High Velocity Tile, with "U" Flame Supervision Requirement and an Insertion Depth Range of
12" to 20".
4445N-5-ARH-RL = -5 Capacity 4445 Burner with an Alumina/Mullite Round High Velocity Tile, with a Flame Rod and an Insertion Depth Range of 12" to 30".
H
[Note: Standard slot orientation is horizontal, with the air connection at 6 oclock or 12 oclock. Contact product manager if vertical slot orientation is desired.]
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Ignition:
Direct spark (no pilot) w/6000 V (minimum)
transformers. A halfwave transformer will prevent UV
sensing of spark during trial for ignition.
—
Control:
Applicable with all control systems -- StepFire™, on-
ratio, and thermal turndown.
NOTE:
For best results, the limit-
ing orifi ce valve must be mounted as close as possible to the
gas connection.
—
Relight:
Tempest® burners require spark re-ignition since high
velocity burners will not relight off a hot tile or furnace.
Product Overview | 4445 & 4445N Tempest®
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