3
Figure 2–Specifications
Inputs & Pressures:
See table below.
Fuels:
Natural gas or 100% propane vapor. Call Eclipse for information on using other fuels.
Airstream Temperatures:
Upstream of Burner:
450
°
F
250
°
C
Downstream of Burner:
1000
°
F
540
°
C
Oxygen Level:
18% oxygen required in the process airstream.
Net Free Area:
10 sq. in. per lineal foot
212 sq. cm per lineal meter
Pilot Input:
Approximately 25,000 Btu/hr. (7.3 kW)
Piloting:
Integral spark-ignited pilot; ignition plug included.
Flame Monitoring:
Flame rod supplied. UV scanner adaptors are available. For UV scanners, Eclipse
recommends a flame monitoring system that terminates the ignition spark and
proves the pilot flame without spark prior to opening the main gas valves.
CGA requires two flame rods on burners over 36" long (914 mm). Use a flame moni-
toring endplate (see Data 140-6) to mount a second flame rod on the end opposite
the gas inlet.
Materials:
All portions of the burner exposed to flame are cast iron or #321 stainless steel.
Emissions:
Capable of operating at less than 35 ppm NO
x
or less than 100 ppm CO, depending
upon operating conditions. Emissions performance depends not only on the burner,
but also other factors such as chamber temperature, chamber design, and heat load-
ing. For estimates of emissions performance in your application, call Eclipse.
Packaging Options:
Available with complete valve trains and control systems. AH-O burners and systems
can be supplied mounted on duct sections as specified by the customer. Call Eclipse
for information on custom packaged systems.
Models:
Model
Description
Data Sheet
AH-O
Line-shape
Data 144-1
TAH-O
“I”
-shape
Data 144-2
Inputs, Pressures, & Flame Lengths
CAUTION: It is dangerous to use any fuel burning equipment unless it is equipped with suitable flame sensing devices
and automatic fuel shut-off valves. Eclipse can supply such equipment or information on alternate sources.
Gas Pressure*
Air
∆
P
Air Flow
Flame
Across
Per Area
Rated Input
Nat. Gas Propane
Length**
Burner
†
of Opening
††
550,000 Btu/hr/ft
1.2" w.c.
0.5" w.c.
18-24"
0.4" w.c.
13.6 scfm/in.
2
800,000 Btu/hr/ft
2.2" w.c.
0.9" w.c.
24-30"
0.7" w.c.
17.6 scfm/in.
2
1,000,000 Btu/hr/ft
3.5" w.c.
1.3" w.c.
40-46"
1.0" w.c.
21.5 scfm/in.
2
530 kw/m
3.0 mbar
1.2 mbar
46-61 cm 1.0 mbar
3.39 Nm
3
/hr/cm
2
762 kw/m
5.5 mbar
2.2 mbar
61-76 cm 1.7 mbar
3.39 Nm
3
/hr/cm
2
962 kw/m
6.2 mbar
3.2 mbar 102-117 cm 2.5 mbar
5.36 Nm
3
/hr/cm
2
*
Measured between the gas inlet and a tap on the duct wall 10" to 20" (25 to 50 cm) downstream of
the burner.
**
Flame length is a function of burner input, air
∆
P and air flow across burner face. If flame length is not
critical, then these figures may vary.
†
Air at 70
°
F and sea level.
††
Required flow per unit area of combined profile opening and burner net free area to produce the cor-
responding air
∆
P.
6
3.0 Duct Design and Burner Mounting
Profile Plate & Duct Design
See Figure 5 for typical profile plate and duct designs.
Valve Train Support
Support valve trains independently of the burner.
Gas Piping
Use flexible nipples to allow for thermal expansion of the burner.
Check Valve Piping
Gas flow through the check valve must be horizontal. See Figure 3.
Gas Piping Standards
Gas piping must comply with American National Standard entitled "National Fuel Gas
Code"* (NFPA No. 54 or ANSI Z223.1), or must be acceptable to the authority having
jurisdiction.
Wiring Standards
Electrical wiring must comply with the National Electric Code*, (NFPA Std. 70 or ANSI-
CI 1981), or must be acceptable to the authority having jurisdiction.
*Available from:
National Fire Protection Association
American National Standard Institute
Batterymarch Park
1430 Broadway
Quincy, MA 02269
New York, New York 10018
4.0 Start-Up And Adjustment
Initial Settings
Adjust the linkage of the gas control valve so that when heat is called for, the valve is
10
°
from fully open, and when cooling is required, the valve is approximately 5
°
from
fully closed.
Close all manual gas cocks.
With the pilot cock handle in the closed position, remove the top screw and turn the
adjusting screw five turns out from fully closed. See Figure 6.
Start Blower
Start the combustion air blower. Check the rotation to make sure it is correct. If not,
have a qualified electrician rewire the blower for proper rotation.
Start Circulating Fan
Start the duct circulating fan.
Set Air Pressure Drop
Measure the air pressure drop across the
burner as shown in Figure 7.
Adjust the damper on the circulating fan until
the air pressure drop is between 0.4" w.c.
minimum and 1.0" w.c. maximum. See the
table in Figure 1 for maximum and minimum
inputs permitted for various air pressure
drops. For a given input, lower air pressure
drops will produce a longer flame, and
higher drops will produce a shorter flame.
Start Spark
Energize the ignition spark.
Do not touch
the ignition rod, ignition wire, or trans-
former while the spark is energized, or
you will get a shock.
Set Pilot Flow
Open all pilot gas valves, including the handle of the pilot cock, Figure 6. The pilot
should light.
Turn the pilot adjusting screw to produce a bushy blue flame that provides a flame
monitoring signal strong enough to reliably open the gas shut-off valves.
Figure 6–Pilot Cock
Top Screw
Handle
(Shown in
Open Position)
Adjusting Screw
(Clockwise for less pilot gas,
Counterclockwise for more pilot gas)
