2
Important Notices About Safe Burner Operation
Storage
Store the burner inside. Exposure to the elements can damage the burner.
Qualifications
Adjustment, maintenance, and troubleshooting of the mechanical parts of this unit
should be done by people with good mechanical aptitude and experience with com-
bustion equipment.
Replacement Parts
Order replacement parts from Eclipse only. Any customer-supplied valves or switches
should carry UL, FM, CSA, and/or CGA approval where applicable.
Operator Training
The best safety precaution is an alert and competent operator. Thoroughly instruct
new operators so they demonstrate an adequate understanding of the equipment and
its operation. Regular retraining must be scheduled to maintain a high degree of profi-
ciency. The operator must have easy access to this Information Guide at all times.
1.0 Burner Operating Parameters & Requirements
Applications
Eclipse Air Heat Burners are line type burners ideal for generating large volumes of
clean, hot air. Applications include ovens, dryers, fume incinerators, and similar indus-
trial equipment.
“AH-O” and “TAH-O” models are designed for mounting in ducts where all of the air
required for combustion is available form the process airstream. Because these burn-
ers depend on the airstream for combustion air, a profile plate must be used to estab-
lish proper air flow past the burner.
Capacities & Supply Pressures
See Figure 2.
Burner Environment
Weather Protection:
Protect burners from the weather.
Combustion Air:
Must be free of contaminants. Eclipse strongly recommends use of
a combustion air filter to remove airborne particles. If corrosive fumes or materials are
present in the air, supply the blower with fresh, clean air from an uncontaminated area
of the plant.
Room Openings:
If the burner is mounted on the side of the duct, provide at least one
square inch of opening to the outdoors for every 4000 Btu/hr (1.2 kW) of burner firing
rate. This will admit fresh combustion air.
Access:
Provide access to the burner for inspection and maintenance.
Figure 1–Ignition, Flame Monitoring, and Pilot Components
Scanner
Connection
1/2" N.P.T.
Mount In Place
of Peepsight
3/4"N.P.T.
Scanner Adaptor 109559
For Sizes 440 through 800 AH
Scanner Adaptor 109000
For Sizes through 400 AH
Peepsight
#10509
3/4" N.P.T.
Flame Rod
#13093-3
Spark
Plug
#13047
Main Gas Inlet
2" N.P.T.
Pilot Cock
#12659
Pilot
Regulator
#15027
Mounting
Bracket
Pilot Gas Inlet
1/4" N.P.T.
Scanner
Connection
1/2" N.P.T.
Mount In Place
of Peepsight
1/4"N.P.T.
7
4.0 Start-Up And Adjustment
(continued)
Set Gas Flow
Measure the gas differential pressure as shown in Figure 7.
With the gas control valve at low fire, open all main gas valves. The burner should light
with a stable, blue low fire flame that extends evenly down the burner length.
Drive the control valve to high fire and adjust the gas adjusting valve to produce a
pressure drop that corresponds to the desired high fire rate, as shown in Figure 7.
When setting high fire, be sure the flame does not impinge on anything downstream of
the burner. To shorten the flame length for a given gas input, increase the air pressure
drop as described above.
Check All Settings
Return the burner to low fire and check to be sure that the burner remains lit with a
stable flame that extends down the burner length. Cycle the burner between low and
high fire several times, checking pressure drops and flame lengths.
Figure 7–Pressure Measurement
Gas Differential Pressures for Various Inputs
Btu/hr. per Foot of Burner, in 1000’s
Fuel
550
600
650
700
750
800 1000
Natural Gas
1.20 1.40 1.65 1.90 2.10 2.20 3.50
Propane
0.50 0.60 0.70 0.80 0.85 0.90 1.30
kW per Meters of Burner
Fuel
529
577
625
673
721
769
962
Natural Gas
3.0
3.5
4.0
4.8
5.2
5.5
8.7
Propane
1.2
1.5
1.8
2.0
2.1
2.2
3.3
mbar
"w.c.
Gas
Pressure
Tap
Duct Tap 10" to 20"
Downstream of Burner
Air Pressure
Taps (2)
5.0 Routine Maintenance
I
gnition Plug/Flame Rod
Ignition plugs and flame rods wear out over long periods of normal burner operation.
Eclipse recommends that the user keep at least one of each in stock at all times to
prevent nuisance shutdowns.
