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.
Combustion air is supplied to “RAH” and “TAH-R” models by a blower located out-
side the duct. This allows the burners to operate in recirculating airstreams with air
temperatures upstream of the burner as high as 750
°
F (400
°
C).
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)
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.
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 Fig. 1.
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.
5.0 Routine Maintenance
Motor Lubrication
Oil the blower motor according to the manufacturer’s instructions as printed on the
motor label.
Ignition 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.
Butterfly Valve On
640, 680 & 720
TAH-R Burners
Check
Valve
Figure 8–Butterfly in
Check Valve Line
