3
Figure 2–Specifications
Input:
1,000,000 Btu/hr. per lineal foot (962 kW/m).
Fuels:
Natural gas or 100% propane vapor. Call Eclipse for information on using other fuels.
Gas Turndown:
40:1
Pilot Input:
Approximately 25,000 Btu/hr. (7.3 kW)
Gas Inlet Pressure:
800,000 Btu/hr/ft. (769 kW/m):
Nat. Gas:
2.2" w.c.
5.5 mbar
Propane:
0.9" w.c.
2.2 mbar
1,000,000 Btu/hr/ft. (962 kW/m):
Nat. Gas:
3.5" w.c.
8.7 mbar
Propane:
1.3" w.c.
3.2 mbar
Gas pressure shown is a differential measured between the gas inlet and a tap on the
duct wall 10" to 20" (254 to 508 mm) downstream of the burner.
Flame Length*:
800,000 Btu/hr. (769 kW/m):
28"
0.71 m
1,000,000 Btu/hr. (962 kW/m):
46"
1.17 m
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 oppo-
site 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. RAH 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
RAH
Line-shape
Data 142-1
TAH-R
“
I
”-shape
Data 142-2
* Based on parallel air flow. If mounted in a cross flow, then flame will be shorter.
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.
6
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 blower damper until the air pres-
sure drop is 0.5" w.c. for burners on the
pressure
side of the circulating fan, or 1.0"
w.c. for burners on the
suction
side of the
circulating fan.
Large Burners Only:
Some models, such
as the 640, 680, and 720 TAH-R burners, contain a butterfly valve in the check valve
line as shown in Figure 8. On these models, after setting the air flow as described in
the previous paragraph, measure the air pressure drop between the gas pressure tap
and duct as shown in Figure 7. Gas flow must be off. Adjust the butterfly valve to pro-
duce an air pressure drop of 0.2" w.c.
Figure 6—Pilot Cock
Figure 7—Pressure Measurement
Gas
Pressure
Tap
Duct Tap
10" to 20"
Downstream of Burner
Air Pressure
Taps (2)
Top Screw
Handle
(Shown in
Open Position)
Adjusting Screw
(Clockwise for less pilot gas,
Counterclockwise for more pilot gas)
