Sheet 4343-3 Page 3
Cooling Air Flow and Pressure Drop Across Fuel Tube Adjustments should be made in stop cycle mode so that backpressure is constant. Adjust #6 cooling air butterfly valve.
TB-II Size
-7A thru -8B -9 thru -12-B
Regulator size
7349A-3-A
7349A-4-A
Reg. Capacity Drop TB-II Backpressure
5" 11"
2.6"
TB-II Size
-7A thru -8B -9 thru -14
11"
Pilot Pressure
4.3" 2.7"
4.3" 2.7"
Flow (scfh)
700
1000
Control Valve Press. Drop Total Air Pressure Req'd.
Pressure (P) "wc Measure P at item
1"
1"
23"w.c.
20.6"w.c.
#7
#7
Air Supply to Pilot/Cooling Air Regulator
The 7349A-3-A regulator requires 20.5"w.c. inlet pressure and the 7349A-4-A regulator requires 18.0"w.c. inlet pressure. The maximum pressure drops that make up total air required are listed in the table.
TYPICAL UV SCANNER ASSEMBLIES FOR MAIN FLAME
End User Location
UV
UV Scanner Part Number R130-UV7A4 R130-UV1AL-6
Main Flame
Pilot
Scanner Adapter 8836-R 8836-R
Scanner
Sensor Module EMX-MBPF100S
Flame
United States
Fireye UV7A4 Fireye UV1AL
EMX-MBPF100S
Europe
R130-MBCE-110/230UV
R130-MBCE-100/230FR
See the 8832 Bulletin for 8836-R details
COMPONENTS REQUIRED FOR MAIN FLAME SELF-CHECKING UV SCANNER
Assembly Number
UV
UV Scanner Part Number
Scanner Adapter 8835-R
1 NPT x ¾ NPT
Scanner
Adapter
4-47709-1 Honeywell C7061 R-130-5251
4-8035-3
PILOT ASSEMBLY / FLAME ROD ASSEMBLY
4020-3A-CB pilot for burner sizes -7A thru -8B 4020-3-CB pilot for burner sizes -9 thru -12B 4020-4-CB pilot for burner size -14
Add anti-seize and lubrication compound to threads on pilot at installation (such as "Never-Seez" P.N. R790-1007)
Flame rod assembly 4-25432-1
Pilot adapter 4-42625-1 for burner sizes -7A thru -12B Pilot adapter 4-49059-1 for burner size -14 (included with TwinBed II burner head
Gasket 4-17477-3
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