Forney Q87 User Manual
A UTC Fire & Security Company
Flexible Single Tube (FST) Igniter
Forney’s Flexible Single Tube (FST)
Igniter provides multi-fuel, stable and
reliable ignition for tangential burners
utilizing a flexible design for optimal
ignition with tilting nozzles.
Features & Benefits
Cla ss 1 Ig nIter
•
Capacities up to 37 MBTU/hr which will
support ignition under all credible burner
light-off or operating conditions.
One Fst Ig nIte r su ppOr ts twO Fue l
•
nOz zles
This arrangement results in half the
number of igniters normally required.
Flame st abIlIty
•
The stainless steel 7 1/2” air swirler creates
a low pressure zone at the tip for stable
flame operation.
lO w Opa CIty
•
The turbulent mixing of the fuel and
combustion air caused by the swirler
ensures low opacity during cold light-off.
eas y retrO FIt
•
Can be installed between most fuel
elevations with minimal or no burner
modification.
Product Overview
e Flexible Single Tube (FST) Igniter is a reliable source of ignition
energy for use in a tilting tangential type boiler. It is a Class 1, continuous duty,
igniter capable of burner ignition and low load support. It is easily installed in
the auxiliary air nozzles between the main fuel elevations and is designed with
flexible components to accommodate the tilting of the fuel nozzles. e FST
Igniter is capable of burning liquid or gaseous fuels. With capacities up to 10%
of boiler heat input, the FST improves boiler / turbine startup flexibility.
Each FST Igniter includes a flexible fuel gun, a flexible retractable High
Energy Spark Igniter (HESI) and a flame detector with a flexible fiber optic
assembly. e fuel gun has an air swirler at the furnace end which mixes the
windbox air and fuel at the tip to create a stable flame. All major components
are fixed to a burner front plate that is designed to match the existing bolt
pattern at the burner front. All components are designed to freely tilt with the
fuel nozzle through a ±30° angle. Flame detection is accomplished by the use of
either an ultraviolet or infrared detector, depending on the fuel fired.
Optional equipment includes gun retraction, quick disconnect fuel and
atomizing air couplings, as well as an electrical junction box.
rel Iable IgnItI On
•
The High Energy Spark Igniter (HESI)
automatically inserts to the most efficient
light-off position for repeatable ignition.
Forney Corporation • 3405 Wiley Post Road • Carrollton, TX 75006 • 800-356-7740 • Fax 972-458-6650 • www.forneycorp.com
Flexible Single Tube Igniter (FST)
PACHE / FORNEY 1 / TECH BULLETINS WORKING / SCANS / Flexible Single Tube Igniter (37686501)
LINE ITEM #9 on Requsition # 42871
Received and converted engineering drawing 8/9/95 from Merrill (Larry Cawood).
Merrill: Labeling, Arrows, etc. are necessary on this drawing, please do so and submit on next edit. Thanks.
REVISED per Merrill 9/12/95....
FLEXIBLE
SECTION
OIL
GUN
FIBER
OPTICS
HESI SWIRLER
Specications
Fuel: No. 2 Oil or Natural Gas
BTU Rating Oil: 10 – 37 MBTU/hr
Gas: 10 – 20 MBTU/hr
Fuel Pressure Oil: 60 – 125 psig
Gas: 12 – 25 psig
Cooling/Combustion Air Flow: 40 SCFM
Pressure: 6 WC
Guide Tube OD: 2.38”
Mount Tube OD: 2.88”
Length: As Required, up to 8.5’
Atomizing Pressure: 20 psig (Differential over oil pressure)
Material of Construction: Guide Tube and Mount Tube, Carbon Steel;
Guide Tube Tip and Pilot Area, 304 SST
Retract Cylinder Air Pressure:
(HESI/oil gun)
60 to 100 psig
Pub # #404006-05
Rev 04/2002
HESI Specications
Input Voltage: 120 to 240 VAC, 50/60 Hz
Input Power: 120 VAC @ 1.5 A (2-A fuse); 240 VAC @ 0.75A (1-A fuse)
Output Voltage: 2000 VDC
Output Energy: 12 joules per spark
Spark Rate: 3 per second (approximately)
Duty Cycle: 50% at temp 0°F to 135°F (-18°C to 57°C) Ambient
Forney Corporation • 3405 Wiley Post Road • Carrollton, TX 75006 • 800-356-7740 • Fax 972-458-6650 • www.forneycorp.com
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