Forney Horn User Manual
Horn Igniters
A UTC Fire & Security Company
Forney’s horn igniter offers reliable single
or dual fuel ignition and warm-up for
tangentially fired burners and is designed
for maximum flame stability and
detection.
Features & Benefits
Ign Iter Ca paCIt y
•
Up to 4 MBtu/hr for ignition and/or support
of main gas, oil or coal burners and up to
15 MBtu/hr with an auxiliary gun.
Depending on burner capacity, the horn
igniter is capable of supporting Class 1 or
2 operations.
Dua l Fuel Capab IlIty
•
The single fuel horn igniter fires either oil or
gas; the dual fuel horn igniter fires either oil
or gas without any change of equipment.
Sta ble Fla me
•
Combustion air is evenly distributed
throughout the horn for reliable operation;
Forney’s design does not include an eddy
plate, thus reducing coke buildup and
overheating.
Opt IOnal Flame DeteC tIOn
•
The flame detector senses flame inside the
horn and discriminates from flames outside
the horn.
Product Overview
e Forney horn igniter is used on tangentially fired boilers for burner
ignition and warm up, typically as a Class 2 igniter. Depending on customer
needs, Forney offers either a single or dual fuel horn igniter. e single fuel
horn igniter fires either oil or gas. e dual fuel horn igniter fires either oil or
gas without a change of equipment, allowing for a quick and effortless change
over of fuel.
Both horn igniter assemblies consist of a mounting plate, an oil or gas gun
for the single fuel horn igniter or a combination oil and gas gun for the dual
fuel horn igniter, a High Energy Spark Igniter (HESI), a combustion air tube,
an optional flame detector, and a horn. e major components are fastened
to the igniter front plate with easily removable connections to simplify main-
tenance. e oil and gas connections utilize stainless steel braided hoses and
optional quick disconnect couplings.
e optional flame detector is mounted on a 1” NPT sight tube, which
provides an unobstructed view of the flame inside the horn. Since the detector
is mounted to the igniter windbox, it does not require cooling air.
rel Iable IgnItI On
•
The High Energy Spark Igniter (HESI) is
fixed at 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
On retrofit applications, the existing horn (diffuser) may be reused, if it is
not damaged or deteriorated. As a result, the installation requires only replac-
ing the front plate and internal hardware, minimizing costs.
PACHE / FORNEY 1 / TECH BULLETINS WORKING / SCANS / HORN IGNITER
LINE ITEM #11 on Requsition # 42871
This is one of the original POSTSCRIPT les submitted by Larry Cawood back in May. Not a part of what Picas & Points received
7/27/95. If there is now a duplicate, please specify which to use by indicating USE THIS ONE or DESTROY THIS ONE.
USE THIS ONE per MERRILL 8/4/95.....
REVISED 9/12/95 PER MERRILL JONES
HESI
IGNITER
FRONTPLATE
OIL INLET
ATOMIZING AIR INLET
IGNITER HORN
(DIFFUSER)
FLAME
DETECTOR
OBSERVATION
PORT
OIL NOZZLE
IGNITER
WINDBOX
Horn Igniters
Pub # 404006-07
Specications
Fuel: No. 2 Oil, Propane or Natural Gas
Oil
Capacity Rating: 2 – 4 MBtu (consult factory for higher output, available up to 15 MBtu)
Fuel Pressure: 60 – 125 psig
Atomizing Media Pressure: 25 psig differential over oil pressure
Gas
Capacity Rating: 2 – 4 MBtu (consult factory for higher output, available up to 15 MBtu)
Fuel Pressure: 12 – 25 psig
Cooling/Combustion Air
Flow: 120 SCFM
Pressure: 4 – 6 inches w.c. above furnace pressure
HESI Specications:
Input Voltage: 120 to 240 VAC, 50/60 Hz
Rev 01/2011
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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