It is the intent of this specification to identify design requirements and minimum standards for the quality,
construction, delivery, installation, and operation of the low intensity, vacuum vented, gas fired infrared heating
equipment. Minor variations, in accordance with standard practice, shall be indicated on the shop drawings and
submitted for approval.
1.1 - CODES AND STANDARDS
1.1.1 The entire heating system shall be designed certified to:
a) American Gas Association "Gas-Fired Low-Intensity Infrared Heaters" conforming to the ANSI
Z83.20- (Current Standard).
b) Canadian Gas Association Certified "Gas-Fired Low-Intensity Infrared Heaters" conforming to
1.1.2 Installation shall conform to local codes and local gas authorities including the National Electrical
1.2 - QUALITY ASSURANCE
CSA 2.34 – (Current Standard).
Code, National Fuel Gas Code, and applicable ANSI, NFPA & CAN/CGA & CSA codes.
1.2.1 The material construction and operation of the infrared heating equipment shall conform to the
performance specifications contained herein. Approved manufacturer is: Combustion Research
Corporation, 2516 Leach Rd., Rochester Hills, MI, 48309; Tel. No. 248.852.3611, Fax. No.
248.852.9165.
1.2.2 Manufacturer shall warrant mechanical and electrical components for a period of one year from
original invoice date.
1.2.3 Manufacturer shall warrant radiant tube for a period of ten (10) years (against internally created
corrosion) from the original invoice date provided system is installed and maintained in accordance
with the owner's manual - see warranty statement for details.
1.2.4 System shall be furnished complete with Burner(s), Tubular infrared emitters, Fittings, Reflector
Shields, Hangers, and System Controls.
1.3 - MANUFACTURER AND INSTALLER QUALIFICATIONS
1.3.1 The low intensity, gas fired infrared heating system shall be a product of a manufacturer who has
had at least ten years experience in design and fabrication and who is regularly engaged in the
manufacture of the type of gas fired low intensity infrared heating equipment specified herein. Only
manufactures who can submit evidence of actual installations of comparable designed construction,
and that the products have proven practical, durable, and require a minimum of maintenance, will be
qualified under this specification.
1.3.2 Installation of the gas fired low intensity infrared heating equipment shall be by supervised by an
authorized representative of the heater manufacturer and shall be in accordance with approved
installation drawings. Mechanics shall be skilled and experienced in the erection of the low intensity
infrared heating equipment of the type specified herein.
1.4 - DELIVERY AND STORAGE
1.4.1 Materials shall be shipped in the manufacturers standard protective packaging to the designated
site.
1.4.2 The installing contractor is responsible for receiving, unloading and storage of materials. Storage
shall be in dry locations free from dust and water and available for inspection and handling. Handle
equipment carefully to prevent damage. Remove damaged items that cannot be restored to like new
condition and replace with new items.
REVISED – March 25, 2006submitom.doc (9/23/03)
PART 2 - PRODUCT
2.1 - BURNER
2.1.1 Burner shall be capable of firing at 40,000 BTU/hr (11.72 kW/hr) up to and including 100,000 BTU/hr
(29.3 kW/hr) at 5,000 BTU/hr (1.46 kW/hr) increments with natural gas or LP gas.
2.1.2 Burner power requirements 115 Volt, 60 Hz AC, 1.8 A.
2.1.3 Burner shall include the following features:
a) Fitted with a 4" (102 mm) diameter combustion air inlet with a fixed combustion air-metering
orifice.
b) Burner shall be fitted a differential air pressure switch so as to prove adequate combustion air is
present before burner fires.
a) Burner shall be fitted with solid state electronic controls with spark ignition & 100% lockout in
event of flame failure.
b) Regulator to be factory set at 3.5" W.C. (6.54 mm/Hg) for natural gas and 10.0" W.C. (18.68
mm/Hg) for propane gas.
c) Gas valve, ignition controls, and differential pressure switch shall be enclosed within the burner
compartment and SEGREGATED from the combustion air supply.
d) Heavy-duty nozzle pre-mix combustion system - minimum 0.125" (3.17 mm) metal thickness.
e) Electrode and flame rod to be made of NiChrome.
f) Burner shall have a minimum 15-second pre-purge before ignition.
g) Burner shall casing to be constructed of 16 Ga. (1.587mm) aluminized steel, powder coated.
h) Burner shall be fitted with inspection window for visual inspection of spark and flame.
i) ½" NPT gas inlet on the back, side, bottom or top of burner assembly - GAS INLET IS NOT TO
2.1.4 Burners venting into common stack shall be operated with one thermostat.
2.2 - SYSTEM CONTROLS
BE ON THE COMBUSTION TUBE SIDE OF BURNER.
2.2.1 Shall be supplied with:
a) Supplied with pre-wired controls. 115V, 16 amp, 60 Hz.
b) Solid state spark ignition and flame rectification (separate probe) with 100% flame lockout and
30 second pre-purge (24 VAC, 22 VA).
c) Thermostat provided by equipment manufacturer, 115V, 8 amp minimum rating.
2.3 - RADIANT TUBE HEAT EXCHANGING NETWORK
2.3.1 All radiant tubing (including combustion tube) shall be stainless steel construction.
2.3.2 Combustion tube shall be 10' (3048mm) long 16 gauge stainless steel 3.5" (89 mm) OD swa ged
one end.
2.3.3 Balance of radiant tubing shall be heat-treated, spiral wound 22 gauge aluminized 409 stainless steel, 3.5" (89 mm) OD.
2.3.4 Assembly: Assemble and install the heating system in accordance with the installation manual and
shop drawings.
a) Combustion tube to be supported with tube and reflector hangers on maximum centers of:
- Straight tube systems - 54" (1372 mm)
- "U" tube systems - 66" (1376 mm)
b) Remainder of radiant tube to be supported with tube and reflector hangers on maximum centers
of:
- Straight tube systems - 118" (2,997 mm) with intermediate reflector supports between each
118" (2,997 mm) distance.
- "U" tube systems - 66" (1676 mm).
c) Burner head is to be supported by approved hanging method and not allowed to "free hang" off of
the combustion tube.
REVISED – March 25, 2006submitom.doc (9/23/03)
2.3.5 Elbows and tube coupler to be made of min. 18 gauge (1.32 mm) aluminized steel, swaged at both
ends so as to fit into 3.5" (89 mm) spiral tube.
2.3.6 Reflectors to be made of minimum 0.025" (0.635 mm) bright stainless steel.
2.3.7 Tubing and reflector hangers to be made of 0.25" (6.35 mm) Dia. Zinc plated CRS.
2.3.8 All joints to be sealed and mechanically fastened with self drilling and tapping screws.
2.3.9 All radiant tubing to be continuously covered by the reflector, i.e. radiant tube elbows, "U' bends and
fittings to be covered by reflectors -- NO GAPS BETWEEN REFLECTORS. Reflectors are to be
overlapped a minimum of one-inch (25.4 mm) and secured together with sheet metal screws
allowing for one unsecured overlap joint for expansion on each straight run exceeding ten feet
(3,048 mm).
2.4 - COMBUSTION AIR
2.4.1 Outside combustion air (if used) is to be provided without the use of supplementary supply blowers
or fans.
2.4.2 Outside combustion air ducting to be minimum of 4" (102 mm) OD (S&D PVC or galvanized
stovepipe).
2.5 - SYSTEM PERFORMANCE
2.5.1 System shall attain a net exhaust temperature of not less than 200° F (92.5° C) in a 15 min. run
cycle and shall not exceed a maximum net temperature of 400° F (204.2° C).
2.5.2 System STEADY STATE EFFICIENCY shall be a minimum of 77%, maximum 87%.
2.5.3 System shall be a non-condensing dry tube system i.e. - After a minimum run time of 8 minutes all
condensation will cease and moisture will exit the system in a vapor state.
PART 3 - EXECUTION
3.1 - INSTALLATION
3.1.1 Power Requirements: It is the installers' responsibility to verify the correct power requirements for
the project.
3.1.2 Fuel Supply and Distribution:
a) A suitably designed gas distribution system shall be installed per shop drawings .
b) Each burner assembly shall be furnished with a stainless steel gas connector with manual shu t
off valve.
3.1.3 Assembly: Assemble and install the heating system in accordance with the installation manual and
shop drawings.
3.1.4 Cleaning: Clean reflectors as may be required and touch up painted surfaces as may be needed.
3.1.5 Testing: Upon completion of installation, including work by other trades, adjust and test the heating
system in accordance to the manufacturer's owners manual. Adjust and re-test heating system until
entire installation is fully operable and acceptable.
3. When exhausting more than one OMEGA II heater
into a common stack the same thermostat should
COMMON VENTING
1. The total stack length from the OMEGA II exhaust
to the point where it terminates should be a
control both heaters.
4. Connections to a common stack must be
staggered so as to avoid direct opposition between
streams of combustion gasses.
minimum of three feet (3') and a maximum of
twenty feet (20'). It is recommended that any
portion of flue pipe that passes through the roof or
wall be a double wall vent, 'B' vent is
recommended (check local codes) .
2. Horizontal runs to vertical vent should never
exceed 75% of the vertical height of the vent stack.
Refer to ANSI Z223.1 (current standard) (same as
bulletin NFPA-54) for proper vent sizes and
installation. When exhausting more than one
OMEGA II heater into a common stack the open
area of vent must equal or exceed the sum of the
open area of each flue vent connected to it.
5. A 1" minimum clearance must be maintained
around vent when passing through the roof.
6. An approved Vent Cap should be used on all
through the roof applications. The National Fire
Protection Standards, NFPA Numbers 54 and 211,
require that unless an approved Vent Cap is used
the vent must extend at least two feet above the
highest portion of a building within ten feet.
7. All Joints in the flue should be sealed. Use General
Electric RTV 106 Red, high temperature adhesive
sealant or equivalent should be sealed. Use
General Electric RTV 106 Red, high temperature
adhesive.
REVISED – March 25, 2006submitom.doc (9/23/03)
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