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READ AND REMOVE THIS PAGE BEFORE PLACING
THE SPECIFICATION SECTION IN THE CONTRACT

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DIVISION 15:  MECHANICAL

SECTION 15753 ‑ TUBE RADIANT HEATER

USE:	Furnishing and installing tube radiant heater systems.

NOTES TO SPECIFIER:

	A.	Options within paragraphs are identified by enclosure in brackets; blank spaces enclosed by brackets [_____] provide for information to be inserted, as appropriate, to individual projects.

	B.	TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES, the specifier must edit (delete, substitute or add to the text).  The remaining paragraphs must be renumbered.

	C.	DELETE FOR FINAL COPY: Notes to the Specifier, located between lines of asterisks; all [brackets], underlining, boldface, and italics, within the paragraphs; and this page.  (Open Reveal Codes [alt F3] to do this accurately.)

	D.	To Edit “(Footer B)”: (Corel 8).  ENTIRE FOOTER SHOULD BE BOLDED.  Click in the footer and delete the “Project Name (ftr B)” text and replace it with the Name of the Project (upper and lower case).  Replace date with current MM/YY (WITHOUT BRACKETS).

	E.	The Guide Specifications are intended to be continuously reviewed and revised.  User’s technical comments are appreciated.  Also, other related or similar specification that are written “from scratch” that could benefit others, or other questions can be sent to NSTC A/E Group, ST 110, or call (303) 987-6868.

DRAWING DATA  REQUIRED: 

REQUIRED SPEC MODIFICATIONS:

GENERAL NOTES

A.	Whenever entire articles, paragraphs or subparagraphs are not applicable, the articles, paragraphs or subparagraphs should be deleted; when necessary, reletter or renumber articles, paragraphs or subparagraphs.

B.	THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE SECTION.

TECHNICAL NOTES

A.	1.1A:  Select applicable words.

B.	1.1B:  Select or add applicable specification sections.  Do not list specification sections from Division 15.

C.	1.2:  Select or add applicable references.

D.	1.3A:  Select applicable equipment for either a natural draft or a mechanical draft system.

E.	1.3B:  Select applicable wording, depending on whether the system installation is to be designed by the Contractor or if the system installation has been designed by others.

F.	1.4B:  Insert number of copies of the manufacturer's descriptive data required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

G.	1.4C:  Insert number of copies of the manufacturer's installation instructions required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

H.	1.4D:  Insert number of copies of the manufacturer's operating and maintenance instructions required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

I.	1.4E:  If BLM is providing the heating system design, delete this paragraph.  If a Contractor is providing the heating system design, design calculations are required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to COR, 3 copies to Contractor, and 1 copy to project file.  Normally a registered professional engineer will be expected to stamp the calculations.

J.	1.4F:  Insert number of copies of shop drawings required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, and 3 copies to the Contractor, and 1 copy to the project file.

K.	1.5A:  If desired select a time for availability of parts and service.

L.	1.5B:  If possible, the selected contractor should be approved by the tube radiant heater manufacturer.

M.	2.1A:  Select equipment applicable to the system being specified.  Some systems require a blower in the Burner and Control Assembly while other systems do not.

N.	2.1B:  Select type of tubing required.

O.	2.1D:  Select either a natural draft system or a mechanical draft systems.

P.	2.1E:  Select the motor application and the specific motor characteristics required for the system.

Q.	2.1F:  Indicate the number of temperature zones required and indicate if blowers are required for the burners.

R.	2.1G:  Insert capacity required.

S.	2.1I:  Indicate the thermostat voltage.

T.	2.1J:  Select type of fuel.

U.	3.1B:  Indicate if clearances to combustibles are shown on the drawings.

V.	3.1D:  Indicate the clearance required between the end burners and building walls.

W.	4.1 and 4.2:  When a "lump sum" Contract is used, delete the title PART 4:  MEASUREMENT AND PAYMENT, and both articles from this section.  Measurement and payment will be addressed in Part 4 of Section 01010 -Summary of Work.

REVISIONS OF THIS SECTION:
CSI format, editorial changes: 12/01
Metric:  
Technical Update: 01/94

SECTION 15753

TUBE RADIANT HEATER SYSTEM

PART 1:  GENERAL

1.1  SUMMARY:

	A.	Section Includes:  [Furnishing] [and] [installing] a gas fired, [power] [vented] [non-vented] [low‑intensity] radiant tube type heating system complete with zone [control panels.] [thermostats].

1.2  REFERENCES:

	A.	American Gas Association:
	AGA Z83.6A-1984	Gas Fired Infrared Heaters

	B.	International Association of Plumbing and Mechanical Officials:
	UMC-88	Uniform Mechanical Code

	C.  National Fire Protection Association:
	NFPA 54‑88		National Fuel Gas Code
	NFPA 70‑90		National Electrical Code

1.3  SYSTEM DESCRIPTION:

	A.	General:  The system consists of burner and control assemblies, tubing, radiation reflectors, hangers, [draft hood, gas vent, vent cap,] [vacuum pumps,] prewired control panels, and thermostats.  The tubing provides an extended heat exchanger surface, and the aluminum reflectors reflect the radiant heat downward to the floor.  

	B.	Drawings:  [The drawings show the general layout of the radiant tube heating system.]  [The Contractor/installer shall be responsible for installation design requirements and drawings and installing the approved system according to the manufacturer's requirements, recommendations, and applicable codes.]

1.4  SUBMITTALS:

	A.  General:  Submittals shall be according to Section 01300 ‑ Submittals.

	B.	Manufacturer's Literature:  Submit [    ] copies of the manufacturer's descriptive data for the radiant tube heater system to be used on this project.

	C.	Installation Instructions:  Submit [    ] copies of the manufacturer's installation instructions for the radiant tube heater system to be used on this project.

	D.	Operating and Maintenance Instructions:  Submit [    ] copies of the manufacturer's operating and maintenance instructions for the radiant tube heater system to be used on this project.

	E.	[Design Computations:  Provide calculations for fuel line sizing, building total thermal heat losses, radiant pipe length selection, and system thermal output to the building interior.  Submit [____] copies of design calculations.  [Design shall be according to the requirements of this specification section.]  [Design computations shall be prepared by and bear the stamp of a [registered] [professional engineer] [licensed architect].]

	F.	Shop Drawings:  Submit [    ] copies of shop drawings for the radiant tube heater system to be used on this project.  Drawings shall be [same] [larger] scale as the full size Contract Drawings.  For the control system, submit both control system schematic drawings and control system wiring diagrams.

1.5  QUALITY ASSURANCE:

	A.	Manufacturer Qualifications:  A company regularly engaged in the manufacture of tube radiant heater systems, and who issue's a complete catalog of data on such products.  [The manufacturer shall have parts and service available to commence correction of the deficiency, within [72]  hours after verbal notification by the Contracting Officer, through factory representatives, franchised dealers, or factory certified maintenance service shops.

	B.	Contractor Qualifications:  A specialist with successful installation experience on projects with similar tube radiant heating systems [and] [approved by the tube radiant heater manufacturer.]

	C.	Installer Qualifications:  A technician with successful installation experience on projects with similar work.

PART 2:  PRODUCTS

2.1  EQUIPMENT:

	A.	Burner and Control Assembly:  [Blower,] Gas pressure regulator, air filter, gas safety shut‑off valve, spark igniter, burner [casting] and [steel] [cast iron] combustion chamber.  The burner assembly shall bear the seal of the American Gas Association.

	B.	Radiant Pipe:  [Four‑inch] diameter, [16‑gauge steel] [2 1/2‑inch Schedule 40 steel] pipe.

	C.	Reflectors:  Shall be aluminum, 8 ft long.

	D.	[Vacuum Pump][Natural Draft Vent]:  [Housing shall be heavy duty cast iron.  Impeller shall be cast aluminum alloy, dynamically balanced and mounted for direct drive on the motor shaft.]  [Draft hood, flue pipes, insulating thimble, vent cap.]

	E.	Blower/Vacuum Pump Motors:  Shall be [230] [115] volts, 60 hz, [3450] rpm, reversible rotation, with at least [1/2 hp], capacitor start, ball bearing and thermally protected.

	F.	System Control Panel Box:  Pre‑wired system control circuits shall be supplied in a panel box.  The panel box shall provide relays and terminals to accommodate [up to] [four] temperature zones with a thermostat and associated control circuits for the [vacuum pump] [blowers] and burners for each temperature zone.

	G.	Capacity:  The radiant tube heating system shall have a capacity [as determined by the system installation designer.] [of [                 ] Btuh output to the building interior.]

	H.	Combustion and Ventilation Air:  The provisions for combustion and ventilation air shall comply with the requirements, of the Uniform Mechanical Code.

	I.	Thermostats:  Shall be [24‑volt] thermostats located where shown on the drawings.

	J.	Fuel:  Equipment shall utilize [natural gas] [propane].

2.2  SOURCE QUALITY CONTROL:

	A.	Certification:  The heating system shall be certified by the American Gas Association.

PART 3:  EXECUTION

3.1  INSTALLATION:

	A.	General:  Install the heating system according to the Uniform Mechanical Code, the National Fuel Gas Code, the National Electrical Code, and the Manufacturers Installation Instructions.

	B.	Clearances:  Maintain the clearances specified on the drawings to heat-sensitive material, equipment, work stations, and maintain clearances to combustibles specified by the manufacturer [and] [shown on the drawings]. 

	C.	Suspension System:  Insure that suspension system is sufficiently flexible to accommodate thermal expansion which occurs when the system heats up.

	D.	End Burner:  Provide for minimum of [18‑inch] clearance between end burners and building walls.

	E.	Side Reflectors and Shields:  Install where shown on the drawings and where required to protect heat sensitive and combustible building materials or furnishings.

	F.	Servicing:  Provide access for servicing, preferably on both sides of burners.

	G.	Pitch:  Install radiant tubing and tailpipe tubing with a minimum downward slope toward the exhaust of 1/2‑inch in 20 ft for radiant tube lines and 1‑inch in 20 ft for manifold and tail piping and as required by the equipment manufacturer.  The system shall provide for the removal of condensation.

	H.	Gas Piping:  Connect gas connector from each burner to the gas piping as shown on the drawings.  The installation of the gas piping shall comply with the requirements of NFPA 54.

	I.	Burner Electric Cord:  Provide for plugging the burner electric cord into a receptacle adjacent to each burner.

3.2  DEMONSTRATION:

A.	Requirements:  Upon completion of installation and after circuitry has been energized, the Contractor shall demonstrate capability and compliance of system with requirements.  Malfunctioning units shall be corrected and retested by the Contractor to demonstrate compliance with the specifications.
3.3  TRAINING OF GOVERNMENT EMPLOYEES:

A.	Requirements:  See Section 01700 - Contract Closeout.

PART 4:  MEASUREMENT AND PAYMENT

4.1  METHOD OF MEASUREMENT:

	A.	Units:  The work described in this section will not be measured for payment.

4.2  BASIS OF PAYMENT:

	A.	Payment:  No direct payment for the work described under this section will be made.  The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION

TUBE RADIANT HEATER SYSTEM
12/01
Project Name (ftr B)