WW-F-2743A
c. Type I group 2, group 3 and type II, group 3, oil-fired units shall meet the requirements of UL 731. The oil burners shall conform to UL 296, and be of the mechanical atomizing type with direct spark or interrupted ignition.
d. Type I, group 3 and type II, group 3 gas-fired units shall meet the requirements of UL 795 or ANSI Z21.47. Heaters with atmospheric burners shall meet ANSI Z83.8 and power burners shall meet UL 296. Continuous pilots shall not be permitted.
e. Combination oil- and gas-fired units shall comply with the applicable provisions of
3.7c and 3.7d.
3.7.1 Compliance. Prior to approval of the first shipment, the contractor shall submit for the approval of the contracting officer, or his authorized representative, satisfactory evidence that the furnaces and heaters he proposes to furnish under this specification meets the requirements of
UL 727, UL 731, UL 795, ANSI Z21.47 and ANSI Z83.8 as applicable.
3.7.1.1 Type I and type II oil-fired units. Acceptable evidence of meeting the requirements of UL 727 for type I and UL 731 for type II units will be the UL listing mark plus a listing in the current UL Gas and Oil Equipment Directory indicating that the unit has been approved for the specified installation clearances (see 3.9). Also acceptable is a certificate of compliance as part of the first article from a recognized independent testing laboratory acceptable to the Government, indicating the equipment has been tested and conforms to UL 727 or UL 731 and the specified installation clearances (see 3.9).
3.7.1.2 Type I and type II, group 1 and group 2 gas-fired units. Acceptable evidence of meeting the requirements of ANSI Z21.47 will be the A.G.A. Laboratories certification symbol and a listing in the A.G.A. Laboratories Directory of Certified Gas Appliances. Also acceptable is a certificate of compliance as part of the first article tests from a recognized independent testing laboratory acceptable to the Government, indicating the furnace design conforms to
ANSI Z21.47. The listing or certificate shall indicate that the unit has been approved for the specified input capacity (see 3.8.1), installation clearances (see 3.9), and type of gas (see 1.2.3).
3.7.1.3 Type I, group 3 and type II, group 3 gas-fired units. Acceptable evidence to meeting the requirements of UL 795 will be the UL listing mark or ANSI Z21.47 will be the A.G.A. Laboratories certification symbol and a listing in the A.G.A. Laboratories Directory of Certified Gas Appliances. Also acceptable is a certificate of compliance as part of the first article test from a recognized independent testing laboratory acceptable to the Government that the heater has been tested or designed and conforms to UL 795 or ANSI Z21.47, as applicable. The listing or certificate shall indicate that the unit has been approved for the specified input capacity
(see 3.8.1), installation clearances (see 3.9), and type of gas (see 1.2.3).
3.8 Performance.
3.8.1 Thermal input. The contractor's rated thermal input of the unit in Btu/hr (W) for oil and cubic feet per hour (cubic centimetre per second) for gas shall be not less than the specified capacity (see 6.2). For combination burners, the requirements herein for separate oil-fired and gas-fired burners shall apply.
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