Assessments - 2, GPA: 4.5
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(1121Pa) for natural gas and 11.0” w.c. (2740Pa) for L.P. gas; the maximum gas supply pressure is 10.5: w.c. (2615Pa) for natural gas and 13” w.c. (3238Pa) for L.P. gas. P250 ONLY Input BTU/Hr. (kW/Hr.) Floor Area Sq. Inches (mm2) Preferred Width and Length (mm) Recommended Minimum Wall Thickness Recommended Minimum Floor Construction 50,000 (14.65) 49 (31610) 7(177.8)x7 (177.8) 2 1/2” (63.5mm) insulating firebrick plus back up of 1 1/2” (38.1mm) or more loose insulation. 2 1/2” (63.5mm) Insulating firebrick plus 1 1/2” (38.1mm) asbestos or magnesia block. 85,000 (24.91 56 1/4 (36290) 7 1/2(190.5)x7 1/2(190.5) 100,000(29.31) 64 (41290) 8(203.2) X 8(203.2) 120,000(35.17) 72 1/4 (46610) 8 1/2(215.9) x * 1/2(215.9) 140,000(41.03 81 (52260) 9(228.6) x 9(228.6) 154,000(45.13) 90 1/4 (58230) 9 1/2(241.3) x 9 1/2(241.3) 175,000(51.29) 100 (64520) 10(254) X 10(254) 210,000(61.55) 122 (78710) 11(279.4) X 11(279.4) 240,000(70.34) 144 (92900) 12(304.8) x 12(304.8) 250,000(76.2) 156 1/4 (100800) 12 1/2(317.5) X 12 1/2(317.5) FIGURE 5 P265 ONLY Input BTU/Hr. (kW/Hr) Floor Area Sq. Inches (mm2) Preferred Width and Length (mm) Recommended Minimum Wall Thickness Recommended Minimum Floor Construction 65,000 (19.05) 63 (40650) 7 (177.8) x 9 (228.6) 2 1/2” (63.5mm) insulating firebrick plus back up of 1 1/2” (38.1mm) or more loose insulation. 2 1/2” (63.5mm) insulating firebrick plus 1 1/2” (38.1mm) asbestos or magnesia block. 75,000 (21.98) 71 1/4 (45970) 7 1/2 (190.5) x 9 1/2 (241.3) 100,000 (29.31) 180 (116100) 7 1/2 (190.5) x 9 1/2 (241.3) 150,000 (43.96) 200 (129000) 12 (304.8) X 15 (381) 200,000 (58.61) 220 (141900) 13 (330.2) x 17 (431.8) FIGURE 5A P265F ONLY Input BTU/Hr. (kW/Hr.) Floor Area Sq. Inches (mm2) Preferred Width and Length (mm) Recommended Minimum Wall Thickness Recommended Minimum Floor Construction 65,000 (19.05) 63 (40650) 7 (177.8) x 9 (228.6) 2 1/2” (63.5mm) insulating firebrick plus back up of 1 1/2” (38.1mm) or more loose insulation. 2 1/2” (63.5mm) insulating firebrick plus 1 1/2” (38.1mm) asbestos or magnesia block. 75,000 (21.98) 63 (40650 7 (177.8) x 9 (228.6) 100,000 (29.31) 71 1/4 (45970) 7 1/2 (190.5) x 9 1/2 (241.3) 150,000 (43.96) 110 (70970) 10 (254) x 11 (297.4) 200,000 (58.61) 165 (106500) 11 (297.4) x 15 (381) FIGURE 5B 6 ELECTRICAL WIRING The power burner is shipped completely wired. It is only necessary to supply the 115 volt circuit, thermostat and limit circuit. All wiring must conform with the National electric Code or the code legally authorized in the locality where the installation is being made. The burner, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA No. 70-1987. See wiring diagrams, Figures 12&13. If an external electrical source is utilized, the conversion burner, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code ANSI/NFPA No. 70-1987. CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. LIMIT CONTROL SWITCHES Warm air furnaces (gravity and forced air) should be equipped with an automatic temperature limit control switch. Hot water boilers (forced or gravity) should be equipped with an automatic temperature limit control switch. Steam or vapor boilers be provided with means to guard against firing a dry boiler or one in which the water is dangerously low. IMPORTANT: On installations where an oil burner replaced with a gas burner, the controls on the boiler or furnace will have to be checked for compatibility with the gas burner. All controls should be checked to insure that they operate properly and that they are in good condition. In no case should any limit or safety control be bypassed or wired in such a manner that it will result in unsafe operation of the burner or appliance. If the controls on the appliance are not compatible with the burner operation they should be replaced with the proper controls. THERMOSTAT The thermostat should be installed on an inside wall and should be located in the natural circulating path of room air. Locations which would expose the thermostat to cold air, or drafts from windows, door, or openings leading to the outside, or to air currents from cold or warm air registers, or where the natural circulation of air is shut off such as behind doors, above or below mantels, shelves or in corners, should be avoided. The thermostat should not be exposed to heat from nearby radiators, lamps, rays of the sun or mounted on a wall near pipes, warm air ducts or chimney flue. Any hole in the plaster or panel through which the thermostat wires pass should be sealed to prevent drafts. The maximum comfort to be obtained from any automatic heating installation is dependent to a great extent upon the proper installation and adjustment of...
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