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Ce Smith. Commercial Gas <br /> Water Heaters <br /> OTHER FEATURES: CODES AND STANDARDS <br /> SPACE-SAVING DESIGN FOR INSTALLATION FLEXIBILITY • CSA certified and ASMErated T&P relief valve <br /> • Easy-to-remove top cover for convenient access to serviceable parts • Maximum hydrostatic working pressure: 160 psi <br /> • 0"installation clearances on sides and rear, 1-1/2"installation • All models are design certified by Underwriters Laboratories(UL), <br /> clearance on top Inc.,to ANSI Z21.10.3-CSA 4.3 Standards <br /> • Handhole cleanout allows easy access to tank interior for cleaning • Meets the thermal efficiency and standby loss requirements of the <br /> • O"clearance to combustibles,approved for installation on U.S.Department of Energy and current edition ASHRAE/IES 90.1 <br /> combustible floors • Design Certified by Underwriters Laboratories to NSF standard 5 for <br /> 180°F(62°C)water <br /> • Complies with SCAQMD Rule 1146.2 and other Air Quality <br /> Management Districts with similar requirements for ultra low-NOx <br /> emissions <br /> • ASME tank construction optional On 120-500 model sizes <br /> VENT REQUIREMENTS FOR BTH 120(A) - 250(A) VENT REQUIREMENTS FOR BTH 300(A) - 500(A) <br /> Number of 90° 3 Inch Pipe 4 Inch Pipe Number of 90° 4 Inch Pipe 6 Inch Pipe <br /> Elbows Installed Maximum Feet Maximum Feet Elbows Installed Maximum Feet Maximum Feet <br /> (Meters) (Meters) (Meters) (Meters) <br /> One(1) 45 feet(13.7 meters) 115 feet(35 meters) One(1) 65 feet(19.8 meters) 115 feet(35 meters) <br /> Two(2) 40 feet(12.2 meters) 110 feet(33.5 meters) Two(2) 60 feet(18.2 meters) 110 feet(33.5 meters) <br /> Three(3) 35 feet(10.7 meters) 105 feet(32 meters) Three(3) 55 feet(16.8 meters) 105 feet(32 meters) <br /> Four(4) 30 feet(9.1 meters) 100 feet(30.5 meters) Four(4) 50 feet(15.2 meters) 100 feet(30.5 meters) <br /> Five(5) N/A 95 feet(29 meters) Five(5) 45 feet(13.7 meters) 95 feet(29 meters) <br /> Six(6) N/A 90 feet(27.4 meters) Six(6) 40 feet(12.2 meters) 90 feet(27.4 meters) <br /> GAS PRESSURE REQUIREMENTS <br /> Model Number Manifold Pressure Minimum Supply Pressure Maximum Supply Pressure <br /> Natural Gas Propane Gas Natural Gas Propane Gas Natural Gas Propane Gas <br /> BTH-120(A) 0"W.C.(0 kPa) 0"W.C.(0 kPa) 3.5"W.C.(1.10 kPa) 8.5"WC.(2.12 kPa) 14"WC.(3.49 kPa) 14"W.C.(3.49 kPa) <br /> BTH-150(A) 0°W.C.(0 kPa) 0"W.C.(0 kPa) 3.5"W.C.(1.10 kPa) 8.5"WC.(2.12 kPa) 14"WC.(3.49 kPa) 14"W.C.(3.49 kPa) <br /> BTH-199(A) 0-W.C.(0 kPa) 0"W.C.(0 kPa) 3.5"W.C.(1.10 kPa) 8.5"W.C.(2.12 kPa) 14"W.C.(3.49 kPa) 14-W.C.(3.49 kPa) <br /> BTH-250(A) 0"W.C.(0 kPa) 0"W.C.(0 kPa) 3.5-W.C.(1.10 kPa) 8.5"WC.(2.12 kPa) 14"WC.(3.49 kPa) 14"W.C.(3.49 kPa) <br /> BTH-300(A) 0"W.C.(0 kPa) 0"W.C.(0 kPa) 4.8"W.C.(1.19 kPa) 8.5"W.C.(2.12 kPa) 14"W.C.(3.49 kPa) 14"W.C.(3.49 kPa) <br /> BTH-400(A) 0"W.C.(0 kPa) 0"W.C.(0 kPa) 4.8"W.C.(1.19 kPa) 8.5-WC.(2.12 kPa) 14-W.C.(3.49 kPa) 14"W.C.(3.49 kPa) <br /> BTH-500(A) 0"W.C.(0 kPa) 0"WC.(0 kPa) 4.8-W.C.(1.19 kPa) 8.5"W.C.(2.12 kPa) 14"WC.(3.49 kPa) 14-W.C.(3.49 kPa) <br /> Depending on the installed equivalent length,and/or the number of appliances connected,the supply gas line size may need to be increased beyond the minimum required size. <br /> Page 2 of 6 <br /> AOSCGIO210 <br />