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251 1.7 times the calculated hO'lrly BTU heat loss of the building in which it is installed. The appliance shall Qe allowed to operate until the stack temperature becomes stabilized, after which a sample of the flue prod- ucts shall be taken at a point in the flue after the outlet of Im.e appliance but ahead of the draft hood, and analyzed for carbon diOXide, carbon monoxide and oxygen. 6-204 The various controls of the appliance shall be checked by both in- spector and installer, to insure the'iT proper operation. Upon completion of the test of any nswly installed gas burning equip.. ment as hereinafter provided in 6-201, the installer shall file with the Heating Inspector, in duplicate complete records of .such test. 6-205 The owner and / or occupant shall be thoroughly instructed by the in- staller as to the proper and safe operation of the appliance before it is placed in sernce, such instructions to include actl.\8l demonstration to the customer or his authorized agent of the process.ss of lighting and turning off the gas burner. A printed set of instructions, en- closed in an envelope labeled "Instructions to Customer, It shall bj securely attached to the gas valve. 6-206 A metallic plate" suitable etched or stamped" setting fort.h detailed t instructions for. the safe lighting and shutting off of the appliance, shall be permanently attached to the appliance in a prominent position near the lighting apert.ures. The size and type used shall be not smaller than ten (10) point and the wording contained "hereon shall be subject to the approval of the Heating Inspector. This plate shall "J~ also state make and model numbers of the burner and show the rate hourly gas BTU input. EXGEEDING 400,000 BTU PER HOUR 6-207 The construction arrangement, manner of inatlllation, alteration and repair of all gas burners in siseam and hot water boilers, furnaces and air heaters having an input capacity exceeding 400,000 BTU per hour, and for power, industrial and process uses shall conform to the follow- ing provisions of this dode. The 'requirelll8nts for installation of gas burning equipment in power boilers as adopted by the Ameriean Standards Association, sponsered by the American Gas Association, shall be consid- ered herein as minimum re qui reJllen ts. 6-208 All burners shall be accOlIlpanied by complete and comprehensive in- stallation and operating instructions. 6-209 Where burners are equipped with secondary air shutters or louvres, they must be so designed or counter-balanced. so as to drop to a wide open posi tion in the event of failure or 'breakage of connecting liilkage. They shall also bj of sufficient area to supply adequate air for complete combustion under specified draft conditmons and. at the maximum rate of firing. 6-210 The air intake on power burners must be protected wi th means to preveIi,j accidental closure by debris being pulled over inlet by suction of blower. 6-211 The burner or burners shall be located according to the manufacturers' - instructions and shall be so secured that they will not slide, twist or drop out of position. -48-