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(b) No device or attachmefit shall be installed on any appliance which in anyway may impair' the combustion of gas (Sob Section 22 - Unauthorized Devices). (7) Every appliance shall be properly adjusted after being installed and the consumer shall be instructed as to its safe opera- tion by the Installer (See Section 21 - =adjustments), (8) h11 vent connected appliances, except incinerators, shall be equipped with draft diverters, approved as to design and capacity. (9) No gas appliance shall be so located that it cannot be readily adjusted. (10) X111 water heaters, all types of central heating'equip- ment, all enclosed fire zone circulating heaters, unit heaters, and floor furnaces hereafter installed shall be connected to adeauate vents, conforming to provisions of Section 20 of this ordinance. (11) Furnaces, boilers, or other types of heating equipment designed to burn a fuel other. than Gas shall not be converted to burn gas until such equipment has be on approved for conversion by the Inspector. (12) .dhore the approval requirements of an appliance are such that a gas appliance pressure regul-tor is required, an approved regulator shall be used. In any ease where a safety type regulator is not used, a breather pipe of not less than one -eight (1/8) inch in size shall be installed from the diaphragm case of the regulator to the outside of the building, or into the combustion chamber of the appliance and adjacent to a constantly burning; pilot, or into the appliance vent beyon_g the draft dive.rter. The breather pipe shall be securely supported and provided with a means of prev�:nting water, dirt or insects from entering the pipe. �;. Floor Furnace Installation (1) The installation of floor furnaces shall be made in accordance with the provisions of this ordinance. (2) No furnace shall be installed in the floor of any aisle or passageway of any auditorium, public hall, or public assembly room. (3) The floor around the furnace shall be braced and head- ed with a framework of material not lighter than the joists. The inside dimensions of the framework shall. be approximately one-half (1/2) inch longer and wider than the furnace to be installed. (),_) 1;11 floor furnaces, including those having single or dual wall register outlets, shall be installed as approved without alterations, extensions, or chanmos of any kind in the furnace. (y) No automatic pilot shut-off shall be installed on a floor furnace that has not been approved for such equipment. (6) All floor furnaces shall b(3 equipped with an approved pressure regulator. (7) The bottom of the floor furnace shall have at least an eitht(8) inch clearance from the ground. 'ldhen that clearance is not present, the ground below and to the sides shall be excavated to form a "basinlike" pit under the furnace so that there is an eight (8) inch clearance beneath the furnace, and an eight(8) inch clearance on all sides except the control side which shall have an eighteen (18) inch clearance. This facilitates any servicing that may be required, and allows ample air for proper combustion. -7-