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Be sure to put these self adhesive tags on the item in that crate or box. For the boiler, the CP tag should be placed next to the boiler ratings plate. The side of the boiler to your left as you face the front of the boiler will be referred to in these instructions as the Left End (LE); the side to your right will be referred to as the Right End (RE). NOTE: Installations must conform with the requirements of local utilities, or any local, state, or insurance requirements or codes having jurisdiction and with the National Fuel Gas Code, ANSI Z223.1-1974. Boilers must be installed in accordance with our instructions so as not to void our warranty. CHIMNEY OR VENT REQUIREMENTS (alto rofor to Broaching Erection) The chimney or vent should not be smaller than the size recommended on the last page of these instructions under Ratings—Dimensions—Engineering Data. The chimney or vent should extend high enough above the building or any other obstruction so that wind from any direction will not strike from an angle above horizontal and thus produce down drafts. In most cases a chimney or vent extended at least 2 feet above the highest part of the roof or other structure within 30 feet will be sufficient A lined chimney is preferred and must be used when required by federal, state, or local building codes. Vitreous tile linings with joints which prevent the retention of moisture and linings made of noncorrosive materials are advantageous. Advice regarding recommended practice and material for flue connections and chimney linings can usually be obtained from the local gas utility and should be given careful consideration. If a Type B or TVpe C vent is acceptable and is used, the instructions relative to the size and height contained in the •American National Standard National Fuel Gas Code . Z223.1-1974 in the United States and CGAB149 Installation Code for Gas Burning Appliances and Equipment in Canada should be followed. The chimney should be examined before the gas boiler is installed to be certain that it is properly constructed, clear, and will freely conduct the products of combustion to the atmosphere. The breeching connection must be above the extreme bottom of the chimney to avoid stoppage. The breeching must not enter the chimney so far as to obstruct the chimney. A thimble or slip joint should be used where the breeching enters the chimney to allow removal for cleaning. Do not place a damper or any other obstruction in the breeching. Where two or more gas appliances vent into a common chimney or vent, the equivalent area of the common chimney or vent should be at least equal to the area of the vent outlet on the largest appliance plus 50 percent of the area of the vent outlet onthe additional appliance. AIR SUPPLY FOR BOILER ROOM Provisions must be made to supply sufficient dean air to the boiler room at all times. In buildings of conventional frame, brick, or stone construction without enclosed utility rooms, basement storm windows, or tight stair doors, infiltration is normally adequate to provide air for combustion and dilution of combustion gases at the draft hood. For installation in an enclosed utility or boiler room without an outside wall, two fresh air openings are required (one near the top and one near the bottom of the room). When all the air comes from inside of the building, each opening should have a minimum free cross sectional area of at least 1 square inch for each 1,000 BTU per hour of boiler input When all the air comes from outside and is directly connected to the boiler room or is connected to the boiler room with vertical ducts of equal area, each opening should have a minimum free cross sectional area of at least 1 square inch for each 4,000 BTU per hour of boiler input When all the air comes from outside and is connected to the boiler room with horizontal ducts of equal area, each opening should have a minimum free cross sectional area of at least 1 square inch for each 2,000 BTU per hour of boiler input IMPORTANT PRECAUTIONS Follow the wiring diagram furnished with the boiler or the wiring diagram label located on the inside of the jacket door. The operating instruction plate is located on' the jacket interior panel and should be carefully followed. The Types P-CG and CGM boilers are A.G.A. design certified and C.G.A. approved for natural and propane gases. For natural gas, the inlet gas pressure to the boiler should be 5 inches to 14 inches water column. If the inlet gas pressure exceeds 14 inches water column, a pressure regulator should be installed upstream of the boiler hand valve; the pressure regulator should be of the 100 percent lock-up type and should not permit gas pressures in excess of 14 inches water column. For propane, the inlet gas pressure to the boiler gas valve should be 11 inches to 13 inches water column; the pressure regulator (furnished by the gas-supplier) must provide lock-up pressures not exceeding 14 inches water column. The gas orifices assem...