CT SERIES BOILERS - Columbia Heating

InstallationThe Columbia Model CT Direct Vent Series Steam Boiler is furnished completely piped,wired, and assembled. It has been test fired at the factory and is ready for installation. Thissteam boiler is designed to operate with natural gas, and is suitable for standard AC electricalservice. The CT Series requires the following minimum clearances to combustiblematerial: top, sides, and rear - 18", front - 36", flue vent duct - 18".LocationThe CT boiler must be mounted on a level non-combustible floor, or the floor must be protectedin accordance with the requirements of accepted building code practices. In theabsence of local codes, it is suggested that NFPA-31 section 4-4.1.5 be followed.Flue Vent DuctFor direct venting, galvanized smoke pipe is acceptable, but local codes take precedence.The maximum length of flue vent duct allowed is 40 feet, and at no time can the diameterof the flue vent duct be less than the diameter of the smoke outlet of the boiler, see Tableon the previous page for size. The flue pipe should be sloped upward 1/4" per horizontalfoot of run. All sections of flue pipe should be joined and fastened securely with sheetmetal screws. The maximum number of 90° elbows in the flue vent duct is four. A barometricswing type draft regulator may be installed in the flue vent duct if desired, but is notnecessary.The vent must end with the UL listed vent cap that was shipped with your boiler. the ventcap can be installed either horizontally (Figure 5-A below) or vertically with a tee (Figure5-B below). It is suggested that a screen or vent pipe plug be inserted into the bottom ofthe tee to prevent animals and other matter from entering.Figure 5FM-148 COLUMBIA BOILER COMPANY, REV 6-06- 17 -