Raypak 1000 Operating And Installation Manual

Raypak 1000 Operating And Installation Manual Manual pdf 27 page image

27SECTION J: VENTING CONNECTIONSGENERALCAUTION: Proper installation of flue exhaust venting is critical for the safe and efficient operation of the boiler.For vent systems not shown in this section please contact your local authorized representative.Definition of Appliance CategoriesBoilers are divided into four categories based on the pressure produced in the exhaust and the likelihood of condensateproduction in the vent.Category I. A boiler which operates with a non-positive vent static pressure and with a vent gas tempera-ture that avoids excessive condensate production in the vent.Category II. A boiler which operates with a non-positive vent static pressure and with a vent gas tempera-ture that may cause excessive condensate production in the vent.Category III. A boiler which operates with a positive vent pressure and with a vent gas temperature thatavoids excessive condensate production in the vent.Category IV. A boiler which operates with a positive vent pressure and with a vent gas temperature thatmay cause excessive condensate production in the vent.See Table J-1 for vent category requirements for the Advanced Design BoilerNote: For additional information on appliance categorization, see appropriate ANSI Z21 Standard and the latestedition Standard of National Fuel Gas Code or in Canada, the latest edition of CGA Standard B149 InstallationCode for Gas Burning Appliances and Equipment, or applicable provisions of local building codes.Determination of Appliance Category for Venting Purposes and Venting ArrangementsWARNING: Contact the manufacturer of the vent material if there is any question about the appliance categori-zation and suitability of a vent material for application on a Category III or IV vent system. Usingimproper venting materials can result in personal injury, death or property damage.