kn series gas boiler installation & operating ... - Agencespl.com

Page 4KN INSTALLATION AND OPERATION INSTRUCTIONSBuildings will require the installation of a fresh air ductor other means of providing make-up air if the intakeair option isn't used. Any building utilizing other gasburning appliances, a fireplace, wood stove or any typeof exhaust fan must be checked for adequatecombustion air when all of these devices are inoperation at one time. Sizing of an outside air duct mustbe done to meet the requirements of all such devices.WARNING: Never operate the KN-10 in anenvironment subjected to a negative pressureunless it is Direct Vented. Failure to comply withthis warning can result in excessive levels ofcarbon monoxide causing severe personalinjury or death!All Air From Inside The BuildingIf the boiler is to be located in a confined space theminimum clearances listed in Table 1 must bemaintained between it and any combustible construction.When installed in a confined space without the intakeair option two permanent openings communicating withan additional room(s) are required. The combinedvolume of these spaces must have sufficient volume tomeet the criteria for an unconfined space. The total airrequirements of all gas utilization equipment, fireplaces,wood stoves or any type of exhaust fan must beconsidered when making this determination. Eachopening must have a minimum free area of 1 in 2 /1000Btu/hr, 2200 mm 2 /kW based on the total input rating ofALL gas utilization equipment in the confined area. Eachopening must be no less than 100 in 2 , 64,516 mm 2 insize. The upper opening must be within 12 in, 300 mmof, but not less than 3 in, 80 mm from, the top of theenclosure. The bottom opening must be within 12 in,300 mm of, but not less than 3 in, 80 mm from, thebottom of the enclosure.All Air From Outside The BuildingWhen installed in a confined space without the intakeair option two permanent openings communicatingdirectly with, or by ducts to, the outdoors or spaces thatfreely communicate with the outdoors must be present.The upper opening must be within 12 in, 300 mm of,but not less than 3 in, 80 mm from, the top of theenclosure. The bottom opening must be within 12 in,300 mm of, but not less than 3 in, 80 mm from, thebottom of the enclosure.Where directly communicating with the outdoors orcommunicating with the outdoors through vertical ducts,each opening shall have a minimum free area of 1 in 2 /4000 Btu/hr, 550 mm 2 /kW of the total input rating of allof the equipment in the enclosure.When ducts are used, they must have the same crosssectionalarea as the free area of the opening to whichthey connect.Table 2 - Make-up Air Duct SizingRequired Cross Sectional Duct AreaInput 1/4 in, 6.4 mm Metal Wooden(MBH) Wire Screen Louvers Louversin 2 cm 2 in 2 cm 2 in 2 cm 2600 150 967 200 1292 600 38691000 250 1612 334 2154 1000 64482000 500 3224 668 4308 2000 12,896When calculating the free area necessary to meet themake-up air requirements of the enclosure,consideration must be given to the blockage effects oflouvers, grills and screens.Screens must have a minimum mesh size of 1/4 in,6.4 mm. If the free area through a louver or grill is notknown ducts should be sized per Table 2 above.Direct Intake Air Option - GeneralThis configuration provides combustion air directly to theboiler’s air intake using a dedicated pipe when using thedirect vent option. Combustion air can be drawn inhorizontally through an outside wall or vertically throughthe roof, see Figures 1, 2, 3 & 4. It must be sized perTable 3.WARNING: Each boiler must have it’s own intakeair system. Common intake air systems are notto be used! Improper installation can result inexcessive levels of carbon monoxide which cancause severe personal injury or death!Single wall galvanized smoke pipe, single wall aluminumpipe, flexible aluminum pipe, PVC or CPVC pipe can beused for the intake air pipe.Table 3 - Intake Air Pipe SizingModelPipe DiameterSize in 2 mm 2600 5 1271000 6 1522000 9 229All joints in metal intake air systems must be securedusing corrosion resistant fasteners and sealed using asuitable Silicone caulk. If PVC or CPVC is used, thejoints must be cleaned with a suitable solvent andconnected using a solvent based PVC cement. Theintake air system MUST be supported by the buildingstructure not the boiler.Where communicating with the outdoors through horizontalducts, each opening shall have a minimum freearea of 1 in 2 /2000 Btu/hr, 1100 mm 2 /kW of the totalinput rating of all of the equipment in the enclosure.