warning - Nordyne

ElbowCombustionAirIntakeExhaustVent1"A18" Min.36" Max.AExhaustPlumbing Vent Roof Boot(Typ. Both Pipes)A= 12” Above Roof or Snow Accumulation LevelFigure 23. Vertical Vent TerminationVent and combustion air piping may be installedin an existing chimney which is not in use providedthat:a. Both the exhaust vent and air intake runthe length of the chimney.b. The top of the chimney is sealed andweatherproofed.c. The termination clearances shown inFigure 23 are maintained.d. No other gas fired or fuel-burning equipmentis vented through the chimney.Vent Freezing ProtectionWhen the vent pipe is exposed to temperaturesUpflow ModelsAbelow freezing, i.e., when it passes throughunheated spaces, chimneys, etc., the pipemust be insulated with 1/2 inch thick spongerubber insulation, Armafl ex-type insulation orequivalent. Insulating pipe is important to avoidcondensate icing.For extremely cold climates or for conditions ofshort furnace cycles (i.e. set back thermostatconditions) the last three feet of vent pipe can bereduced one nominal pipe size provided that thetotal vent length is at least 15 feet in length andthe vent is sized in accordance with the ventingrequirements (Table 5) before this reduction isapplied. (Example: 3” to 2-1/2” or 2” to 1-1/2”)Smaller vent pipes are less susceptible to freezing,but must not be excessively restrictive.Downflow ModelsACollector BoxCollector BoxLeft SideDrain8""HARD" JDrain TubeRotate counterclockwise (Step 2)Clamp(Loosen For Step 1)(Retighten for Step 3)Route tofloor drain....ORRoute tocondensatepump. Keepdownwardslope.LeftSideDrain8""HARD" JDrain TubeRotate clockwise(Step 2)Clamp(Loosen For Step 1)(Retighten for Step 3)Route tofloor drain....ORRoute tocondensatepump. Keepdownwardslope.26Figure 24. Furnace with Condensate Drain Trap Assembly