24 PageInstallationInstallation Manual to install stainless steel vent with the indoor model>4" (102 mm)stainless steelvent straight pipeExhaust vent collarof the Indoor models(Female)Intake vent collar(Female)4" (102 mm)stainless steelvent straight pipe4" (102 mm) vent connection for direct-vent installation1. Connect 4" (102 mm) stainless steel ventstraight pipes directly on the exhaust/intake vent collar of the water heater.Exhaust vent collarof the Indoor models(Female)4" (102 mm)stainless steelvent straight pipeIntake vent collar(Female)4" (102 mm)elbow withbird screen1. Connect a 4" (102 mm) stainless steel ventstraight pipes directly on the exhaust ventcollar of the water heater.2. Connect a 4" (102 mm) elbow directly onthe intake vent collar of the water heater.4" (102 mm) vent connection for single vent installationWARNING• Regarding the clearances from the exhaust terminal to the air inlet or opening, referto pp. 28 to 30.• Follow all vent system manufacturer’s instructions and all local codes.• Use 4” (102 mm) Category III/IV approved or Special BH, single or double wall stainlesssteel vent pipe.• Do not mix parts or fittings of different material types, and do not mix pipe, fittings,or joining methods from different manufacturers. Combustion exhaust can containcarbon monoxide and must be properly vented outside. Breathing abnormalamounts of carbon monoxide can result in serious injury or death.Set DIP switches shown in the table below depending on the vent diameter and length.DIP switch settings :Single pipe and Direct vent installationsVent diameter 4" (102 mm)venting5 to 50 ft(1.5 to 15.2m)(DEFAULT)51 to 100 ft(15.3 to 30.5 m)Lower bankofDIP switches1 2 3 4 5 6 7 8ONNo. 3 : O NNo. 4 : OFF1 2 3 4 5 6 7 8ONNo. 3 : OFFNo. 4 : OFFVentlengthDIPswitchesLower bank of DIP switchesWARNING• To adjust vent length, adjust only the No. 3 and No. 4 DIP switches in theLOWER bank of DIP switches. (See below.) DO NOT adjust the other DIPswitches.• Turn off the power supply to the water heater before changing the DIPswitch settings.• Failure to observe these warnings could lead to carbon monoxide poison-ing or death.
