ICP *9MPT050F12 Installation Instruction

Contents

440 01 2021 0126INLETEXHAUSTIN ONOFFVENTFigure 18 Connecting Tee Trap to CondensateTrap and Main Drain LineOpen TeeTee TrapCondensate TrapEvaporatorCoilDrain Line(Optional)MainDrainLineThe Tee Trap must be connected to the main condensate drainline as conceptually shown above. Different installations mayrequire slightly different orientations. The following steps applyto all installations.1. The Tee Trap should be installed as close to the side or topof the furnace as practical. Minimize the distance betweenthe inducer and the Tee Trap as much as possible.2. An open tee is to be used at the Tee Trap discharge. The topend of the tee should be open to the atmosphere to elimi-nate potential air lock problems.3. The drain line from the Tee Trap is to be connected to thefurnace condensate trap drain line as shown above.4. Condensate drain lines from a cooling coil may be con-nected downstream of the connection point of the Tee Trapand Furnace Condensate Trap.Important: Prime both traps with water before operation.Failure to prime the traps may result in discharge of flue gasesfrom the condensate drain line and open tee for a period oftime, and may result in temporary lockout of the furnace uponstart up. Main drain line construction is left to the discretion ofthe installer. It may be made of either ridged pipe or flexibletube. Tube ID should NOT be less than 1/ 2.Connecting Vent and Combustion Air PipingCARBON MONOXIDE POISONING HAZARDFailure to properly seal vent piping could result indeath or personal injury.Cement or mechanically seal all joints, fittings, etc.to prevent leakage of flue gases.! WARNINGRefer to Figure 9 through Figure 17 that corresponds to theinstallation position of the furnace for the application.Preassemble the vent and combustion air piping from the furnaceto the vent termination. Do not cement the pipe joints until the pipepreassembly process is complete.Combustion Air Pipe Connection (Direct Vent)Install the air intake coupling and gasket to the furnace with thefour(4) screws.Note: The air intake coupling and gasket can be installed to the toppanel to the alternate air intake locations on either the left or rightside panels of the furnace.For downflow installation, the air intake coupling and gasket mustbe installed to the alternate air intake location on either the left orright side panels. Remove the 3 hole plug from the side panel andrelocate to the air intake hole in the top panel. Use four screws toseal the four(4) mounting holes in the top panel next to the holeplug. Drill four(4) 7/ 64 diameter holes in the casing using the airintake coupling as the template.The air intake coupling is sized for 2 PVC pipe.Install the combustion air pipe to the air intake coupling using RTVsealant to provide for future serviceability.Vent Pipe ConnectionInstall the vent pipe grommet to the furnace panel. Locate thegrommet in the furnace panel at a location directly away from thevent fitting on the combustion blower. The grommet snaps into the3 hole plug from the furnace panel. NOTE: Depending on theinstallation position, the vent pipe grommet will be installed to thetop panel or to the alternate location on the side panels. If needed,remove the 3 hole plug from the furnace panel and relocate to theopen hole in the furnace panel. (See Figure 9 or Figure 18)Install the vent pipe to the rubber coupling, the vent fitting or thePVC vent extension pipe. Securely attach using the clamp or PVCcement as required.Note: The vent fitting MUST be installed with the air flowmarking arrow pointed toward the vent pipe. (See Figure 19)Some installations require the vent fitting to be installed witha 5 to 10 downward slope. (See Figure 9 thru Figure 18)Rubber Coupling& ClampsDrain TeeCombustionBlowerVent Fitting& Clamps25--24--14aVent ExtensionPipe (Side PanelExit)Vent Pipe(Top Panel Exit)Vent PipeRotate downward5 to 10NOTE: Built--in channel will be angled 5 to 10 also.SIDE VIEWTee TrapFigure 19 Proper Sealing Procedure forCombustion Blower