EXHAUST
Open Tee
Tee Trap
Evaporator Coil Drain Line (Optional)
Main
Drain
Line
| INLET |
| VENT |
IN | ON |
| OFF |
Connecting Vent and Combustion Air Piping
!WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
Cement or mechanically seal all joints, fittings, etc. to prevent leakage of flue gasses.
Refer to Fig. 11 through Fig. 19 that corresponds to the installation position of the furnace for the application.
Preassemble the vent and combustion air piping from the furnace to the vent termination. Do not cement the pipe joints until the pipe preassembly process is complete.
Combustion Air Pipe Connection (Direct Vent)
Install the air intake coupling and gasket to the furnace with the four(4) screws.
Note: The air intake coupling and gasket can be installed to the top panel to the alternate air intake locations on either the left or right side panels of the furnace.
For downflow installation, the air intake coupling and gasket must be installed to the alternate air intake location on either the left or right side panels. Remove the 3″ (76.2mm) hole plug from the furnace accessory bag and relocate to the open hole in the furnace panel. Use four screws to seal the four mounting holes in the top panel next to the hole plug. Drill four 7/64″ (2.8mm) diameter holes
58HDV
Condensate
Trap
Representative drawing only, some models may vary in appearance.
A07713
Fig. 20 - Connecting Tee Trap to Condensate Trap and Main
Drain Line
The tee trap must be connected to the main condensate drain line as conceptually shown above. Different installations may require slightly different orientations. The following steps apply to all installations.
1.The tee trap should be installed as close to the side or top of the furnace as practical. Minimize the distance between the inducer and the tee trap as much as possible.
2.An open tee is to be used at the tee trap discharge. The top end of the tee should be open to the atmosphere to eliminate potential air lock problems.
3.The drain line from the tee trap is to be connected to the furnace condensate trap drain line as shown above.
4.Condensate drain lines from a cooling coil may be connected downstream of the connection point of the tee trap and furnace condensate trap.
Important: Prime both traps with water before operation. Failure to prime the traps may result in discharge of flue gases from the condensate drain line and open tee for a period of time, and may result in temporary lockout of the furnace upon start up. Main drain line construction is left to the discretion of the installer. It may be made of either ridged pipe or flexible tube. Tube ID should NOT be less than 1/2″ (12.7mm).
in the casing using the air intake coupling as the template. The air intake coupling is sized for 2″ (50.8mm) PVC pipe.
Install the combustion air pipe to the air intake coupling using RTV sealant to provide for future serviceability.
Vent Pipe Connection
Install the vent pipe grommet to the furnace panel. Locate the grommet in the furnace panel at a location directly away from the vent fitting on the combustion blower. The grommet snaps into the 3″ (76.2mm) hole from the furnace panel. NOTE: Depending on the installation position, the vent pipe grommet will be installed to the top panel or to the alternate location on the side panels. If needed, remove the 3″ (76.2mm) hole plug from the loose parts bag and install it in the open hole in the furnace panel. (See Fig. 11 or Fig. 20)
Install the vent pipe to the rubber coupling, the vent fitting or the PVC vent extension pipe. Securely attach using the clamp or PVC cement as required.
NOTE: The vent fitting MUST be installed with the air flow marking arrow pointed toward the vent pipe. (See Fig. 21). Some installations require the vent fitting to be installed with a 5° to 10° downward slope. (See Fig. 11 thru Fig. 20)
27
