18 7080-131B March 14, 2014MT VERNON E23 in. to 6 in.Offset AdapterSilicone RearExhaust Outlet3 in. to 3 in. TopVent AdapterClean-OutCoverDrill Hole, 1on each sideC. Top Vent Adapter Installation3 to 3 inch (76-76mm) Top Vent Adapter3 to 6 inch (76-152mm) Top Vent Offset AdapterInstalling the Top Vent Adapter1. Put a layer of high temperature silicone on the 3 inch(76mm) exhaust outlet. Do not put silicone inside ofpipe. Figure 18.1.2. Slide the top vent adapter onto the rear exhaust outletand adjust the assembly to a vertical position until thetop of the flue outlet is centered and is in a level position.Figure 18.1.3. Align slot on left of adapter with hole in the back of theunit and secure with screw. You may drill out the holeusing #26 drill bit provided but only if needed. Figure18.2.4. Install the 5 mounting screws, 3 on the left and 2 on theright.5. Drill 2 holes with #26 drill bit through the rear exhaustoutlet using the 2 holes already in the short horizontalpipe in the top vent adapter as a guide. Install the screws.6. Install the vent pipe into the top vent adapter (be sureto silicone all joints). To use an existing 6 inch (152mm)vent system, install the 3 to 6 in (76-152mm) offsetadapter before installing vent pipe.7. To clean top vent adapter, open clean-out cover andremove any debris build-up. Figure 18.2.Figure 18.2Figure 18.1D. Rear Vent & Rear Vent to Top Vent AdapterInstallationClean-Out CoverClean-Out CoverFigure 18.3 - Rear Vent AdapterFigure 18.4 - Rear to Top Vent Adapter - 90o1. Put a layer of high temperature silicone on the 3 inch(76mm) exhaust outlet. Do not put silicone inside ofpipe. Figure 18.1.2. Slide the adapter onto the rear exhaust outlet and adjustthe assembly to the appropriate position.3. Install the vent pipe into the adapter (be sure to siliconeall joints)