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The Excel NE has certain features which the Excel does not have. The NE has a 4" vent stack; a 1" diameter drain assembly, and a bar midway back on the floor of the evaporating chamber to keep any liquid at the rear. In terms of conversion, the installation of a 4" vent stack is required, as is the installation of a 1" drain if the unit is to be used every day. The drain is only recommended if the unit sees residential/everyday use, and the bar on the floor of the evaporating chamber is not normally essential.
Installing the Vent Stack
The 4" vent is comprised of 4" sewer pipe (which is thin wall pipe), connectors to join the lengths of pipe, and an inlet assembly to connect the vent to the toilet. On regular Excel NE units a diffusor is included for the top of the vent stack to aid the drafting and airflow, but this can be omitted. The vent should be erected straight up so that the passive venting induced by the Achimney effect maintains odorless operation.
If a bend has to be put in the vent, or the unit is to be used heavily, then a 12 volt fan should be installed in the vent stack to assist with air flow and evaporation. The standard 12 volt fan is 1.4 watts and comes in an 11" long section of vent pipe. It can be powered by a solar panel and 12 volt battery. If installed it should be working continuously so that it does not form a blockage in the vent. Bends should be kept to an absolute minimum for proper airflow, even with a fan.
To install the vent stack, cut a 4" diameter hole in the top and center of the toilet. (Use the 4" vent pipe as a template for the sizing of this hole) . Drill a hole to get started and then use a fine toothed saw. If you do not envisage the unit being used as an electric unit in the future, you can improve airflow by removing the 110 Volt fan assembly in the back of the unit (this assembly is held on by 4 screws) , unscrew the fan and motor from the fan assembly, and replace the stripped assembly in the rear. Ensure that the 2" vent hole is blocked with a pipe cap, duct tape or similar.
The Drain
A regular NE comes with a 1" drain and hose. When converting an Excel to an NE, obtain, install and connect a 1" drain assembly, and block up the existing Excel Asecurity drains. Installation instructions come with the 1" drain assembly kit.
Keeping Liquid in the Rear
Rather than put a bar across the floor of the evaporating chamber, shim the unit at the front so that liquid remains at the rear. Install a drain if you plan to do this.
To Order Recommended Parts Call 1-888-341-0782
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