FIGURE 14: VERTICAL VENT SYSTEM (below grade) INSTALLATION
FIGURE 14 demonstrates a Harvester installed below grade (such as in a non-walkout basement.) Do not substitute an elbow (of any angle) in place of the clean out tee shown in FIGURE 14. Use of an elbow will limit exhaust gasses and cause the combustion chamber to operate inefficiently. A clean out tee should be checked regularly during the first six months of use until the homeowner determines the frequency of cleaning required to ensure proper operation of the Harvester. A certified installer should take into account all site specific conditions that may impact the installation and operation of the below grade Harvester.
Type L or Type PL Pellet Vent systems, offered in 3” or 4” diameters, has been designed and approved for use in pellet and corn stoves and low temperature venting systems. Type L vents is rated for temperatures up to but not exceeding 5700 F. Pellet venting systems feature a complete product line that includes wall thimbles for horizontal through-the-wall installations, support boxes for both flat and cathedral ceiling installations and even decorative wall thimbles and ceiling covers are available. Vent pipe is normally designed as double-wall, air-insulated or full insulated liner that provides superior performance and safety. Normally the inner wall is stainless steel; the exterior wall is galvalume steel that provides maximum heat and corrosion resistance.
Pellet vent system installations should avoid long horizontal runs, excessive use of elbows or failing to provide for clean-out of the vent system. Be sure to use a pipe adapter that ensures a proper connection from the appliance to the vent system. Do NOT use a 90-degree elbow off the back of the Harvester.
