Page 9
Front
NOTE - Do not install the furnace on its front, back or in the horizontal position
Back
Horizontal
FIGURE 12 
 WARNING
Improper installation of the furnace can result in personal 
injury  or  death.  Combustion  and  ue  products  must 
never be allowed to enter the return air system or air 
in the living space. Use sheet metal screws and joint 
tape to seal return air system to furnace. In platform 
installations with furnace return, the furnace should be 
sealed airtight to the return air plenum. A door must 
never be used as a portion of the return air duct system. 
The base must provide a stable support and an airtight 
seal to the furnace. Allow absolutely no sagging, cracks, 
gaps, etc. For no reason should return and supply air 
duct systems ever be connected to or from other heating 
devices such as a replace or stove, etc. Fire, explosion, 
carbon monoxide poisoning, personal injury and/or 
property damage could result.