Lennox Compact Pro Installation Operating & Maintenance Manual page 21

Installation
Chosen the place of installation, make the hole in the wall using the drilling template
(A), open the box by taking the screw on the right side out (B). To fix the box to the wall use
the screws that are given in the pack (C).
Attention
Be very careful in order not to damage the card and its components during the fixing
procedure. Follow strictly the table when arranging the electrical connection.
Fixing Dimensions