Legend DV36NG Owner's Manual page 14

5) Mark the wall for a 254x254mm square hole. The center of the square hole should
line up with the centerline of the horizontal pipe. Cut and frame the square hole in the
exterior wall where the vent will be terminated.
Note:
a) The horizontal run of vent must be level, or have a 6.35mm rise for every 305mm
of run towards the termination. Never allow the vent to run downward. This
could cause high temperatures and may present the possibility of a fire.
b) The location of the horizontal vent termination on an exterior wall must
meet all local and national building codes, and must not be blocked or obstructed.
For External Vent Terminal Locations, see diagram in the "Exterior Vent Termination
Locations" section.
6) Insure that the 38mm
clearances to combustible materials are maintained Install the termination cap.
Note: If installing termination on a siding covered wall, a vinyl siding standoff
or furring strips must be used to ensure that the termination is not recessed
into the siding.
7) Before connecting the horizontal run of vent pipe to the vent termination, slide the
Wall Thimble over the vent pipe.
8) Slide the appliance and vent assembly towards the wall carefully inserting the
vent pipe into the vent cap assembly. It is important that the vent pipe extends into
the vent cap sufficient distance so as to result in a minimum pipe overlap of 32mm
inches. Secure the connection between the vent pipe and the vent cap by attaching
the two sheet metal strips extending from the vent cap assembly into the outer wall
of the vent pipe.
9) Install wall thimble in the center of the square and attach with wood screws (see
diagram below)
14