Empire Comfort Systems DVCTL60CFP95N Instructions D'installation page 30

Vertical runs of this system which pass through ceilings require the
use of one ceiling firestop at the hole in each ceiling through which
the vent passes.
Position a plumb bob directly over the center of the vertical vent
component and mark the ceiling to establish the center point of the
vent. Drill a hole or drive a nail through this center point and check
the floor above for any obstructions such as wiring or plumbing
runs. Reposition the appliance and vent system, if necessary, to
accommodate ceiling joists and/or obstructions.
Cut a 10 inch x 10 inch hole through the ceiling, using the center
point previously marked. Frame the hole with framing lumber the
same size as the ceiling joists. See Figure 47. If the area above the
ceiling is NOT an attic, position and secure the ceiling firestop on
the ceiling side of the previously cut and framed hole. See Figure
48. If the area above the ceiling is an attic, position and secure the
firestop on top of the previously framed hole. See Figure 49.
NOTE: Remove insulation from the framed area in the attic before
installing the firestop and/or vent pipes.
Page 30
POWER VENT
Figure 47
Figure 48
VENT PIPE CLEARANCE
NOTICE: Maintain one inch of clearance around vertical vent pipe.
See Figure 50.
For horizontal vent, maintain a minimum 1 inch clearance to the
bottom and sides of the vent, and 3 inch clearance to combustibles
above the vent pipe. See Figure 51.
VENT PIPE
1" MINIMUM CLEARANCE AROUND
Figure 49
VERTICAL VENT PIPE
Figure 50
Figure 51
43902-0-1021