Installations With Through The Roof Vertical Termination - Valor 535 XAN Installation And Owner's Manual

9. INSTALLATIONS WITH THROUGH THE ROOF VERTICAL
• Check the roof pitch to determine which roof flashing will be needed -
see vent accessories section 2.4.
• The distance from the roof to the lowest terminal discharge opening
("H" in figure 25) depends on the roof pitch and must be in accordance
with the Dura-vent instructions supplied with the termination unit.
Note: The venting system for these appliances is considered to be a
Special Venting System. The rule in the Installation Code requiring a
minimum vent height of 2ft above any portion of a building within 10ft
does not therefore apply.
• The minimum clearances to combustible materials all round the vent
pipes must be in accordance with the dimensions shown in section 4 of
this manual.
• Drop a plumb from the ceiling to the center of the appliance vent
opening. Mark the position on the ceiling. Drill a small hole at the
marked position.
• Determine the position where the vent will pass through the roof. If
directly above the position where it penetrates the ceiling, drop a plumb
from the roof to the small hole in the ceiling and mark the roof at this
spot.
If rafters or other obstructions will prevent a vertical exit or if clear attic
space is desired, the roof outlet can be offset using 45º elbows - see fig.
25.
Drill a small hole at the marked position.
• A ceiling fire stop must be installed at the second floor and higher
floors.
A ceiling support should be used below the flat ceiling.
To install the fire stop & support cut and frame a 10" (254mm) square
hole centered on the small hole previously drilled - see fig. 26.
• Fit vent accessory elbows and pipe lengths as required up through
ceiling support boxes and fire stops.
If installation includes offset, support the offsetting pipes every 3 feet
(1m) with wall straps (fig. 25).
• Cut a hole in the roof centered on the small hole. The hole
must allow for the minimum clearances to combustible
materials - see section 4.
• Fit pipe lengths through the roof. Fit roof flashing
securing it with roofing nails.
• Fit storm collar and termination cap.
TERMINATION
Fig 26 Fire stop hole
21
Fig 25 Through the roof installation