Manufactured by Miles Industries Ltd., British Columbia, Canada
31
10.
INSTALLATIONS WITH THROUGH THE ROOF VERTICAL
TERMINATION
10.1.
All Co-axial Vent Installations
1. Check the roof pitch to determine which roof flashing will be
needed - see vent accessories section 2.4.
2.
The distance from the roof to the lowest terminal discharge
opening (“H” in fig. 56) depends on the roof pitch and must be in
accordance with the current CAN/CGA-B149 in Canada or ANSI
Z223.1 in the USA.
3.
The minimum clearances to combustible materials all round the
vent pipes must be in accordance with the dimensions shown in
sections 4 & 5 of this manual.
4.
If rear vent connection to the appliance, fit a 90° Dura-vent DV
GS elbow to the appliance vent adapter.
5.
Place the appliance in its proper location.
6.
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.
7.
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. 56.
Drill a small hole at the marked position.
8. A ceiling firestop must be installed
at the second floor
and
higher floors.
A ceiling support should be used below the flat ceiling.
To install the firestop & support cut and frame a 10” (254mm)
square hole centered on the small hole previously drilled - see fig.
57.
9.
Fit vent accessory elbows and pipe lengths as required
up through ceiling support boxes and firestops.
If installation includes offset, support the offsetting pipes
every 3 feet (1m) with wall straps (fig. 26).
10. Cut a hole in the roof centered on the small hole. The
hole must allow for the minimum clearances to combustible
materials - see sections 4 & 5.
11. Fit pipe lengths through the roof. Fit roof flashing
securing it with roofing nails.
12. Fit storm collar and termination cap.
13. FS installations - Secure the appliance to the floor or
wall if necessary.
10.2.
Co-linear Vent Installations
1. The chimney and fireplace opening sizes are shown in
section 4.2.9 of this manual.
2.
Place the appliance (fitted with the co-linear adapter (see
section 8.5.2) near the fireplace opening but allow space for
manipulating the chimney liners on to the appliance.
3. Drop the Dura-vent DV GS flexible liners into the
chimney from outside.
4. Fit the liners to the co-linear adapter and move the
appliance to its proper position. Be aware of the minimum
liner bend radius and minimum liner horizontal run shown in
section 4.2.9.
Fig 57
Fig 56
5.
Fit the Dura-vent DV GS termination kit and flashing to the exterior of the chimney.
6.
Secure the appliance to the floor or wall if necessary.
