Quadra-Fire Direct Vent Room Heater 839-1390 Owner's Manual page 13

Step 3.
For installations using a round support box/wall thimble
(check pipe manufacturer's instructions), mark the wall for a
10 in. x 10 in. (254mm x 254mm) square hole. The center
of the square hole should line up with the center line of the
horizontal pipe, as shown in Figure 5.5. Cut and frame the
hole in the exterior wall where the vent will be terminated. If
the wall being penetrated is constructed of noncombustible
material, i.e. masonry block or concrete, a 7 in. (178mm)
diameter hole is acceptable.
Center Line
Center Line
45° Elbow in Corner Installation
Wall Thimble
14 in. (356mm) Pipe Length
45°
Elbow
1 in. (25mm) Clearance from stove
corner to combustible wall.
When installing the Sapphire in a rear vent configuration with no
vertical rise: a Snorkel Kit must be used, and a derating orifice
must be installed. The appropriate orifice is supplied with the
Rear Vent Kit.
Figure 5.5
September 1, 2008
Center of Hole
Center Line
Wall Thimble
Center of H
Center Line
Wall Thimble
Max. Wall Depth =
10 in. (254mm)
1 in. (25mm) Clearanc
from stove corner to
combustible wall.
Quadra-Fire · Sapphire · 250-7233H
NOTE:
(1) Installation requires a minimum of 11 in. (279mm)
horizontal run. Each 1 ft. (305mm) of horizontal vent
run must include a 1/4 in. (6mm) of vertical rise towards
the termination. Never allow the vent to run downward.
This could cause high temperatures and may present
the possibility of a house or structure fire.
(2) The location of the horizontal vent termination on an
exterior wall must meet all local and national building
codes, and must not be easily blocked or obstructed,
see Figure 4.4 on page 9.
(3) For installations requiring a vertical rise on the exterior
of the building, a snorkel kit is available with a 14 in.
(356mm) and a 36 in. (914mm) tall snorkel termination
cap. Follow the same installation procedures as used
for standard horizontal terminations. If the
termination must be installed below grade (i.e. basement
application), proper drainage must be provided to
prevent water from entering the snorkel termination. Do
not backfill around snorkel termination.
Step 4.
Position the horizontal termination cap in the center of the 10
in. x 10 in. (254mm x 254mm) square hole and run a bead
of non-hardening mastic around its outside edges, so as to
make a seal between it and the wall, attach termination cap
to the exterior wall with the four wood screws provided. The
arrow on the vent cap should be pointing up (Figure 5.6).
Figure 5.6
NOTES:
(1) The four wood screws provided should be replaced with
appropriate fasteners for stucco, brick, concrete, or
other types of sidings.
(2) A termination cap with a built-in vinyl siding standoff is
highly recommended on a building with vinyl siding. The
pilot hole will be 2 in. (51mm) closer to the bottom of the
square than the top. Using a framing square, draw a 14
in. x 14 in. (356mm x 356mm) square around the pilot
hole in the siding. See Figure 5.7 on the next page.
WOOD
SCREW
HOT
WALL THIMBLE
Page 13
snorkel