Superior Custom WRT40PFWS Installation And Operation Instructions Manual page 10

MINIMUM/MAXIMUM CHIMNEY HEIGHT
The minimum height of the chimney (measured from the base of the
fireplace to the flue gas outlet-end of pipe) is 16 feet for a straight run,
16 feet minimum for a run with 1 elbow set and 25 feet minimum for
a run with 2 elbow sets. (A set consists of one starter elbow and one
return elbow.)
Uncommon circumstances such as neighboring hills, tall trees, or
strong wind areas can cause down drafts in chimney system. In such
cases, going beyond the minimum recommended height would be
preferable to provide a better draw.
The fireplace height approved for any chimney run with this fireplace
system is 40 feet measured from bottom of firebox to flue outlet-end
of pipe (see Figure 22).
WARNING: Do not operate an unvented gas log
set in this fireplace with the chimney removed.
RLT-12D RLT-12D
Storm
Collar
Flashing
Minimum
Height
15 Ft.
Firestop
Spacer
Figure 22 - Maximum Chimney Height
10
VENTING INSTALLATION Continued
STL-12D
Maximum
Height
Chase
Termination
50 Ft.
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PENETRATING ROOF
To maintain a 2" clearance to pipe on a roof with a pitch, a rectangular
opening must be cut.
1. Determine center point where pipe will penetrate the roof.
2. Determine center point of the roof. Pitch is the distance the roof
drops over a given span, usually 12". A 6/12 pitch means that the
roof drops 6" for each 12" one measure horizontally down from
roof rafters.
3. Use roof opening chart (Figure 23) to determine correct opening
length and flashing required.
4. Remove shingles around opening measured. Cut out this section.
5. Add next sections of pipe until end penetrates roof line. Check to see
that proper clearances are maintained. Extend chimney by adding
sections of double wall pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination and chimney must extend
a minimum of 36" above highest point where it passes through the
roof (see 10-Foot Rule and Figure 21, page 9.
19" Min.
(48.26cm)
2" Min.
(5.08cm)
2" Min.
(5.08cm)
Pitch Slope Opening "A"
Flat 0°
0-6/12 26.6°
6/12-
45°
12/12
Figure 23 - Roof Opening Measurements
FLASHING INSTALLATION
Determine flashing to be used with roof opening chart. Slide flashing
over pipe until base is flat against roof. Replace as many shingles as
needed to cover exposed area and flashing base. Secure in position
by nailing through shingles (see Figure 24). DO NOT NAIL THROUGH
FLASHING CONE.
30" Min.
(76.2cm)
2" Min.
(5.08cm)
Opening
"A"
Used Flashing
Max. Model No.
19" V6F-10DM
23.25" V6F-10DM
30.75" V12F-10DM
126616-01A