Page 9
DV52 Gas Fireplace
rev.101207
Installation
Figure 12.
Extended installation using a combination of solid and flex venting. Use
the vent graph to determine your allowable run, then select appropriate
components.
Example 2:
Rigid sections and an elbow used in conjunction with 3 ft. flex section (PFL-3) will,
when extended in a five foot chase, allow for a maximum horizontal run of 12' 6"from
the center of the fireplace to outside wall and a minimum of 7'6" when retracted in
the opposite direction. See Figures 12 and 13.
"C" flex sections and "D" rigid sections may be used in conjunction with one another
to obtain different possible horizontal length installations.
NOTE:
Flex section with
no vertical rise must not exceed maximum horizontal length of 3 feet, see Figure 14.
Flex runs over 3 feet must fall within the limits set by the venting graph, and must
have a minimum vertical rise of 3" per foot of flex.
Figure 13.
Retracted installation using a combination of solid and flex venting. Use
the vent graph to determine your allowable run, then select appropriate
components.
Figure 14.
Horizontal flex installation with minimum vertical rise.
B. Vertical (Through-The-Roof) Installations
Vertical rise >12' can be reduced (on applicable models).
Vertical terminations must be installed:
•
minimum 2' (two feet) above the highest point where
vent passes through the roof.
•
minimum 6' (six feet) from a mechanical air inlet
•
minimum 18" (11/2 feet) from a parapet wall.
Maximum vent height is:
•
32 feet above fireplace.
Note: Flame characteristics will change if the maximum vent height is used.
2" minimum clearance between vent and all horizontal combustible materials
must be maintained.
A maximum of two offsets
(each offset has two 90° bends) may be made and
shall not exceed total length of 25% of the vertical vent height, when measured
center to center of piping.
Using this vent installation example:
• 20' vertical vent
• 2 - 2' offsets required
Maximum offset allowed = 25% of 20'or 5'. This venting configuration meets
requirements.
5"/8" Venting
A - Termination
PVTK-1
B - Flex Sections
PFL-1 (12" Section)
PFL-2 (24" Section)
PFL-3 (36" Section)
PFL-4 (48" Section)
C - Rigid Sections
PEXT-1 (12" m/f Section)
PEXT-2 (24" m/f Section)
PEXT-3 (36" m/f Section)
PEXT-4 (48" m/f Section)
D - Support Ring and
Plate
PSPXT-8
E - Firestop
PS-8
F - Roof Flashing
PRF-7 (1/12 - 7/12 pt.)
PRF-7 (7/12 - 12/12 pt.)
G - Adaptor/Vent
Reducer
PVA5487 (5"/8" to 4"/7")
4’ max.
RHS 8,
4’ vent run or
less, use RHS101
