Vermont Casting H33BDVRRN - Manual (Page 16)

16
Pyromaster
©
H33BDVRRN/P
10004798
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel.
Fasten brackets to wall first, then secure to snorkel
with self drilling #8 x 1/2 sheet metal screws. It will be
necessary to extend vent pipes out as far as protruding
wall face. (Fig. 28)
This Gas Fireplace has been approved for:
a. Vertical installations up to 40’ (12m) in height. Up to
10’ (3048mm) horizontal vent run can be installed
within the vent system using a maximum of three
90
°
elbows.
Vertical Through-the-Roof Applications
Snorkel
Wall Screws
Foundation Recess
Watertight Seal
Around Pipe
Sheet Metal
Screws
Recess Brackets
CFM139
Fig. 28 Snorkel installation, recessed foundation.
b. Up to two 45
°
elbows may be used within the
horizontal run. For each 45
°
elbow used on the
horizontal level the maximum horizontal length must
be reduced by 18” (457mm).
Example: Maximum horizontal length
0 x 45
°
elbows = 10’ (3048mm)
1 x 45
°
elbows = 8
¹⁄₂
’ (2590mm)
2 x 45
°
elbows = 7’ (2133mm)
c. A minimum of an 8’ vertical rise.
d. Two sets of 45
°
elbows offsets within these vertical
installations. From 0 to a maximum of 8’ (2438 mm)
of vent pipe can be used between elbows. (Fig. 30)
e. 7DVCS must be used to support offsets. (Fig. 32)
This application will require that you first determine
the roof pitch and use the appropriate 7DVSKV (A,
B or F). (Refer to Venting Components List, pages
18, 19)
Vertical Through-the-Roof Installation
1. Locate your fireplace.
2. Plumb to center of the (4”) flue collar from ceiling
above and mark position.
3. Cut opening equal to 9
³⁄₈
” x 9
³⁄₈
” (240 mm x 240 mm).
4. Proceed to plumb for additional openings through
the roof. In all cases, the opening must provide a
minimum of 1 inch clearance to the vent pipe,
i.e.,the hole must be at least 9
³⁄₈ ” x 9 ³⁄₈ ” (240 mm x
240 mm).
5. Place fireplace into position.
Max.
8 Feet
(2438mm)
Max.
8 Feet
(2438mm)
40 Feet
(12.2m)
CFM140
Fig. 30 Typical straight-up installation.
45
°
45 °
Maximum
10ft.
(3048mm)
Minimum
8ft. /
Maximum
40 ft. Vertical
Rise
CFM148
Fig. 29 Vertical through-the-roof application.
Pipe Straps
Every 3’
(914mm)