Vertical (Through The Roof) Vent Assembly; Venting System Assembly - Natural Vent - Century Jefferson Homeowner's Installation And Operating Manual

Wall Screws
and Anchors
Snorkel
Termination
Cap
4" Clearance
Gravel
Drain
Window
Well
Fig. 28 Snorkel kit installation.
Recessed Wall
Sheet Metal
Screws and
Bracket
Wall Screws
and Anchors
Waterproof Seal
Around Pipe
ST219
Fig. 29 Use extension brackets to mount snorkel against
recessed wall.
Vertical (Through the Roof)
Vent Assembly
ST219
snorkel detail
Note that all vertically terminated installations
must, where specified, use the restrictor plate to
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comply with Vertical Termination Window (Page 9,
Figure 8), included in the hardware bag.
Make certain the vent system conforms to all other
requirements for vertical termination as specified on
Page 9.
This installation will require you to first determine the
roof pitch and use the appropriate vent components.
Refer to Figures 8 and 9 on Pages 9 and 10.
1. Locate the final position of the stove, observing all
clearances for both the vent and the stove.
2. Plumb to the center of the inner (4") flue collar from
the ceiling above, and mark that location.
30004177
Waterproof Seal
Around PIpe
Firestop
ST218
ST218
install snorkel
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Firestop
Finishing
Collar
7" Pipe
Wall Plate
Jefferson Direct Vent /Natural Vent Gas Heater
3. Cut the opening:
CFM System: 9³⁄₈" x 9³⁄₈" (240 x 240 mm)
DuraVent System: 10" x 10" (254 x 254 mm)
4. Plumb any additional opening through the roof or
other construction that may be needed. In all cases,
the opening must provide a minimum of 1" (25 mm)
clearance to the vent pipe.
5. Place the stove in its final position.
6. Install firestop(s) #7DVFS and Attic Insulation Shield
#7DVAIS as needed. (Fig. 30) If there is a room
above ceiling level, a firestop must be installed on
both the bottom and top sides of the ceiling joists.
If an attic is above ceiling level, an attic insulation
shield must be installed.
Use Four
8d Nails
ST222
Fig. 30 Install firestops and attic insulation shield.
7. Install the appropriate roof support and flashing,
making certain that the upper flange of the flashing
ST222
vent thru ceiling
base is below the shingles. (Fig. 31)
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8. Install appropriate pipe sections until the vent run
reaches above the flashing. The enlarged ends of
the vent sections always face downward.
9. Install the storm collar and seal around the joints.
(Fig. 31)
10. Add additional vent lengths to achieve the proper
overall height.
11. Apply cement to the inner and outer termination col-
lars and install the terminal cap.

Venting System Assembly - Natural Vent

General Information
The Jefferson Heater is shipped from the factory as a
Direct Vent Heater. It may be converted to a Natural
Vent heater by installing the CFM Corporation Model
Z31D00 FSDHAG Draft Hood Adapter.
The Jefferson Heater is approved for installation as a
Natural Vent unit. CFM Direct Vent outer pipe (7FSSK)
could be used directly after the Draft Hood Adapter
#7DVAIS
Attic Insulation
Shield
#7DVFS
Firestop in
Upper Floor
#7DVFS
Firestop in
Ceiling
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