Jefferson direct vent/natural vent gas heater, Install the vent adapter pipe – Century Jefferson User Manual
Page 16

16
16
Jefferson Direct Vent/Natural Vent Gas Heater
30004177
4. Attach the Inner Vent Assembly to the stove.
• Run a bead of sealant around the bottom end of 
the starter pipe and attach the assembly to the stove 
using three 1/4-20 x 3/8” Phillips screws provided in 
the parts bag. (Fig. 18)
CEMENT
ST211
attach inner pipe
to next section
12/4/99 djt
First Section of
Vent Pipe
1/4”-20 x 1/2”
Phillips Screw
4” Inner
Starter
Pipe
ST211
Fig. 17  Connect the inner starter with the next section of 
inner vent pipe.
ST212
attach inner assy
12/4/99 djt
CEMENT
ST212
Fig. 18 Attach inner assembly to flue collar.
5. Install the Outer Adapter Pipe. Insert the pipe
over the stove flue collar, keeping the vertical seam 
oriented to the back of the stove. Also, be sure to 
align holes on the pipe with the holes on the flue 
collar of the firebox. Fasten the pipe to the holes in 
the flue collar with the #12 x 1/2” sheet metal screws 
provided. (Fig. 19)
ST213
install outer adpater
12/6/99 djt
ST213
Fig. 19 Fasten outer pipe with #12 x 1/2” sheet metal screws.
Install the Vent Adapter Pipe
(Simpson Dura-Vent Components)
1. Install the Restrictor Plate. Consult the “Vertical
Terminations” on Page 9 to determine whether the 
restrictor plate is needed. If so, put the restrictor 
plate in place within the inner flue collar as shown in 
Figure 16.
2. Discard the inner starter pipe shipped with the log-
set. Using the starter pipe assembly listed on Page 
13, slide the inner section out to allow access.
• Run a bead of sealant around the bottom end of
the starter pipe and attach the assembly to the stove 
using three 1/4-20 x 3/8” Phillips screws provided in 
the parts bag. (Fig. 20)
3. Install the Outer Adapter Pipe. Apply a 1/4” bead
of cement around the outside surface, about one 
inch from the crimped end. (Fig. 21) Orient the verti-
cal seam to the rear, and insert the crimped end of 
the outer pipe into the flue collar. Fasten with three 
(3) sheet metal screws provided.
ST355
dura vent
attach inner assy
4/7/00 djt
CEMENT
Inner Adapter Pipe
1/4-20 x
3/8” Phillips
Screws
ST355
Fig. 20 Simpson Dura-Vent - install inner adapter pipe.
