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Unit Installation with Horizontal
Termination
4" X 6-5/8" VENTING
(Flex Vent Systems)
Minimum Vent Clearances
to Combustibles
* Clearances noted below must be maintained;
except when passing through a wall, ceiling or at the
termination where the use of a irestop or wall thimble
reduces clearance to 1" (25mm).
Horizontal Top*
3" (76mm)*
Horizontal Side
2 " (51mm)
Horizontal Bottom
2" (51mm)
Vertical Vent
2" (51mm)
Below are the recommended framing dimensions
(inside measurements) for the 4" x 6-5/8" rigid
vent terminations - for use with a irestop or wall
thimble.
Recommended Framed Opening
Size
Vent Size
Framing Size
4" x 6 - 5/8"
10" x 10"
1. Locate the unit in the framing, rough in the gas
(preferably on the right side of the unit). Locate
the centerline of the termination and mark wall
accordingly. Cut an square hole in the wall - see
chart (inside dimension).
Note: If installing termination on a siding covered
wall, a vinyl siding standoff or vinyl furring
strips must be used to ensure that the
termination is not recessed into the siding.
a l l
i d e W
O u t s
Furring
Strips
2. Level the ireplace and fasten it to the framing
using nails or screws through the nailing strips.
3. Assemble the vent assembly by applying Mill
Pac to the inner lue collar of the termination and
slipping the inner lex liner over it at least 1-3/8"
(35mm). Fasten with the 3 screws (drilling pilot
holes will make this easier). Apply Mill-Pac to
the outer lex pipe and slip it over the outer lue
collar of the vent terminal at least 1-3/8"(35mm)
and fasten with the 3 screws.
NOTE: Horizontal sections must be sup-
ported at intervals not exceeding
3 feet (0.9 meter). (Flame picture
and performance will be affected
by sags in the liner).
4. Separate the 2 halves of the wall thimble and
securely fasten the one with the tabs to the
outside wall making sure that the tabs are on
top and bottom. Fasten the other thimble half
to the inside wall. The thimble halves slip inside
each other and can be adjusted for 2 x 4 or 2
x 6 walls.
5. Slip the assembled liner and termination as-
sembly through the thimble making sure the
termination cap faces up (there are markings
on the cap indicating which way is up). This will
position the termination cap with proper down
slope for draining water. Fasten the cap to the
outer wall with the 4 supplied screws.
6. Pull the centre inner and outer lex liner out
enough to slip over the lue collars of the ire-
place. (You may wish to cut the liner shorter
to make it more workable.) Do not bend liner
more than 90o. The liners must slip over the
collars a minimum of 1-3/8".
7. Apply Mill Pac over the ireplace inner lue
collar and slip the inner lex liner down over it
and attach with 3 supplied screws.
8. Do the same with the outer lue collar and outer
lex liner.
9. Apply a bead of silicone between the thimble
and termination and around the outer edge of
the terminal at the wall in order to keep the
water out.
IMPORTANT: Do not locate termination hood
where excessive snow or ice buildup may
occur. Be sure to check vent termination
area after snow falls, and clear to prevent
accidental blockage of venting system. When
using snow blowers, make sure snow is not
directed towards vent termination area.
4" (102mm) dia. flue pipe
Screws
(3 per
with spring spacer
connection)
6-7/8" (173mm)
dia. air intake
ASTROCAP
DIMENSIONS (946-523/P)
11"
(294mm)
NOTE: A minimum of 1' (305mm) vertical
off the top of the unit is required before
any horizontal runs can start.
2" x 4" or 2" x 6"
Termination
Cap
Screws
(4 per
connection)
Wall Thimble 2 pieces
(10" (254mm)
Outer Diameter)
NOTE: A minimum of 1' (305mm) vertical
off the top of the unit is required before
any horizontal runs can start.
installation
11"
(294mm)
of hole
C L
City Series |
55
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