System (Flex); Installation Procedures - Masport P121-NG Owners & Installation Manual

INSTALLATION
INSTALLATION
PROCEDURES
for Masport AstroCap
Flue System (Flex)
1) Locate the unit in the framing, rough in the
gas. Locate the centerline of the termina-
tion and mark wall accordingly. Cut a
10"(254mm) hole in the wall (inside dimen-
sion).
Note: A 1-1/2"(38mm) clearance around
the liner must be maintained ex-
cept that only a 1" (25mm) clear-
ance is needed at the termination
end. We recommend framing a
10"(254mm) x 10"(254mm) (inside
dimensions) hole to give struc-
tural rigidity for mounting the ter-
mination.
Note: To make the
installation more
aesthetically pleas-
ing, we recom-
mend framing out a
square to mount
the terminal to.
Note: If installing termination on a sid-
ing covered wall,
must be used to ensure that the
termination is not recessed into
the siding.
2) Level the fireplace and fasten it to the
framing using nails or screws through the
nailing strips.
3) Assemble the flue assembly by applying
Mill Pac to the 4"(100mm) inner collar of the
termination and slipping the 4"(100mm)
liner over it at least 1-3/8" (35mm). Fasten
with the 3 screws (drilling pilot holes will
make this easier). Apply Mill Pac or high
temperature silicone to the 6-7/8"(175mm)
flex pipe and slip it over the 6-7/8" outer
collar of the flue 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).
20
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
TM Direct
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. The liners
must slip over the collars a minimum
of 1-3/8".
5) Slip the assembled liner and termination
assembly through the thimble making sure
the termination cap faces up (there are
markings on the cap that show 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 4"(100mm) liner and outer
6-7/8"(175mm) liner out enough to slip over
the flue collars of the fireplace. (You may
wish to cut the liner shorter to make it more
workable.) Do not bend liner more than 45
7) Apply Mill Pac over the fireplace inner collar
and slip the 4"(100mm) liner down over it
and attach with 3 supplied screws.
8) Do the same with the 6-7/8"(175mm) liner.
9) Apply a bead of silicone between the thim-
ble and termination and around the outer
edge of the terminal at the wall in order to
keep the water out.
furring strips
Masport P121/P121LC/P121RC/P131 Zero Clearance Room Sealed Gas Fireplace
IMPORTANT: Do not locate termination
hood where excessive snow or ice build-
up may occur. Be sure to check flue termi-
nation area after snow falls, and clear to
prevent accidental blockage of flueing
system. When using snow blowers, make
sure snow is not directed towards flue
termination area.
o
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