Astria.us.com
126753-01M
8
PRE-INSTALLATION PREPARATION
Continued
Figure 7 - Rough Opening for Installing in Wall
B
C
A
Mission36TMN
(F0859, F0861)
Mission42TMN
(F0865, F0867)
A
40
3
/
8
" (102 cm)
44
3
/
8
" (112 cm)
B
21
3
/
8
" (54.3 cm)
23
1
/
8
" (58.7 cm)
C
41
1
/
4
" (104.8 cm)
48
1
/
4
" (122.6 cm)
Figure 8 - Corner Installation Guidelines
Mission36TMN
(F0859, F0861)
Mission42TMN
(F0865, F0867)
A
24
1
/
2
" (62.2 cm)
27
9
/
16
" (70 cm)
B
73
7
/
8
" (187.6 cm)
83
7
/
8
" (213 cm)
C
52
3
/
16
" (132.6 cm)
59
5
/
16
" (150.6 cm)
D
17
1
/
4
" (43.8 cm)
19
1
/
2
" (49.5 cm)
A
B
C
D
These Dimensions Allow for a 3/4" Clearance
at Sides and Back of Fireplace. However, 0"
Clearance is Permitted.
3/4" Clearance Not Required
at Nailing Flanges
Figure 9 - Installing Transition Pipe and Starter Collar
B-Vent Piping
Transition Pipe
Starter Collar
Vent Collar
FRAMING
1. Frame appliance enclosure as illustrated in
Figures 7 and 8
.
NOTE:
If a wall covering is used to line the enclosure, then all mea-
surements must be from the surface of the covering.
2. Place the appliance into the framing and secure it.
NOTE:
If appliance is to be raised above floor level, a platform must
be built to support the appliance.
3. Install the supply line to the appliance using a 1/2" NPT black iron
gas line terminating 2-5/16" above the bottom of the appliance. The
gas line must be installed through the lower left side access point or
alternate access hole in the bottom of the appliance
(see
Figure 16,
Page 12
).
4. Repack insulation around the gas line to cover any remaining open-
ings in the conduit sleeve. Prepare the incoming gas line with teflon
tape or pipe joint compound and hook-up incoming gas line to the
flexible gas line.
NOTE:
If 1/2" NPT black iron pipe does not mate with fitting at the
end of flexible gas line, remove fitting and replace with a 37° flare
3/4"-12, 1/2" NPT (female) fitting.
WARNING: When finishing appliance, do not over-
lap combustible material onto the black front face.
Brick, tile or other noncombustible materials may be
applied to the face provided that any gap is between
the material used and the face is caulked with a non-
combustible caulking.
INSTALLING TRANSITION PIPE AND STARTER COLLAR
The transition pipe and starter collar shown in
Figure 9
are supplied
with the fireplace, unattached and ready for installation. Remove starter
collar and set aside. Slide transition pipe over vent collar and attach
with a minimum of three screws. Replace starter collar over transition
pipe and attach using four screws located on leg stands (five used
on 42" models). To install B-vent piping, slide the first piece of B-vent
over transition pipe and attach with either a minimum of two screws
or other means approved by the vent manufacturer.
