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UVSRCA Vent-Free Fireboxes
5"
B
A
Front View
A
UVSRC36A
39¹⁄₄"
UVSRC42A
45¹⁄₄"
Fig. 4 Framing dimensions.
Fig. 5 Secure firebox.
Step 5: Gas Piping and Connection
FP1532
The gas piping must be installed in accordance with
Vent free
local codes or, in the absence of local codes, in accor-
nailing flanges
dance with the National Fuel Gas Code, ANSI Z223.1/
10/04
NFPA 54, latest edition.
6
D
1/2"
C
A
1/2" Clearance
not Required at
This Point
B
Side View
T226
B
C
D
T226
framing dimensions
44¹⁄₄"
21"
22"
2/04
44¹⁄₄"
22"
32"
Nailing
Flanges
FP1532
Noncombustible Insula-
tion
1"
Min.
Fireplace
Outer Wrap
Fig. 6 Gas line installation.
The normal gas connection is 1/2" NPT, made at the left
T227
side facing the unit. If a right side connection is desired,
gas line install
the connecting pipe must be led at the rear of the fire-
2/04
place to terminate at the left hand side for connection to
the fireplace.
Piping should be tested for leaks prior to final wall
installation. Test for leaks using soap and water solution
after completing the connection. DO NOT USE OPEN
FLAME.
Step 6: Optional Procedure For Cold Climate Instal-
lations
The insulation and sealing of the enclosure around the
fireplace is very important in cold climates. If the en-
closure is insulated and sealed properly, you can avoid
future cold air problems. The time taken to install the
firebox correctly is well worthwhile. The following steps
are to stop potential cold air problems.
Insulation of the Fireplace Enclosure
When in a chase or an outside wall, the fireplace en-
closure should be insulated like any other wall of your
home. Insulation should be installed on the outside
wall(s) and the wall above the fireplace.
Insulate to Seal Under the Fireplace
Insulating under the fireplace is beneficial for installa-
tions on a concrete slab. The fireplace should be placed
on insulating board. It is important that a hard, rigid
surface be maintained, so do not use fiberglass insula-
tion for this purpose.
CAUTION: WHEN INSTALLING A FIREPLACE IN AN
INSULATED ENCLOSURE, BE SURE TO MAINTAIN
ALL MARKED AIR SPACES.
Seal Seams
Seal the seams of the fireplace where the outer wall
meets the bottom pan and the front face. Also seal
between the fireplace and finishing materials. Use high
temperature caulk. Refer to Figure 7 for details of seal-
ing spaces between the fireplace and finishing materi-
als. Note the small amount of insulation installed across
the top of the fireplace and down the sides as a backing
for the caulk.
Side Refractory
Refractory Cement
1/2" Gas Pipe
T227
20007435