Gas Installation - Napoleon GB20-N Installation And Operation Instructions Manual

Gb20 series vented natural/propane gas fireplace
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6

GAS INSTALLATION

Proceed once the vent installation is complete.
1. Move the fireplace into position and secure using the
nailing tabs and/or secure to the floor through the ¼"ø holes
located at either end of the base.
2. Route a 3/8" N.P.T. black iron gas line, 1/2" type-L
copper tubing or equivalent to the fireplace.
3. For ease of accessibility, an optional remote wall
switch or millivolt thermostat may be installed in a conven-
ient location. Route 2-strand (solid core) millivolt wire
through the electrical hole located at the bottom left side of
the unit. The recommended maximum lead length de-
pends on wire size:
WIRE SIZE
14gauge
16gauge
18gauge
Attach the one lead to terminal 3 (located on the gas valve)
and the other lead to the vent safety switch wire ( located
loose in the valve compartment). See FIGURE 3.
Do not connect either the wall switch, thermo-
stat or gas valve to electricity (110 volts).
FIGURE 5
4. Install rigid black pipe, 1/2" type-L copper tubing or, if
local codes permit, a 3/8" flex connector and shutoff valve
to the gas line and the fireplace gas valve. Seal and tighten
securely. An adapter fitting is required between the gas
valve and the copper tubing or flex connector. DO NOT KINK
FLEXIBLE CONNECTOR. FIGURE 6.
5. Check for gas leaks by brushing on a soap and water
solution.
Do not use open flame.
FIGURE 6
Purge all gas lines with the glass door of the fire-
place open. Assure that a continuous gas flow is
at the burner before closing the door.
FRAMING
It is best to frame
your fireplace after
it is positioned
and the vent sys-
tem is installed.
Use 2x4's and
frame
to
local
building
codes.
FIGURE 7-9.
To install the fireplace face flush with the finished wall,
position the framework to accomodate the thickness of the
finished wall.
WS-415-137 / 05.15.00
MAX. LENGTH
100 feet
60 feet
40 feet
1
2
3
FIGURES 7
FIGURE 8
FIGURE 10
Bend out the four nailing
tabs, attached on either side
of the fireplace and secure to
the 2x4 framing. The tabs will
facilitate the installation of ei-
ther a ½ " or a
3
/
" finished wall
4
thicknesss. The nailing tabs
must not be removed.
Combustible materials may be installed flush with the front
of the fireplace but must not cover any of the black face-
areas of the fireplace. Non-combustible material (brick,
stone or ceramic tile) may protrude in these areas.
It is not necessary to install a hearth extension with this
fireplace system. Objects placed in front of the fireplace
should be kept a minimum of 48" away from the front face.
Combustible mantle clearance can vary according to the
mantle depth. FIGURES 11. Use the graph to help evaluate
the clearance needed.
FIGURES 11
FIGURE 9

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