09-02
9
30532 Rev D
NASIM REAR DIRECT VENT DECORATIVE GAS APPLIANCE
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b. A 45° Elbow
For corner venting, a maximum of one 45° elbow
(NAVP45) may be used. The maximum horizontal
run following the elbow is 12 to the base of the
cap. See Figure 9.
c. Two Elbows
Figure 10 shows various venting configurations
using two elbows to terminate horizontally. The
maximum vertical run is 20 and the maximum
horizontal run is 14.
d. Three Elbows
Figure 11 shows various venting configurations
using three elbows to terminate horizontally. A
minimum 1 of vertical vent is required any time
90° elbows are used when rear venting the
appliance. The maximum vertical run is 20 and the
maximum horizontal run is 12.
e. Assembling Chimney Sections
Use only pipe supplied and listed for use with this
appliance. See page 4 for a description of the listed
components. See the directions on page 13 for
assembling vent sections.
Figure 9
One 45° Elbow
Figure 10
Two Elbows
Figure 11
Three Elbows
Starter elbows cannot be used in
any rear venting configuration.
Starter elbows cannot be used in
any rear venting configuration.
Starter elbows cannot be
used in any rear venting
configuration.
f.
Termination
Vent termination must not be recessed in the wall.
Siding may be brought to the edge of the caps base.
Install the cap as shown in Figure 12 . The cap pipe
sections should overlap the vent pipe by 1-1/2.
Caulk the outside edges of the cap.
Local codes may require the installation of a shield
(product #CS) which prevents the cap from
accidentally touching anything or anyone.
Figure 13 illustrates cap locations prescribed by
current ANSI Z273.1 and CAN/CGA-B149
Installation Codes.
Figure 12 - Rear Vent Heat Shield
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