LXi
™
Pool/Spa Heater Installation and Operation Manual Page 13
WARNING
Do not store any chemicals, cleaners, or other cor-
rosive material near combustion air openings or in
the room. Avoid locating appliance vents in the vi-
cinity of combustion air openings. Failure to prevent
corrosive materials from mixing with combustion air
can result in reduced heater life and unsafe heater
operation.
AVERTISSEMENT
Ne pas entreposer ni utiliser d'essence ni d'autres
vapeurs ou liquides infl ammables à proximité de cet
appareil ou de tout autre appareil.
3.2 Exhaust Venting
When converted to indoor and outdoor shelter
venting confi guration, the LXi heater has a vent collar
fi tting for attachment to the venting. The diameter of
the vent collar and, thus, the minimum diameter of
the vent pipe to be used is determined by the model
of heater installed and the type of venting. The only
correct procedure for vent pipe sizing is to do so in
accordance with Table 4 and the applicable installa-
tion code as stated in the following "Danger" warn-
ing. Note that with horizontal Category III type vent
installations, the venting may be smaller than the vent
collar for Category I vertical venting. See Table 4.
Table 3. Air Openings to Outside
Exhaust Fans or Vents: Any equipment
which exhausts air from the room where the heater
is installed can deplete the combustion air supply or
reverse the natural draft action of the venting system.
This could cause fl ue products to accumulate in the
room. Additional air must be supplied to compensate
for such exhaust.
The information in Table 3 is not applicable in
installations where exhaust fans or blowers of any type
are used. Such installations must be designed by quali-
fi ed engineers.
The heater must be completely isolated and
protected from any source of corrosive chemical fumes
such as those emitted by trichlorethylene, perchloro-
ethylene, chlorine, etc.
3)
Notes:
1. Use approved
roof jack.
Figure 7. Indoor Installation Venting (USA), or Outdoor Shelter (Canada)
Required Net Free Open Area*
for Combustion Air Openings
*Area indicated is for one of two openings; one at fl oor level and
one at the ceiling, so the total net free area would be double the
fi gures indicated. For special conditions, refer to NFPA54 ANSI
Z223.1. In Canada refer to the National Standard CAN/CSA-
B149.1 which differs from this table.
Note: If using screens and/or metal louvers, compensate by adding
50% additional area to each opening. If using wood louvers each open-
ing must be at least four times the area indicated in the table above.
Model
Direct from outside Duct from outside
in
2
(cm
2
)in
2
(cm
2
)
250 63 (406) 126 (813)
300 75 (484) 150 (968)
400 100 (645) 200 (1290)
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