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INDOOR INSTALLATION
The installation of venting system should conform with
the latest edition of ANSI Z223.1, the National Fuel
Gas Code, and/or in Canada, CAN/CGA-B149.1 or .2
or applicable provision of the local codes.
All products of combustion and vent gases must be
completely removed to the outside atmosphere through
a vent pipe which is connected to the draft hood. A
vent pipe extension of the same size must be
connected to the draft hood and extended at least 2
feet higher than highest point of the roof within a 10
foot horizontal radius, and at least 3 ft. higher than the
point at which it passes through the roof, or as
permitted by local code; see Figure 13. The vent
should terminate with an approved vent cap (weather
cap) for protection against rain or blockage by snow.
Double-wall vent pipe and an approved roof jack shall
be employed through the roof penetration. The use of
double-walled type B vent pipe is recommended.
The draft hood must be installed so as to be in the
same atmospheric pressure zone as the combustion air
inlet to the pool heater. The certified (factory) draft
hood must not be modified in any way and must be
employed in every indoor installation.
The heater must be located as close as practical to a
chimney or gas vent. The Heater should be installed at
least 5 feet away from the pool or spa.
The heater must be placed in a suitable room on a non-
combustible floor and in an area where leakage from
heat exchanger or water connections will not result in
damage to the area adjacent to the heater or the
structure. When such locations cannot be avoided, it is
recommended that a suitable drain pan with adequate
drainage, be installed under the heater. The pan must
not restrict air flow.
Installations in basements, garages, or underground
structures where flammable liquids may be stored must
have the heater elevated 18 inches from the floor using
a noncombustible base. The following minimum
clearances from combustible materials must be
provided.
Side
Water Connection
18 in.
Remaining
6 in.
Ceiling Clearance
*To ceiling or roof.
P/N 471105
Front
Top
24 in.
6 in.
36 in.*
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Installation - Ventilation (contd.)
NOTE
The heater requires two uninterrupted air
supply openings; one for ventilation and one to
supply oxygen for proper gas combustion; see
Figure 14.
Minimum requirements for free air supply openings:
one 12 inches from the ceiling for ventilation and one
12 inches from the floor for combustion air as outlined
in the National Fuel Gas Code, ANSI Z223.1, or Local
Building Codes.
The air supply openings should be sized according to
table 5.
CAUTION
Chemicals should not be stored near the heater
installation. Combustion air can be contaminated by
corrosive chemical fumes which can void the
warranty.
Vent terminated at
least 24 in. above
any object within 10 ft.
Ridge
2 ft. min.
Figure 13.
*Rise
*1" Rise Per Foot
Recommended
Figure 14.
Air Opening Requirements
Air For
Model
Combustion
100 DSI
72 sq. in.
100 MV
72 sq. in.
Table 5.
10 ft.
Vent
Cap
3 ft. min.
Roof
Jack
Chimney
Vent Cap And
Riser Furnished
By Installer
Air Supply
Ventilation
Air Supply
Gas Combustion
Air
Ventilation
72 sq. in.
72 sq. in.
Rev. H 10-16-07
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