Page 16
Jandy
®
JXi
™
Gas-Fired Pool and Spa Heater | Installation & Operation Manual
3.3.5 Exhaust Venting
When the JXi heater is installed indoors or in an
outdoor shelter it can be vented as a Category I or
Category III appliance. In either case, the vent pipe
sizing must be in accordance with the specifications
listed in Table 1.
For cases when the heater is installed outdoors and
there is concern over extreme weather conditions,
we also provide the option of adding Category III
venting per the specifications listed in Table 1.
It is recommended that all venting be engineered by
a licensed mechanical contractor.
• Category I: Appliance operates with a negative
vent static pressure, a vent gas temperature that
avoids excessive condensate production and
will vent vertically terminating at the roof. Venting
materials for Category I must be Type B double
wall vent.
• Category III: Appliance operates with a positive
vent static pressure, a vent gas temperature that
avoids excessive condensate production and can
be vented horizontally terminating at a side wall.
• Do not terminate heater vents near air conditioning
or air supply fans which could pick up exhaust
flue products, such as carbon monoxide and other
hazardous effluent, and return them inside the
building.
• Vent pipe type and material must be carefully
selected and depends on the type of installation.
• Do not locate the vent terminal where exhaust
flue products could strike against building
materials and cause degradation.
• Vent opening should be well away from
landscaping or other obstructions that would
prevent free air flow to and from vent terminal.
• Do not terminate vent under decks, stairs, or car
ports.
• Do not use the appliance to support the vent
pipe.
• Vent piping must be supported with no low spots
or sagging which could allow condensate to
collect.
• Horizontal runs must be sloped upwards away
from the heater to a vent terminal at a minimum of
1/4 in per horizontal foot (2 cm/m). See Figure 4.
• Install the vent pipe so it can expand and contract
freely with temperature changes.
• Do not run the heater vent into a common vent
with any other appliance.
• It is recommended that vent runs over 18 feet
be insulated to reduce condensation and use
a condensate trap in the vent run close to the
heater, especially in cold climate installations.
• When using Category III vent material, it is
acceptable to use a larger diameter pipe size if
needed. ‡
• For heaters installed outdoors where there
is concern over extreme weather conditions,
Category III venting with approved vent
termination cap can be installed as noted in Table
1 and Section 3.3.7 below.‡
WARNING
Vent pipe materials, sizing, and installation must be as required by the National Fuel Gas Code NFPA 54/ANSI
®
Z223.1 or the Canadian Installation
Codes for Gas Appliances CAN/CSA-B149.1. Undersized pipe can result in inadequate venting and oversize pipe can result in vent condensation.
Improper selection of vent pipe material, incorrect sizing of the pipe, and incorrect installation of vent piping can result in release of combustion
products to the indoors. This can cause serious injury or death by Carbon Monoxide poisoning or asphyxiation.
WARNING
Improper installation or maintenance can cause nausea or asphyxiation from carbon monoxide in flue gases which could result in severe injury
or death. For indoor installations, as an added measure of safety, Zodiac Pool Systems LLC strongly recommends installation of suitable carbon
monoxide detectors in the vicinity of this appliance and in any adjacent occupied spaces.
Incorrect design and installation of heater vents and ducts can result in personal injury, damage to property, or death. To avoid such hazards, the
heater must be installed only by a qualified professional service technician.
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