Jandy JXi 200 Installation And Operation Manual page 15

Jandy JXi Gas-Fired Pool and Spa Heater | Installation & Operation Manual
® ™
• Locate the vent terminal so that it will not be
damaged by pedestrians and other traffi c, and so
that the discharge is not offensive. The National
Fuel Gas Code requires a through-wall vent
terminal be at least 7 feet (2.13 m) above grade if
located at a public walkway.
• Locate the vent terminal so the vent exhaust does
not settle on building surfaces and other nearby
objects. Vent products may corrode such surfaces
or objects.
• Locate the vent terminal at a suffi cient horizontal
distance from any gas or electric metering,
regulating or relief equipment. In the United
States, this distance must be at least 4 feet (1.22
m). In Canada, it must be at least 10 feet (3.05 m).
• Locate the vent terminal at a suffi cient horizontal
distance from any building opening. Take special
care to assure that combustion products do
not enter a building through windows, doors,
ventilation inlets, etc. In the United States, this
distance must be at least 4 feet (1.21 m). In
Canada, it must be at least 10 feet (3.04 m).
As shown in Figure 5 and Figure 6, the combustion
air intake and the vent outlet must be installed no
closer together than 18 in (45.7cm) and no farther
apart than 60 in (1.5m). The combustion air inlet
opening must face downward to prevent entry of rain
or snow. The vent outlet must discharge away from
the combustion air inlet - normally in a horizontal
direction when on a wall and vertically upward
when on a roof. Both should terminate at least 12
in (30.5cm) above the snow accumulation level. In
locations with freezing climate, extension of the vent
pipe outside of the building should be minimized.
Vent Exhaust
Combustion
Air Pipe
7" min
Figure 5. Vent and combustion air terminals at
exterior wall
Vent
Pipe
Termination
Cap
6" min
H O T
Grade level
or normal snow
12" min. to maximum
snow level
Connect the vent pipe to the heater vent collar
with an air-tight corrosion-resistant clamp. The
connection must not allow leakage of combustion
products into the space but should be removable for
service.
Install vent piping with a continuous rise of at least
1/4 in per foot (20 mm per meter) away from the
heater. This will assure that any condensate forming
in the vent pipe will fl ow back to the heater where it
can be disposed of properly.
Support vent piping with suitable hangers so its
weight does not bear on the heater or building
penetration and so that piping joints are not strained.
Support horizontal runs at intervals no greater than
6 feet (1.82 meters), and closer if necessary to avoid
sagging. Sagging can trap condensate water and
block the vent.
NOTE: Both combustion air and vent piping joints
must be sealed appropriately. Connection of
combustion air and vent piping to the heater
should be serviceable - i.e. removable for heater
service.
Vent Termination Cap
Elbow
Combustion
Air Pipe
A = Maximum snow accumulation level + 12"
Figure 6. Vent and combustion air terminals at roof
Vent Exhaust
Pipe
18" min
60" max
A
A
Plumbing Vent
Roof Boot
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