Page 13
ENGLISH
Jandy
®
, JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
Figure 5. Vent and combustion air terminals at
exterior wall.
7 in min.
12 in min.to
maximum snow level
Grade level
or normal
snow
18 in min.
60 in max
6 in min.
Vent Exhaust
Pipe
Special insect screens installed
(See Figure 7)
Combustion
Air Pipe
Plumbing vent
roof boot
A=Maximum snow accumulation level plus 12 in
Combustion
Air Pipe
Elbow
Insect Screens
Installed
(See Figure 7)
Vent
Exhaust
Pipe
A
A
18 in min.
60 in max
Figure 6. Vent and combustion air terminals at roof.
Figure 7. Installation of insect screens.
Install special
insect screen
at end of pipe
inside coupling
or elbow. Cut
to size as nec-
essary.
Combustion
Air Pipe
Elbow
Vent
Exhaust
Pipe
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.
Connect the combustion air pipe to collar of the air lter box.
For this combustion air pipe only, sheet metal pipe is most
convenient and can be screwed directly to the collar. Seal the
joint with silicone sealer or similar mastic material.
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 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.
Both combustion air and vent piping joints must be sealed.
Metal combustion air pipe joints should be fastened with
screws and sealed with permanent sealer or tape. Plastic vent
pipe joints must be made with solvent cement listed for such
use. Joints in 29-4C
®
stainless steel pipe must be sealed in
accordance with its listing. Connection of combustion air
and vent piping to the heater should be serviceable — i.e.
removable for heater service.
4.3.4 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 specications listed in Table 1.
• 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
ue products, such as carbon monoxide and other
hazardous efuent, 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 ue
products could strike against building materials and
cause degradation.
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