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Jandy
®
JXi
™
Gas-Fired Pool and Spa Heater | Installation & Operation Manual
*
Sweep ElbowUnion Nut
Union Nut
Union Tailpiece
Union Tailpiece
Cut Pipe
Cut Pipe
O-Ring
O-Ring
O-Ring
Drain Cap
Top Inlet Manifold Orifice
Side Inlet Manifold Orifice
Manifold Outlet
*NOTE: Glue Union Tailpiece and Union Nut away from heater to prevent
spillage that can affect the VersaFlo gate operation. Remove excess glue.
Figure 12. Inlet Piping
• Align Tailpiece and manifold orifi ce.
• Secure to manifold with union nut hand tight only.
Do not overtighten. Do not use pipe joint or thread
tape.
• If using the sweep elbow. Use approved NSF
adhesive to glue the sweep elbow onto the cut
pipe.
• Repeat the above steps for the manifold outlet.
Again paying special care to ensure proper
seating of the union tailpiece o-ring.
• Install the union nut and drain cap with o-ring at
the unused inlet on the heater manifold. Be sure
that the o-ring is properly seated. Secure hand
tight only. Do not overtighten. Do not use pipe
joint or thread tape.
• Return all valves to their operating positions.
• Restore power to the heater at the breaker.
• Turn on pump and inspect carefully for leaks.
• Restore main gas supply.
• Start the system and check for proper fl ow.
• Return heater to normal operation.
WARNING
To avoid an electrical shock hazard, which can result in serious injury
or death, ensure that all electrical power to the system is turned off
before approaching, inspecting or troubleshooting any leaking valves
or plumbing that may have caused other electrical devices in the
surrounding area to get wet.
Follow all fi lter manufacturer’s instructions. Never
attempt to assemble, dis as sem ble or adjust the
fi lter when there is pressurized air in the system.
Starting the pump while there is any pressurized
air in the system can cause the fi lter lid to be
blown off, which can cause death, serious personal
injury or property dam age.
5.3 Water Pressure Switch Adjustment
The water pressure switch is inside the heater jacket
on the water connection side See Section 1.8, item
“f”.
The switch is preset at the factory. The pressure
switch setting must be adjusted If the heater is
installed:
• Below the surface level of the pool
• More than two feet above the pool level
• Where the pressure is measured at 1 psi or
greater with the fi lter pump off
Location of the heater above or below the pool water
surface can also affect the operation of the switch.
The factory installed switch can accommodate
elevations of 6 feet above the pool water surface
or 11 feet below the pool water surface. If the
heater water connections are outside this range
Consult your local Zodiac
®
representative for
recommendations.
• Set the heater control to “OFF”.
• Remove seven screws securing the side panel to
the heater body.
• Remove the side panel to gain access to the
water pressure switch. See Figure 13.
• Turn the fi lter pump on and confi rm that the
pressure switch closes with a voltmeter.
• If the switch does not close, check that all valves
are open to the heater and that there are no
restrictions in the line. You may also need to
confi rm fl ow rate from your pump as outlined in
Section 5.1.
• Once an operational and correctly sized pressure
switch has been confi rmed, set the heater control
to either POOL or SPA. Heater should start.
• With your fi ngers, turn the adjustment sprocket
very slowly clockwise until the heater goes off.
• Slowly turn the pressure switch adjustment
sprocket counterclockwise one-quarter turn. The
heater should come back on. See Figure 13.
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