Page 27
Jandy
®
JXi
™
Gas-Fired Pool and Spa Heater | Installation & Operation Manual
Pressure
Switch
Rotate clockwise with fingers until
heater turns off. Then rotate
couterclockwise 1/4 turn to set.
Leads
Adjustment
Sprocket
Figure 13. Water Pressure Switch Adjustment
• Check the adjustment by turning the fi lter pump
OFF. The burner should shut off immediately.
If it does not, restart the fi lter pump and repeat
the preceding step. Check the adjustment again.
If you are still unable to successfully set your
water pressure switch please contact your local
Jandy distributor or call technical support at
800.822.7933. Additional information can be
found at www.jandy.com.
• Return the temperature control to the desired
temperature.
CAUTION
The water pressure switch should be adjusted to turn the heater off
when the pump is off. Setting the switch to close at too low fl ow can
damage the appliance. Adjust the switch to turn the heater off, not on.
NOTE: It is recommended that a Pressure Release Valve
(PRV) be installed prior to taking any of the steps
below. Please see Section 5.5 for details.
5.4 Check Valve Installation
When any equipment is located below the surface
of the pool or spa, back-siphoning can occur, which
can draw water backwards through the circulation
system. This can be particularly concerning if
chemically treated water is allowed to fl ow back into
equipment such as heaters, fi lters and pumps. Make
sure any chemical feeder or chlorination system
outlet lines are downstream of the heater and a
positive seal noncorrosive check valve is installed
between the sanitation equipment and the heater.
Always install a check valve if there is sanitation
equipment installed in the system. Do not install any
shutoff valve in the piping between the heater outlet
and the pool.
WARNING
A check valve can interfere with the proper operation of certain
Suction Vacuum Release System (SVRS) products. To avoid possible
entrapment hazard, serious injury, or death, make sure to review the
operation/owners manual of your particular SVRS product before
installing the check valve.
5.5 Pressure Relief Valve Installation
A pressure relief valve (PRV) is recommended in all
installations, and is mandatory in any installation
in which the water fl ow can be restricted between
the heater outlet and the pool/spa. A pressure relief
valve may also be required by local codes. Be sure
to check any applicable installation codes in your
area to determine whether a pressure relief valve is
required.
A pressure relief valve is not supplied with the JXi
heater. However, Jandy does offer a PRV Kit #
R0336101. The following instructions are for use
with this kit only. All other equipment installations
need to be in accordance with the manufacturers
instructions.
The maximum working pressure of this heater is 50
psi. Be sure to take into consideration the maximum
allowable pressure of the other components in the
system when installing a PRV. Any pressure relief
valve installed must comply with provisions of the
standard described in ANSI
®
Z21.22 for the United
Sates or CSA 4.4 in Canada.
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