Page 23
ENGLISH
Jandy
®
, JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
• Once an operational and correctly sized pressure
switch has been conrmed, set the heater control to
either POOL or SPA. Heater should start.
• With your 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 14.
• Check the adjustment by turning the lter pump
OFF. The burner should shut off immediately. If
it does not, restart the 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.
6.4 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 ow back into equipment such as heaters, 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 Suc-
tion 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.
6.5 Pressure Relief Valve Installation
A pressure relief valve (PRV) is recommended in all
installations, and is mandatory in any installation in
which the water 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.
6.5.1 Install Pressure Relief Valve Kit # R0336101
For ASME heater models JXi400NC, JXi400PC, JXi260NC and JXi260PC please go to “Appendix A. ASME® Header” on page 49.
Early models of JXi heaters utilized a different header
design that currently used in production, so this heater
may have one of two different header design. See
Figure 15 below to identify which header design you
have. The header type installed on your JXi heater will
determine which parts form this kit are used. Please
double check that you have all necessary parts to
complete the installation and that all parts are damage
free. If any parts are missing or damaged please call
1-800-822-7933 for assistance.
12345
6
ITEM DESCRIPTION
HEADER TYPE
A B
1
Pressure Relief Valve 3/4 in X 3/4 in 50 PSI X X
2
Brass Nipple 3/8 in X
3
Reducer Bushing 3/8 in M to 3/4 in F NPT X
4
Brass Nipple 3/8 in X
5
Elbow 90° 3/4 in NPT Brass X X
6
PTFE(Teon
®
) Tape X X
Table 5. Pressure Relief Valve Kit components/Usage
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