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ENGLISH
Slowly turn adjustment
sprocket clockwise until
heater goes off
Figure 17. Adjust Pressure Switch
6.
Slowly turn the pressure switch adjustment
sprocket counterclockwise one-quarter turn. The
heater should come back on.
7.
Check the adjustment by turning the filter pump
OFF. The burners should shut off immediately.
If they do not, restart the filter pump and repeat
Steps 6 and 7. Check the adjustment again.
8.
Return the pool temperature control to the desired
temperature.
It may be necessary to repeat these steps to get a proper
setting. The switch must be set so that the heater will not
fire unless the pump is running. If a proper setting cannot
be reached, contact the factory service department.
5.5
Check Valve Installation
When any equipment is located below the surface of the
pool or spa, back-siphoning can occur, which is when the
pump stops and a pressure-suction differential is created.
Check valves should be installed in the piping system to
isolate the equipment from the pool or spa if there is any
chance of back-siphoning. Always install a check valve
if there is a chemical feeder installed in the system (see
Section 5.8).
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.
Do not install any shutoff valve in the piping between
the heater outlet and the pool, unless it is being used as a
diverter valve. Always use care when installing chemical
feeders so that there is no back-siphoning of chemical
into the heater, filters, or pump. Make sure the feeder
Jandy
Pro Series, JXi
Gas-Fired Pool & Spa Heater
®
™
outlet line is downstream of the heater and a positive seal
noncorrosive check valve is installed between the feeder
and the heater.
5.6
The JXi heater is shipped with water connections on the
right side, but the top panel can be rotated to adapt to left-
side water connections. This procedure involves turning
the heater and then removing and rotating the top panel of
the heater. The heater wiring procedure must be done only
by a trained service technician.
5.7
A pressure relief valve (PRV) is recommended in all
installations, and is mandatory in any installation in which
the water flow can be restricted between the heater outlet
and the pool/spa.
A pressure relief valve is not supplied with the JXi heater.
However, it is recommended that a pressure relief valve
be installed and may even 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.
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
selecting 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.
®
To install a pressure relief valve:
1.
2.
Drilling through plastic can often cause the drill bit to
'grab', causing the drill motor to twist in your hand.
Hold drill firmly to avoid potential injury.
NOTE: The fittings must be installed immediately after the
3.
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Installation & Operation Manual
Reversing the Water Connections
Pressure Relief Valve Installation
Locate the threaded boss on the outlet port of the
in/out header (beside the "out" arrow). See Figure
18.
Note the dimple at the center of the blind bottom
of the boss. Using the dimple to center the
drill bit, drill a 1/4" diameter hole through the
bottom of the boss, taking care not to damage
he surrounding plastic threads. (TIP: Drilling a
1/8" diameter hole first will help prevent thread
damage.)
WARNING
outlet with no valves or other components inbetween.
The pressure relief valve must be installed at the outlet
port. Do not install at either of the header inlet ports.
Install a brass 3/8 NPT x 3/8 NPT x 3" long pipe
nipple into the boss, using 5 to 6 wraps of Teflon
tape on the threaded end. Do not overtighten. See
Figure 18.
®
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