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Jandy
®
JXi
™
Gas-Fired Pool and Spa Heater | Installation & Operation Manual
NOTE: When pool equipment is located below the
pool surface, Zodiac Pool System LLC is not
responsible for any large scale water loss,
fl ooding or damage caused by a leak.
CAUTION
The pool equipment must be protected from back-siphoning of water. If
there is any chance of back-siphoning, provide a check valve between
the pool and the fi lter pump inlet.
Section 5. Water Connections
Install pool system components with connections as
illustrated in Figure 9. Any confi guration other than
as illustrated in Figure 9 can affect the operation of
the water pressure switch. Locating the heater above
or below the pool water surface can also affect
operation of the water pressure switch.
MAIN DRAINS
(Suction Outlet)
MANUAL BYPASS VALVE
HEATER
FILTER
CHECK VALVE
(Always install a corrosion resistant check
valve when any sanitation equipment,
including erosion feeders and salt
chlorination systems are installed,
see section 5.4
for more details)
PUMP
POOL/SPA
3 WAY VALVE
SPA DRAIN
(Suction Outlet)
SKIMMER
SPA RETURN
POOL
RETURN
a.
a.
MANUAL BY-PASS DETAIL:
USE WHEN FILTRATION RATE
EXCEEDS 100 GPM
Figure 9. Typical Water Piping Confi guration
5.1 Pump Sizing
For ASME heater models JXi400NC, JXi400PC, JXi260NC and JXi260PC please go to “Appendix A. ASME
®
Header” on page 55.
Model Min gpm (lpm) Max gpm (lpm)
JXi 200 30 (114) 100 (379)
JXi 260 30 (114) 100 (379)
JXi 400 30 (114) 100 (379)
Table 4. Recommended Flow Rate Adjustment
All JXi heaters utilize an internal bypass mechanism
and thermal regulator valve (TRV) to accommodate
fl ow rates delivered to the heater from a minimum of
30 gallons per minute (gpm) to a maximum fl ow of
100 gpm.
CAUTION
The system water pump must be capable of providing no less than 30
gpm of fl ow through the heater. Flow rates at less than 30 gpm may
cause nuisance operation causing damage to the heater or causing
the heater to turn off.
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