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Page 18
ENGLISH
Jandy
®
LXi
™
Model Pool and Spa Heater by Zodiac
®
|
Installation and Operation Manual
5.2
Check Valve Installation
WARNING
A check valve can interfere with the proper opera-
tion of certain Suction Vacuum Release System
(SVRS) products. To avoid possible entrapment
hazard, serious injury, or death, make sure to re-
view the operation/owners manual of your particular
SVRS product before installing the check valve.
Install a check valve in the plumbing between
the pool inlet and the heater if there is any chance of
back-siphoning.
Do not install any valve in the piping between the
heater outlet and the pool, unless it is being used as a
diverter valve. For special installations, such as water
connections below the water level of the pool, or for
other questions contact the Technical Support
Department at 800.822.7933.
5.3
Automatic Flow Control Valve
The inlet/outlet header of the LXi heater comes
equipped with an automatic flow control valve. The
automatic flow control valve maintains the proper
flow through the heater at rates up to approximately
125 Gallons Per Minute (GPM) (475 liters per minute
[LPM]). If the filter system flow rate is higher than
approximately 125 GPM (475 LPM), install a manual
bypass valve, as shown in Figure 11, then perform a
temperature rise test, see
Section 7.8
and adjust the
flow using the bypass valve until the proper tempera-
ture rise is obtained.
5.4
Reversible Water Connections
The LXi heater is shipped with water connec-
tions on the right side, but can be modified in the field
to provide left-side water connections. This procedure
involves removing the heat exchanger headers and
reinstalling them on opposite ends of the tube assem-
bly. Some of the heater wiring must be disconnected
and re-routed, so this procedure must be done only by
from LP gas cylinders and filling equipment. Consult
the National Fuel Gas Code
®
(NFPA 54/ANSI Z223.1,
latest edition), the Liquefied Petroleum Gas Code
(NFPA 58, latest edition), the Natural Gas and Propane
Installation Code in Canada (CAN/CSA B149.1, latest
edition), and any other local codes and fire protection
authorities about specific installation restrictions in
your area.
For ALL installations the combustion air
openings requirements of Table 3 and NFPA54
/ ANSI Z223.1 MUST be followed for safe and
proper operation.
Section 5. Water Connections
5.1
Water Piping
Figure 10 illustrates typical piping for pool
equipment in pool/spa combination pools. With its
electronic control, the LXi heater is particularly suited
for this type of pool installation.
The heater must be protected from back-siphon-
ing of water, which can result in dry starts. If there is
any chance of back-siphoning, provide a check valve
between the pool and the filter pump inlet.
Arrangement of pool system components other
than as illustrated in these diagrams can affect the op-
eration of the heater’s water pressure switch. Location
of the heater above or below the pool water surface
can also affect operation of the switch. In general, the
pressure switch can be adjusted to accommodate this
effect if the heater water connections are no more than
6 feet (1.8 m) below the pool water surface and no
more than 15 feet (4.6 m) above it. See instructions
for pressure switch adjustment (
Section 7.7
) for more
information about this.
Note that when pool equipment is located below
the pool surface a leak can result in large scale water
loss or flooding. Zodiac Pool Systems, Inc., cannot be
responsible for such water loss or flooding or the dam-
age caused by either occurrence.
AQUAPURE
MANUAL BY-PASS DETAIL
MANUAL BY-PASS IS USED
WHEN FILTRATION RATE
EXCEEDS 125 GPM
Figure 10. Typical Piping Installation