Section 5. Water Connections; Water Piping; Check Valve Installation; Automatic Flow Control Valve - Jandy LXi Installation And Operation Manual

Page 18

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 fi lter 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
six (6) feet below the pool water surface and no more
than 15 feet 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 fl ooding. Jandy Pool Products, Inc., cannot be
responsible for such water loss or fl ooding or the dam-
age caused by either occurrence.
5.2

Check Valve Installation

Install a check valve in the plumbing between
the pool inlet and the heater if there is any chance of
back-siphoning.
Figure 10. Typical Piping Installation
LXi Pool/Spa Heater Installation and Operation Manual
™
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 Service depart-
ment at 1.707.776.8200 ext. 260.
5.3

Automatic Flow Control Valve

The inlet/outlet header of the LXi heater comes
equipped with an automatic fl ow control valve. The
automatic fl ow control valve maintains the proper
fl ow through the heater at rates up to approximately
125 Gallons Per Minute (GPM) (475 liters per minute
[LPM]). If the fi lter system fl ow rate is higher than
approximately 125 GPM (475 LPM), install a manual
bypass valve (see Figure 11), then perform a tempera-
ture rise test (see Section 7.8) and adjust the fl ow using
the bypass valve until the proper temperature rise is
obtained.
5.4

Reversible Water Connections

The LXi heater is shipped with water connec-
tions on the right side, but can be modifi ed in the fi eld
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
a trained service technician. Heat exchanger reversals
are generally done before the installation of power
and water to the heater. If you need to reverse the heat
exchanger on a previously installed heater be sure that
AQUAPURE