Specifications

pressure switch can be adjusted to accommodate this
effect if the heater water connections are no more than
six feet below the pool water surface and no more than
15 feet above it. See instructions for pressure switch
adjustment (Section 7.7) in the heater start-up section of
this manual 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 ooding. Zodiac Pool Systems, Inc. cannot
be responsible for such water loss or ooding or the
damage caused by either occurrence.
For special installations such as water connections
below the water level of the pool, or for other questions
contact the Zodiac Pool Systems, Inc. Technical Support
Department at [phone].
5.2 Check Valve Installation
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.
WARNING
The heater must be protected from back- siphoning
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 lter pump inlet.
When an automatic chemical feeder is installed
in the plumbing, it must be installed downstream of the
heater, see Section 5.7. A check valve must be installed
between the heater and the chemical feeder to prevent
back-siphoning of chemically saturated water into the
heater where it will damage the components.
5.3 Automatic Flow Control Valve
The inlet/outlet header of the Legacy Model LRZ
electronic heater comes equipped with an automatic
ow control valve. The automatic ow control valve
maintains the proper ow through the heater at rates up
to approximately 125 Gallons Per Minute (GPM) (475
liters per minute [LPM]). If the lter system ow rate is
higher than approximately 125 GPM (475 LPM), install
a manual bypass valve, see Figure 7, then perform a
temperature rise test, see Section 7.8 and adjust the ow
using the bypass valve until the proper temperature rise
is obtained.
5.4 Reversible Water Connections
NOTE Reversing the header requires a longer syphon
tube, order part number R0483601.
The Legacy Model LRZ electronic heater is
shipped with water connections on the right side, but
can be modied in the eld to provide left-side water
connections. This procedure involves removing the heat
exchanger headers and reinstalling them on opposite
ends of the tube assembly. 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 all electrical power, the gas
supply and water supply have been turned off before
starting the procedure. These instructions have been
written to include the steps needed when reversing the
water connections on an existing installation. If you are
reversing the headers on a new installation, some steps
will be ignored. Water connection reversal is illustrated
in Figures 8 and 9.
Proceed as follows:
1. For an existing installation, drain the heater by
removing the two drain plugs on the inlet/outlet
header and the drain plug on the return header.
2. Remove the heater front panel (door).
3. Remove the I/O header side cover plates, top and
bottom. See Figure 10.
Figure 8. Water Connections as Shipped
Figure 9. Water Connections Reversed
NOTE: When reversal
is complete the water
temperature sensor
wires and the syphon
loop tube will exit the
inlet/outlet header at
the back of the heater
and the drain plugs are
facing down.
Bypass
Assembly
Page 16
ENGLISH
Jandy
®
Legacy™ Model LRZE Pool/Spa Heater by Zodiac
®
|
Installation and Operation Manual