Model LJ Pool and Spa Heater
Page 11
4.2. Special Precautions for Propane Gas
Liquefied petroleum (LP) gas is heavier than air.
Therefore, do not install pool heaters using LP gas in
pits or locations where gas might collect. Locate
heaters a safe distance from LP gas storage and filling
equipment. Consult local codes and fire protection
authorities about specific installation restrictions.
SECTION 5.
Water Connections
5.1 Water Piping
Figure 6 illustrates typical piping for pool equip-
ment in pool/spa combination pools.
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 filter pump inlet.
Arrangement of pool system components other
than as illustrated in these diagrams can affect the
operation of the heaters 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 connec-
tions 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
7.2) 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 flooding. Water Pik Technologies cannot be
responsible for such water loss or flooding or the
damage caused by either occurrence.
5.2 Check Valve Installation
For normal installations, do not install a shutoff
valve or any kind of variable restriction in the water
piping between the heater outlet and the pool/spa.
Install a check valve if there is any chance of
back-siphoning when the pump stops. Do not install any
other 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 Jandy Technical Service department at
(707) 776-8200 ext. 260.
5.3 Automatic Flow Control Valve
The inlet/outlet header of the Lite2 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 (see Figure 6), then perform a tempera-
ture rise test (see Section 7.7) and adjust the flow
using the bypass valve until the proper temperature
rise is obtained.
5.4 Reversible Water Connections
Water Pik Technologies ships the Lite2 heater
with the water connections on the right side. The Lite2
heater can be installed with the water connections on
either side. It could be necessary, or helpful, to switch
the connections to the left side to improve access for
installation and service. Perform this modification
before installing the heater using the following proce-
dures:
1.
Remove heater door.
2.
Remove all 8 hex-head screws fastening the top
and lift the top assembly straight up (see Figure
7).
Figure 7. Heat exchanger reversal.
