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ENGLISH
Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
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Installation and Operation Manual
The manifold pressure may be checked by
connecting a manometer to the pressure port on the
outlet side of the valve. You will need to remove the
1/8" NPT protective plug form the port and install the
appropriate 1/8" NPT fitting to connect your manom-
eter. The pressure will be zero when the heater is not
running. When the heater is operating the manifold gas
pressure should be 4.0" WC for natural gas heaters and
9.0" WC for LP gas heaters.
Before adjusting the manifold gas pressure check
the supply side pressure. Make certain the entire
supply side gas train (gas line, shutoffs, meter, etc.)is
correct for the heater size. To adjust the manifold gas
pressure, first remove the slotted cap on the top of the
gas valve to the right of the control knob. Under the
slotted cap is a slotted plastic screw which increases
the manifold pressure when turned clockwise and
decreases the manifold pressure when turned counter-
clockwise.
After measurements, and adjustments if neces-
sary, have been made, make sure to replace the 1/8"
NPT plug on the manifold pressure ports, and the
cap on the manifold pressure adjustment screw. It
is extremely important to replace these parts before
leaving the installation. Failure to do so can result in
damage to property or injury or death.
With the heater firing
, the pressure must be
within the range shown in Table 5. Also check the
pressure with the heater off.
4.3
Special Precautions for LP Gas
LP Gas is heavier than air and can therefore more
readily collect or “pool” in enclosed areas if provision
for proper ventilation is not made. Installation of pool
heaters in enclosed areas such as pits is not recom-
mended. Consult the National Fuel Gas Code (NFPA
54 / ANSI Z223.1, 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 7 illustrates typical piping for pool equip-
ment in pool/spa combination pools.
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. In
special installations where a shut-off valve, diverter
valve or other variable restriction is required in the
plumbing between the heater outlet and the pool,
Zodiac Pool Systems, Inc. recommends the installation
of a pressure relief valve on the heater. See Section
5.6.
Arrangement of pool system components other
than as illustrated in these diagrams can affect the
operation 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 accom-
modate 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 7.5) in the heater
start-up section of this manual for more information
about this.
AQUAPURE
MANUAL BY-PASS DETAIL
MANUAL BY-PASS IS USED
WHEN FILTRATION RATE
EXCEEDS 125 GPM
Figure 7. typical Piping installation
Summary of Contents for Jandy Legacy LRZ Millivolt
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