Specifications

Manifold gas pressure for the Legacy Model
LRZ natural gas heaters should be set at 4" WC.
Propane heaters should be set to 9" WC.
CAUTION
La pression du collecteur de pression pour les
systèmes de chauffage au gaz naturel devrait
être de 4'’ WC. Pour les sytèmes de chauffage au
gaz propane devrait être de 9'’ WC.
ATTENTION
The manifold pressure may be checked by
connecting a manometer to the pressure port on the
outlet side of the valve. The pressure will be zero when
the heater is not running. When the heater is operating
the manifold gas pressure should be 4" WC for natural
gas heaters and 9.0" WC for LP gas heaters.
If the manifold pressure indicated above is not
correct, check the gas train for possible problems.
Check the meter, gas line, gas ttings, and gas shut off
for under sizing. Check the gas valve inlet for excess
pipe dope, if all is correct, then it may be necessary to
adjust the gas valve regulator. To adjust the manifold gas
pressure, rst remove the slotted cap next to the inlet
pressure port on the inlet side of the gas valve. Under the
slotted cap is a slotted plastic screw which increases the
manifold pressure when turned clockwise and decreases
the manifold pressure when turned counterclockwise.
After measurements, and adjustments if necessary, have
been made, make sure to replace the 1/8" NPT gas valve
plugs on the inlet and 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 ring,
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 recommended. Consult the National Fuel
Gas Code (NFPA
®
54 / ANSI
®
Z223.1, latest edition),
the Liqueed 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 re protection authorities about
specic 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
equipment 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
AQUAPURE
®
MANUAL BY-PASS DETAIL
MANUAL BY-PASS IS USED
WHEN FILTRATION RATE
EXCEEDS 125 GPM
Figure 7. Typical Piping Installation
Page 15
ENGLISH
Jandy
®
Legacy™ Model LRZE Pool/Spa Heater by Zodiac
®
|
Installation and Operation Manual