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ENGLISH
Installation and Operation Manual
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Jandy® Legacy™ Model LRZE Pool/Spa Heater by Zodiac®
table 5. Gas Supply Pressure Requirements
Supply Pressure
Minimum
Maximum
Natural Gas
5.5 inches W.C.
(1.4 kPa)
10.0 inches W.C.
(2.5 kPa)
LP Gas
10.0 inches W.C.
(2.5 kPa)
14.0 inches W.C.
(3.5 kPa)
Manifold Pressure
Nominal
Natural Gas
4.0 inches W.C. (1.0 kPa)
LP Gas
9.0 inches W.C. (2.2 kPa)
note
The maximum inlet gas pressure must not
exceed the specified value. The minimum
value listed is for the purpose of input
adjustment. Refer to Table 5.
8. Before operating the heater, test the complete gas
supply system and all connections for leaks using
a soap solution. Do not use an open flame.
caution
Some leak test solutions (including soap and water)
may cause corrosion or stress cracking. Rinse the
piping with water after testing.
attention
Certaines solutions d’essai d’étanchéité (y compris
l’eau et le savon) peuvent causer de la corrosion
ou de la fissuration. Rincez les tuyaux à l’eau après
l’essai d’étanchéité.
caution
Permanent damage to the gas valve will occur if the
following procedures are not followed.
attention
Vous endommagerez la soupape de gaz si vous ne
respectez pas les procédures suivantes.
3. Use the figures in Table 4 to size the gas inlet
piping from the gas meter to the heater. Check all
local codes for compliance before installing the
heater.
table 4. Supply Gas Pipe Size Requirements*
Distance from Gas Meter
Heater
Size
0-50 feet
(0-15 m)
50-100 feet
(15-30 m)
100-200 feet
(30-60 m)
in.
mm
in.
mm
in.
mm
125
3/4
19
1
25
1
25
175
1
25
1
25
1-1/4
32
250
1
25
1-1/4
32
1-1/4
32
325
1-1/4
32
1-1/4
32
1-1/2
38
400
1-1/4
32
1-1/2
38
1-1/2
38
noteS:
*1. These numbers are for natural gas (0.65 Sp. Gr.) and
are based on 1/2 inch (3.45 kPa) water column pressure
drop. Check supply pressure with a manometer, and local
code requirements for variations.
For LP gas, reduce
pipe diameter by one size, but maintain a minimum
3/4" diameter.
2. Check supply pressure and local code requirements before
proceeding with work.
3. Pipe fittings must be considered when determining gas
pipe sizing.
4. Install a sediment trap (drip leg) ahead of the gas
controls, see Figure 6. Fit the trap with a threaded
cap which can be removed for cleaning.
5. Install a manual gas shutoff valve for service
and safety. Do not use a restrictive gas cock.
DO NOT USE FLEXIBLE GAS PIPING, it will
restrict the gas flow to the heater.
6. Disconnect the heater and its individual shutoff
valve from the gas supply system during pressure
testing of the system at pressures higher than 1/2
pounds per square inch (psi) (3.45 kilopascals
[kPa]). If the test pressure is equal to or less than
1/2 psi (3.45 kPa), close the manual shutoff valve
on the heater during the piping pressure test.
7. If the gas supply pressure is less than required,
check for undersized pipe between the meter and
the heater, a restrictive fitting, or an undersized
gas meter. Gas supply pressures to the heater are
listed in Table 5.
Figure 6. Proper design for a Sediment trap/drip Leg
APPROVED
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