Page 15
ENGLISH
Installation and Operation Manual
|
Jandy® Legacy™ Model LRZM Pool/Spa Heater by Zodiac®
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.
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.
Figure 6. Proper design for a Sediment trap/drip Leg
APPROVED
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.
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.
4.2
Manifold Pressure
Confirm that gas supply pressure is correct. 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, when it is operating, are
listed in Table 5.
cautioN
Manifold gas pressure for the Legacy natural gas
heaters should be set at
4.0"
WC. Propane heaters
should be set to 9" WC.
atteNtioN
La pression du collecteur de pression pour les
systèmes de chauffage au gaz naturel devrait être
de 4.0'’ WC. Pour les sytèmes de chauffage au gaz
propane devrait être de 9'’ WC.
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.
(2.5kPa)
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)
table 5. Gas Supply Pressure Requirements
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
300
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.
Содержание Jandy Legacy LRZ Millivolt
Страница 2: ......
