Page 22
Jandy
®
JXi
™
Gas-Fired Pool and Spa Heater | Installation & Operation Manual
AT TENTION
Do not use fl exible appliance connectors on any gas connections unless the connector is CSA approved for outdoor installation, and is marked with
the BTUH capacity (which must be equal to or greater than the heater rated input) and the type of gas (Natural or LP). Also, any fl exible connectors,
such as CSST buried underground must be certifi ed for underground installation and meet all applicable codes. Please note, use of fl exible connector
still requires the installation of a sediment trap per NFPA 54. See Figure 8.
• Once proper inlet pressure has been confi rmed,
shut off gas supply.
• Remove manometer, hose and barbed fi tting
from the gas valve.
• Apply joint compound to the NPT plug and
reinstall.
• Before operating the heater, test the gas supply
system and all connections for leaks using a soap
solution. Do not use an open fl ame to test for
leaks.
• Reinstall the
gas valve
access panel.
• Secure the gas
inlet grommet
at heater side
panel.
For ALL installations the combustion air openings
requirements and NFPA54 / ANSI Z223.1 MUST
be followed for safe and proper operation.
4.2 Gas Inlet Pressure
Before operating the heater it is necessary to test the
input gas pressure to ensure that it falls within the
required range as outlined in Table 3.
Inlet Gas
Pressure
NG
(Natural Gas)
LP
(Liquid Propane)
Inches W.C.
MAX 10.5 14
MIN 4 4
• All readings must be made while heater is operating.
• Relying on any reading taken while heater is off may result in poor
performance and diffi culty in operation
.
Table 3. Supply Gas Input Pressure Requirements
Pull gas inlet grommet away from heater body
panel.
Remove one screw and the gas valve access
panel.
Remove 1/8 in NPT plug using a 3/16 in Hex Key.
Install a 1/8 in to 1/16 in barbed adapter.
Connect positive manometer lead to barbed
adapter.
• Inlet gas pressure must be taken while the heater,
and if possible, all other gas burning appliances
supplied by the same gas delivery system, are
operating.
• If the gas supply pressure is less than required,
check for an undersized pipe between the
meter and the heater, a restrictive fi tting, or an
undersized gas meter. If needed contact the local
gas utility company for assistance.
c
d
View With Side Panel Hidden
1/8 in NPT
Plug
1/8 in NPT to 1/16 in
Barbed Adapter
e
Connect Hose to
Positive (+) Manometer Port
Connect Hose to
Barbed Adapter
a
b
Gas Inlet Grommet
Gas Valve Access Panel
Gas Inlet Grommet
ScrewScrew
Gas Valve
Access Panel
4.3 Special Precautions for LP Gas
Under the same environmental conditions, liquid
propane (LP) gas is more dense or heavier than air
and will more readily collect or pool in enclosed
areas if adequate ventilation is not provided. It is not
recommended to install LP gas heaters in enclosed
areas such as pits. Locate heaters a safe distance
from LP gas cylinders and fi lling equipment. Consult
the National Fuel Gas Code (NFPA
®
54/ANSI
®
Z223.1, latest edition), the Liquefi 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 fi re protection authorities about specifi c
installation restrictions in your area.
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