Page 14
ENGLISH
Zodiac
®
JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
4.2
Inlet Gas Pressure Test
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 2.
INLET GAS
PRESSURE
NG
(NATURAL GAS)
LP
(LIQUID PROPANE)
KPA
INCHES
W.C.
KPA
INCHES
W.C.
MAX
2.6
10.5
3.5
14
MIN
1.13
4.5
1.13
4.5
•
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 2.
Supply Gas Input Pressure Requirements
•
Verify the manual gas shutoff valve is open.
•
Remove the heater rear panel to expose the gas valve.
NOTE:
The rear panel is the main body panel closest to the gas
inlet. This may appear to be the front panel if the user interface was
moved to accommodate a left side water connection. For instruc-
tions on moving the user interface see
5.2.1
.
a
Locate the inlet pressure tap on the gas valve.
b
Using a small flathead screwdriver (ideally .100"
width or smaller), turn the tap plug 2-3 turns counter
clockwise.
CAUTION
Do not back the tap screw entirely out of the inlet pressure tap. The
screw is small and easily lost. A lost screw needs to be replaced
before the heater can operated.
c
Connect positive manometer lead to the inlet
pressure tap.
• 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 fitting, or an undersized gas
meter. If needed contact the local gas utility company
for assistance.
•
Once proper inlet pressure has been confirmed, shut
off gas supply.
•
Remove manometer.
• Tighten the tap plug securely. DO NOT
OVERTIGHTEN.
WARNING
Failure to secure or replace the pressure tap plugs will allow gas to
leak from the valve into the heater body which could result in prop-
erty damage, severe injury, or death.
• Before operating the heater, test the gas supply
system and all connections for leaks using a soap
solution.
Do not use an open flame to test for leaks.
a
b
c
INLET ELBOW
INLET ELBOW
OUTLET ELBOW
INLET PRESSURE TAP
MANOMETER HOSE
(FROM POSITIVE PORT)
INLET PRESSURE TAP
a
