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ENGLISH
Zodiac
®
JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
1.7
Certifi cation Codes and Standards
CERTIFIED
IAPMO R&T Oceana
COMPLIANT
Standard for ‘Gas Pool Heaters’, AS 4560
APPLICABLE NATIONAL INSTALLATION
AND COMMISSIONING CODE(S)
Standard for Gas Installations, AS/NZS 5601
Pay particular attention to the chapter addressing Venting of Equipment
All Zodiac Gas heaters must be installed in accordance with the local building and installation codes as per the utility or Authority Having
Jurisdiction (AHJ). In the absence of local codes, please refer to the latest edition of the national codes for installation:
JXi pool and spa heaters meet or exceed the requirements of energy conservation regulations such as those in regions that have disallowed the
use of continuously lit pilot type ignition sources.
1.8
Heater Components
Header
d
e
Front
Rear
a
j
Monitors temperature at the exhaust flue. If
excessive temperatures are detected,
combustion will stop and a fault will be displayed.
Flue Temperature Sensor
a
Indicates a safety control equipped to protect internal
components and extend the life of the heater.
b
c
f
g
h
i
Controls gas flow into the burner. Enables flow when the
temperature control calls for heat and all safety controls enable
operation. It also regulates gas pressure to -.05 kPa (-2” Water Column)
below the air pressure at the blower inlet. Necessary pressure regulation
cannot be accomplished with common (positive pressure) gas valves.
Gas Valve
g
When current is passed through the ceramic
material of the igniter it will achieve temperatures
great enough to initiate combustion of the air/fuel mixture.
Hot Surface Igniter
b
Provides energy for ignition, monitors flame quality
and controls the gas valve. Upon call for heat, the
blower is activated to purge the combustion chamber. Electrical power is
then applied to the hot surface igniter. When ignition temperature is
attained, the gas valve opens and ignition occurs. If stable flame is detected
the igniter will power down. If stable flame is not detected the control
system will close the valve to prevent further gas release. If a total of 3
ignition attempts fail an ignition fault is displayed.
Ignition Control
c
Rated at 43°C (109°F), 52°C (126°F) and
66°C (151°F) will prevent water of excessive
temperatures from being discharged from the heater. If the switch at the
header inlet, or if either switch at the heat exchanger outlet senses exces-
sive temperature, the gas valve will close and combustion will stop.
High Limit Switches
d
Senses water temperature by
means of a thermistor. Heater
will operate to attain and maintain the water temperature according to the
heater settings. Two separate thermostat settings are supported, typically
used to set pool and spa temperatures.
Pool/Spa Water Temperature Control
e
Senses whether or not water is available to
the heater by measuring back pressure at the
header inlet. If insufficient pressure is detected, the display will indicate a
“Check Flow” fault and combustion will stop.
Water Pressure Switch
f
Draws in air and fuel gas
creating an air/fuel mixture that
is passed through the burner for combustion. The fan will operate for
several seconds before flame initiation and after the flame is extinguished
to purge the combustion chamber for a clean burn and to expel any
residual exhaust gas.
Combustion Blower and Air Orifice
h
Monitors the vacuum (negative pressure) within
the blower housing. This switch verifies that air is
flowing through the combustion system by sensing pressure. If air flow is
inadequate, combustion will stop and a fault will be displayed.
Air Pressure Switch
i
The VersaFlo Integrated Bypass allows
for increased hydraulic efficiency when
the heater is not firing. When the JXi heater is not firing, a flow gate in the
bypass assembly is moved to the bypass position, allowing the water flow
within the heater header to bypass the heat exchanger and return directly to
the pool.
VersaFlo™ Integrated Bypass
j
