Jandy JXi 200 Installation And Operation Manual - Warning
Page 17
ENGLISH
Jandy
®
Pro Series, JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
4.3.1
Connect the Digital Differential Manometer.
a
Connect a tee to the hose running from the fan inlet
port on the blower to the gas valve vent port.
b
Connect one leg of the tee to the gas valve vent port.
c
Connect the third leg of the tee to the positive (high
pressure) side of the digital differential manometer.
d
Remove the 1/8” NPT plug from the gas valve
manifold port (labeled “PRESS” “TAP”) using a 3/16”
Hex Key.
e
Install a 1/8” to 1/16” barbed adapter.
f
Connect a hose from the barbed adapter to the
negative (low pressure) side of the digital differential
manometer.
• Start the heater and record the gas offset pressure.
• Measurement should be
-0.2” WC (Inches Water
Column) +/- 0.1” WC.
• If the offset pressure is incorrect an adjustment can
be made. See
Section
4.3.2
for details
•
If no adjustment is required, remove manometer,
hoses, tee and barbed fi tting from the gas valve.
•
Reconnect the hose from the Fan Inlet Port to the Gas
Valve Vent Port.
•
Apply joint compound to the NPT plug and reinstall at
the gas valve manifold port (labeled “PRESS” “TAP”).
• Before operation, test the complete gas supply system
and all connections for leaks using a soap solution.
Do not use an open fl ame to test for leaks.
4.3.2
Gas Offset Pressure Adjustment
If the offset pressure is incorrect an adjustment can be
made to bring the offset pressure within the required
range. Prior to making any gas valve adjustments:
• Ensure that the inlet gas pressure from
Section 4.2
is
within the specifi ed range.
• Ensure that the manometer has been connected in
accordance to steps a-f in
Section 4.3.1
.
•
Ensure that all hoses, barbed fi ttings plugs and caps
are securely in place and not leaking.
• With the heater running read and record the
offset pressure displayed on the manometer. If an
adjustment is still required:
a
Remove the gas valve sealing cap.
b
Using a fl at head screwdriver turn the plastic
adjustment screw as follows:
To Increase Offset Pressure:
Turn the adjustment screw 1/4 turn clockwise.
To Decrease Offset Pressure:
Turn the adjustment screw 1/4 turn counter clockwise.
• Once the proper gas offset pressure has been
achieved. Securely reinstall the gas valve sealing cap.
• Shut down the heater at the user interface.
•
Remove manometer, hoses, tee and barbed fi tting
from the gas valve.
•
Apply joint
compound to the
NPT plug and
reinstall at the gas
valve manifold port
(labeled “PRESS”
“TAP”).
• Before operation,
test the complete
gas supply system
and all connections
for leaks using a
soap solution. Do
not use an open
fl ame to test for
leaks.
WARNING
Failure to replace the 1/8 inch NPT gas valve plugs on inlet, gas
offset pressure ports, and cap on the manifold pressure adjustment
screw, can result in property damage, severe injury, or death.
CAUTION
Some leak test solutions (including soap and water) may cause
corrosion or stress cracking. Rinse the piping with water after testing.
b
f
c
a
ON
OFF
UNITS
ZERO
NEGATIVE
(Low Pressure Port)
_
POSITIVE
(High Pressure Port)
+
DIGITAL
MANOMETER
FAN INLET PORT
“T” JOINER
GAS VALVE VENT PORT
GAS VALVE MANIFOLD PORT LABELED
“PRESS” “TAP”
e
d
PRESS
TAP
Remove Cap
b
a
- Decrease Pressure
(Counter Clockwise)
+ Increase Pressure
(Clockwise)
Pressure Adjustment