Jandy -Low NOx Installation And Operation Manual - page 34
Page 32
5.
If the heater is equipped with a pressure relief
valve, check for corrosion in and around the
valve. Twice a year, with the filter pump on, lift
the release lever on the top of the valve to make
sure that water runs freely through it. If corro-
sion is found, replace the pressure relief valve.
When replacing the valve, be sure that the pump
is off. Install the valve so that the discharge is
directed away from any area that may be
damaged by water.
6.
Be sure all combustion air and ventilation open-
ings are not blocked. Check for spider webs and
other debris inside the heater, in the vents on all
sides of the heater jacket and in the exhaust
outlet– especially after a long period of nonuse.
8.3.2 Professional Inspection
Inspections performed at least once a year by a
qualified technician are required to maintain your
heater's safe and efficient operation. The following
basic safety checks must be performed.
1.
Check for loose or broken wires and terminal
connections.
2.
Make sure that the pressure switch operates
properly by shutting the filter pump off and on a
few times. The burner should go off immediately
after the pump stops. An ignition sequence
should start shortly after the pump is turned back
on.
3.
Inspect the electrical controls, specifically the
following:
a. High limit controls.
b. Water pressure switch.
c. Exhaust temperature limit switch.
d. Automatic gas valve.
e. Fusible link.
f. Temperature control.
g. Control circuit fuse.
h. Ignition control.
i. Air pressure switch.
4.
Inspect the venting system for blockage, leakage,
and corrosion.
5.
Inspect the combustion blower for damage.
6.
Check for spider webs or other obstructions in
the main burner orifices – especially at Spring
start-up. Clean with wire brush if necessary.
7.
Conduct a normal operating cycle and observe
that the sequence proceeds as intended.
CAUTION
For your safety, when starting the heater, keep
your head and face away from the burner area
opening to prevent any risk of personal injury.
ATTENTION
Pour votre sécurité personnelle, lorsque vous
mettez l’appareil en marche, tenez votre tête et
votre visage loin du brûleur pour éviter tout
risque de blessure.
8.
If the heater is equipped with a pressure relief
valve, clean any accumulated corrosion and
make sure that water runs freely.
9.
Inspect the outside of the combustion chamber
and burner for corrosion and indication of
improper operation.
10.
Perform a temperature rise test in accordance
with Section 7.6.
11.
Regularly inspect electrical controls for deteriora-
tion. Repair and replace as necessary.
12.
Make a visual check of the main burner flame.
The flame can be seen in a view port on the front
panel of the combustion chamber. When the
blower is on low speed, the flame should be light
blue in color and short (see Figure 32). When
the blower is at full (high) speed, the flame will
spread out over the burners in a "flying" mode
and will remain light blue in color (see Figure 33).
If flame appearance is otherwise, adjustment is
necessary as described in the following section.
NOTE: After installation and first start-up,
check the heat exchanger for black carbon soot
buildup after the following periods of operation:
24 hours, 7 days, 30 days, 90 days and once
every 6 months thereafter.
NOTE: Keep this manual in a safe place for
future reference by you and your professional
technician when inspecting and servicing the
heater.
SECTION 9.
Troubleshooting
9.1 General Heater Troubleshooting
Table 10 lists some of the more common prob-
lems, causes and solutions encountered when running
the heater. Most problems occur when the heater is
being started for the first time after installation or at
Spring start-up. Careful installation and maintenance
will help ensure years of trouble free use from your
LX or LT Low NOx heater.
Be aware that premix combustion systems of the
type found in the LX and LT heaters have special
characteristics that affect operation and troubleshoot-
ing. See Sections 10.2 and 10.3 for important informa-
tion about the system.