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Jandy® Legacy™ Model LRZE Pool/Spa Heater by Zodiac®
|
Installation and Operation Manual
Section 10. Professional
Maintenance and Service
WaRninG
SeRVicinG SaFetY
Some of the servicing procedures for the Legacy
Model LRZ electronic heater are hazardous
because they involve fuel gas, electricity, moving
parts and procedures which require testing or
temporary bypass of safety controls. For this
reason, the heater must be serviced only by a
qualified professional service technician.
iMPRoPeR SeRVice HaZaRd
The Legacy Model LRZ electronic heater incorpo-
rates unique design features. Incorrect service of
this heater can result in personal injury or damage
to property. To avoid such hazards, the heater must
be serviced only by a qualified professional service
technician.
aVeRtiSSeMent
PRÉcautionS LoRS deS RÉPaRationS et
de L’entRetien
Certaines procédures d’entretien et de réparation
des appareils de chauffage à faibles émissions
Legacy et Legacy présentent des dangers, car
elles mettent en jeu des gaz combustibles, des
composants électriques, des pièces mobiles et des
procédures qui nécessitent des mises à l’essai ou la
dérivation temporaire des commandes de sécurité.
Pour cette raison, l’appareil de chauffage doit être
entretenu et réparé uniquement par un technicien
professionnel qualifié.
danGeRS d’un entRetien inadÉQuat
Les appareils de chauffage à faibles émissions
comportent des caractéristiques techniques
uniques. Une réparation ou un entretien inadéquat
peut entraîner des blessures corporelles ou des
dommages à la propriété. Pour cette raison,
l’appareil de chauffage doit être entretenu et réparé
uniquement par un technicien professionnel qualifié.
10.1 General information
A qualified professional technician must service
the Legacy Model LRZ electronic pool heater using
Zodiac Pool Systems, Inc.'s service procedures. Before
calling for service, however, the owner should check
for obvious problems. The other components in the
pool system, including pump, filters and strainers,
water valves, gas supply, electrical power and time
clocks, have an affect on heater operation.
Confirm that the heater control is set to either
PooL
or
SPa
and that the corresponding temperature
set point is set high enough to make the heater
operate. Make sure the pump is operating, that the
filter and strainers are not clogged, that there are no
mispositioned water valves, that the gas or electric
power supplies are not shut off and that time clocks
are properly adjusted. Also be sure that there is no
blockage of the exhaust vent grill or rear louvers,
which supply combustion air to the burners.
10.2 natural-draft combustion System
The Legacy Model LRZ electronic pool and spa
heater has an atmospheric combustion system. This
system is illustrated in Figure 27.
As the heated exhaust gases rise out of the
combustion chamber, flow is created through the
system and fresh combustion air is drawn into the
heater through the louvers cut into the front and sides
of the heater. Gas is forced through an orifice into
the open end of a burner. When the gas flows into the
burner, a “negative” pressure is created at the opening
of the burner. This negative pressure pulls air into the
burner with the gas and mixes the two together. As
the gas/air mixture flows through the burner ports it is
ignited in the combustion chamber. Hot combustion
products then rise through a highly efficient heat
exchanger. Combustion products then enter a flue
collector and are directed to the outdoors through the
top of the heater or a vent pipe and cap.
10.3 Heater components and their
operation
1.
Gas Valve / Regulator
- The gas valve controls
gas flow into the manifold. It provides flow only
when the temperature control requires heat and
only if all safety controls enable operation. It
is also a positive pressure regulator. It regulates
the gas pressure in the manifold to specifica-
tions addressed earlier in this manual. This is
necessary for proper operation of the burner
system.
Figure 27. atmospheric combustion System
VENT TOP
FLUE COLLECTOR
HEAT EXCHANGER
COMBUSTION CHAMBER
BURNER
BURNER TRAY SHELF
Summary of Contents for LRZ Electronic
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