Specifications

Conrm 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 lter 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, ow 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 orice into the open
end of a burner. When the gas ows 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 ows through the burner ports it is ignited
in the combustion chamber. Hot combustion products
then rise through a highly efcient heat exchanger.
Combustion products then enter a ue 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 ow into the manifold. It provides ow 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 specications
addressed earlier in this manual. This is necessary
for proper operation of the burner system.
Section 10. Professional
Maintenance and Service
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
qualied professional service technician.
IMPROPER SERVICE HAZARD
The Legacy Model LRZ electronic heater incor-
porates unique design features. Incorrect service
of this heater can result in death, personal injury
or damage to property. To avoid such hazards,
the heater must be serviced only by a qualied
professional service technician.
WARNING
PRÉCAUTIONS LORS DES RÉPARATIONS ET
DE L’ENTRETIEN
Certaines procédures d’entretien et de répa-
ration des appareils de chauffage à faibles
émissions Legacy et Legacy présentent des
dangers, car elles mettent en jeu des gaz com-
bustibles, 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 profession-
nel qualié.
DANGERS D’UN ENTRETIEN INADÉQUAT
Les appareils de chauffage à faibles émissions
comportent des caractéristiques techniques
uniques. Une réparation ou un entretien
inadéquat peut resulter en la mort, les blessures
corporelles ou les dommages à la propriété. Pour
cette raison, l’appareil de chauffage doit être
entretenu et réparé uniquement par un technicien
professionnel qualié.
AVERTISSEMENT
10.1 General Information
A qualied 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, lters and strainers, water
valves, gas supply, electrical power and time clocks,
have an affect on heater operation.
Figure 27. Atmospheric Combustion System
VENT TOP
FLUE COLLECTOR
HEAT EXCHANGER
COMBUSTION CHAMBER
BURNER
BURNER TRAY SHELF
Page 36
ENGLISH
Jandy
®
Legacy™ Model LRZE Pool/Spa Heater by Zodiac
®
|
Installation and Operation Manual