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SECTION 10.
Professional Maintenance and
Service
WARNING
SERVICING SAFETY
Some of the servicing procedures for the LX
and LT Low NOx heaters 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 LX and LT Low NOx heaters incorporate
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 NOx LX et LT 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
NOx 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 LX and LT Low NOx pool heaters using Jandy's
service procedures. Before calling for service, how-
ever, 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 tempera-
ture limit is set high enough to make the heater
operate. Make sure the pump is operating, that the
filter and all baskets are clean, that there are no mis-
positioned 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 "Premix" Induced-Draft Combustion
System
The LX and LT Low NOx pool and spa heaters
have an induced-draft combustion system incorporat-
ing special burners and a combustion blower. The
burners are of special design in which most of the
combustion air passes through the burners, resulting in
a "premix" process. When burning natural gas this
process produces very low NOx emission. This system
is illustrated in Figure 36.
Figure 36. Induced Draft Combustion System
