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ENGLISH
Installation and Operation Manual
|
Jandy
®
LXi
™
Model Pool and Spa Heater by Zodiac
®
Section 10. Professional
Maintenance and Service
WARNING
SERVICING SAFETY
Some of the servicing procedures for the LXi heater
are hazardous because they involve fuel gas, electric-
ity, moving parts and procedures which require testing
or temporary bypass of safety controls. For this rea-
son, the heater must be serviced only by a qualified
professional service technician.
IMPROPER SERVICE HAZARD
The LXi heater incorporates unique design features.
Incorrect service of this heater can result in per-
sonal 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 LXi et LXi
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 com-
mandes 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 com-
portent 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 tech-
nicien professionnel qualifié.
10.1 General Information
A qualified professional technician must service
the LXi pool heater using Zodiac'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
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” Forced-Draft Combustion
System
The LXi pool and spa heater has a forced-draft
combustion system incorporating special burners and a
combustion blower. The burners are of special design
in which the combustion air passes through the burn-
ers, resulting in a "premix" process. When burning
natural gas, this process produces very little Nitrous
Oxide emissions. Air and gas are pushed into the
burner venturis where they are mixed and conveyed
to the combustion chamber. Hot combustion products
pass through a highly efficient heat exchanger, where
water absorbs most of the heat. Exhaust is directed to
the outdoor air through a grill, or for indoor heaters,
through vent piping.
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 specifications ad-
dressed earlier in this manual. This is necessary
for proper operation of the burner system.
2.
Combustion Blower and Air Orifice
– The
blower delivers air to the burners. This air is
used to combust the fuel. This air is also used to
purge the combustion chamber of unburnt fuel
before ignition and after the burners turn off. It is
normal for the fan to start before the main flame
starts and to continue operating after the flame
has ceased. The air orifice controls the amount of
air that is delivered to the burners. This orifice is
adjustable. The adjustment helps maintain proper
combustion. It should be adjusted to specifica-
tions addressed earlier in this manual.
3.
Temperature Control
- The LXi heater models
are equipped with an electronic control which
senses water temperature by means of a therm-
istor and controls heater operation to bring the
water to the temperature selected. It has an option
for two (2) separate thermostat settings which are
typically used to set pool and spa temperatures.
4.
Ignition Control
- The ignition control provides
energy for ignition of the air/gas mixture, moni-
tors the flame and controls the gas valve. When
the temperature control calls for heat, the ignition
control provides a pre-purge of the combustion
chamber. Once the pre-purge is complete the
