A.O. Smith Cyclone XL 100 Series, Руководство по обслуживанию

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INSTALLATION CONSIDERATIONS INSTALLATION CONSIDERATIONS
This section of the Service Handbook covers some of the critical installation requirements that, when overlooked, often result in
operational problems, down time and needless parts replacement. Costs to correct installation errors are not covered under the limited
warranty. Ensure all installation requirements and instructions contained in the Instruction Manual that came with the water heater have
been followed prior to performing any service procedures.
INSTRUCTION MANUAL
Have a copy of the Instruction Manual that came with the water heater on hand for the model and series number being serviced.
Installation information given in this Service Handbook is not a complete installation instruction. Installation information given in this
Service Handbook has a limited focus as it applies to servicing the water heater. This Service Handbook does not replace or supersede
the Instruction Manual that came with the water heater. Always refer to the Instruction Manual for complete installation instructions. If
the Instruction Manual is not on hand, copies can be obtained from the manufacturers web site or by calling the technical support phone
number shown on the back cover of this Service Handbook.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or such conditions as high line pressure, among others, have installed
devices such as pressure reducing valves, check valves, and back flow preventers. Devices such as these cause the water system to
be a closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a closed system the volume of water will grow when it is heated. As the volume
of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause
premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause
intermittent Temperature-Pressure Relief Valve operation: water discharged from the valve due to excessive pressure build up. This
condition is not covered under the limited warranty. The Temperature-Pressure Relief Valve is not intended for the constant relief of
thermal expansion.
A properly sized and pressurized thermal expansion tank must be installed on all closed systems to control the harmful effects of
thermal expansion. Contact a local plumbing service agency to have a thermal expansion tank installed.
AIR REQUIREMENTS
Carefully review the requirements for combustion and ventilation air in the Instruction Manual that came with the water heater. Failure to
meet these requirements when the water heater is installed or overlooking their importance when servicing the water heater often
results in needless down time, unnecessary parts replacement, and customer dissatisfaction.
An inadequate supply of air for combustion and ventilation often causes operational problems. A lack of combustion and ventilation air
can create a negative ambient air pressure in the installed space which can lead to improper combustion and operational problems with
pressure switches.
CONTAMINATED AIR
Combustion air that is contaminated can greatly diminish the life span of the water heater and water heater components such as
Igniters and Burners. Propellants of aerosol sprays, beauty shop supplies, water softener chemicals and chemicals used in dry cleaning
processes that are present in the combustion, ventilation or ambient air can cause such damage.
Vapors from volatile compounds such as solvents, cleaners, chlorine based chemicals and refrigerants in addition to being highly
flammable in many cases, can also react to form highly corrosive substances such as acids inside the combustion chamber. The results
can be hazardous and cause product failure.
If the water heater is installed in beauty shops, barber shops or laundries with dry cleaning equipment, it is imperative the water heater
be installed in a Direct Vent configuration so that air for combustion is derived directly from the outdoor atmosphere through a sealed
intake air pipe. See the venting installation section in the Instruction Manual that came with the water heater for more information on
Direct Vent installations.