Brochure

32
Automatic Circulating
Water Heaters
The A. O. Smith high efficiency condensing XP Water Heater
utilizes a state-of-the-art heat exchanger and control technology
to provide large volumes of hot water for demanding commercial
and industrial potable hot water applications. The all stainless
steel water tube heat exchanger construction allows the XP Water
Heater to operate in a continuous condensing mode while
maximizing longevity and delivering thermal efficiencies as high
as 99% when operating in low temperature applications.
A unique multi-burner design is control sequenced and
modulated to produce turndown rates of up to 20:1. Precise
temperature control and accurate load matching produce smooth
system operation and eliminates wasteful short cycling and
temperature overshooting.
Advanced Multi-Burner, Low NOx
Combustion Technology
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Venturi-mixing gas / air ratio system - works with variable speed
blower to precisely mix gas and air throughout firing range
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Fully modulating capability prevents energy-stealing short
cycling and provides smooth system operation with higher
overall system efficiencies
Low NOx Operation
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Complies with SCAQMD Rule 1146.2 for XWH1000 through
XWH2000 and Rule 1146.1 for XWH2600 and XWH3400, and
other air quality management districts with similar
requirements for low NOx emissions
Advanced Sola Control
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Large touch screen user interface
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Factory standard with MODBUS protocol connections
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The latest in energy saving algorithms
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Includes remote tank temperature control to adjust tank
temperature at the water heater - modulates the water heater
to maintain tank set point temperature within +/-1 degree
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Water heater output control features 20:1 turndown ratio on
models 2 million btuh and up, 10:1 turndown ratio on models
1.7 million btuh and down
All-Bronze Factory-Mounted Pump(s)
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Integrally mounted, wired, and controlled by the water
heater control
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Factory-sized for proper flow between water heater and
storage tank
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Allows 50 equivalent feet of piping between water heater
and tank
Multi-Pass/Multi-Burner Condensing Stainless Steel
Heat Exchanger
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Utilizes leading-edge multi-pass water tube heat exchanger to
maximize heat transfer
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Designed for fully condensing operation throughout the
heating range
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All heating surfaces are 316L stainless steel to provide a long and
trouble-free service life
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Saves both fuel and operating cost with every heating cycle
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Impervious to thermal shock
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