A. O. Smith SUNX-120 User Manual
Residential Electric Indirect
Solar Booster Water Heaters
A. O. Smith 80 and 120-gallon indirect solar booster water heaters are
specially designed for installation as part of closed loop solar water heating
system. They provide storage for the hot water produced by the solar panels
and a supplementary for water produced by the solar panels and a supplementary electric heating element that maintains consistent water temprature during periods when solar energy is not available. Count on A. O. Smith
for innovative products that provide hot water solutions for residential
renewable energy applications.
INTERNAL HEAT EXCHANGER
■ Single wall internal coil-type heat exchanger for the most efficient heat transfer from
solar panels
■ Suitable for propylene glycol heat transfer fluid with corrosion inhibitor
ELECTRICAL
■ 4500 watt heating element – long lasting low-watt density design spreads wattage
over larger surface area to prolong element life and maximize efficiency
■ Prewired for surface mount temperature sensor (sensor supplied separately)
CONSTRUCTION
■ PermaGlas
corrosion to maximize tank life.
■ 2 Inch thick “Environmentally-Friendly” Non-CFC Foam insulation (R16 Value) reduces
standby heat loss.
®
Ultra Coat™ Glass Lined Steel Tank – patented glass lining protects against
DYNACLEAN™ DIFFUSER DIP TUBE
■ Helps reduce lime and sediment buildup to maximize hot water output
■ Made from long-lasting PEX cross-linked polymer
TWO COREGARD™ ANODE RODS
■ Primary and secondary magnesium anodes with stainless steel core protect tank against
corrosion longer than ordinary anodes
FACTORY-INSTALLED CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE
DURABLE TAMPER-RESISTANT BRASS DRAIN VALVE
PEX-LINED, HEAT TRAP NIPPLES FOR EFFICIENCY
CODES AND STANDARDS
Complies with current editions of: UL Standard for Household Electric Storage Tank Water
Heaters, UL 174; Canadian Standard for Construction and Test of Electric Storage-Tank Water
Heaters, CAN/CSA-C22.2 No. 110-M90; Packaged Solar Domestic Hot Water Systems (Liquid-toLiquid Heat Transfer) For All-Season Use, F379.1-09; Packaged Solar Domestic Hot Water
Systems for Seasonal Use, F379.2-09 and ICC Codes and HUD Standards. Complies with California legislation AB 1953 and Vermont legislation Act 193 that limits the lead content in plumbing fixtures that come into contact with drinking water to a maximum of 0.25%.
MODEL SUNX-80
Low Lead Content
Eligible for a 30% Federal
Tax Credit when installed as
part of a complete Cirrex®
solar water heating system.
For more information, visit
www.hotwater.com.
6-YEAR LIMITED TANK AND PARTS WARRANTY
For complete information, consult written warranty supplied with the product or contact A. O.
Smith Water Products Company.
Revised August 2011
Page 1 of 2
AOSQE50000
Residential Electric Indirect
Solar Booster Water Heaters
MODEL
NUMBER
SUNX-80 76 4500 21 1 2 63-1/4 5-3/8 30-1/8 24 257
SUNX-120 108 4500 21 1 2 63-1/4 5-3/8 26-1/2 28 365
All dimension in inches.
Recovery capacity based on element performance.
Working Pressure = 150 PSI
GALLON
CAPACITY
ELEMENT
WATTAGE
(240 VOLT)
¾" HOT DOMESTIC OUTLET
RECOVERY
90° RISE
GALLONS
PER HOUR
ELEMENTS
ANODE
NUMBER
OF
FOAM
THICKNESS
(INCHES)
˚
0
3
3
0
˚
ANODE
8"
1¼"
4500 WATT ELECTRIC
HEATING ELEMENT COVER
HEIGHT
TEMPERATURE SENSOR MOUNTING
BEHIND LOWER COVER
DIMENSIONS IN INCHES
¾" COLD DOMESTIC INLET
TOP T&P OPTION
T&P VALVE
1" NPT
INLET FROM
COLLECTOR
1" NPT
OUTLET TO
COLLECTOR
HEIGHT TO
T&P VALVE
55.15"
B
APPROX.
SHIPPING
WEIGHT
(LBS)HEIGHT A B DIAMETER
A
DIAMETER
HEAT EXCHANGE COIL DATA
TOTAL
MODEL
NUMBER
SUNX-80 1.3 16 2.8 40.8
SUNX-120 1.55 18.8 4 41
Heat exchanger must only be used with a propylene glycol heat transfer fluid containing corrosion inhibitors such as Dowfrost™
Working Pressure = 150 PSI
For Technical Information and Automated Fax Service, call 800-527-1953.A. O. Smith Corporation reserves the right to make product changes or improv ements without prior notice.
Revised August 2011 Page 2 of 2
TUBE I.D.
(INCHES)
SURFACE
AREA
(SQUARE FT)
COIL
CAPACITY
(GALLONS)
TUBE
LENGTH
(FT)
www.hotwater.com AOSQE50000
PRESSURE DROP THROUGH COIL (FEET OF H20)
HEAD LOSS (FEET)
FLOW RATE (GPM)
2 0.1 0.05
4 0.3 0.15
6 0.5 0.25
SUNX-80 SUNX-120
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