A.O. Smith PXNT-40, PXNT-50, PXNT-55, PXNS-40, PXNS-50 User Manual
COMMERCIAL-GRADE
RESIDENTIAL ELECTRIC WATER HEATERS
PROLINE
®
XE ELECTRONIC DISPLAY
COMMERCIAL-GRADE RESIDENTIAL
ELECTRONIC USER INTERFACE
• Touchscreen display.
• Multiple operating modes help save money.
• Energy saver and vacation modes available.
• Diagnostic feedback.
• Dry fire protection.
ENHANCED HEATING ELEMENTS
• Dual 5500 watt elements for the fastest
recovery and reliable operation.
• Incoloy stainless steel elements last longer
than standard copper elements.
HIGH ENERGY FACTORS
• Eco-friendly non-CFC foam insulation, heat
traps and other features combine to yield
a higher Energy Factor that maximizes
savings on operating costs.
DYNACLEAN™ DIFFUSER DIP TUBE
• Helps reduce lime and sediment buildup
and maximizes hot water output. Made
from long-lasting PEX cross-linked polymer.
COREGARD™ ANODE ROD
• Our anode rods have a stainless steel core
that extends the life of the anode rod
allowing superior tank protection far longer
than standard anode rods.
BLUE DIAMOND® GLASS COATING
• Provides superior corrosion resistance
compared to industry standard glass lining.
ENHANCED-FLOW BRASS DRAIN
VALVE
• Our residential water heaters have a solid
brass, tamper resistant, enhanced-flow, ball
type, drain valve.
• Uses a standard female hose fitting that
allows for fast and easy draining during
maintenance.
• Designed for easy operation, this valve
includes an integral screwdriver slot that
features a ¼ turn (open/close) radius, which
not only permits full straight-through water
flow but also a quick and positive shut off.
CODE COMPLIANCE
• Meets UBC, CEC and HUD National Codes.
• Meets the thermal efficiency and standby loss
requirements of the U.S. Department of Energy
and current edition of ASHRAE/IES 90.1.
• Complies with the Federal Energy
Conservation Standards effective April 16,
2015, in accordance with the Energy Policy
and Conservation Act (EPCA), as amended.
APPROVED FOR MANUFACTURED
HOUSING
• All residential electric water heaters are
compliant with HUD standards for mobile
homes/manufactured housing.
CERTIFIED TO UL 174 FOR HOUSEHOLD
ELECTRIC WATER HEATERS
CSA CERTIFIED AND ASME RATED T&P
RELIEF VALVE
DESIGN-LISTED BY UNDERWRITERS
LABORATORIES
• Certified at 300 psi test pressure and 150 psi
working pressure.
• Listed according to UL 174 standards
governing storage tank-type electric water
heaters.
10-YEAR LIMITED TANK AND PARTS
WARRANTY
• For complete information, consult written
warranty or go to hotwater.com.
© February 2017 A. O. Smith Corporation. All Rights Reserved
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
Page 1 of 2
AOSRE50600
COMMERCIAL-GRADE
RESIDENTIAL ELECTRIC WATER HEATERS
Model Number
Tall Models
PXNT-40 40 61 0.95 25 5500 5500 61-1/4 53-1/4 20 118
PXNT-50 50 79 0.95 25 5500 5500 60-1/2 51-1/4 22 134
PXNT-55 55 79 0.94 25 5500 5500 56-1/2 48-1/2 24 145
Short Models
PXNS-40 40 56 0.95 25 5500 5500 49 3/4 40-3/4 20-1/2 109
PXNS-50 50 71 0.95 25 5500 5500 49-1/4 40-1/4 23 161
3/4” water connections on 8” center.
Top-mounted T&P valve not available.
Only available for 240V or 208V applications.
Equipped as dual element only, no single element configurations available.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Gallon
Capacity
First Hour Rating
Gallon
Energy
Factor
Recovery @
90°F Rise
Gallon Per
Hour
Element Wattage 240V Dimensions in Inches
Standard Maximum A B C
Approx.
Shipping
Weight (lbs)
USER INTERFACE SMARTPORT MODULE
T&P VALVE
VACATION
STANDARD
ENERGY
GRID
SMART
ENABLED
ACCESS
F
°F/°C
PANEL &
USER
INTERFACE
ANODE
ACCESS
PANEL
SMART PORT
MODULE
CONNECTION
DRAIN
VALVE
T&P VALVE
JUNCTION BOX
For Technical Information, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
© February 2017 A. O. Smith Corporation. All Rights Reserved
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
Page 2 of 2
AOSRE50600
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