A.O. Smith ENT-30+, ENT-40+, ENT-50+, ENT-55+, ENSB-30 User Manual

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PROLINE® STANDARD

COMMERCIAL-GRADE RESIDENTIAL

COMMERCIAL-GRADE

RESIDENTIAL ELECTRIC WATER HEATERS

ENHANCED HEATING ELEMENTS

• Dual 4500 watt elements for fast recovery and reliable operation.*

• Incoloy stainless steel lower element lasts longer than a standard copper element.

DYNACLEAN™ DIFFUSER DIP TUBE

• Helps reduce lime and sediment buildup and maximizes hot water output. Made from long-lasting PEX cross-linked polymer (diffuser design is not used on lowboy models.)

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.

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 straightthrough water ﬂow but also a quick and positive shut off.

CODE COMPLIANCE

• Meets UBC and ICC National Codes and listed with CEC.

• 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.

6-YEAR LIMITED TANK AND PARTS WARRANTY

• For complete information, consult written warranty or go to hotwater.com.

*Model ENL-20 has a single element.

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

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AOSRE50608

T&P

ANODE (OR OPTIONAL

T&P

COMMERCIAL-GRADE

RESIDENTIAL ELECTRIC WATER HEATERS

Model

Number

Tall Models ENT-30† 30 47 0.95 21 4500 6000 46-1/2 39-1/2 19 95 ENT-40† 40 50 0.95 21 4500 6000 61-1/4 53-1/4 18 118 ENT-50† 50 73 0.95 21 4500 6000 60-1/2 51-1/4 20-1/2 125 ENT-55† 55 76 0.94 21 4500 6000 56-1/2 48-1/2 24 145

Short Models ENSB-30* 30 48 0.95 21 4500 6000 39 30-1/2 20 95 ENS-30† 30 49 0.95 21 4500 6000 39-3/4 30-1/2 22 94 ENS-40† 40 55 0.95 21 4500 6000 49-3/4 40-3/4 20-1/2 109 ENS-50† 50 62 0.95 21 4500 6000 49-1/4 40-3/8 23 161

Lowboy Top Connect Models ENL-20 19.5 N/A N/A 21 4500 6000 30 21-1/4 20 65 ENLB-30*† 28 40 0.95 21 4500 6000 30 21-3/4 20 90 ENL-30† 28 42 0.95 21 4500 6000 30 21-3/4 22 115 ENL-36† 36 46 0.95 21 4500 6000 32 24 24 118 ENLB-40*† 38 44 0.95 21 4500 6000 32 24 23 118 ENLB-50*† 48 57 0.95 21 4500 6000 34 25 26-1/2 172

Male 3/4” water connections on 8” center. *Models ship with supplied insulation blanket. †For 10-year tank and 6-year parts warranty, change “E” to “P” in the model number (example: ENT-30 becomes PNT-30). ENL-20 is a single element conﬁguration only. Optional top T&P location #2 is used on the ENT-50, ENT-55, ENS-40 and ENS-50. Optional top T&P location #3 is used on the ENLB-50, ENL-30, ENLB-30, ENLB-40 and ENL-36. Top T&P is not available on the 10 year lowboy models. 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)

VALV E

ACCESS

PANEL

TOP T&P LOCATION #1)

OPTIONAL TOP T&P LOCATION #3

OPTIONAL TOP LOCATION #2

JUNCTION BOX

T&P VALVE

ACCESS

PANEL

DRAIN

VALV E

For technical information call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

www.hotwater.com | 800-527-1953 Toll-Free USA

AOSRE50608

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