AO Smith Commercial Grade Residential Electric Water Heaters Owner’s Manual

: October 27, 2023
: AO Smith

AO Smith Commercial Grade Residential Electric Water Heaters Owner’s

Manual

PROLINE ® MASTER SMART ELECTRIC WATER HEATERS

Get smarter hot water from A. O. Smith. Our ProLine® Master Smart Electric water heaters are designed with iCOMMTM Wi-Fi technology greater control, leak detection and protection to provide homeowners with peace of mind.

ELECTRONIC CONTROLS WITH WIFI CONNECTIVITY

Standard and vacation operating modes
Seven-segment display
Diagnostic feedback
Element “Dry-Fire” protection

REMOTE CONTROL THROUGH THE

O. SMITH APP

Change water temperature and operating mode remotely
Schedule hot water demand for optimized performance

LEAK DETECTION SENSOR

Sounds an audible alarm when water is detected

AUTOMATIC SHUT-OFF VALVE

Closes valve on incoming cold water inlet when leak is detected

ENHANCED HEATING ELEMENTS

Dual 5500 watt elements for the fastest recovery and reliable operation
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 high Energy Factor that maximizes savings on operating costs

SELF CLEANING DIP TUBE

Helps reduce lime and sediment buildup and maximizes hot water 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 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

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

8-YEAR LIMITED TANK AND PARTS WARRANTY

4 year warranty extension available
For complete information, consult written warranty or go to com

RESIDENTIAL ELECTRIC WATER HEATERS

Model Number

|

Nominal Capacity

|

Rated Storage Volume

| First Hour Rating (Gallons)|

UEF

| Recovery @ 90 °F Rise Gallon

Per Hour

| Element Wattage 240V| Dimensions in Inches| Approx. Shipping Weight (lbs)
---|---|---|---|---|---|---|---|---
Standard| Maximum| A| B| C
Tall Models
HETF-40| 40| 36| 63| 0.93| 25| 5500| 5500| 60-1/4| 53-1/4| 20| 106
HETF-50| 50| 45| 74| 0.92| 25| 5500| 5500| 59| 51-1/4| 20-1/2| 109
HETF-55| 55| 55| 75| 0.94| 25| 5500| 5500| 56-1/2| 48-1/2| 24| 145
Short Models
HESF-40| 40| 37| 64| 0.92| 25| 5500| 5500| 49-3/4| 40-3/4| 20-1/2| 95
HESF-50| 50| 46| 67| 0.92| 25| 5500| 5500| 49-1/4| 40-1/4| 23| 117

3/4” water connections on 8” center.
Only available for 240V or 208V applications. 208 volt only available with 4,500 watt elements. Equipped as dual element only, no single element configurations available.
Minimum wattage available is 4,500 watt elements.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.