A.O. Smith HWR 40, HWG 50, HWR 50, HWRT 50, HWRX 55 User Manual

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COMMERCIAL-GRADE

RESIDENTIAL GAS WATER HEATERS

PROLINE® MASTER ATMOSPHERIC VENT

COMMERCIAL-GRADE RESIDENTIAL

INTELLIGENT CONTROL LOGIC*

• The internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response to optimize performance.

• Uses a thermopile to generate the power needed to operate the electronic gas control without requiring an external power source.

• The electronic gas control incorporates an LED status indicator that monitors system operation and service diagnostics.

• *Not available on 60,000 BTU input models (GCRX-50 and GCRX-55).

GREEN CHOICE® GAS BURNER

• Patented eco-friendly burner design reduces NOx emissions by up to 33% and complies with Low-NOx emission requirements of less than 40 ng/J.

DYNACLEAN™ DIFFUSER DIP TUBE

• Reduces 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.

• ProLine® Master products have increased anode protection with either longer, or multiple anodes depending on model.

PUSH-BUTTON PIEZO IGNITOR

• Makes lighting the pilot fast and easy with one-hand push-button spark ignition.

HEAT TRAP NIPPLES

• Factory-installed for faster installation.

BLUE DIAMOND® GLASS COATING

• Provides superior corrosion resistance compared to industry standard glass lining.

• Blue Diamond® Glass coating blend is formulated in the same lab that creates the protection for our industry-leading commercial product line.

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 1/4 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.

HIGH UNIFORM ENERGY FACTOR (UEF)

• Eco-Friendly non-CFC foam insulation, external heat traps and specially designed combustion chamber combine to produce a high UEF for maximum savings on operating costs.

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

MAXIMUM HYDROSTATIC WORKING PRESSURE 150 PSI

DESIGN-CERTIFIED BY CSA INTERNATIONAL

• Certiﬁed at 300 psi test pressure and 150 psi working pressure. Listed according to ANSI Z21.10.1-CSA 4.1 standards governing storage tank-type gas water heaters.

8-YEAR LIMITED TANK AND PARTS WARRANTY

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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AOSRG47104

COMMERCIAL-GRADE

RESIDENTIAL GAS WATER HEATERS

Model

Number

Tall Models

HWR 40 40 38 80 0.66 40,000 36,000 42 61-3/4 58-1/4 20 12-1/4 8 52 N/A N/A 3 or 4 138

HWG 50 50 48 81 0.62 40,000 37,000 41 60-3/4 57-1/4 21 12-1/4 8 50 1/2 N/A N/A 3 or 4 148

HWR 50 50 48 84 0.62 40,000 37,000 43 60-3/4 57-1/4 22 12-1/4 8 50-1/2 N/A N/A 3 or 4 165

HWRT 50* 50 48 89 0.61 50,000 45,000 54 60-3/4 57-1/4 22 12-1/4 8 50-1/2 14-1/4 50-1/2 4 165

HWRX 55* 55 55 83 0.62 60,000 54,000 65 59-3/4 55-1/4 24 13-1/2 8 48 14-1/4 48 4 185

Short Models

HWRL 40 40 38 67 0.59 40,000 36,000 41 51-1/2 48 22 12 8 41-1/4 N/A N/A 3 or 4 135

HWRL 50 50 50 81 0.62 40,000 40,000 43 53-1/4 49-3/4 24 12 8 41-3/8 N/A N/A 3 or 4 177

Recovery capacities based on actual performance tests. Water connection is 3/4” on all models *For optional side-mounted recirculating taps, add “L” to the sufﬁx (example: HWRT 50L). All models approved for installation from sea level to 10,100 ft. elevation. Dimensions and speciﬁcations subject to change without notice in accordance with our policy of continuous product improvement.

Nominal

Gallon

Capacity

Rated Storage Volume

First

Hour Rating Gallon

FLAMMABLE VAPOR IGNITION RESISTANT

UEF

BTU

Input

Natural

Gas

BTU

Input

Propane

Gas

Recovery 90°F Rise

Gallon

Per Hour

Dimensions in Inches Approx.

A B C D E F *G *H

ANODE ROD

Draft

Hood

Shipping

(FVIR) WATER HEATERS

A. O. Smith FVIR design meets the American National Standards Institute standards (ANSIZ21.10.1-CSA 4.1) that deal with the

CONNECTION

HOT

accidental or unintended ignition of ﬂammable vapors, such as those emitted by gasoline.

Features a sealed combustion chamber with intake air ﬁlter and a ﬂame arrestor built into the water heater base. In addition, a thermal cutoff (TCO)

E C

COLD CONNECTION

device, is designed to shut off gas ﬂow to the burner and pilot if poor combustion is detected.

Weight

(lbs)

T&P VALVE

1/2" GAS

CONNECTION

Maximum Hydrostatic Working Pressure: 150 PSI

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

AOSRG47104

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