A.O. Smith GDV-50, GDVT-50 User Manual

DIRECT VENT

Residential Gas Water Heaters

DIRECT VENT DESIGN

• One-pipe, dual-channel closed system

draws all make-up air from outside the home, eliminating problems caused by insufﬁcient indoor ventilation and is FVIR compliant. Horizontal air intake and venting on all models up to 80 inches from outside wall with no electrical power needed.

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 themopile 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.

GREEN CHOICE® GAS BURNER

• Patented eco-friendly design reduces

NOx emissions up to 33% and complies with low emissions of less than 40 ng/J.

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.

PUSH BUTTON PIEZO IGNITOR

• Makes lighting pilot fast and easy with

one hand push button spark ignition.

HEAT TRAP NIPPLES

• Factory-installed for faster installation

ENHANCED-FLOW BRASS DRAIN VALVE

• Our residential water heaters have a

solid brass, tamper resistant, enhancedﬂow, 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.

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

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/IESNA 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.

DESIGN-LISTED 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.

6-YEAR LIMITED TANK AND PARTS WARRANTY

• For complete information, consult

written warranty or go to hotwater.com.

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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Residential Gas Water Heaters

Model

Number

GDV-40 40 72 0.63 38,000 41 64 49-3/4 22 13-1/4 15-1/4 42-1/2 29 15-1/4 Co-Axial 178 GDV-50 50 91 0.62 40,000 43 73 59 22 13-1/4 15-1/4 51-3/4 29 15-1/4 Co-Axial 200 GDVT-50 50 92 0.61 47,000 51 74 60 22 13-1/4 15-1/4 52-3/4 29 15-1/4 Co-Axial 215

Dual-channel system has 3” vent pipe inside 6” air intake pipe, for the 40 and 50-gallon models. All models have 2” foam cavity. Water connection is 3/4” male on 8” center. *Allow 29” for front to back dimension for gas control and air intake pipe at the rear of the heater. No option available for top T&P.

Gallon

Capacity

First Hour

Rating Gallon

Energy

Factor

Input BTU

Per Hour

Recovery 9OºF Rise

Gallon Per

Hour

A B C D E F *G H

All models are available in propane (LP) gas (series 301). All models are certiﬁed from sea level to 7,700 ft. elevation. All models available with side connections. Add “L” to the model number, example GDV-40L Dimensions and speciﬁcations subject to change without notice in accordance with our policy of continuous product improvement.

Dimensions in Inches

Vent

Outlet

Approx.

Shipping

Weight (lbs)

IMPORTANT! VENT INSTALLATION AND TERMINATION REQUIREMENTS

• Maximum horizontal vent distance is 80” to the outside

of exterior wall.

• Maximum vertical vent distance is 72” above heater

before 90 degree turn through exterior wall.

• Minimum horizontal vent distance is 17” to outside of

exterior wall.

• Vent pipes may be trimmed (cut) for short vent

installations.

• The recommended installation height for the vent

termination is dimension “A” in the above table. The minimum allowable height (center line of termination opening) is 60 ¾” for the 40-gallon model, 69 ½” for

21º

the 50-gallon 40,000 BTU input model, 70 ½” for the 50-gallon model, 47,000 BTU input model.

VENT RESTRICTOR PLATE:

• The vent restrictor plate is required for short horizontal

MINIMUM VENT

17”

MAXIMUM VENT

80”

vent runs less than 30” horizontal and for vent runs

6” DIA. ON 40 & 50 GAL. MODELS

when the termination’s height is greater than 48” above the heater. The only time the restrictor is not required is for horizontal runs greater than 30” in length with the termination less (lower) than 48” above the heater. See installation instructions for complete details.

3/4” MALE NPT OUTLET & INLET

OFFSET VENT ARRANGEMENT:

• The vent run may have one (1) 90 degree horizontal

turn prior to terminating through the exterior wall. See installation instructions for complete details.

• Vent termination clearance hole through the exterior

wall should be approximately 7” diameter.

• Snow accumulation and drifting should be considered

SIDE TAP AND T&P

FRONT

EXTERIOR WALL

when locating the termination.

• An optional wire grill vent cap protector is available

through the parts department (part number

9006627005).

• See the installation manual for complete installation

and venting requirements.

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

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