A.O. Smith GPHE-50 User Manual

Residential Gas Water Heaters

90% THERMAL EFFICIENCY ENDLESS HOT WATER VERSATILE POWER-VENT DESIGN

Today’s homes demand more hot water than ever before, and the 90% efﬁcient Vertex power-vent gas water heater offers unprecedented levels of performance to meet the need. The 50-gallon Vertex delivers hot water output that rivals a 75-gallon atmospheric gas water heater. In fact, the fully condensing Vertex design is so advanced, it can deliver “endless hot water for showers”…a continuous ﬂow of over 3 gallons per minute.* Yet Vertex is easy to install, with height, diameter and installation requirements similar to standard power-vent units.

HELICAL INTERNAL HEAT EXCHANGER

• Completely surrounded by water in tank, provides much greater heat transfer surface than standard straight ﬂue tube

• Helps produce 90% thermal efﬁciency, which saves money on operating costs compared to a standard 78% efficient gas water heater

POWER VENTS USING PVC PIPE

• Combined vertical and horizontal vent runs terminating through an outside wall, using Schedule 40 PVC pipe

• 2" pipe, vents up to 25 equivalent feet

• 3" pipe, vents up to 65 equivalent feet

• 4" pipe, vents up to 128 equivalent feet

GPHE-50

MODULAR BLOWER

• Equipped with 120 volt, 60 Hz electrical system (rating 5 amps or less), 6-foot cord with standard 3-prong connector

• 2" PVC pipe, elbows and condensate drain supplied to connect heat exchanger outlet to blower

• PVC Vent Attenuation Assembly (VAA) supplied

SIDE-MOUNTED HOT AND COLD RECIRCULATING TAPS

• Allows Vertex to be installed as part of combination space heating/water heating applications or any system requiring a recirculating hot water loop, including radiant floor heating

INTELLI-VENT™ GAS CONTROL

• Equipped with nearly indestructible silicon nitride hot surface ignitor —

no standing pilot

• Advanced electronics for more precise control of water temperature and easy

to understand system diagnostics

COMMERCIAL GRADE GLASS LINING

• A. O. Smith PermaGlas

against corrosion

• Protects all interior tank surfaces including inside and outside of helical

heat exchanger

TWO HEAVY-DUTY ANODE RODS

• Provide even more protection against corrosion

GREEN CHOICE® GAS BURNER

• Patented “eco-friendly” design reduces NOx emissions by up to 33%

and complies with Southern California and Texas requirements

Ultra Coat™ process provides superior protection

GAS-FIRED

FACTORY-INSTALLED TEMPERATURE AND PRESSURE RELIEF VALVE

MAXIMUM HYDROSTATIC WORKING PRESSURE : 150 PSI

* 3.07 GPM continuous flow, based on 65ºF inlet water temperature, 110º outlet temperature.

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RESIDENTIAL

™

VERTEX

90% THERMAL EFFICIENCY POWER-VENT

Gas Water Heaters

CODES AND STANDARDS

• Design-certiﬁed by UL (Underwriters Laboratories) according to ANS Z21.10.3

• Meets or exceeds ASHRAE/IESNA 90.1-1999 and 2004 NAECA

SIX-YEAR LIMITED TANK AND PARTS WARRANTY

• For complete warranty details, consult written warranty shipped with heater or contact A. O. Smith

BTU

MODEL

NUMBER

GPHE-50

* Natural gas only

DIMENSIONS IN INCHES

GPHE-50

Inlet and outlet connections: 3/4" male Circulation loop connections: 3/4" female

INPUT

PER

HOUR

76,000

70-5/8

OUTLET

(A)

GALLON

CAPACITY

AMODEL

68-1/4

(L)

DELIVERY

GALLONS

T & P VALVE

(G)

DIAMETER

SIDE INLET

FIRST HOUR

127

RECOVERY

90°F RISE

GALLONS

PER HOUR

INLET

(L)

SIDE OUTLET

(C)

SHIPPING

WEIGHT

LBS

210

9-1/8

(B)

ANODE

(J)

HOT

(H)

COLD

TOP VIEW

15-3/4

(K)

THERMOSTAT

DRAIN VALV E

(F)

FRONT VIEW

(D)

(E)

www.hotwater.com

A. O. Smith Corporation 500 Tennessee Waltz Parkway, Ashland City, TN 37015

* INSTALL IN ACCORDANCE WITH LOCAL CODES

For Technical Information and Automated Fax Service, call 800-527-1953.

A. O. Smith reserves the right to make product changes or improvements without prior notice.

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