A. O. Smith GCF-40 User Manual

Residential Gas Water Heaters

HIGH EFFICIENCY RESIDENTIAL MODELS

FEATURES

ENERGY STAR

■ Meets ENERGY STAR requirements for the .67 EF tier II efficiency increase

initiated September 1, 2010 and is eligible for most utility rebate programs based on Energy Factor (EF) Ratings.

AUTOMATIC FLUE DAMPER

■ Increases efficiency as it auto-matically opens and closes to reduce heat loss in the

standby mode.

ELECTRONIC GAS CONTROL

■ Intelligent control logic provides enhanced operating paramet

differentials for precise sensing and faster heating response to optimize performance.

DIAGNOSTICS

■ The electronic gas control incorporates an LED status indicator that monitors system

operation and service diagnostics.

ELECTRONIC IGNITION

■ Heater operates with an automatic pilot relight system that shuts off the pilot during

stand-by modes to reduce gas consumption and eliminates nuisance pilot outage issues associated with standing pilot models.

POWER REQUIREMENTS

■ Plugs into standard 110/120v outlet (10 foot power cord included).

DYNACLEAN™ DIFFUSER DIP TUBE

■ Helps reduce lime and sediment buildup, maximize hot water output. Made from

long-lasting PEX cross-linked polymer.

GREEN CHOICE

■ Patented “Eco-Friendly” design reduces Low NOx emissions by up to 33% and meets

less than 40 ng/j requirements for Low NOx.

COREGARD™ ANODE ROD

■ An A. O. Smith exclusive. Anode has stainless steel core, protects tank against corrosion

longer than ordinary steel anodes.

DURABLE, BRASS TAMPER-RESISTANT DRAIN VALVE

BLUE DIAMOND® GLASS COATING

■ A. O. Smith BLUE DIAMOND

CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE

■ Top-mounted T&P Relief Valve available as option on all models.

CODE COMPLIANCE

■ UBC, CEC, SBCC, HUD and BOCA National Codes. Meets the thermal efficiency and

standby loss requirements of the U. S. Department of current edition of ASHRAE/IESNA 90.1. Meets the Federal Energy Efficiency Standards effective January 20, 2004, according to the National Appliance Energy Conservation Act (NAECA) of 1992.

DESIGN-CERTIFIED BY CSA INTERNATIONAL

■ According to ANSI Z21.10.1 - 4.1 CSA Standards governing storage-type water heaters.

QUALIFIED

GAS BURNER

ers and tighter

process provides superior protection against corrosion

Energy and

FLAMMABLE VAPOR IGNITION RESISTANT COMPLIANT DESIGN

6-YEAR LIMITED TANK AND PARTS WARRANTY

■ For complete information, consult written war

Revised April 2013

rant

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AOSRG45250

Residential Gas Water Heaters

RESIDENTIAL GAS MODELS

FIRST

ENERGY

MODEL

NUMBER

SERIES

HOUR

RATING

GALLONS

FACTOR

(EF)

GALLON

CAPACITY

TALL MODELS

GCF-40 100 67

GCF-50 100 81

.67 40 40,000 42 2 64-1/4 58-1/4 20 13 8 51-3/4 3 or 4 152

.67 50 40,000 42 2 63-1/2 57-1/4 22 13 8 50-1/4 3 or 4 167

SHORT MODEL

GCFL-40 100 67

GCFL-50 100 86

Recovery capacity based on actual performance tests. Water Connections - 3/4” on all models. External heat trap nipples are factory-installed on all models Order SMR S45 for Top T&P - Example GCF-40 S45 All models are ENERGY STAR A

ll models are certified from sea level to 10,100 ft. elevations *Propane (LP) gas - 37,000 BTU input for 50-gallon tall models and 36,000 BTU for 40-gallon models 50-gallon short model, not available in LP gas

qualified.

.67 40 40,000 42 2 54 47-3/4 22 13 8 41 3 or 4 149

.67 50 40,000 42 2

BTU

INPUT

PER

HOUR

NATURAL*

ANODE ROD*

RECOVERY

90°F RISE

GALLONS

PER HOUR

FOAM

THICKNESS

(INCHES)

DIMENSIONS IN INCHES

A B C D E F

55-3/4

49-1/2

13-1/4

42-1/2

DRAFT

HOOD

OUTLET

APPROX.

SHIPPING

WEIGHT

(LBS)

3 or 4 175

HOT

CONNECTION

T&P VALVE

1/2" GAS CONNECTION

COLD CONNECTION

* Location for optional top-mounted T&P Valve if ordered from factory.

Maximum Hydrostatic Working Pressure: 150 PSI.

For Technical Information call 1-800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

Revised April 2013

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www.hotwater.com AOSRG45250