AO Smith SMIGCR30LP, SMIGCR40LP Specifications

ATMOSPHERIC VENT

Residential Gas
Water Heaters

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.

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.

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/IENSA

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 ENERGY FACTORS

• Eco-Friendly non-CFC foam insulation,
external heat traps and specially designed
combustion chamber combine to produce a
high Energy Factor 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.

6-YEAR LIMITED TANK AND PARTS
WARRANTY

• For complete information, consult written
warranty or go to hotwater.com

©2015 A. O. Smith Corporation. All rights reserved.

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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AOSRG47000

Residential Gas
Water Heaters

Model Number

Tall Models

†GCB-30 30 64 0.63 35,500 32,000 37 61-1/2 58 16 12-1/4 8 51-3/4 N/A N/A 3 or 4 123

GCR-30 30 67 0.63 35,500 32,000 37 61-1/2 58 18 12-1/4 8 51-3/4 N/A N/A 3 or 4 132

‡GCRH-40 40 67 0.62 35,500 N/A 38 61-3/4 58-1/4 20 12-1/4 8 52 N/A N/A 3 or 4 138

†GCB-40 40 70 0.62 40,000 36,000 42 61-3/4 58-1/4 18 12-1/4 8 52 N/A N/A 3 or 4 130

GCR-40* 40 70 0.62 40,000 36,000 42 61-3/4 58-1/4 20 12-1/4 8 52 14-1/4 51-3/4 3 or 4 138

GCG-50* 50 88 0.60 40,000 37,000 41 60-3/4 57-1/4 21 12-1/4 8 50 1/2 14-1/4 50-1/2 3 or 4 148

GCR-50* 50 88 0.62 40,000 37,000 43 60-3/4 57-1/4 22 12-1/4 8 50-1/2 14-1/4 50-1/2 3 or 4 165

GCRT-50* 50 92 0.60 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

†GCRX-50* 50 98 0.60 60,000 54,000 65 65-1/2 61 22 13-1/2 8 54-1/4 14-1/4 50-1/4 4 190

Short Models

†GCBL-30 30 56 0.63 35,500 32,000 37 50 46-1/2 18 12 8 40 N/A N/A 3 or 4 110

GCRL-30 30 62 0.63 35,500 32,000 37 50 46-1/2 20 12 8 40 N/A N/A 3 or 4 118

†GCBL-40 40 67 0.62 40,000 36,000 41 51-1/2 48 20 12 8 41-1/4 N/A N/A 3 or 4 134

GCRL-40 40 68 0.62 40,000 36,000 41 51-1/2 48 22 12 8 41-1/4 N/A N/A 3 or 4 135

GCRL-50 50 93 0.60 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
†Models ship with supplied insulation blanket.
For 10-year tank and 6-year parts warranty, change “G” to “X” in model number (example: XCR-30).

‡ LP models not available on GCRH-40.

*For optional side-mounted recirculating taps, add “L” to the suffix (example: GCR-40L).
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.

Gallon

Capacity

First

Hour
Rating
Gallon

Energy

Factor

BTU Input

Natural

Gas

BTU Input

Propane

Gas

FLAMMABLE VAPOR IGNITION RESISTANT (FVIR) WATER HEATERS

Recovery
90°F Rise

Gallon Per

Hour

Dimensions in Inches

A B C D E F *G *H

ANODE ROD

(OPTIONAL T&P

LOCATION)

HOT

CONNECTION

(ANODE OUTLET

ON T&P MODELS)

E
C

Draft
Hood

COLD
CONNECTION

Approx.

Shipping

Weight (lbs)

A. O. Smith FVIR design meets the American National Standards Institute standards
(ANSIZ21.10.1-CSA 4.1) that deal with the 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) device, is designed to shut off gas flow
to the burner and pilot if poor combustion is detected.

T&P VALVE

1/2" GAS
CONNECTION

F

B

H

A

D

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

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