A.O. Smith GCB-30, GCR-30, GCRH-40, GCB-40, GCR-40 User Manual

...

PROLINE® ATMOSPHERIC VENT

COMMERCIAL-GRADE RESIDENTIAL

COMMERCIAL-GRADE

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/ 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 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

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

Page 1 of 2

AOSRG47000

COLD CONNECTION

HOT

CONNECTION

(ANODE OUTLET

ON T&P MODELS)

ANODE ROD

(OPTIONAL T&P

LOCATION)

COMMERCIAL-GRADE

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 54-1/4 4 182 GCRX-55* 55 106 0.59 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 †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

Recovery 90°F Rise

Gallon Per

Hour

Dimensions in Inches Approx.

A B C D E F *G *H

Draft Hood

Shipping

Weight

(lbs)

T&P VALVE

1/2" GAS CONNECTION

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

Maximum Hydrostatic Working Pressure: 150 PSI

FLAMMABLE VAPOR IGNITION RESISTANT (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 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.