A.O. Smith 500, GB/GW-300, 750 SERIES, 650 warranty Series 400, 401, 402, 403, 404, 14-18

Page 1

GAS-FIRED COMMERCIAL

 

COPPER BOILERS FOR HYDRONIC

USER'S INFORMATION MANUAL

HEATING AND HOT WATER SUPPLY

 

 

GB/GW-300, 400, 500, 650, 750

 

SERIES 400, 401, 402, 403, 404, 405,

 

2-STAGE UNITS

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

—Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

—WHAT TO DO IF YOU SMELL GAS:

•Do not try to light any appliance.

•Do not touch any electrical switch; do not use any phone in your building.

•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

•If you cannot reach your gas supplier, call the fire department.

—Installation and service must be performed by a qualified installer, service agency or the gas supplier.

WARNING

Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas supply at a location external to the appliance.

WARNING

Do not use this boiler if any part has been under water. Immediately call a qualified service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water.

INDEX

PAGE

LIGHTING INSTRUCTIONS

2-3

MAINTENANCE

3-4

OPERATING SEQUENCE, EMC5000

8-14

CONNECTION DIAGRAM

13

EMC5000 INSTRUCTIONS

14-18

WARRANTY

19

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.

A DIVISION OFA. O. SMITH CORPORATION

MC BEE, SC., RENTON, WA.,

STRATFORD-ONTARIO, VELDHOVEN-THE NETHERLANDS

www.hotwater.com

 

PLEASE KEEP THESE INSTRUCTIONS ADJACENT TO BOILER AND

 

NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

PRINTED IN U.S.A. 0306

PART NO. 212132-001

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Contents 14-18 Series 400, 401, 402, 403, 404Lighting Instructions for the GB/W 300 through 750 models Risk of Scalds Lighting InstructionsInputs To CCB and FCB Burner SystemCCB Drawing #211758 FCB Drawing #211759 PDB Drawing #211760 Line Polarity Indicator & Fuse Protection CCB/FCB Indicator Lamps & FusesOutputs from CCB and FCBs IgnitersGB/LB FCB Eight position DipswitchUIM Operating Procedures Temperature Setpoints System Control AlgorithmStages 1 and 2 will turn on in sequence from 1 to Description of CCB control states Idle State Description of FCB control statesOperating Differential Setpoint Operating SetpointConnection Diagram Drawing #211769 Page UIM Touch Switches Hard Fault Displayed Description Red LED LockoutSoft See below Other troubleshooting hints Page Page Page NEW Boiler Limited Warranty

500, 750 SERIES, 650, GB/GW-300 specifications

The A.O. Smith GB/GW-300, 650, 750 Series, and 500 represent a cutting-edge line of commercial water heaters designed to meet the diverse needs of various applications. These models are highly regarded for their advanced features, robust construction, and reliable performance, making them ideal for businesses such as restaurants, hotels, and industrial facilities.

One of the main features of the A.O. Smith GB/GW series is its high-efficiency design. These water heaters are built with advanced insulation and heat exchanger technology, which contribute to reduced energy consumption and lower operating costs. The products achieve notable energy efficiency ratings, ensuring that businesses can maintain their hot water supply without incurring excessive utility bills.

The GB/GW series also incorporates a user-friendly digital control system. This technology allows operators to monitor and adjust settings easily, providing real-time feedback on temperature and energy consumption. This level of control enhances operational efficiency and ensures hot water is always available when needed.

Another significant characteristic of the A.O. Smith GB/GW series is its durable construction. The units are designed with high-quality materials that resist corrosion and wear, extending their operational lifespan. The stainless steel tanks and heat exchangers are engineered to withstand high temperatures and pressure, making them reliable even in demanding environments.

Moreover, safety features are paramount in the design of these water heaters. The series includes multiple safety mechanisms, such as high-temperature limit switches and pressure relief valves, ensuring the safe operation of the unit at all times. This not only protects the equipment but also guarantees the safety of personnel using hot water.

The GB/GW series ranges in capacity, accommodating different sizes of operations. From the compact and efficient 300 model to the larger 650 and 750 units, the series offers flexibility to suit various demands. The 500 model strikes a balance between capacity and efficiency, making it a popular choice for medium-sized establishments.

In summary, the A.O. Smith GB/GW-300, 650, 750 Series, and 500 are exemplary choices for commercial water heating solutions. Their combination of efficiency, advanced technology, durable design, and comprehensive safety features ensures that businesses have access to reliable hot water, ultimately supporting their operational needs and enhancing service delivery.
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