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GB300 BOILER INSTALLATION AND OPERATION INSTRUCTIONS

Figure 100

Gas Supply Piping

 

TO GAS SUPPLY

MANUAL

PILOT SHUTOFF VALVE

 

SHUTOFF

GAS PRESSURE

VALVE

TEST TAPPING

 

 

PILOT FILTER

 

PILOT GAS PRESSURE

 

REGGULATOR

ELECTRICAL WIRING

Electrical Power Connections

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation! Verify proper operation after servicing.

The electrical connections to this boiler must be made in accordance with all applicable local codes and the latest revision of the National Electrical Code, ANSI/

INSTALL MANUAL SHUTOFF VALVE 5FT. ABOVE FLOOR WHERE REQUIRED BY LOCAL CODES.

TO PILOT(S)

GROUND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

JOINT

 

 

 

 

 

 

 

 

 

 

UNION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO GAS

CONTROL(S)

SEDIMENT TRAP & DRIP LEG ( TO EXTEND TO FLOOR )

NFPA-70. Installation should also conform with CSA C22.1 Canadian Electrical Code Part I if installed in Canada. Install a separate 120 volt 15 amp circuit for the boiler. A shut-off switch should be located at the boiler. The boiler must be grounded in accordance with the authority having jurisdiction, or if none, the latest revision of the National Electrical Code, ANSI/NFPA-70.

When applicable, provisions for vent, bleed and gas relief lines must be made in accordance with the latest revision of ANSI Z223.1.

Safe lighting and other performance criteria were met with the gas manifold and control assembly provided on the boiler. All gas connections MUST be leak tested before putting the boiler into operation.

WARNING: Never use an open flame to test for gas leaks. Always use an approved leak detection method. Failure to comply with this warning can cause extensive property damage, severe personal injury or death!

Whenever the gas supply piping is pressure tested the boiler gas controls must be protected. If the test pressure is equal to, or less than 1/2 psig (3.5 kPa) isolate the boiler by closing it's manual shut off valve. If the test pressure is greater than, or equal to 1/2 psig (3.5 kPa), disconnect the boiler and its individual shut- off valve.

Line voltage field wiring of any controls or other devices must conform to the temperature limitation of type T wire at 95°F(35°C) above room temperature. Use copper conductors with a minimum size of #14 awg.

The incoming line voltage is connected to the boiler using the supplied junction box and transformer. All high voltage connections must be contained inside the junction box leaving only 24 volt termination exposed. The junction box MUST be located on the side were the boiler controls are located and on the jacket panel in the upper right hand corner (1/2" max from the top and 1/2" max from the front side of the jacket panel). Failure to mount the junction box and transformer in this area will cause wire harness length to not be of the proper size, resulting in the inability to connect the termination points and harnesses together. See Figure 101 Transformer Location.

Figure 101

Transformer Location

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Smith Cast Iron Boilers GB300 Electrical Wiring, Gas Supply Piping, Electrical Power Connections, Transformer Location
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GB300 specifications

The Smith Cast Iron Boilers GB300 series is renowned for its robust construction and exceptional performance, making it a preferred choice for commercial and industrial applications. This line of boilers is designed to provide reliable and efficient heating solutions for a variety of facilities, including schools, hospitals, and manufacturing plants.

One of the standout features of the GB300 series is its durable cast iron construction. Built to withstand the demands of heavy-duty operation, the cast iron material ensures longevity and resilience against thermal cycling stresses. This design not only enhances the boiler's lifespan but also ensures that it maintains optimal performance over time, even in rigorous conditions.

The GB300 series is equipped with advanced technologies that contribute to its efficiency and ease of use. For instance, the boilers incorporate a flexible firing system that allows for a range of firing rates. This adaptability ensures that the boiler can efficiently meet varying heating loads. Additionally, the use of a multi-pass heat exchanger design maximizes heat transfer, significantly improving overall efficiency and reducing fuel consumption.

Another key characteristic of the GB300 boilers is the user-friendly control system. The integrated control panel provides operators with real-time monitoring and management capabilities, allowing for precise adjustment of temperature and pressure settings. This feature not only enhances operational efficiency but also aids in maintaining safety standards.

The GB300 series also emphasizes safety, featuring multiple levels of protection, including low water cut-off, high-pressure switches, and safety valves. These safety mechanisms ensure reliable operation and minimize the risk of operational hazards, providing peace of mind for operators and facility managers.

Versatility is another remarkable attribute of the Smith Cast Iron Boilers GB300 series. These boilers can be used in various configurations, whether as a standalone unit or as part of a more extensive heating system. This flexibility makes the GB300 series suitable for diverse applications and facility sizes.

In summary, the Smith Cast Iron Boilers GB300 series is a powerful heating solution that combines durability, efficiency, and advanced technology. Its robust cast iron construction, flexible firing capabilities, and comprehensive safety features make it an ideal choice for those seeking reliable heating systems in demanding environments. The GB300 series stands out as a testament to Smith's commitment to quality and innovation in the boiler industry.
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