Answer:

New Rating

=297 gal/hr x (180,000 BTU/h)/(220,000 BTU/h)

=297 gal/hr x 0.818 = 243 gal/hr

NOTICE

Increasing the boiler DOE heating capacity above the values listed in Table 3 will not increase the rating of the water heater.

Ratings are based on 200°F boiler water. If 180°F boiler water is supplied, First Hour and Continuous Draw ratings will be reduced by approximately 27%.

2.Circulator Sizing – Refer to Table 4 for the corresponding pressure drop through the coil for the given model. Calculate the pressure drop of all straight pipe and fittings on the supply and return of the water heater at the selected flow rate. Add the piping/fitting pressure drop to the pressure drop through the water heater coil.

Select a circulator that will provide an appropriate flow rate at the combined pressure drop.

SYSTEM ZONE CONTROL

The Single-wall Indirect water heater must be installed as a zone separate from the space heating system. The domestic hot water zone’s piping and circulator must be sized for a minimum flow rate with all zones in use and a maximum flow rate with only the water

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Bradford-White Corp GX1-55S, GX2-25S manual System Zone Control
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GX1-55S, GX2-25S specifications

Bradford-White Corporation is a well-established leader in the water heating and storage industry, renowned for its commitment to quality and innovation. Among its extensive lineup, two standout models are the GX2-25S and the GX1-55S, each designed to meet diverse residential and commercial needs.

The Bradford-White GX2-25S is a compact yet powerful gas water heater, featuring a 25-gallon capacity. It is ideal for households that need a reliable water supply without taking up excessive space. With its high-efficiency design, this model utilizes a robust combustion system to deliver rapid heating, ensuring that hot water is readily available when needed. The GX2-25S is also equipped with an innovative Hydrojet® total performance system, which minimizes sediment buildup, enhancing overall efficiency and prolonging the lifespan of the unit.

On the other hand, the GX1-55S is tailored for larger households or commercial applications, boasting a substantial 55-gallon capacity. This model is designed to meet higher demand, ensuring that multiple fixtures can be used simultaneously without compromising performance. Similar to its smaller counterpart, the GX1-55S features Bradford-White's patented Defender Safety System®, a crucial technology that enhances safety by monitoring combustion and preventing potentially dangerous scenarios, making it ideal for homes with kids or pets.

Both models are constructed with Bradford-White's renowned tank design, incorporating high-quality glass lining that offers superior protection against corrosion. This allows for improved durability and fewer maintenance concerns over the years. The insulation surrounding the tank is also advanced, providing energy savings by minimizing heat loss and ensuring that hot water is retained longer.

Additionally, both the GX2-25S and GX1-55S are designed for easy installation and maintenance. Their strategic design allows for accessibility to critical components, making servicing less of a hassle for homeowners or professionals alike.

In summary, both the Bradford-White GX2-25S and GX1-55S models exemplify the brand's dedication to quality and innovation. With a range of features like efficient heating systems, robust safety mechanisms, and durable construction, they cater to varying hot water needs while ensuring reliability and performance. Whether for residential or commercial use, these models stand out as robust solutions in the water heating market.
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