CHG Site Glass & Burner

The ﬂame can be continuously modulated from an orange glow to a full blue ﬂame.

The burner is located on the top of the heat engine forcing the heat down while the water ﬂows upward. This allows the condensation to drain down and away from the boiler.

Cutaway view showing actual water ﬂow path.

Supply

Manifold

Return

Manifold

Negative regulated gas valve with factory set outlet pressure.

Venturi

Variable

Speed

Blower

Boiler Operations

The CHG castings incorporate a multi-pass water ﬂow with the return water entering the lower manifold and progressing upward to the sup- ply manifold. This counterﬂow from bottom to top provides for maximum heat transfer while the serpentine pattern offers low pressure drop. Each section’s water ﬂow is independent with no port connections between sections. The supply and return manifolds are designed to balance the ﬂow across all sections.

Premix Technology

CHG boilers utilize a pre-mix combustion assem- bly that includes a modulating gas valve, vari- able speed blower and a venturi to provide an optimal fuel/air mixture to a stainless steel mesh burner. Together these components accurately and efﬁciently help control the fully modulating combustion process which automatically adjusts the boiler’s ﬁring rate to match your heating needs.

Domestic Hot Water

Abundant domestic hot water is available with a matching Alliance indirect-ﬁred hot water heater. Select from several sizes to meet your speciﬁc needs. In addition, the CHG boiler control module

is preset for domestic hot water priority and set point temperature.


Boiler	Horizontal	Vertical	Vent
Model	Vent Max.	Vent Max.	Diameter

CHG150	55 ft.	49.5 ft.	3 in.

CHG225	55 ft.	47 ft.	4 in.

Boiler Control Module & Outdoor Reset

The MCBA microprocessor control manages all boiler functions including supervising the com- bustion process and monitoring key operating functions. Included is a digital display that can provide detailed boiler information as well as be an invaluable service and troubleshooting tool.

The MCBA module stores set points for boiler and domestic hot water supply temperatures, and monitors supply and return water tempera- tures, ﬂue gas temperature, the ﬂame sensor, and the included outdoor reset. The boiler con- trol module allows for continuous modulation (ﬁring rates) by varying the combustion fan speed.

CHG Venting

The CHG incorporates a sealed combustion system that uses outside air for combustion and the safe and proven AL29-4C stainless steel ma- terial for venting the exhaust. Both horizontal (“sidewall”) and vertical (“through-the-roof”) venting options are available.

`A' `B' `C' `D' `E specifications

Burnham boilers are renowned for their innovative engineering, durability, and efficiency. The Burnham line consists of several models, primarily categorized as A, B, C, D, and E, each designed to meet different heating needs while maintaining high performance.

Model A is known for its cast iron construction, which not only provides durability but also contributes to efficient heat retention. This model is suitable for residential and light commercial applications, making it versatile for various settings. It often features a high-efficiency burner system that enhances fuel utilization and reduces energy costs.

Model B steps up with advanced technology designed for mid-range commercial applications. It incorporates a robust heat exchange system that maximizes thermal efficiency. The Burnham B is often equipped with commensurate control systems that allow users to easily monitor and adjust performance settings, promoting operational efficiency.

Model C takes innovation a step further with features aimed at reducing emissions. This model utilizes cutting-edge combustion technology that minimizes environmental impact without compromising performance. Its advanced design makes it an ideal choice for environmentally conscious users seeking compliance with stricter sustainability standards.

Model D is recognized for its high capacity and flexibility, making it perfect for larger commercial settings. This model comes with multi-fuel capabilities, allowing users to switch between natural gas, propane, and oil without significant modifications. The D model also emphasizes easy maintenance, with access points strategically placed for routine servicing.

Lastly, Model E is engineered for efficiency and ease of installation. This model incorporates a lightweight design and modular assembly, which simplifies transportation and setup. Furthermore, it boasts a smart control interface that provides real-time feedback, helping users optimize their heating solutions dynamically.

Overall, Burnham A, B, C, D, and E models are crafted with a focus on reliability, user-friendliness, and sustainability. Each model addresses specific heating requirements, offering versatility across residential, commercial, and industrial applications. As a result, Burnham stands as a trusted name in the boiler industry, merging traditional craftsmanship with modern technology to deliver exceptional heating solutions.