Safety Control Operation - Standing Pilot and Intermittent Ignition

Hydrolevel CG400A Low Water Cut-off - Interrupts burner operation if the water in the boiler drops below a safe level. As the water drops past the cut-off point, the amber lamp on the CG400 will glow. The CG400 will interrupt power to the burners 15 seconds after the water level drops past the cut-off point. This feature prevents short cycling of the burners due to a bouncing water line. The burners will then remain off until 30 seconds after the water level has been raised above the cut-off point.

The CG400 is also equipped with a feature which will shut down the burners after they have been firing for 10 minutes, regardless of the water level status. The CG400 then keeps the burners off for 90 seconds, allowing the water level and any foam which is present to settle. During this 90 second interval, the green LED on the CG400 will glow. If the water level is still above the cut-off line at the end of this 90 second interval, the CG400 will restart the burners.

The vent damper will close when the low water cut-off interrupts burner operation.

McDonnell & Miller #67 Low Water Cut-off - Interrupts burner operation if the water in the boiler drops below a safe level. Burner operation is restored when the water level in the boiler is raised above the cut-off point.

The vent damper will close when the low water cut-off interrupts burner operation.

Pressure Limit Control - Interrupts burner operation when the pressure in the boiler exceeds the “Cut-in” setting plus the differential setting. The “Cut-in” setting is shown on the outside of the control and is adjusted using the screw on the top of the control. The differential is adjusted using the white thumb wheel on the inside of the control. Burner operation is restored when the pressure in the boiler drops to the “Cut-in” pressure.

The vent damper will close when the pressure limit control interrupts burner operation.

VENT DAMPER (NOTE 2)

NOTE 3

“BURNER”

“BURNER”

LESS VENT

DAMPER

HONEYWELL VR8204/VR8304

SERIES GAS VALVES (BSI069 - 345)

TH

TR

ROBERTSHAW

+7000DERHC

GAS VALVE (BSI379)

2. VENT DAMPER REQUIRED ON BSI069 - BSI276, OPTIONAL ON BSI310 - BSI379

3. ON BOILERS LESS VENT DAMPER, DAMPER HARNESS NOT USED. RED AND BLUE LEADS ARE JUMPED TOGETHER USING RED JUMPER WIRE.

FIGURE18: WIRINGDIAGRAM,INTERMITTENTIGNITIONANDHYDROLEVELCG-400ALOWWATERCUTOFF

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Crown Boiler BSI345, BSI241, BSI276, BSI103, BSI138, BSI172, BSI069, BSI207, BSI310 installation instructions GAS Valve BSI379
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BSI069, BSI345, BSI207, BSI172, BSI241 specifications

Crown Boiler Company is renowned for its high-quality heating solutions, with a diverse range of models designed to meet various residential and commercial needs. Among their popular offerings are the BSI series, which includes the BSI379, BSI138, BSI310, BSI276, and BSI103 models. Each of these boilers comes with distinct features, technologies, and characteristics that cater to different applications and preferences.

The Crown Boiler BSI379 is a powerful and efficient boiler designed for residential use. It features a stainless steel heat exchanger that enhances durability and improves heat transfer efficiency. The BSI379 operates on natural gas, providing a high thermal efficiency rating which helps to reduce energy costs. With a compact design, it can fit conveniently in various installations, making it a versatile choice for homeowners.

The BSI138 model is another excellent option for smaller residential spaces. It is equipped with advanced technology that allows for quiet operation and minimal environmental impact. This boiler also offers a straightforward control interface, making it easy for homeowners to adjust settings according to their heating needs. The BSI138's lightweight construction and small footprint allow for flexible installation options.

Moving on to the BSI310, this model is designed for medium to larger-sized homes. It features an electronic ignition system that ensures reliable start-up while minimizing gas consumption. The BSI310 also incorporates multiple safety features, including pressure relief valves and limit controls, enhancing user safety during operation. Its robust design ensures efficient heating even in the coldest months.

The BSI276 model is characterized by its sealed combustion design, which improves indoor air quality by preventing drafts and ensuring that all combustion air is drawn from outside. This model is ideal for energy-conscious homeowners seeking environmentally friendly options. Its high-efficiency rating translates to significant energy savings over time, making it a financially wise investment.

Finally, the BSI103 is an entry-level model that retains the quality and reliability associated with Crown Boilers. It is particularly suited for smaller homes or apartments and offers ease of use and maintenance. The BSI103 combines affordability with efficiency, providing a cost-effective heating solution without compromising on performance.

In summary, the Crown Boiler BSI series, comprising the BSI379, BSI138, BSI310, BSI276, and BSI103, showcases a blend of innovative technologies and features. With options suitable for various household sizes and energy needs, Crown Boiler continues to deliver reliable heating solutions that cater to modern homeowners’ demands for efficiency, safety, and convenience. Each model's unique characteristics ensure that users can find the perfect boiler to meet their heating requirements.
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