— CGs boilers only

UserísInformationManual

❏Check monthly . . . . . . . . . . . . . . . .

Automatic air vents (if used)

Main burner flame

1. See Figure 4.

 

Proper main burner flame (see Figure 6):

 

 

2.Remove the cap from any automatic air vent in the system and check operation by depressing valve B slightly with the tip of a screwdriver.

3.If the air vent valve appears to be working freely and not leaking, replace cap A, twisting all the way on.

4.Loosen cap A one turn to allow vent to operate.

5.Have vent replaced if it does not operate correctly.

Figure 4 Automatic air vent

A

B

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1. Yellow-orange streaks may appear (caused by dust).

Improper main burner flame:

1.Overfired — Large flames.

2.Underfired — Small flames.

3.Lack of primary air — Yellow tipping on flames (sooting will occur).

Figure 6 Main burner flame, typical

Pilot burner flame

Proper pilot flame (see Figure 5):

1.Blue flame.

2.Inner cone engulfing thermocouple (standing pilot) or pilot flame sensor (spark-ignited pilot).

3.Thermocouple or pilot flame sensor glowing cherry red.

Improper pilot flame:

1.Overfired — Large flame lifting or blowing past pilot flame sensor.

2.Underfired — Small flame. Inner cone not engulfing pilot flame sensor.

3.Lack of primary air — Yellow flame tip.

4.Incorrectly heated pilot flame sensor.

Figure 5 Pilot burner and flame, typical

Inner

Sparkcone electrode

Pilot flame sensor (spark- ignited pilots)

— or —

Thermocouple (standing pilots)

Transparent blue flame

Inner flame

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Clean vent termination & air intake screens

1.Remove all lint and debris from both the boiler air intake screen and the flue discharge screen.

The boiler control module will sense blockage of the air intake or flue and lockout if the blockage is excessive. It will signal the failure by flashing the appropriate indicator lights on the control board.

2.If removing the debris does not allow the boiler to operate correctly afterwards, contact your qualified service technician to inspect the boiler and vent/ air systems.

Check condensate drain system

1.Inspect condensate drain fittings and tubing. Verify that condensate can flow freely to drain.

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Part Number 550-110-592/1099

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Weil-McLain CGa manual Automatic air vents if used Main burner flame, Pilot burner flame, Check condensate drain system
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CGa specifications

The Weil-McLain CGa is a highly efficient and reliable gas-fired boiler that has established itself as a favorite among homeowners and HVAC professionals alike. Known for its impressive performance and durability, the CGa series is designed to deliver comfort while optimizing energy consumption.

One of the main features of the Weil-McLain CGa is its efficiency. With an AFUE (Annual Fuel Utilization Efficiency) rating of up to 84%, this boiler efficiently converts gas into heat, ensuring minimal energy waste. This efficiency not only translates to cost savings on energy bills but also supports environmental sustainability through reduced emissions.

The CGa boilers are designed for versatility, capable of being used in various applications, including residential heating systems and light commercial settings. With a range of models available, the CGa can meet different heating demands, ensuring consistent comfort regardless of the building size or layout.

The boiler's built-in heating capabilities include the option for either hot water or steam heating, adding to its versatility. Weil-McLain offers multiple BTU outputs across the CGa series, allowing for a customized solution based on specific heating requirements.

State-of-the-art technologies are evident in the CGa's design. The integrated hot surface ignition system enhances start-up reliability, minimizing the risk of combustion issues and ensuring safe operation. Additionally, the unit features a standard draft diverter for efficient venting, allowing for optimal exhaust management within the heating system.

Durability is another key characteristic of the Weil-McLain CGa. Constructed from high-quality materials, these boilers are engineered to withstand the rigors of daily operation. The cast iron heat exchanger provides superior heat retention and longevity, ensuring that the system remains operational for years with proper maintenance.

Installation of the CGa boiler is straightforward due to its compact design and versatile venting options, which can accommodate various installation configurations. This ease of installation combined with a user-friendly interface allows homeowners and technicians alike to manage the system with minimal hassle.

In summary, the Weil-McLain CGa boiler epitomizes efficiency, durability, and versatility. Its advanced technologies and robust construction make it a top choice for those seeking a reliable heating solution for their homes or commercial spaces. With Weil-McLain's commitment to quality and innovation, the CGa series delivers performance that meets the diverse needs of today's heating applications.
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