GOLD CGi-4E Gas-Fired Water Boiler — Boiler Manual

9a Operation — sequence

1.Read Operating instructions on page 41. This information is also located on a label on the inside of the boiler jacket door panel.

2.Raise room thermostat to call for heat.

3.Circulator energizes. If limit circuit is closed, the inducer starts. After pressure switch proves proper airflow, control module initiates 30-second prepurge.

4.Control module sparks the pilot and opens pilot valve in main gas valve.

a.If pilot does not light within 15 seconds, pilot valve is closed and spark generator is turned off. Control module initiates a

15-second postpurge, then starts a new cycle.

b.If pilot does light and control module senses flame current, spark generator is turned off and main valve opens.

5.The CGi-4E timer relay delays high fire for the first 60 seconds of main flame.

6.During main burner operation:

a.Control module monitors pilot flame current. If signal is lost, main valve closes, spark generator activates and sequence returns to step 4.

b.If power is interrupted, control system shuts off pilot and main gas valves and restarts at step 1 when power is restored.

7.In the event the limit control shuts down the boiler — The control module closes the pilot and main gas valves, but keeps the inducer operating for 15-second postpurge.

— The circulator continues to operate.

8.Lower room thermostat setting to stop call for heat. Ther- mostat is satisfied — Pilot and main gas valves are closed

— Inducer operates for 15-second postpurge — Circulator is shut off.

9.Boiler is now in the off cycle.

10.Repeat steps 1 through 6 several times to verify operation.

11.Return the thermostat to normal setting.

12.Set thermostat heat anticipator setting as instructed in Figure 31, page 40.

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Part Number 550-110-711/1108

 

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Weil-McLain CGI-4E manual 9a Operation sequence, Boiler is now in the off cycle

CGI-4E specifications

The Weil-McLain CGI-4E is a standout in the realm of commercial boilers, designed to meet the rigorous demands of a variety of heating applications. This gas-fired cast iron boiler exemplifies durability, efficiency, and performance, making it a popular choice in various commercial settings, including schools, hospitals, and office buildings.

One of the main features of the CGI-4E is its cast iron construction. Cast iron has long been favored for its excellent heat retention and distribution capabilities, leading to improved overall efficiency. The boiler is designed to maximize heat output while minimizing energy consumption. This characteristic is especially beneficial for businesses seeking to lower their energy costs without sacrificing comfort.

In terms of efficiency, the Weil-McLain CGI-4E boasts an impressive thermal efficiency rating. Its design incorporates advanced technology, allowing it to achieve an AFUE rating of up to 84%. This efficiency is achieved through features such as a full-modulating burner and a unique heat exchanger design that allows for optimal heat transfer and reduced flue gas temperatures.

The CGI-4E is also remarkable for its versatility. It is offered in a variety of sizes, making it suitable for different heating loads. This flexibility allows for installation in a wide range of environments, adapting easily to both existing and new heating systems. Additionally, the boiler comes with multiple venting options, including direct vent and conventional venting, further enhancing its installation flexibility.

Another standout feature is the integrated boiler control system, which simplifies operation and monitoring. This control system optimizes burner performance and enhances safety features, including automatic shut-off in case of system anomalies. The advanced controls also allow for easy integration with building management systems, enabling better energy management and reduced operational costs.

The CGI-4E also emphasizes ease of maintenance, with service-friendly designs that allow technicians to access components without difficulty. This consideration translates to reduced downtime and lower maintenance costs, ensuring that the boiler operates efficiently over its lifetime.

Overall, the Weil-McLain CGI-4E blends reliability, efficiency, and advanced technology, making it a premier choice for commercial heating needs. Its cast iron construction, impressive efficiency ratings, versatile installation options, and user-friendly controls solidify its reputation as a leading boiler solution in the industry.