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

3a Venting — general information

CGi-4E venting methods — Chimney draft or Direct exhaust

Chimney draft venting

Chimney draft venting uses the natural draft provided by a ver- tical vent or chimney. Category I appliance (non-positive vent static pressure and vent gas temperature that avoids excessive condensate production in vent). See Section 3b. Chimney draft installations use:

1.Vent connector (single or doublewall) sized to eliminate posi- tive pressure in vent system. Diameter increases immediately at boiler.

2.Doublewall metal vent (B-vent) or chimney with liner ap- proved by the National Fuel Gas Code, ANSI Z223.1–latest edition, or in Canada B149.1 or B149.2 Installation Code.

Direct exhaust — vertical or sidewall

Direct exhaust venting uses inside combustion air with no com- bustion air connector piping. The CGi-4E flue gas vent is pressur- ized, requiring careful sealing of all joints. Category III appliance

(positive vent static pressure and vent gas temperature that avoids excessive condensate production in vent). See pages 15-19.

Direct exhaust installations use:

1.Vent pipe specified in this manual.

2.Vent termination through outside wall, roof or unused chim- ney. Tight chimney areas will make vent joint construction very difficult.

3b

Venting — chimney draft venting

Table 3

Vent connector diameter

Figure 7

Chimnney

draft

venting

Boiler

“D” Minimum

model

vent connector

number

diameter

CGi-4E

5”

Inspect existing chimney before installing boiler. Failure to clean or replace perforated pipe or lining will cause severe personal injury or death.

Vent sizing given in Table 3 is only a general guideline. The vent connector and chimney must be designed, sized and constructed in compliance with all applicable codes. Failure to correctly size and install the vent system could result in severe personal injury, death or substantial property damage.

1.Use doublewall metal vent (B-vent) or chimney with liner as required by the National Fuel Gas Code, ANSI Z223.1–latest edition, or in Canada, B149.1 or B149.2 Installation Code.

2.To prevent downdrafts, chimney should extend at least 3 feet above the highest point where it passes through a roof and at least 2 feet higher than any portion of a building within a horizontal distance of 10 feet.

3.To vent with another appliance, see National Fuel Gas Code, ANSI Z223.1–latest edition or in Canada B149.2 or B149.2 Installation Code

4.Do not connect breeching to any portion of a mechanical draft system that can operate under positive pressure.

5.Maintain minimum 2”clearance from combustible materials to vent pipe.

6.Do not use chimney with an open fireplace.

7.Make horizontal runs as short as possible. Long runs can cause condensation.

8.When longer runs are used, support pipe with appropriate hangers.

9.To prevent blockage, do not vent into bottom of chimney.

10.Vent pipe must not go beyond inside wall of chimney.

11.Vent passing through floors or ceilings must be fire- stopped.

12.See Figure 7 and Table 3 to connect boiler to venting sys- tem.

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Part Number 550-110-711/1108

 

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Weil-McLain CGI-4E manual 3a Venting general information, Venting chimney draft venting, Chimney draft venting

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.