2 (contd.)

Example: A 60/100mm concentric vent system is planned for a horizontally vented MWC116 which has the following components:

•60/100mm Elbow Adaptor (supplied with the boiler)

•1 ft Straight Pipe

•90 elbow

•Uncut Terminal Section (supplied with the boiler)

The Vent Option #2 column in Table 7.1 describes a horizontal direct vent system using 60/100mm concentric vent pipe. From this column, we see that a MWC116 may have a vent length of up to 8ft- 10in. The 60/100 Elbow Adaptor supplied with the boiler is not considered. The length of the terminal section (not including the plastic terminal itself) is approximately 22 1/2” (1.9ft) installed. From Table 7.5, we see that the equivalent length of the 60/100mm elbow is 4.5ft. The total equivalent length of the planned venting system is therefore:

1ft (Straight ) + 4.5ft (90 Elbow) + 1.9ft (Uncut Terminal Section) = 7.4ft.

Since Table 7.1 shows a maximum allowable vent length of 8ft-10in, the planned vent system length is acceptable. Note that the 82mm inlet air orifice supplied with the boiler is not used.

3)Minimum Vent and Air Intake Lengths - Observe the minimum vent lengths shown in Tables 7.1 and 7.6.

4)Permitted Terminals for Horizontal Venting:

•Vent Option 1, 2 - The 60/100mm concentric vent terminal is supplied with the boiler as part of the standard vent system.

•Vent Option 3 - Use the optional 80/125mm Concentric Vent Terminal (Crown PN 230531)

5)Horizontal Vent Terminal Location - Observe the following limitations on the vent terminal location (also see Figure 7.4).

•Vent terminal must be at least 1 foot from any door, window, or gravity inlet into the building.

•The bottom of the terminal must be at least 12” above the normal snow line. In no case should it be less than 12” above grade level.

•The bottom of the vent terminal must be at least 7 feet above a public walkway.

•Do not install the vent terminal directly over windows or doors.

•The bottom of the vent terminal must be at least 3 feet above any forced air inlet located within 10 feet.

•In the USA, maintain a clearance of at least 4ft horizontally from the vent terminal to gas meters, electric meters, regulators and relief equipment. In Canada, maintain a 6ft clearance between the vent terminal and these devices.

•Do not locate the vent terminal under decks or similar structures.

•Top of vent terminal must be at least 5 feet below eves, soffits, or overhangs. Maximum depth of overhang is 3 ft.

•Vent terminal must be at least 6 feet from an inside corner.

•Vent Terminal must be at least 2ft from adjacent buildings.

•Under certain conditions, water in the flue gas may condense, and possibly freeze, on objects around the vent terminal including on the structure itself. If these objects are subject to damage by flue gas condensate, they should be moved or protected.

•If possible, install the vent and air intake terminals on a wall away from the prevailing wind. Reliable operation of this boiler cannot be guaranteed if these terminals are subjected to winds in excess of 40 mph.

•Air intake terminal must not terminate in areas that might contain combustion air contaminates, such as near swimming pools. See Section IV for more information on possible contaminates.

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Crown Boiler MWC Series, MWC116ENL, MWC116ELL, MWC116ENT, MWC116ELT manual
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MWC116ENL, MWC116ELL, MWC116ELT, MWC116ENT, MWC Series specifications

Crown Boiler's MWC Series represents a commendable choice in the realm of residential and light commercial heating solutions. Specifically, models like the MWC116ENT, MWC116ELT, MWC116ELL, and MWC116ENL stand out due to their exceptional performance, reliability, and innovative features.

At the core of the MWC Series lies a robust cast iron boiler construction designed to withstand the test of time. This material not only provides durability but also enhances heat retention, thereby increasing the system's efficiency. Each model in this series is designed for natural gas or propane fuel types, ensuring flexibility based on availability and user preference.

A notable feature of the MWC116 models is the efficient heat exchanger, which enables rapid heating of water for both space heating and domestic hot water applications. With a heating capacity of 116,000 BTUs, these boilers deliver ample warmth for mid-sized homes or light commercial settings, making them a versatile option for various applications.

The MWC116ENT model is equipped with an energy-efficient electronic ignition system, which enhances reliability and efficiency. This technology reduces energy consumption, providing users with cost savings on their utility bills. Similarly, the MWC116ELT model boasts an integrated aquastat that regulates water temperature, ensuring optimal performance and comfort.

For those requiring increased venting options, the MWC116ELL model includes advanced horizontal venting capabilities, allowing for flexible installation in various environments. This feature aids in overcoming space limitations and facilitating optimal combustion conditions. The MWC116ENL, on the other hand, features a low NOx emissions configuration, making it an environmentally conscious choice for users concerned about their carbon footprint.

User-friendly controls are a characteristic hallmark of the MWC Series, enabling straightforward operation and easy adjustments. The boilers come equipped with a digital display that provides critical system information and diagnostics, streamlining maintenance efforts.

Overall, the Crown Boiler MWC Series, particularly models like the MWC116ENT, MWC116ELT, MWC116ELL, and MWC116ENL, offer an impressive blend of efficiency, flexibility, and advanced technology. These units are designed to meet contemporary heating demands while ensuring sustainable operation, making them a wise investment for comfort and performance in residential and light commercial applications alike. With reliable construction and innovative features, the MWC Series remains a top choice for those seeking effective heating solutions.
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