VI Air For Combustion and Ventilation

Sufficient fresh air must be supplied for combustion, ventilation and flue gas dilution. Provisions for combustion, ventilation and flue gas dilution air for gas utilization equipment vented by natural draft must be made in accordance with local building codes or, in absence of such codes, in accordance with the National Fuel Gas Code, NFPA 54/ANSI Z223.1.

Warning

An adequate supply of combustion and ventilation air must be provided

to assure proper combustion.

1)Start by determining whether the boiler is to be installed in a building of conventional construction or of unusually tight construction. A good definition of a building of unusually tight construction is one which has all of the following features:

Walls and ceilings exposed to outside atmosphere have a continuous water vapor retarder with a rating of

1perm or less with openings gasketed and sealed.

Weather stripping has been added on openable windows and doors.

Caulking and sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.

2)Determine the volume of the boiler room space. Rooms communicating directly with the boiler room space, in which the fuel burning appliances are installed, through openings not furnished with doors, are considered a part of the boiler room space.

Volume (ft³) = Length (ft) x Width (ft) x Height (ft)

In calculating the volume of the boiler room, consider the volume of adjoining spaces only if no doors are installed between them. If doors are installed between the boiler room and an adjoining space, do not consider the volume of the adjoining space, even if the door is normally left open.

3)Determine total input of all fuel burning appliances in the boiler room space. Add inputs of all fuel burning appliances in the boiler room space and round the result to the next highest 1000 Btu per hour.

4)Determine type of boiler room space to be used. Divide Volume by Total Input (in MBH) of all fuel burning appliances in the boiler room space. If the result is greater than or equal to 50 ft³/MBH, then it is considered an unconfined space. If the result is less than 50 ft³/MBH, then the boiler room space is considered a confined space.

A.For Buildings Not Of Unusually Tight Construction

1)Unconfined space - Fresh air infiltration through cracks and around windows and doors normally provides adequate air for combustion and ventilation without additional louvers or openings into the boiler room.

2)Confined space - Provide two openings into the boiler room, one near the floor and one near the ceiling. The top edge of the upper opening must be within 12” of the ceiling and the bottom edge of the lower opening must be within 12” of the floor. See Figure 10.

Each opening must have a free area of 1 square inch per 1000 BTU/hr input of all gas burning appliances in the boiler room. The minimum opening dimension is 3 inches. Minimum opening free area is 100 square inches per opening.

If the total volume of both the boiler room and the room to which the openings connect is less than 50 cubic feet per 1000 BTU/hr of total appliance input, install a pair of identical openings into a third room. Connect additional rooms with openings until the total volume of all rooms is at least 50 cubic feet per 1000 BTU/hr of input.

The “free area” of an opening takes into account the blocking effect of mesh, grills, and louvers. Where screens are used, they must be no finer than 1/4” (4 x 4) mesh.

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Crown Boiler 16-325 500506 manual VI Air For Combustion and Ventilation, 1513

16-325 500506 specifications

The Crown Boiler 16-325 500506 is a highly reliable heating solution designed for residential and light commercial applications. Known for its robust construction and advanced technologies, this boiler is engineered to deliver efficient heating while ensuring longevity and minimal maintenance.

One of the standout features of the Crown Boiler 16-325 is its durable steel construction, which is essential for handling the high temperatures and pressures involved in heating systems. The boiler is typically equipped with a cast iron heat exchanger, known for its excellent heat retention and distribution capabilities. This ensures that the system heats up quickly and maintains consistent temperatures throughout the space.

The boiler's capacity to produce 325,000 BTUs makes it suitable for larger homes or commercial buildings with significant heating demands. Its high input capacity allows for effective operation in areas where traditional systems may struggle to keep up with heating requirements. The Crown Boiler 16-325 employs a forced hot water system, which circulates water through pipes and radiators, providing uniform heat and comfort in indoor spaces.

A significant technological advancement in this model is its integrated control system. The advanced control module automates burner operation, ensuring optimal performance while minimizing energy consumption. This technology not only enhances efficiency but also helps in reducing operational costs, making it a cost-effective choice for users.

Moreover, the Crown Boiler 16-325 is designed with ease of installation and maintenance in mind. It features convenient access panels that simplify the maintenance process, allowing technicians to perform service checks and repairs without extensive downtime. This attribute is particularly beneficial for property managers or homeowners looking for a hassle-free heating solution.

In terms of safety features, the boiler is equipped with a pressure relief valve and a low-water cutoff switch, ensuring safe operation while protecting against potential hazards associated with overheating or lack of water.

Overall, the Crown Boiler 16-325 500506 is a powerful and efficient heating solution that excels in durability and performance. With its advanced technologies, substantial heating capacity, and user-friendly design, it represents an excellent choice for those seeking a reliable heating system that combines efficiency with long-term operational savings.