Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION

Continued

You must install the combustion air inlet cap and the powered

vent cap on the same wall and in the same pressure zone.

 

 

 

 

 

 

 

 

 

 

Do not install the combustion air inlet cap closer than 10 feet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3.05m) from an inside corner of an L-shaped structure.

 

 

 

 

 

Vertical Rooftop Air Inlet

 

 

 

 

 

 

 

 

 

 

Use the vertical air inlet terminations available from the

 

 

 

 

 

appliance manufacturer, recommended and/or supplied by the

 

 

 

 

 

vent manufacturer, or use two 90° elbows as described on

 

 

 

 

 

page 24.

 

 

 

 

 

 

 

 

 

 

 

FIG. 15 Air Inlet Cap for Sidewall Termination

To prevent recirculation of flue products from an adjacent vent cap into the combustion air inlet, follow all applicable clearance requirements in the latest edition of the National Fuel Gas Code and/or CAN/CGA-B149 Installation Code and instructions in the Installation and Service Manual.

You must install the combustion air inlet cap at least one foot (0.30m) above ground level and above normal snow levels.

The point of termination for the combustion air inlet cap must be at least 3 feet (0.91m) below the point of flue gas termination (powered vent cap) if it is located within 10 feet (3.05m) of the flue outlet from the powered vent cap. Make sure to properly install the air inlet cap assembly on the air inlet pipe.

3'

12"

FIG. 16 Roof Top Combustion Air Inlet

Clearances

You must locate the air inlet termination elbow at least 12" (30cm) above the roof or above normal snow levels.

TABLE–C

Minimum Recommended Combustion Air Supply To Boiler Room

 

 

Combustion Air Source

 

 

 

Boiler Input

Outside Air*/2 Openings

Outside Air*/1 Opening

Inside Air/2 Openings

 

 

 

 

 

399,999

100 in2 (745 cm2)

133 in2 (858 cm2)

400 in2

(2581 cm2)

500,000

125 in2 (806 cm2)

167 in2 (1077 cm2)

500 in2

(3226 cm2)

650,000

163 in2 (1052 cm2)

217 in2 (1400 cm2)

650 in2

(4194 cm2)

750,000

188 in2 (1213 cm2)

250 in2 (1613 cm2)

750 in2

(4839 cm2)

990,000

248 in2 (1,600cm2)

330 in2 (2,129 cm2)

990 in2

 

(6,388 cm2)

1,260,000

315 in2

(2,032cm2)

420 in2

(2,710 cm2)

1260 in2

 

(8,130 cm2)

1,440,000

360 in2

(2,323cm2)

480 in2

(3,097 cm2)

1440 in2

 

(9,291 cm2)

1,800,000

450 in2

(2,903cm2)

600 in2

(3,871 cm2)

1800 in2 (11,614 cm2)

2,070,000

518 in2

(3,342cm2)

690 in2

(4,452 cm2)

2070 in2

(13,356 cm2)

*Outside air openings shall directly communicate with the outdoors. When combustion air is drawn from the outside through a duct, the net free area of each of the two openings must have twice (2 times) the free area required for Outside Air/2 Openings. The above requirements are for the boiler only, additional gas fired units in the boiler room will require an increase in the net free area to supply adequate combustion air for all units. Combustion air requirements are based on the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada refer to CAN/CGA-B149 Installation Code. Check all local code requirements for combustion air.

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Lochinvar 399, 999 - 750, CF-CH(E)-i&s-08 service manual Vertical Rooftop Air Inlet, Clearances

399, CF-CH(E)-i&s-08, 999 - 750 specifications

Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 is a cutting-edge boiler designed for commercial heating applications. With its robust construction and high efficiency, this model stands out in the crowded market of heating solutions.

One of the main features of the Lochinvar 999 - 750 is its exceptional thermal efficiency rating. The unit incorporates advanced condensing technology that allows it to recover heat from flue gases, which helps in achieving efficiency levels of up to 99%. This efficiency not only reduces energy consumption but also lowers operational costs, making it an excellent investment for businesses looking to minimize their carbon footprint.

The boiler is designed to provide a powerful output of 750 kW, ensuring it meets the heating demands of larger buildings or commercial spaces. Its capacity makes it suitable for a range of applications including schools, hospitals, and industrial facilities. Moreover, the unit features a built-in cascading system that enables multiple boilers to be connected, enhancing system reliability and flexibility.

In terms of technology, the Lochinvar 999 - 750 is equipped with a user-friendly touchscreen interface. This innovative control system allows operators to monitor and adjust settings with ease, providing real-time performance data and alerts for maintenance needs. The intelligent controls optimize operation to match the heating load, further enhancing energy efficiency.

Safety is a top priority with this model. It is built with multiple safety features such as automatic shut-off valves, pressure relief valves, and flame monitoring systems, ensuring safe operation under various conditions. The unit also adheres to stringent industry standards and regulations, making it a reliable choice for commercial applications.

Furthermore, the Lochinvar 999 - 750 is designed with serviceability in mind. Its compact footprint and accessible components simplify maintenance, reducing downtime and associated costs. The unit also supports a variety of fuel sources, including natural gas, propane, and biodiesel, providing flexibility to meet different facility requirements.

In summary, the Lochinvar 999 - 750, CF-CH(E)-i&s-08,399 represents a blend of efficiency, reliability, and safety in commercial heating. Its advanced technologies and thoughtful design make it a powerful solution for various heating needs, making it an ideal choice for businesses aiming for excellence in energy management and operational efficiency.