Installation and Service Manual

potable water exceeding these specifications. Heating of high hardness and/or high total dissolved solids water will require a larger circulating pump, an optional cupro-nickel heat exchanger and a revised temperature rise specification based on the water chemistry of the water to be heated. Water with a hardness of less than 5 grains per gallon will usually have a low pH which can be aggressive and corrosive causing non- warrantable damage to the heater, pump and associated piping. Corrosion due to water chemistry generally shows up first in the hot water system because heated water increases the rate of corrosive chemical reactions.

COLD WATER

SUPPLY

EXPANSION TANK

TABLE-X

Number of Units

Common Manifold

399,999 - 750,000 Btu/hr Models

Size (Min.)

 

 

 

1

 

2"

2

 

3"

3

 

3 1/2"

4

 

4"

5

 

5"

6

 

5"

Number of Units

Common Manifold

990,000 - 2,070,000 Btu/hr Models

Size (Min.)

MIXING VALVE

HOT WATER

SUPPLY

(IF REQUIRED)

1

2 1/2"

2

4"

RELIEF

CIRCULATING

VALVE

PUMP

RELIEF

VALVE

LOCK-TEMP

STORAGE

TANK

DRAIN

3

4"

4

5"

5

6"

6

6"

BUILDING

RETURN

FIG. 54 Typical Water Heater Piping with Storage Tank

Pipe Size Requirements

The pipe sizing chart provides minimum pipe size for common manifold piping to ensure adequate flow.

Circulating Pump

1.The water heater must be connected to a properly sized pump that circulates water between the heater and storage tank.

2.Pump is sized to heater input and water hardness. Care should be taken to size pump correctly. See Water Chemistry on page 52.

3.The water heater is equipped with a factory-supplied pump delay system in accordance with the requirements of the latest edition of ASHRAE 90.1.

4.Lubricate pump to manufacturers recommendations. Pump damage due to inadequate lubrication is non-warrantable.

5.Standard water heaters are furnished with the following circulating pump. Mount pump on unit’s inlet water connection.

399,999 - 750,000 Btu/hr Models

1/4 HP, 120 VAC, 5.8 Amp

990,000 - 2,070,000 Btu/hr Models

1/2 HP, 120 VAC, 7.4 Amp

53

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Lochinvar 999 - 750, CF-CH(E)-i&s-08 Pipe Size Requirements, Circulating Pump, Table-X, 399,999 750,000 Btu/hr Models
Page 52 Page 54

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.
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