Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION Continued

Table - O

LTV Valve Kits

Input

LTV Valve Kit

Btu/hr

399,999 - 750,000VAL3048

990,000 - 2,070,000 VAL3047

 

 

 

 

 

 

 

 

 

 

 

Be sure to install the LTV valve per the piping diagrams

 

 

 

 

 

 

 

 

 

 

 

included with the kits. Alternatively, a bypass as shown in

 

 

 

 

 

 

 

 

 

 

 

FIG. 38 may be piped into the system. This piping is like a

 

 

 

 

 

 

 

 

 

 

 

primary/secondary boiler installation with a bypass in the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

secondary boiler piping. Inlet water temperatures below 140°F

 

 

 

 

 

 

 

 

 

 

 

(60°C) can excessively cool the products of combustion

 

 

 

 

 

 

 

 

 

 

 

resulting in condensation on the heat exchanger and in the flue.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Condensation can cause operational problems, bad

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

combustion, sooting, flue gas spillage and reduced service life

 

 

 

 

 

 

 

 

 

 

 

of the vent system and related components. The bypass allows

FIG. 36 Primary/Secondary Piping of a Single Boiler

part of the boiler discharge water to be mixed with the cooler

boiler return water to increase the boiler inlet temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

above 140°F (60°C). This should prevent the products of

 

 

 

 

 

 

 

 

 

 

 

combustion from condensing in most installations. The bypass

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

should be fully sized with a balancing valve to allow for proper

 

 

 

 

 

 

 

 

 

 

 

adjustment. A valve must also be provided on the boiler

 

 

 

 

 

 

 

 

 

 

 

discharge, after the bypass. Closing this discharge valve forces

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

water through the bypass. Start boiler adjustment with the

 

 

 

 

 

 

 

 

 

 

 

bypass valve in the full open position and the boiler discharge

 

 

 

 

 

 

 

 

 

 

 

valve half open. A small amount of the higher temperature

 

 

 

 

 

 

 

 

 

 

 

boiler discharge water is mixed with the system water to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

maintain the desired lower system temperature. A remote low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

temperature range operator is recommended to control the

 

 

 

 

 

 

 

 

 

 

 

boiler operation based on the lower system temperature. (See

 

 

 

 

 

 

 

 

 

 

 

Terminal Strip Connection Options starting on

 

 

 

 

 

 

 

 

 

 

 

page 40).

FIG. 37 Primary/Secondary Piping of Multiple Boilers

Low Temperature Return Water

Systems

Any non-condensing boiler and venting system will develop operational problems when exposed to inlet water temperatures below 140°F. Lochinvar offers a low temperature protection valve (LTV) that is factory preset to

maintain 140°F inlet water to the boiler regardless of the FIG. 38 Boiler with Low Temperature Bypass Piping system return water temperature. See Table O for available

valve kits.

36

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Page 36
Image 36
Lochinvar 999 - 750, 399 Low Temperature Return Water Systems, Table O LTV Valve Kits, Input LTV Valve Kit Btu/hr
Page 35 Page 37

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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