Hydronic Heating Boilers and Domestic Water Heaters

OPERATION Continued

To program settings for Mode 1 operation, press in and hold the three programming buttons for 3 seconds. The screen will change from the View Menu to the Adjust Menu. “Adjust” will appear in the upper right corner of the screen. Just under the word “Adjust” will be either the number 1, 2, or 3. Press the “+” or “–” button to select the number “1”. This places the control into Mode 1.

Press the “Select” button to scroll through the menu offerings. Press the “+” or “–” button to change values within each offering.

See TABLE–Q , page 44 for Mode 1 Adjust Menu settings.

Programming For Mode 2, Water Heating Operation

Mode 2 is for base water heating operation. A tank sensor is supplied with the unit. You must connect the supplied tank sensor to the control and install the sensor into the water storage tank. If you do not, the controller will default to either inlet or outlet control (whichever is setup as the controlling sensor). Once the tank sensor is connected, the controller automatically selects that sensor as the controlling sensor. See Remote Mounting of Sensors on page 48 for more information on installing the tank sensor.

To program settings for Mode 2 operation, press in and hold the three programming buttons for 3 seconds. The screen will change from the View Menu to the Adjust Menu. “Adjust” will appear in the upper right corner of the screen. Press the “+” or “–” button until the number “2” appears under the word “Adjust”. This places the control into Mode 2.

Press the “Select” button to scroll through the menu offerings. Press the “+” or “–” button to change values within each offering.

See TABLE–Q, page 44 for Mode 2 Adjust Menu settings.

TABLE-S

Programming Worksheet

Stage 1:

 

Set Point 1_________

Off at_________

Differential 1_________

On at_________

Stage 2:

 

Set Point 2_________

Off at_________

Differential 2_________

On at_________

Stage 3:

 

Set Point 3_________

Off at_________

Differential 3_________

On at_________

Stage 4:

 

Set Point 4_________

Off at_________

Differential 4_________

On at_________

Programming For Mode 3, Sequenced Operation

Mode 3 is for sequenced operation. A Building Management System will sequence the operation of the unit. Most of the control of the unit will be handled by the Building Management System.

To program settings for Mode 3 operation, press in and hold the three programming buttons for 3 seconds. The screen will change from the View Menu to the Adjust Menu. “Adjust” will appear in the upper right corner of the screen. Press the “+” or “–” button until the number “3” appears under the word “Adjust”. This places the control into Mode 3.

Press the “Select” button to scroll through the menu offerings. Press the “+” or “–” button to change values within each offering.

See TABLE–Q, page 44 for Mode 3 Adjust Menu settings. Refer to FIG. 42 for various mode terminal strip connection options.

Remote Mounting of Sensors

You must mount the outside air temperature sensor outside the building. To mount remote sensors, follow the guidelines below. Take care to correctly wire sensors to the unit. Erratic temperature readings can be caused by poor wiring practices. Twist the wires between the unit and the remote sensor. Turn wires at least three or four turns per linear foot of wiring. This provides common mode rejection of some types of electrical interferences.

1.Do not route temperature sensor wiring with building power wiring.

2.Do not locate temperature sensor wiring next to control contactors.

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Lochinvar 999 - 750 Programming For Mode 2, Water Heating Operation, Programming For Mode 3, Sequenced Operation, Table-S
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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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