Service Manual

1 Service (continued)

Viewable and changeable control parameters

CAUTION

Before changing parameters, note the

settings so that the unit can be returned to

 

 

its original operating parameters.

General

Time and Date

The control uses an internal clock for the night setback feature and for logging of events. For these features to work correctly, the clock must be set when the boiler is first installed or anytime the boiler has been powered off for more than four (4) hours. This parameter must be accessed to set the clock.

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore,

 

will require a manual adjustment.

Software Version

The software version allows the user to view the software version in use by the control. This software controls the operation of the boiler. When a new software version becomes available, the existing control can be replaced with a new control to update the software.

Software version is read only.

Temperature units (°C / °F)

The control can be configured to display temperature in either °C or °F. This parameter can be changed by the user or the installer by accessing the Temperature Units parameter. The default is °F.

Space Heating (SH) and Domestic Hot Water (DHW) Night Setback Offset

Once the unit’s internal clock has been set correctly, the Night Setback feature can be used to program a lower set point during unoccupied times. Both the space heating and DHW can be programmed for night setback. When in night setback, the control reduces the set point by a fixed amount. For space heating, it subtracts the space heating night setback offset from each of the SH user set points (SH1, 2, and 3 Set point parameters), or the calculated outdoor reset set point (if lower). For DHW, it subtracts the DHW night setback offset from the tank set point (Tank Set point parameter).

NOTE: The DHW night setback will not work without a tank sensor installed.

The installer may adjust the space heating night setback offset by accessing the SH Night Setback Offset parameter and the DHW night setback offset by accessing the DHW Night Setback Offset parameter. The minimum setting is 0°F (0°C) and the maximum setting is 90°F (50°C).

Space Heating (SH) and Domestic Hot Water (DHW) Night Setback On Times

This is the time in which the SH Night Setback Offset becomes active. There are 7 start times and 7 stop times each for the space heating and DHW night setback features. Both may be set to any time within a 7-day week. These settings are referred to as triggers. Multiple start or stop triggers may be set within a single day, if desired. When a start trigger and a stop trigger are set to the same time, the stop trigger has priority. The installer may adjust the space heating night setback start triggers by accessing the SH Night Setback On Times parameter. The DHW start triggers in the DHW Night Setback On Times parameter. This screen shows the start trigger number, the day of the week, and the time of day.

NOTICE

Please note that the brackets ([]) denote

 

screen status.

 

1.When the screen is first accessed, start trigger number 1 is shown. If a different trigger number is desired, the installer can rotate the NAVIGATION dial until the desired trigger number is displayed. Once the desired trigger number is selected, the installer can press the NAVIGATION dial and the day of the week will start to flash.

2.The installer can adjust the day of the week to the one he wishes to set. Once the day is set, the installer can press the NAVIGATION dial and the hour will begin to flash.

3.After setting the hour, the installer can press the NAVIGATION dial and the minutes will flash. Once all settings have been made, the installer can press the RIGHT SELECT [SAVE] key. The installer can now select a different trigger and adjust the settings for that trigger.

4.Once all adjustments are made, the installer can press the RIGHT SELECT [SAVE] key to save all of the new settings and return to the General menu, or press the LEFT SELECT [EXIT] key to return to the General menu without saving the changes.

Space Heating (SH) and Domestic Hot Water (DHW) Night Setback Off Times

The corresponding space heating night setback stop triggers are set by accessing the SH Night Setback Off Times parameter. The stop triggers for the DHW night setback feature can be adjusted by accessing the DHW Night Setback Off Times parameter. The adjustment procedure for these parameters is identical to the space heating start triggers described above.

Night Setback Override

Any Night Setback On trigger currently active or scheduled within the next seven (7) days can be skipped. To skip a trigger, press the MENU key for 5 seconds, enter the user password, and press the SAVE key. Rotate the NAVIGATION dial to NSB OVERRIDE, and press the NAVIGATION dial. A list of the current (if active) and upcoming NSB On triggers will appear.

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Lochinvar 400, 801 Viewable and changeable control parameters, Time and Date, Software Version, Temperature units C / F
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400, 801 specifications

The Lochinvar 801,400 is a cutting-edge solution in the realm of high-efficiency commercial water heating. This model represents a significant advancement in the design and functionality of water heaters, catering primarily to the demands of large-scale facilities like hotels, hospitals, and large industrial operations.

One of the standout features of the Lochinvar 801,400 is its impressive heating capacity, which can produce up to 801,400 BTUs, making it suitable for high-demand applications. This output is crucial for establishments that require a consistent supply of hot water, such as commercial kitchens and laundry facilities. The robust design ensures that it can handle peak demand periods without compromising performance.

Another significant aspect is the innovative use of advanced technology in its operation. The Lochinvar 801,400 integrates smart controls that enhance its efficiency and ease of operation. These controls allow for precise monitoring and adjustment of water temperatures, ensuring that the system operates within optimal parameters while maximizing energy savings. The intelligent monitoring system can provide real-time updates, making it easier for facility managers to keep track of performance and address maintenance needs proactively.

The construction of the Lochinvar 801,400 incorporates durable materials that not only enhance the longevity of the unit but also offer resistance to corrosion and wear. This durability translates into lower maintenance costs and an extended lifespan for the unit, making it a worthwhile investment for businesses.

Moreover, the Lochinvar 801,400 is designed with energy efficiency in mind. It boasts a high thermal efficiency rating, which reduces operational costs and minimizes the carbon footprint of heating operations. This efficiency is critical in today’s environmentally conscious market, where businesses are seeking to reduce their energy consumption and comply with strict regulations.

The design of the Lochinvar 801,400 also prioritizes safety, featuring innovative safety controls and fail-safes that protect both the unit and the users.

In summary, the Lochinvar 801,400 offers a combination of high capacity, advanced technology, durability, and energy efficiency, making it an excellent choice for commercial water heating solutions. As industries continue to evolve, the demand for reliable and efficient water heating solutions like the Lochinvar 801,400 will only increase.
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