Lochinvar 400-801 Viewable and changeable control parameters, Time and Date, Software Version

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Service Manual

1 Service

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.

The clock is automatically updated whenever a PC is connected and the Win_Pro-Installer program is started.

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).

18

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, rotate the NAVIGATION dial until the arrow (>) is next to the trigger you wish to skip. Press the NAVIGATION dial once. “SK” will appear next to that trigger to indicate that it will be skipped. You can restore an upcoming trigger by selecting that trigger, and pressing the NAVIGATION dial again. The “SK” next to that trigger will disappear.

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Contents Models 400 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Near boiler pipingKnight XL display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsHow the boiler operates Access modesGeneral Operation How the control module operatesOperation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Button Screen Status Operation DisplayDescription See User Access Installer Access Display Modify Parameter tableMenu Resetoutdoor ANTI-CYCLING See User Access Installer Access Display Modify DescriptionTime and Date Temperature units C / FViewable and changeable control parameters Software VersionTemperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling Control modes Cascade Offset Minimum On/Off TimeCirculation pumps Boiler Pump Anti-Seize Delay Boiler Pump DelayDHW Pump Delay DHW Pump Anti-Seize DelayService Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valve Check control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Model Kit Part Component Number DescriptionTest procedure Test low water flow conditionsCheck the following TroubleshootingBefore troubleshooting Check control module fusesOperation No DisplayNo Burner Unit DoesWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature Resistance Temperature Resistance Resistance TemperatureBoiler Pump NoisyNo Pump System PumpTroubleshooting Anti-cycling Temp SwOpen Flame Fail IgnCont’d Flame SequenceOutlet Arhl Outlet MrhlHigh Fan Low/HighFan Speed Low GV/RelayLouver Proving FaultSensor Shorted Inlet SensorMemory Error Flue Sensor FaultFatal Error Flue Temp DiffFlue Temp High Delta T HighOutlet Temp No Error Stored Service BlkWatch Dog Error Rem Ctrl FltCombustion Analysis Procedure Gas valve adjustment procedure ModelModels 601
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400-801 specifications

The Lochinvar 400-801 is a high-efficiency commercial boiler that embodies advanced engineering and cutting-edge technology. Designed for a variety of commercial applications, this boiler is known for its reliability, efficiency, and robust performance.

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