Lochinvar 400-801 Display panel parameter access, Button Screen Status Operation Display

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Service Manual

1 Service

Display panel parameter access

Table 1-3This is a typical example of accessing a parameter, shown for parameter Temperature Settings, MIN SH Setpt

BUTTON

SCREEN STATUS

OPERATION

DISPLAY

This example shows how to access parameter Temperature Settings. The first display shown is at the beginning of the menu listings, after entering the installer access code.

Rotate the NAVIGATION dial counterclockwise until the arrow (>) is next to TEMPERATURE SETTINGS.

Press the NAVIGATION dial one time.

Rotate the NAVIGATION dial counterclockwise until the arrow (>) is next to MIN SETPT.

Press the NAVIGATION dial one time.

Rotate the NAVIGATION dial to the desired temperature.

[SAVE]

Press the RIGHT SELECT soft key [SAVE] one time.

[EXIT]

Press the LEFT SELECT soft key [EXIT] if all desired changes have been made.

[HOME]

Press the LEFT SELECT soft key [HOME].

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Contents Models 400 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials 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 DisplayMenu Description See User Access Installer Access Display ModifyParameter table Resetoutdoor ANTI-CYCLING See User Access Installer Access Display Modify DescriptionTime and Date Temperature units C / FViewable and changeable control parameters Software VersionFunctions Temperature SettingsData Logging DHW Settings Outdoor Reset Anti-Cycling Control modes Circulation pumps Cascade OffsetMinimum On/Off Time Boiler Pump Anti-Seize Delay Boiler Pump DelayDHW Pump Delay DHW Pump Anti-Seize DelayService Notification Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check expansion tank Check boiler relief valve Flue vent system and air pipingCheck water system 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 DiffOutlet Temp Flue Temp HighDelta T High No Error Stored Service BlkWatch Dog Error Rem Ctrl FltCombustion Analysis Procedure Models 601 Gas valve adjustment procedureModel

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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.

One of the standout features of the Lochinvar 400-801 is its high thermal efficiency, which can reach up to 99%. This efficiency not only reduces fuel consumption but also lowers operating costs, making it an economical choice for businesses seeking to minimize overhead. The boiler employs a stainless steel fire-tube heat exchanger that ensures optimal heat transfer and durability. This construction allows for enhanced resistance to corrosion, thereby extending the boiler's lifespan.

The Lochinvar 400-801 is equipped with advanced control technologies that enhance its performance. With its built-in SMART SYSTEM control, users can easily monitor and manage the boiler’s operations, optimizing performance while ensuring ease of use. This control system features a user-friendly interface that provides real-time data, including temperature settings, pressure readings, and operational status, allowing for quick diagnostics and efficient troubleshooting.

Safety is paramount in the design of the Lochinvar 400-801. The boiler includes a comprehensive safety system that incorporates multiple safety interlocks and a venting system that prevents backflow and ensures safe exhaust. Moreover, the unit is designed to operate with minimal noise, making it suitable for environments where noise reduction is crucial.

Installation and maintenance of the Lochinvar 400-801 are straightforward, thanks to its compact design and multiple venting options. The low-profile construction allows for flexibility in placement, making it an ideal fit for tight spaces. Maintenance tasks are simplified with accessible components, minimizing downtime and ensuring the system operates efficiently over its lifespan.

In conclusion, the Lochinvar 400-801 stands out in the commercial boiler market with its blend of efficiency, reliability, and innovation. With its advanced technologies and features, businesses can achieve significant energy savings while ensuring comfortable and consistent heat for various applications. The Lochinvar 400-801 is an investment in quality and performance, backed by a well-established brand in the heating industry. Whether for a new installation or a replacement, this boiler offers a comprehensive solution for commercial heating needs.