Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 400 - 801 service manual

Models: 400 - 801

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Revision Notes: Revision A (ECO #C05747) initial release. Reflects the new model numbers for the Knight XL upgrade.

Revision B (ECO #C06234) reflects changes made to the Service Notification parameter.

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KBXII-SER Rev B 8/10

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Lochinvar 400 - 801 service manual

Contents

Models 400 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler What is in this manual? ServiceMaintenance Troubleshooting Service Near boiler piping Knight XL display Navigation Dial Control inputs LOW Voltage Connection Board Smart Control Module Control outputs Access modes General OperationHow the boiler operates How the control module operates Operation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display Status Display panel parameter access Parameter table General Settings Reset Notification Temperature units C / F Viewable and changeable control parametersDate and Time Software Version Temperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling SH Ramp Delay Control modesControlling Sensor BMS Thermostat Input Active / Inactive Cascade Offset Minimum On/Off Time Circulation pumps Service 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 ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodes Check flame signal Cleaning boiler heat exchangerReview with owner Model Kit Part Component Number Description Troubleshooting Before troubleshootingCheck control module fuses Check the following No Display No BurnerOperation Unit Does Not Checking temperature sensors Temperature ResistanceWire Color R/BK and Y Wire Color G and Y Resistance Temperature Noisy No PumpBoiler Pump System Pump DHW Pump Switch/LWCO Flow Anti-cycling Flame Fail Ign Auto Reset Flame SequenceHigh Limit Fan Low GV/Relay FailFan High Fan Speed High Flue Temp High Delta T HighOutlet Temp High Service Blk Rem Ctrl FltParameters Progr Watch Dog Error No Error StoredLow 24 vac Write EEProm Combustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply Pressure Gas valve adjustment procedure ModelModels 601 Page