Contents

Lochinvar 399 - 800 service manual Contents

Page 2

CONTENTS	. 2	2. MAINTENANCE
Hazard Definitions	. 2	Maintenance and Annual Startup	. . . . . . .	23-27
PLEASE READ BEFORE PROCEEDING	. 3	3. TROUBLESHOOTING
Handling Ceramic Fiber Materials	. 3	Before Troubleshooting	. . . . . . .	28
When servicing boiler	. 4	Check Control Module Fuses	. . . . . . .	28
Boiler operation	4	Table 3A - Troubleshooting Chart - No Display .	. . . . . . .	29
Boiler water	. 4	Checking Temperature Sensors	. . . . . . .	30
Freeze protection fluids	. 4	Table 3E - Troubleshooting Chart - Noisy System . . . . . 31
WHAT IS IN THIS MANUAL	. 5	Table 3F - Troubleshooting Chart - Fault Messages . . . .		32-39
1. SERVICE		Combustion Analysis Procedure	. . . . . . .	40
Near Boiler Piping	. 6	Table 3G - Troubleshooting Chart - Combustion Levels		40
The Knight Boiler Display	. 7	Table 3H - Flue Products	. . . . . . .	40
Control Inputs	. 8	Gas Valve Adjustment Procedure	. . . . . . .	41
Control Outputs	. 9	Revision Notes	Back Cover
General Operation	10
Sequence of Operation	11-12
Display Panel Menu Access	13
Display Panel Parameter Access	14
Parameter Table	15-16
Viewable and Changeable Control Parameters	17-22

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.

DANGER

WARNING

CAUTION

NOTICE

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but not related to personal injury or property damage.

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Contents

Models 399 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 Menu / Exit UP DownControl inputs Smart Control Module Control outputsHow the control module operates General OperationHow the boiler operates Sequence of operationSequence of operation BLR IgnitionBLR SH 41% Rate Display panel menu access Use this procedure to access menus from the display panelDisplay panel parameter access Value will appearTemperature Data Parameter tableControl Circulation Service Temperature settings Viewable and changeable control parametersData logging DHW settingsOutdoor air reset FunctionsMaximum SH set point Maximum air temperatureShift reset curve Minimum SH set pointAnti-cycling SH source Control modesSH controlling sensor Boiler cascade addressCirculation pumps Service NotificationCascade offset Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Check control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotChecking temperature sensors Temperature ResistanceOperation Boiler Pump NoisyNo Pump System PumpFlame Switch/LWCOFlow SequenceAnti-cycling No Flame IgnNo Flame RunningFan Low Adjustable HighLimit w/Manual Fan Speed LowSensor Open Fan HighFan Speed High Sensor ShortedTemp O/Shoot Progr Rem Ctrl FltParameters OpenNo Error Stored Service BlkWatch Dog Error Low 24 VACOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureModels 600 Gas valve adjustment procedureModel Page Page KBX-SER Rev E

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Lochinvar 399 - 800 service manual Contents