Lochinvar 150 - 800 service manual Control outputs

Page 7

1Service (continued)

Control outputs

LOW VOLTAGE

CONNECTION

BOARD

SMART SYSTEM

CONTROL BOARD

Service Manual

ALARM BELL

AUX. DEVICE RELAY

RUNTIME CONTACTS

SEQUENCER / BUILDING MANAGEMENT SYSTEM

DHW PUMP

IGNITER

BLOWER

GAS VALVE

DISPLAY PANEL

PC INTERFACE

Image 7

Contents Models 150 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid Troubleshooting What is in this manual?Service MaintenanceArmor water heater display ServiceControl inputs Control outputs Saving parameters General OperationHow the water heater operates Sequence of operationSequence of operation Use this procedure to access menus from the display panel Display panel menu accessButton Operation Display Comments Display panel parameter accessWHR Parameter tableNot used Data logging Viewable and changeable control parametersFunctions WHR settingsNot used Control modes Circulation pumps Service NotificationService technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check water heater relief valve Flue vent system and air pipingCheck water system Check expansion tankPerform start-up and checks Check ignition ground wiringCheck all water heater wiring Check control settingsOiled bearing circulators Check flame signalCleaning heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationTemperature F Resistance Ω Checking temperature sensorsOpening NoisyNo Pump Relief ValveGV/Relay Flow SwitchFlame SequenceNo Flame Ign Running No FlameFan Speed Low Manual ResetHigh Limit Fan LowSensor Shorted Fan HighFan Speed High Sensor OpenParameters Rem Ctrl FltProgr Low 24 VAC Service BlkWatch Dog Error No Error StoredGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModels 150 Gas valve adjustment procedureModel Models 600 4Gas Valve Adjustment Model