Lochinvar 399 - 800 service manual Control inputs

Page 8

1Service

Control inputs

GAS PRESSURE SWITCH

(OPTIONAL)

DHW THERMOSTAT

(OPTIONAL)

ROOM THERMOSTAT /

ZONE CONTROL

FLOW SWITCH

SYSTEM SENSOR

DHW TANK SENSOR

(OPTIONAL)

OUTDOOR SENSOR

(OPTIONAL)

SEQUENCER / BUILDING MANAGEMENT SYSTEM (OPTIONAL)

LOW WATER CUTOFF

(OPTIONAL)

INLET TEMPERATURE

SENSOR

OUTLET TEMPERATURE

SENSOR

FLUE GAS SENSOR

AIR PRESSURE SWITCH

HIGH LIMIT

FLAME SENSOR

BLOCKED DRAIN SWITCH

DISPLAY PANEL

PC INTERFACE

(OPTIONAL)

8

Service Manual

LOW VOLTAGE

CONNECTION

BOARD

SMART CONTROL MODULE

Page 7 Page 9
Image 8
Page 7 Page 9
Contents
Models 399 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials When servicing boiler What is in this manual? ServiceMaintenance TroubleshootingService Near boiler pipingKnight XL display Menu / Exit UP DownControl inputs Smart Control Module Control outputsGeneral Operation How the boiler operatesHow the control module 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 parametersDHW settings Outdoor air resetData logging FunctionsMaximum air temperature Shift reset curveMaximum SH set point Minimum SH set pointAnti-cycling Control modes SH controlling sensorSH source Boiler cascade addressCirculation pumps Service NotificationCascade offset Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature ResistanceNoisy No PumpOperation Boiler Pump System PumpSwitch/LWCO FlowFlame SequenceAnti-cycling No Flame IgnNo Flame RunningAdjustable High Limit w/ManualFan Low Fan Speed LowFan High Fan Speed HighSensor Open Sensor ShortedTemp O/Shoot Rem Ctrl Flt ParametersProgr OpenService Blk Watch Dog ErrorNo Error Stored Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModels 600 Gas valve adjustment procedureModel Page Page KBX-SER Rev E
Related manuals
Manual 20 pages 31.65 Kb
Top Page Image Contents