Lochinvar 400 - 801 service manual Service, Near boiler piping

Page 6

Service Manual

1Service

Near boiler piping

This piping reference is included to specify the Near Boiler Piping specific to the Knight XL. This piping scheme is important for proper operation of the SMART SYSTEM control. See the Knight XL Installation and Operation Manual for more detailed piping diagrams.

DIRT SEPARATOR

SYSTEM SENSOR

SYSTEM PUMP

O

T

M

E

T

S

Y

S

Y-STRAINER (RECOMMENDED)

BOILER PUMP

 

M

M

 

O

 

R

E

F

 

T

 

 

S

 

 

Y

 

 

S

 

 

DOMESTIC HOT

WATER PUMP INDIRECT

M

DOMESTIC

HOT WATER

O

F

R

 

O

TANK

 

T

 

TO FLOOR

DRAIN

6

Image 6
Contents Models 400 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid 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 Parameter table GeneralSettings Reset Notification Date and Time Temperature units C / FViewable and changeable control parameters Software VersionTemperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling Controlling Sensor SH Ramp DelayControl modes BMS Thermostat Input Active / InactiveCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Maintenance Maintenance and annual startup Service technicianOwner maintenance 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 Model Kit Part Component Number DescriptionCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature Resistance Resistance TemperatureBoiler Pump System Pump NoisyNo Pump DHW PumpSwitch/LWCO FlowAnti-cycling Flame Fail IgnHigh Limit Auto ResetFlame Sequence Fan LowFan High GV/RelayFail Fan Speed HighOutlet Temp Flue Temp HighDelta T High HighService Blk Rem Ctrl FltParameters Progr Low 24 vac Watch Dog ErrorNo Error Stored Write EEPromOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure ModelModels 601 Page