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Lochinvar 402 - 2072 service manual Display panel parameter access, Service, Cascade

Models: 402 - 2072

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Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service

Display panel parameter access

Table 1C_This is a typical example of accessing a parameter, shown for parameter K2, SH pump delay

Cascade

BMS

Page 12

Image 12

Lochinvar 402 - 2072 service manual Display panel parameter access, Service, Cascade

Contents

Copper-finII/IIE Boiler and Water Heater CFX-CHX-SERRev BSave this manual for future reference Hazard definitions DANGERContents When servicing appliance Please read before proceedingHandling ceramic fiber materials Appliance operationWhat is in this manual? ServiceMaintenance Troubleshooting1 Service The Copper-findisplayControl inputs 1 ServiceControl outputs 1 Service continuedGeneral Operation 1 ServiceInstaller How the appliance operatesSequence of operation OPERATIONDISPLAY 1 Service Sequence of operationOPERATION DISPLAYDisplay panel menu access 1 Service continuedDisplay panel parameter access 1 ServiceCascade Parameter table A - Boiler Operation 1 Service continuedONLY Parameter table A - Boiler Operation continued 1 ServiceParameter table B - Water Heater Operation 1 Service continued1 Service Viewable and changeable control parameters Temperature settingsTemperature units General1 Service Manual reset high limitAuto reset high limit boiler only Clear error logDHW settings DHW/SH switching time boiler onlySH/DHW switching time boiler only Freeze protection pump on1 Service Outdoor air reset boiler onlyFigure 1-1 OutdoorAir Reset Curve Outdoor air reset operationShift reset curve Boost temperatureMinimum On/Off delay Stages Next on delay1 Service Enable input active / inactiveModBus timeout Control modesMinimum power Maximum powerBuilding Management System BMS Cascade1 Service Service NotificationSystem pump delay boiler only SH pump delay boiler only2 Maintenance Maintenance and annual startup Service technicianOwner maintenance see the following pages for instructions2 Maintenance Address reported problemsInspect appliance area Inspect appliance interior2 Maintenance continued Check relief valveInspect/replace hot surface igniters Inspect/replace hot surface igniterCheck all wiring Check control settingsInspect and clean burner Perform start-upand checks2 Maintenance continued Adjusting combustion air pressure Checking manifold gas pressure2 Maintenance All models2 Maintenance continued TABLE 2B Net Manifold PressureRegulator Pressure Less Front Chamber Pressure Inspect and clean the heat exchanger Review with ownerOiled bearing circulators 2 Maintenance3 Troubleshooting Before troubleshootingCheck control module fuses Check the followingFAULT CAUSECORRECTIVE ACTION 3 Troubleshooting3 Troubleshooting continued Checking temperature sensorsWire Color - R and W Wire Color - Bk and G3 Troubleshooting FAULTTable 3D Troubleshooting Chart - Noisy System CAUSEDESCRIPTION 3 Troubleshooting continuedFAULT Flow Switch3 Troubleshooting FAULTError Gas Connections Section in the Installation and3 Troubleshooting continued FAULTAuto Reset Gas Connections Section of the Installation and3 Troubleshooting FAULTManual Reset the RESET button on3 Troubleshooting continued FAULTDESCRIPTION CORRECTIVE ACTION3 Troubleshooting FAULTDESCRIPTION CORRECTIVE ACTION3 Troubleshooting continued FAULTService Blk Watch Dog ErrorCFX-CHX-SERRev B 11/12