Lochinvar 81-286 service manual Control inputs, LOW Voltage Connection Board

Page 8

Service Manual

1 Service

Control inputs

SYSTEM PUMP SPEED CONTROL

GAS PRESSURE SWITCH

DHW THERMOSTAT

ROOM THERMOSTAT /

ZONE CONTROL

FLOW SWITCH

SYSTEM SENSOR

OUTDOOR SENSOR

SEQUENCER / BUILDING

MANAGMENT SYSTEM

LOW WATER CUTOFF

O-TEMP HEAT EXCHANGER SWITCH

INLET TEMPERATURE

SENSOR

OUTLET TEMPERATURE /

HI-LIMIT SENSOR

FLUE GAS SENSOR

LOW VOLTAGE CONNECTION BOARD

AIR PRESSURE SWITCH

LOUVER PROVING SWITCH

FLAME SENSOR

BLOCKED DRAIN SWITCH

DISPLAY PANEL

PC INTERFACE

SMART CONTROL

MODULE

IMG00006

8

Image 8
Contents Models 81 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 boiler display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsAccess modes General OperationHow the boiler operates How the control module operatesOperation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Button Screen Status Operation DisplayMenu Description See User Access Installer Access Display ModifyParameter table DHW Settings Resetoutdoor See User Access Installer Access Display Modify DescriptionBMS Service Notification Temperature units C / F Viewable and changeable control parametersTime and Date Software VersionFunctions Temperature SettingsData Logging DHW Settings Outdoor Reset Anti-Cycling Ramp Settings Control modesControlling Sensor BMS Thermostat InputCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Instructions 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 Check flame signalCleaning boiler heat exchanger Review with ownerOiled bearing circulators Kit Part Component Number DescriptionTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit DoesResistance Temperature Checking temperature sensorsTemperature Resistance Temperature Resistance Noisy No PumpBoiler Pump System Pump DHW PumpTroubleshooting Temp Sw OpenApplies to the 286 Model Only Anti-cyclingCont’d Flame SequenceOutlet Arhl Outlet MrhlFan Low/High Fan Speed LowHigh GV/RelayFault Sensor ShortedLouver Proving Inlet SensorFlue Sensor Fault Fatal ErrorMemory Error Flue Temp DiffOutlet Temp Flue Temp HighDelta T High Parameters Progr Service BlkRem Ctrl Flt Combustion Analysis Procedure Gas valve adjustment procedure Gas Valve AdjustmentOr Obstruction Gas Supply Pressure
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81-286 specifications

Lochinvar 81-286 is a highly efficient and innovative heating solution that represents the latest advancements in boiler technology. This model, part of Lochinvar's prestigious line-up, is designed for commercial applications, delivering superior performance while emphasizing energy efficiency and user-friendly operation.

One of the standout features of the Lochinvar 81-286 is its robust construction. Built with high-quality materials, the unit is engineered for durability and reliability, ensuring long-term operation with minimal maintenance. Its compact design allows for versatility in installation, making it suitable for various building layouts and configurations.

The boiler's primary technology is its advanced condensing capability, which optimizes heat transfer and reduces energy consumption. By efficiently using the heat generated during combustion, the 81-286 can achieve higher thermal efficiencies, often surpassing traditional systems. This results in lower operating costs and reduced greenhouse gas emissions, aligning with the growing demand for sustainable energy solutions in commercial buildings.

Lochinvar incorporates intelligent control systems into the 81-286, featuring user-friendly interfaces that facilitate straightforward programming and monitoring. These control systems enable precise regulation of temperature and pressure, ensuring optimal operation while providing real-time feedback that aids in troubleshooting and maintenance. Users can enjoy the convenience of remote monitoring, enhancing the overall user experience.

Another key characteristic of the Lochinvar 81-286 is its capacity range. The model is available in various sizes, allowing it to meet the specific demands of different facilities, from small businesses to large industrial applications. This flexibility makes it a top choice for contractors and engineers seeking reliable heating solutions that cater to diverse needs.

In addition, the Lochinvar 81-286 boasts exceptional safety features, including built-in safeguards that protect against overheating and pressure surges. These aspects ensure that the unit operates within safe parameters, providing peace of mind for facility managers and operators.

In summary, the Lochinvar 81-286 combines durability, efficiency, and advanced technology, making it an ideal solution for commercial heating needs. With its innovative condensing design, intelligent controls, and safety features, this boiler stands out as a reliable choice for those seeking sustainable and effective heating solutions. Its versatility and performance make it a key player in today’s ever-evolving energy landscape.