Lochinvar 81-286 service manual Flue Temp High, Delta T High, Outlet Temp

Page 44

Service Manual

3 Troubleshooting

Table 3-4(continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

FAULT

DESCRIPTION

 

CORRECTIVE ACTION

 

 

 

 

 

 

• Inspect the heat exchanger. Reference page 32 of

 

 

this manual for the procedure on how to clean the flue

 

 

side of the heat exchanger.

 

 

 

 

• Inspect the flue sensor and associated wiring.

 

 

Measure the resistance of the flue sensor and

Flue Temp High

The stack temperature has exceeded the set

compare to Table 3-2D on page 35 of this manual.

parameters for the boiler.

Replace the sensor if necessary.

 

 

 

• Verify that the vent/air intake pipes are properly

 

 

installed and that there are no obstructions.

 

 

 

• Replace the main control board.

 

 

 

 

 

 

• Verify that the system is full of water and that all air

 

 

has been properly purged from the system.

 

 

 

• Verify that the boiler is piped properly into the heating

 

 

system. Refer to Section 6 - Hydronic Piping of the

 

 

Knight

Boiler

Installation

and Operation

Manual

 

 

for the proper piping methods for the Knight boiler.

 

 

• Check for 120 vac to the boiler pump motor on a call

Delta T High

The temperature rise across the heat

for heat. If voltage is not present, check the wiring

back to the main control board. Replace the main

 

exchanger has exceeded the set parameters

 

control board if necessary.

 

 

 

for the boiler.

 

 

 

 

 

 

 

 

 

 

• If 120 vac is present on a call for heat and the boiler

 

 

pump is not operating, replace the pump.

 

 

 

• Verify that the boiler pump is set to the proper speed

 

 

or that the pump is the proper size. Reference

 

 

Section

6 -

Hydronic

Piping of the

Knight

 

 

Boiler Installation and Operation Manual for boiler

 

 

pump specifications.

 

 

 

 

 

 

 

• Verify that the system is full of water and that all air

 

 

has been properly purged from the system.

 

 

 

• Verify that the boiler is piped properly into the heating

 

 

system. Refer to Section 6 - Hydronic Piping of the

Outlet Temp

 

Knight

Boiler

Installation

and Operation

Manual

 

for the proper piping methods for the Knight boiler.

High

Outlet water temperature has exceeded the

 

 

 

 

 

 

maximum outlet water temperature.

• Check for 120 vac to the boiler pump motor on a call

 

 

for heat. If voltage is not present, check wiring back

 

 

to the main control board. Replace the main control

 

 

board if necessary.

 

 

 

 

• If 120 vac is present on a call for heat and the boiler

 

 

pump is not operating, replace the pump.

 

 

 

 

 

 

 

 

44

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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.
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