Service Manual

3 Troubleshooting

Table 3-3Troubleshooting Chart - Noisy System

FAULT

 

CAUSE

CORRECTIVE ACTION

 

 

 

 

 

 

- Supply gas problem. Natural gas pressures

 

 

 

should be between 4 inches w.c. and

• Refer to Section 7 - Gas Connections of the Knight

 

14 inches w.c.

LP gas pressures should

Boiler Installation and Operation Manual for detailed

 

be between

8 inches w.c. and

information concerning the gas supply.

 

 

14 inches w.c.

 

 

 

 

 

 

 

 

 

 

 

• Refer to the Gas Valve Adjustment Procedure

on

 

 

 

page 47 of this manual for the proper gas valve setting.

 

- Gas/air mixture problem.

Verify that the vent/air intake lengths do not exceed the

 

 

 

maximum listed in the General Venting section of the

 

 

 

Knight Boiler Installation and Operation Manual.

 

 

 

 

 

Noisy

 

 

• Refer to page 31 in this manual for the burner removal

- Dirty/damaged burner.

and inspection procedure. Clean or replace the burner

Operation

 

 

as necessary.

 

 

 

 

 

 

 

 

 

• Refer to Section 6 - Hydronic Piping of

the

 

 

 

Knight Boiler Installation and Operation Manual for

 

- Low water flow through the heat exchanger.

minimum flow rates. Verify that the boiler is piped in a

 

 

 

primary/secondary fashion and that the boiler and

 

 

 

system pump are running on a call for heat.

 

 

 

 

 

 

- Air in the piping system.

• Properly purge all air from the piping system.

 

 

 

 

 

 

- Low system water pressure.

• Verify system pressure is a minimum of 12 psi.

 

 

 

 

 

No Pump

 

 

• Replace fuse F1 on the control board, see page 33 of

Operation -

- Blown fuse.

 

this manual.

 

Boiler Pump

 

Note: Make sure pump amperage does not exceed

System Pump

 

 

 

 

1.8 amps.

 

or

 

 

 

 

 

 

 

DHW Pump

- Faulty pump.

 

• Replace pump.

 

 

 

 

 

 

 

 

 

- Internal fault on control board.

• Replace main control board.

 

 

 

 

 

 

 

 

• Lower the system pressure below the 30 psi rating of

Relief Valve

 

 

the supplied relief valve or replace the standard relief

- System pressure exceeds relief valve

valve with a higher rated valve up to the maximum

Opening

setting.

 

pressure of the heat exchanger.

 

 

 

 

• Improperly sized expansion tank.

 

 

 

 

 

 

36

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Image 36
Lochinvar 81-286 service manual Noisy, No Pump, Boiler Pump System Pump, DHW Pump, Relief Valve, Opening
Page 35 Page 37

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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