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

3 Troubleshooting

Table 3D Troubleshooting Chart - Noisy System

FAULT

CAUSE

 

CORRECTIVE ACTION

 

 

 

 

 

 

 

 

 

 

- Gas supply problem.

• Refer

to the

Gas

Connections

Section

of the

 

 

Installation and Operation Manual for detailed

 

 

information concerning the gas supply.

 

 

 

 

 

 

- Gas/air mixture problem.

• Refer to the Checking Manifold Gas Pressure and

 

 

Combustion Analysis Procedure on pages 27 and 28 of

 

 

this

manual

for

the proper

settings.

Verify

 

 

that the vent/air intake lengths do not exceed the

 

 

maximum listed in the Venting section of the

 

 

Installation and Operation Manual.

 

 

 

 

 

 

- Dirty/damaged burner.

• Refer to pages 26 and 27 in this manual for the burner

Noisy

 

removal and inspection procedure. Clean or replace the

Operation

 

burner as necessary.

 

 

 

-Low water flow through the heat exchanger. • Refer to the Water Connections Section of the

Installation and Operation Manual for minimum flow rates. Verify that the appliance is piped in a primary/secondary fashion and that the appliance 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.

 

 

 

 

- Faulty pump relay.

• Replace relay.

No Pump

 

 

 

- Faulty pump.

• Replace pump.

Operation -

Boiler Pump

 

 

 

 

 

 

System Pump

- Internal fault on control board.

•

Check fuse F5.

or

 

•

Replace main control board.

DHW Pump

 

 

 

 

Note: Make sure the boiler pump horse power (hp) does

 

 

 

not exceed 1 hp.

 

 

 

 

- System pressure exceeds relief

valve • Lower the system pressure below the rating of

 

setting.

 

the supplied relief valve or replace the standard relief

 

 

 

valve with a higher rated valve up to the maximum

 

 

 

pressure of the heat exchanger.

Relief Valve

 

 

- Improperly sized expansion tank.

• Install properly sized expansion tank.

Opening

 

 

 

 

 

 

-Outlet water temperature in excess of 210°. • Check set point of temperature control.

•Check temperature rise across heat exchanger. Refer to the temperature rise chart in the Water Connections Section of the Installation and Operation Manual.

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Lochinvar 402 - 2072, 502 - 2072 service manual Noisy, No Pump, Boiler Pump System Pump, DHW Pump, Relief Valve, Opening
Page 33 Page 35

502 - 2072, 402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.
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