Manuals / Lochinvar / Household Appliance / Plumbing Product

Lochinvar 402 - 2072, 502 - 2072 service manual Circulation pumps, Service Notification

Models: 502 - 2072 402 - 2072

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

1 Service

J7: Set point at high voltage

This setting determines the set point used by the unit or cascade when the BMS voltage is at or above the Voltage at Maximum setting. This parameter is only active when the BMS type is set to Set Point. This parameter can be adjusted by the installer by accessing parameter J7. The temperature range for this parameter is 32°F (0°C) - 230°F (110°C) (boilers), 32°F (0°C) to 190°F (87°C) (water heaters), or 32°F (0°C) to 105°F (40°C) (pool heaters). The default value is 190°F (88°C) for water heaters, 220°F (104°C) for boilers, and 105°F (40°C) (pool heaters).

J8: Voltage to start CFH

When the Enable input is set to Inactive, this parameter determines the BMS input voltage at which the unit or cascade is enabled. When the unit is disabled, the unit will become enabled when the BMS input voltage rises up to or above this value. This parameter may be adjusted by the installer by accessing parameter J8. The range for this parameter is (J9 + 0.1V) - 10V. The default value is 2V.

J9: Voltage differential CFH

When the Enable input is set to Inactive, this parameter determines the BMS input voltage at which the unit or cascade is disabled. When the unit is enabled, the unit will become disabled when the BMS input voltage drops down to or below the enable voltage minus this value. This parameter may be adjusted by the installer by accessing parameter J9. The range for this parameter is 0V - (J8 - 0.1V). The default value is 1V.

K:Circulation pumps

K1: System pump delay

The system pump delay parameter sets the length of time the system pump (if connected) will run after a SH demand has been satisfied or outdoor air shutdown begins. This parameter is adjustable by the installer by accessing parameter K1. The time range for this parameter is 1 minute to 40 minutes. The default time is 30 seconds.

K2: SH pump delay

The SH pump delay parameter sets the length of time the boiler pump will run after a SH demand has been satisfied. This parameter is adjustable by the installer by accessing parameter K2. The time range for this parameter is 1 minute to 40 minutes. The default time is 30 seconds.

K3: DHW pump delay

The DHW pump delay parameter sets the length of time the DHW pump (boiler), or unit pump (water heater) will run after a DHW demand has been satisfied. This parameter is adjustable by the installer by accessing parameter K3. The time range for this parameter is 1 minute to 40 minutes. The default time is 30 seconds.

K4: System pump mode (boiler only)

The system pump can be configured to operate in one of two modes. “CFH” runs the system pump whenever there is a SH demand. “WWSD” runs the system pump continuously, except when the boiler is blocked due to outdoor shutdown. To adjust the System Pump Mode, access parameter K4. The default mode is CFH.

L: Service Notification

L1: Service calendar time (months)

When the boiler control determines that a scheduled service is due based on days of installation, the boiler display will alternate the standard boiler display text with the message SERVICE DUE every 5 seconds. This parameter is adjustable by the installer by accessing parameter L1. The time range for this parameter is 0 months to 36 months. The default time is 12 months.

L2: Service runtime (hours)

When the boiler control determines that a scheduled service is due based on the hours of actual operation, the boiler display will alternate the standard boiler display text with the message SERVICE DUE every 5 seconds. This parameter is adjustable by the installer by accessing parameter L2. The time range for this parameter is 0 hours to 100,000 hours. The default time is 10,000 hours.

L3: Service cycles

When the boiler control determines that a scheduled service is due based on the number of boiler cycles, the boiler display will alternate the standard boiler display text with the message SERVICE DUE every 5 seconds. This parameter is adjustable by the installer by accessing parameter L3. The range for this parameter is 0 cycles to 100,000 cycles. The default is 10,000 cycles.

L4: Reset service reminder

Once servicing has been completed, the service notification counter should be reset. This parameter can be reset by the installer by accessing parameter L4. Once accessed, press the RESET key to reset the service notification counter.

L5: Personality plug

After replacing a control board, the new control will require the installer to verify the model in which it is installed. As soon as the power is turned on, the screen will display “Wrong ID Plg”. Look behind the control panel at the connector plugged into X5 on the control board. Note the number written on the connector. Access parameter L5. That number should appear after the word “Setting:” on the bottom line. If this number matches the number on the connector, press “Enter”.

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Lochinvar 402 - 2072, 502 - 2072 service manual Circulation pumps, Service Notification
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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.