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

1 Service

SH Maximum setpoint (boiler only)

The SH maximum setpoint sets the maximum water temperature setpoint that can be used for space heating. The user or installer will not be able to program the control with a higher SH setpoint. The temperature range of this parameter is 32°F (0°C) to 230°F (110°C). The default value is 220°F (104°C).

SH Offset (boiler only)

The SH offset sets how many degrees above setpoint the temperature has to go before the unit will shut off. The temperature range of this parameter is 0°F (0°C) to 54°F (30°C). The default value is 10°F (5°C).

SH Differential (boiler only)

The SH differential sets how many degrees below the turn off temperature the temperature has to go before the unit will turn on. The temperature range of this parameter is 0°F (0°C) to 54°F (30°C). The default value is 20°F (11°C).

Manual reset high limit

The SMART SYSTEM control includes an integrated manual reset high limit (MRHL) feature, based on the outlet temperature. The temperature range of this parameter is 32°F (0°C) to 210°F (99°C) for water heaters, or 240°F (115°C) for boilers. The default value is 210°F (99°C) .

Auto reset high limit (boiler only)

The SMART SYSTEM control also includes an integrated auto reset high limit (ARHL) feature, based on outlet temperature. The ARHL setpoint is fixed at 205°F (96°C) for water heaters. For boilers, the temperature range of this parameter is 32°F (0°C) to 235°F (113°C). The default value is 200°F (93°C).

Data logging

Hours running SH (boiler only)

The hours running SH parameter shows the total number of hours the unit has been in the SH firing mode.

Hours running DHW

The hours running DHW parameter shows the total number of hours the unit has been in the DHW firing mode.

Ignition attempts

The burner cycles parameter shows the total number of times the unit has attempted to fire.

Last 10 lockouts

The control will log the 10 most current lockouts with the date and time the lockout occurred.

Functions

Clear error log

The reset last 10 lockouts parameter allows the lockout counter to be reset to 0. Once accessed, press the RESET key to clear the counter.

Service mode delay

By pressing the PREVIOUS and NEXT keys on the front of the display for five (5) seconds, the control will be placed in Service Mode. This will override all other heat demands. The Service Mode allows the installer to set the unit to either maximum firing rate or minimum firing rate for the purpose of combustion analysis. The delay sets the length of time the unit will stay in the Service Mode if no keys have been pressed before going back to its original state. The time range of this parameter is 0 to 40 minutes. The default value is 20 minutes.

Display timeout

Whenever a button on the display is pushed, the backlight on the LCD is turned on, and a delay timer is reset. When this timer expires, the backlight turns off, and the display returns to the first Status Screen. The range of this timer is 0 to 255 seconds. Setting this parameter to 0 disables the backlight. The default value is 60 seconds.

Bypass valve time

In low temperature systems, a 3-way bypass valve can be installed between the outlet and the inlet of the heater (see Installation and Operation Manual). The SMART SYSTEM control can be set to automatically control this valve to maintain the inlet temperature above the condensing temperature. Different valves require different amounts of time to open and close completely. The SMART SYSTEM controls need to know how long this takes in order to control the bypass valve properly. The range of this parameter is 0 to 255 seconds. The default value is 20 seconds.

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Lochinvar 402 - 2072 service manual Data logging, Functions
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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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