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

1 Service (continued)

Freeze protection pump on

In order to prevent the water in the heater from freezing, the SMART SYSTEM control turns on the boiler pump whenever the inlet temperature goes below the minimum temperature. The range of this parameter is 32°F (0°C) to 104°F (40°C). The default value is 45°F (7°C).

Freeze protection burner on

If the inlet temperature continues to drop after strating the pump (see Freeze Protection Pump On), and the inlet temperature goes below a second minimum temperature, the first stage will fire. The temperature range of this parameter is 32°F (0°C) to 104°F (40°C. The default value is 37°F (3°C).

Freeze protection differential

Once the pump has turned on, this parameter determines how much the inlet temperature must rise before the pump turns off. Similarly, once Stage 1 has turned on, this parameter also determines how much the inlet temperature must rise before Stage 1 turns back off. The temperature range of this parameter is 0° to 72°F (40°C). The default temperature is 5°F (3°C).

DHW/SH switching time (boiler only)

The time that the SMART SYSTEM control services a DHW demand before returning to the SH demand is set by this parameter. The range of this parameter is 0 to 240 minutes. Setting this parameter to 0 disables the switching function. The default value of this parameter is 30 minutes.

DHW Tank offset (water heater only)

The tank offset is the number of degrees the DHW tank temperature must go above the tank setpoint before the water heater will turn off. The temperature range of this parameter is 0° to 10°F (5°C). The default value is 4°F (2°C).

DHW Tank differential

The tank differential is the number of degrees the DHW tank temperature must go below the tank setpoint before the heater or boiler will start to heat the DHW tank. The temperature range of this parameter is 0° to 40°F (22°C). The default value is 6°F (3°C).

DHW settings

DHW tank setpoint

When a temperature sensor is installed in the DHW tank, the DHW tank setpoint sets the target temperature of the water in the tank. The temperature range of this parameter is 60°F (15°C) to 190°F (88°C). The default value is 120°F (49°C).

DHW boiler setpoint (boiler only)

When an indirect DHW call for heat becomes active, the control will use the DHW boiler setpoint to determine the firing rate of the unit based on the actual outlet water temperature. The temperature range of this parameter is 32°F (0°C) to 261°F (127°C). The default value is 180°F (82°C).

SH/DHW switching time (boiler only)

When a SH call for heat and a DHW call for heat are present at the same time, the SMART SYSTEM control can switch back and forth between the two calls. This parameter determines the maximum length of time the boiler will service the SH call before switching to the DHW call. The range of this parameter is 0 to 240 minutes. Setting this parameter to 0 disables the switching function. The control will service the DHW demand until it ends, then return to the SH demand (if active). The default value of this parameter is 30 minutes.

19

Page 18 Page 20
Page 19
Image 19
Lochinvar 402, 2072 service manual DHW settings
Page 18 Page 20

402, 2072 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

One of the standout features of Lochinvar 2072,502 is its advanced thermal efficiency. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the unit delivers exceptional heat output while minimizing energy consumption. This not only reduces utility bills for homeowners and businesses but also supports sustainability efforts by decreasing carbon footprints.

The Lochinvar 2072,502 incorporates cutting-edge technologies that set it apart in the market. It is equipped with advanced control systems that allow users to precisely manage heating outputs, ensuring optimal comfort while conserving energy. The user-friendly digital display provides real-time data, allowing for efficient monitoring and control.

Another significant characteristic of the Lochinvar 2072,502 is its robust stainless-steel construction. This feature enhances the unit's durability and longevity, ensuring reliable performance even in challenging conditions. The high-quality materials also contribute to maintaining consistent water temperatures, which is essential for both residential and commercial heating needs.

The Lochinvar 2072,502 operates silently, making it ideal for installations in areas where noise is a concern. Its compact design allows for flexible installation options, fitting seamlessly into various spaces, whether it’s a utility room, basement, or outdoor area.

Furthermore, the unit supports multiple venting options, accommodating different building architectures and layouts. This versatility makes it an ideal choice for new builds and retrofitting existing systems.

Maintenance is streamlined with the Lochinvar 2072,502, as it features a self-diagnostics system that simplifies troubleshooting. Regular service check-ups are made easier with accessible components, allowing technicians to perform maintenance tasks efficiently.

In summary, the Lochinvar 2072,502 stands out for its high efficiency, advanced technology, durability, and flexible installation options. It is an ideal choice for those seeking a reliable and technologically advanced water-heating solution that meets the challenges of contemporary heating demands while promoting energy savings and environmental responsibility.
Top Page Image Contents