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

1 Service (continued)

Viewable and changeable control parameters

CAUTION Before changing parameters, note the settings so that the unit can be returned to

its original operating parameters.

A: General

A1: User code

The User Code allows the user to access and change a limited number of control parameters. The access code can be changed by the user or the installer to a code of their choosing. To change the code, parameter A1 must be accessed. The default code is 0704. The code can be changed one digit at a time by using the arrow keys on the display.

A2: Date and time

The control uses an internal clock for the night setback feature and for logging of events. For these features to work correctly, the clock must be set when the unit is first installed or any time the unit has been powered off for more than 30 days. To set the clock, parameter A2 must be accessed. The date and time are displayed as “YY:MM:DD W hh:mm”. YY = year, MM = month, DD = date, W = day (1 = Monday, 2 = Tuesday, etc.), hh = hour (24 hour time; 2:00 PM = 14:00), mm = minutes.

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore, will

 

require a manual adjustment.

A3: Software version

The software version allows the user to view the software version in use by the control. This software controls the operation of the unit. When a new software version becomes available, the existing control can be replaced with a new control to update the software.

A4: Temperature units

The control can be configured to display temperature in either °C or °F. This parameter can be changed by the user or the installer by accessing parameter A4. The default is °F.

A5: SH Night setback offset

Once the internal clock has been set correctly, the SH night setback feature can be used to program a lower set point. The value of this parameter will be subtracted from the normal set point to determine the set point used during night setback. This parameter can be changed by the user or the installer by accessing parameter A5. The temperature range for this parameter is 0°F to 90°F (50°C). The feature is turned off with a setting of 0°F. The default value is 0°F.

A6: SH Night setback times

If parameter A5 is set to anything other than 0°F, the night setback feature becomes active. This will require start and stop times to be programmed for the days that reduced temperatures are required. These times can be changed by the user or the installer by accessing parameter A6. Each day of the week (Monday through Sunday) will have an on and off time.

Example: Monday ON: 22:30, Tuesday OFF: 6:45. If you wish to skip a day and have no night setback, set the on and off times to the same time, and prior to 12:00 p.m. To keep night setback active through the entire day, set the on and off time to the same time, and after 12:00 p.m. The default times for each day will be 08:00 (OFF) and 18:00 (ON).

A7: DHW Night setback offset

Once the internal clock has been set correctly, the DHW night setback feature can be used to program a lower SH set point during various times of the week. The value of this parameter will be subtracted from the normal set point to determine the set point used during night setback. This parameter can be changed by the user or installer by accessing parameter A7. The temperature range for this parameter is 0°F to 90°F (50°C). The default value is 0°F.

A8: DHW Night setback times

If parameter A7 is set to anything other than 0°F, the DHW night setback feature becomes active. This will require start and stop times to be programmed for the days that reduced temperatures are required. These times can be changed by the user or the installer by accessing parameter A8. Each day of the week (Monday through Sunday) will have an on and off time. If you wish to skip a day, set the on and off times to the same time, and prior to 12:00 p.m. To keep night setback active through the entire day, set the on and off times to the same time and after 12:00 p.m.

B:Temperature settings (boiler only)

B1: SH Set point user

The SH set point user sets the water temperature or pool temperature set point for fixed operation, or the maximum temperature set point when the outdoor air sensor is used. This parameter can be changed by the user or the installer by accessing parameter B1. The temperature range of this parameter is 60°F (15°C) to 230°F (110°C). The default value is 80°F (27°C).

B2: SH Minimum set point

The SH minimum set point sets the minimum water temperature set point that can be used for space heating and pool heater operation. The user or installer will not be able to program the control with a lower SH set point. This parameter can only be changed by the installer by accessing parameter B2. The temperature range of this parameter is 32°F (0°C) to 230°F (110°C) (space heating) or 32°F (0°C) to 105°F (40°C) (pool heater). The default value is 70°F (21°C).

15

Page 14 Page 16
Page 15
Image 15
Lochinvar 502 - 2072, 402 - 2072 service manual Viewable and changeable control parameters, Temperature settings boiler only
Page 14 Page 16

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.
Top Page Image Contents