Lochinvar 402 - 2072, 502 - 2072 service manual Data logging, Functions

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

1 Service

B3: SH Maximum set point

The SH maximum set point sets the maximum water temperature set point that can be used for space heating. The user or installer will not be able to program the control with a higher SH set point. This parameter can only be changed by the installer by accessing parameter B3. 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 220°F (104°C) (space heating) or 105°F (55°C) (pool heater).

B4: SH Offset

The SH offset sets how many degrees above set point the temperature has to go before the unit will shut off. This parameter can only be changed by the installer by accessing parameter B4. The temperature range of this parameter is 0°F (0°C) to 54°F (30°C). The default value is 10°F (5°C) (boiler) or 2°F (1°C) (pool heater).

B5: SH Differential

The SH differential sets how many degrees below the turn off temperature the temperature has to go before the unit will turn on. This parameter can only be changed by the installer by accessing parameter B5. The temperature range of this parameter is 0°F (0°C) to 54°F (30°C). The default value is 20°F (11°C) (boiler) or 4°F (2°C) (pool heater).

B6: Manual reset high limit

The SMART SYSTEM control includes an integrated manual reset high limit (MRHL) feature, based on the outlet temperature. The set point for the MRHL is adjusted using parameter B6. The temperature range of this parameter is 32°F (0°C) to 210°F (99°C) for water heaters and pool heaters, or 240°F (115°C) for boilers. The default value is 210°F (99°C) for boilers and water heaters, or 200°F (93°C) for pool heaters.

B7: Auto reset high limit

The SMART SYSTEM control also includes an integrated auto reset high limit (ARHL) feature, based on outlet temperature. The ARHL set point is fixed at 205°F (96°C) for water heaters, and 185°F (85°C) for pool 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).

C:Data logging

C1: Hours running SH

The hours running SH parameter shows the total number of hours the unit has been in the SH firing mode. This parameter can be viewed by the user and the installer by accessing parameter C1.

C2: Hours running DHW

The hours running DHW parameter shows the total number of hours the unit has been in the DHW firing mode. This parameter can be viewed by the user and the installer by accessing parameter C2.

C3: Burner cycles

The burner cycles parameter shows the total number of times the unit has attempted to fire. This parameter can be viewed by the user and the installer by accessing parameter C3.

C4: Show last 10 lockouts

The control will log the 10 most current lockouts with the date and time the lockout occurred. This parameter can be viewed by the user and the installer by accessing parameter C4.

D: Functions

D1: Reset last 10 lockouts

The reset last 10 lockouts parameter allows the lockout counter to be reset to 0. This parameter can only be cleared by the installer by accessing parameter D1. Once accessed, press the RESET key to clear the counter.

D2: 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. This parameter can only be changed by the installer by accessing parameter D2. The time range of this parameter is 0 to 40 minutes. The default value is 20 minutes.

D3: 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 value of this timer can be adjusted using parameter D3. The range of this timer is 0 to 255 seconds. Setting this parameter to 0 disables the backlight. The default value is 60 seconds.

D4: 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. This time can be adjusted using parameter D4. The range of this parameter is 0 to 255 seconds. The default value is 20 seconds.

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Contents Copper-fin II/IIE Boiler, Water Heater Pool Heater Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid What is in this manual? ServiceMaintenance TroubleshootingService Copper-fin displayControl inputs Control outputs General Operation How the appliance operatesHow the control module operates Sequence of operationSequence of operation OUT 123.8F129HTR Postpurge Display panel menu access Display panel parameter access Datalogging Functions Settingsdhw Resetoutdoor Parameter tableAnti-cycle Delay Yes Temperature settings boiler only Viewable and changeable control parametersData logging FunctionsDHW settings Outdoor air reset boiler only Anti-cycling Control modes Building Management System BMS CascadeService Notification Circulation pumpsMaintenance Maintenance and annual startup Service technicianOwner maintenance See the User’s Information Manual for instructionsMaintenance Check relief valve Inspect/replace hot surface igniter Inspect/replace hot surface ignitersCheck all wiring Check control settingsInspect and clean burner Perform start-up and checksAccess to the burner will require the following steps Checking combustion air pressureAdjusting combustion air pressure Checking manifold gas pressureValve Fitting Control Knob Review with owner Inspect and clean the heat exchangerOiled bearing circulators Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotResistance Temperature Checking temperature sensorsTemperature Resistance Noisy No PumpBoiler Pump System Pump DHW PumpFlame Sequence Flow SwitchAnti-cycling Error No Flame IgnHSI Current Low Flame CKTAuto Reset No FlameRunning High LimitManual Reset Inlet LowSensor Open Sensor ShortedLouver Proving Tank OpenAPS Open APS ClosedTemp O/Shoot Rem Ctrl FltService Blk ParametersProgr Low VoltageWatch Dog Error No Error StoredWrite EEProm Program EEProm
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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.
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