Lochinvar 402 - 2072, 502 - 2072 service manual HTR Postpurge

Page 10

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

1 Service

Sequence of operation

Table 1A_(continued from previous page) Sequence of Operation - Space Heating and DHW

OPERATION

 

DISPLAY

 

 

 

9. If the DHW thermostat remains on for more than

30

 

minutes, and the space heating call for heat is also on, then

 

the control will turn on the boiler pump, turn off the DHW

HTR: RUN STG 12

pump after 2 seconds, and resume firing based on the

space heating set point. As long as both the space heating

OUT: 123.0F(129)

and DHW calls for heat remain active, the control will switch

 

back and forth between the two modes until one of them is

 

satisfied.

 

 

 

 

10. Once both calls for heat are satisfied, the control will turn

 

off the burners. The blower will remain on for

the

HTR: POSTPURGE

30 second postpurge cycle. Any pumps that are running

will continue to run for their respective pump delay times,

OUT: 127.4F(129)

then turn off.

 

 

 

 

11. Boiler pump off, system pump continues its delay if

HTR: Standby

longer.

 

OUT: 124.7F(129)

 

 

12. System pump off.

 

HTR: Standby

 

 

OUT: 122.9F(129)

10

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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 Maintenance What is in this manual?Service TroubleshootingService Copper-fin displayControl inputs Control outputs How the control module operates General OperationHow the appliance 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 pumpsOwner maintenance Maintenance Maintenance and annual startupService technician See the User’s Information Manual for instructionsMaintenance Check relief valve Inspect/replace hot surface igniter Inspect/replace hot surface ignitersInspect and clean burner Check all wiringCheck control settings 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 Check control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit Does NotResistance Temperature Checking temperature sensorsTemperature Resistance Boiler Pump System Pump NoisyNo Pump DHW PumpFlame Sequence Flow SwitchAnti-cycling HSI Current Low ErrorNo Flame Ign Flame CKTRunning Auto ResetNo Flame High LimitSensor Open Manual ResetInlet Low Sensor ShortedAPS Open Louver ProvingTank Open APS ClosedTemp O/Shoot Rem Ctrl FltProgr Service BlkParameters Low VoltageWrite EEProm Watch Dog ErrorNo Error Stored 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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