Lochinvar 2072, 402 service manual HTR Postpurge

Page 10

Copper-fin II/IIE Boiler and Water Heater 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 pump

after 2 seconds, and resume firing based on the space HTR: RUN STG 12

heating setpoint. As long as both the space heating and OUT: 123.0F(129) 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 and Water Heater Models 402 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 Parameter table a Boiler Operation OnlyAnti-cycle Time Anti Cycl Tm Parameter table B Water Heater Operation BMS Service Notification Pumps Temperature settings 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 Inspect/replace hot surface igniters Check relief valveInspect/replace hot surface igniter Inspect and clean burner Check all wiringCheck control settings Perform start-up and checks2Adjusting air shutter 399,999 750,000 Btu/ hr Models Adjusting combustion air pressure Checking manifold gas pressurePressure Regulator Chamber Adjustment Manifold Review with owner Inspect and clean the heat exchangerOiled bearing circulators Check control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit DoesResistance Temperature Checking temperature sensorsTemperature Resistance Operation 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 ClosedRem Ctrl Flt Temp O/ShootParameters Progr No Error Stored Service BlkWatch Dog Error Low Voltage
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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.
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