Installation & Operation Manual

10 Ladder diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHERE POSSIBLE, SWITCHES ARE SHOWN WITHOUT UTILITIES (GAS,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WATER OR ELECTRICITY) CONNECTED TO THE UNIT. AS SUCH, ACTUAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH STATES MAY VARY FROM THOSE SHOWN ON DIAGRAMS

 

 

 

X10-4

 

X12-4

 

 

 

 

 

 

 

 

DEPENDING UPON WHETHER UTILITIES ARE CONNECTED OR A FAULT

 

 

 

 

 

 

 

 

 

 

 

 

CONDITION IS PRESENT. SEE WIRING DIAGRAM FOR ADDITIONAL NOTES.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOX DEPICTS OPTIONAL ITEMS

 

LOW VOLTAGE

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

X10-5

X10-6

X12-5

X12-6

 

 

 

 

UNIT PUMP RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 GAS VALVE

2 GAS VALVE

3 GAS VALVE

4 GAS VALVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHASSIS

 

 

 

CONTROL BOARD

STAGE

STAGE

STAGE

STAGE

 

N G

 

 

 

 

 

 

 

TERMINAL STRIP

 

 

 

 

 

 

 

 

 

X10-2

X10-3

X12-2

X12-3

 

 

BLOWER

N

 

 

BLOWER RELAY

HI/LO SPEED RELAY

UNIT PUMP RELAY

RECIRC PUMPRELAY

 

DHW PUMP RELAY (BOILER)

X13-

 

 

X112-

X12-

X13-

 

TRANSFORMER

INTERGRATED

X10-1

 

X12-1

 

X6-4

 

HIGH SPEED

LOW SPEED

 

SYSTEM/

STRIP

 

 

 

TRANSFORMER

 

 

TERMINAL STRIP

HI/LO SPEED

RELAY

 

HI/LO SPEED RELAY

INTERGRATED CONTROL BOARD

X1-8

X2-4

X1-2

TERMINAL

X1-1

X1-4

STAGEHSI1

X1-7 X110-

STAGEHSI3

X2-1 X22-

 

 

MODBUS INTERFACEBOARD

FUSE

BREAKER

 

 

 

 

 

 

 

BLOWER

RELAY

ON/OFF WISTCH

 

X1 -6

F2

3.15A

F4

5A

 

 

 

F5

5A

F6

5A

 

X1-1

CIRCUIT BREAKEROR

CIRCUIT

 

 

 

 

MANUAL RESET

HIGH LIMIT

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: Not all connections/features apply to pool heaters.

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Lochinvar 502, 2072 operation manual Ladder diagram, LOW Voltage

2072, 502 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.