Contents

CONTENTS

2

2. MAINTENANCE

 

 

Hazard Definitions

2

Maintenance and Annual Startup

25-32

PLEASE READ BEFORE PROCEEDING

3

3. TROUBLESHOOTING

 

 

Handling Ceramic Fiber Materials

3

Before Troubleshooting

33

When servicing appliance

3

Check Control Module Fuses

33

Appliance operation

3

Table 3A - Troubleshooting Chart - No Display

34

Appliance water

3

Checking Temperature Sensors

35

WHAT IS IN THIS MANUAL

4

Table 3D - Troubleshooting Chart - Noisy System

36

1. SERVICE

 

Table 3E - Troubleshooting Chart - Fault Messages..

37-43

The Copper-fin Display

5

Revision Notes

Back Cover

Control Inputs

6

 

 

 

Control Outputs

7

 

 

 

General Operation

8

 

 

 

Sequence of Operation

9-10

 

 

 

Display Panel Menu Access

11

 

 

 

Display Panel Parameter Access

12

 

 

 

Parameter Table A - Boiler Operation

13-14

 

 

 

Parameter Table B - Water Heater Operation

15-16

 

 

 

Viewable and Changeable Control Parameters

17-24

 

 

 

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.

￿DANGER

￿WARNING

￿CAUTION

CAUTION

NOTICE

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but not related to personal injury or property damage.

2

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Lochinvar 2072, 402 service manual Contents

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.