Contents

CONTENTS

2

2. MAINTENANCE

 

 

Hazard Definitions

2

Maintenance and Annual Startup

31-35

PLEASE READ BEFORE PROCEEDING

3

3. TROUBLESHOOTING

 

 

Handling Ceramic Fiber Materials

3

Before Troubleshooting

36

When servicing boiler

4

Check Control Module Fuses

36

Boiler operation

4

Table 3A - Troubleshooting Chart - No Display

37

Boiler water

4

Checking Temperature Sensors

38

Freeze protection fluids

4

Table 3F - Troubleshooting Chart - Noisy System

39

WHAT IS IN THIS MANUAL

5

Table 3G - Troubleshooting Chart - Fault Messages . 40-51

1. SERVICE

 

Combustion Analysis Procedure

52

Boiler Piping

6

Table 3H - Troubleshooting Chart - Combustion Levels

52

SMART TOUCH Display (Home Screen)

7

Table 3I - Flue Products

52

Control Inputs

8

Gas Valve Adjustment Procedure

53

Control Outputs

9

Revision Notes

Back Cover

General Operation

10-11

 

 

 

Table 1A - Sequence of Operation

12

 

 

 

Table 1B - Parameter Table

13-17

 

 

 

Viewable and Changeable Control Parameters

18-25

 

 

 

Cascade Screen

26

 

 

 

Graph Screen

27

 

 

 

History Screen

28-29

 

 

 

Service Screen

30

 

 

 

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 1.5, 3.5, 2.5 service manual Contents

3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.