Contents

HAZARD DEFINITIONS

2

PLEASE READ BEFORE PROCEEDING

3

SAFETY INFORMATION

4

THE COPPER-FIN II -- HOW IT WORKS

5-7

RATINGS

8

1. DETERMINE UNIT LOCATION

 

Location of Unit

9

Recommended Service Clearances

9

Non-Combustible / Combustible Flooring

10

Combustion Air Options

10-13

2. VENTING

 

Before You Begin

13

Vent System Options

14

General Venting Information

15

Conventional Negative Draft Venting

16-18

Vertical DirectAire Venting

19-21

Sidewall Venting

22-24

Horizontal DirectAire Venting

25

Direct Venting

26-29

Outdoor Installation

30

3. GAS CONNECTIONS

 

Connecting to Gas Supply

31

Gas Pressure Test

31

Checking Manifold Gas Pressure

31

Combination Gas Valves

32

Checking Gas Supply Pressure

33

4. WATER CONNECTIONS

 

Inlet & Outlet Connections

34

Relief Valve

35

Heating Boiler Installations

35-36

Low Temperature Return Water Systems

36

Low Temperature Bypass Requirements

36

Three Way Valves in System

37

Radiant Floor and Snow Melt Heating Systems

37

Typical Heating Boiler Installations

38

Installation with a Chilled Water System

38

Primary/Secondary Piping of a Single Boiler

39

Primary/Secondary Piping of Multiple Boilers

40

Boiler w/Low Temperature Bypass Piping

41

Primary/Secondary Piping with Buffer Tank

42

5. ELECTRICAL CONNECTIONS

 

 

Boiler Operating Control Module

43

Line Voltage Connections

44

Low Voltage Connections

44

Wiring of the Cascade

45

Low Voltage Field Wiring Connections

46

6. STARTUP

 

 

Check/Control Water Chemistry

47

Freeze Protection (when used)

47

Fill and Test Water System

47

Purge Air from Water System

47

Check for Gas Leaks

47

Check Thermostat Circuit(s)

48

Check Vent and Air Piping

48

Placing the Boiler in Operation

48

Start the Boiler

48

If Boiler Does Not Start Correctly

48

Set Space heating Operation (boiler only)

48

Operating Instructions

49

Set DHW Operation

50

7. OPERATING INFORMATION

 

 

General

51-53

Cascade

53-54

Sequence of Operation

55-56

Copper-fin II Control Module

56

Access Modes

57

Saving Parameters

57

Status Display Screens

58-61

8. DOMESTIC WATER HEATERS

 

 

Initial Setup of Maximum Water Flow

62

Water Chemistry

63

Typical Water Heater Piping w/Storage Tank(s)

64-65

Multiple Water Heater Piping w/Storage Tank(s)

........

66-67

Pump Operation

68

Minimum Water Temperatures (domestic hot water)

69

9. MAINTENANCE

71-75

10. CONNECTION DIAGRAM

76-77

11. LADDER DIAGRAM

78-79

Revision Notes

Back Cover

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 402 - 2072 operation manual Contents

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.