Contents

HAZARD DEFINITIONS

2

Multiple Vent/Air Terminations

29

PLEASE READ BEFORE PROCEEDING

3

Vertical Termination - Optional Concentric Vent

30-31

THE KNIGHT BOILER -- HOW IT WORKS

4-6

Alternate Vertical Concentric Venting

32-33

RATINGS

7

6. HYDRONIC PIPING

 

1. DETERMINE BOILER LOCATION

 

System Water Piping Methods

34

Provide Clearances

8

Low Water Cutoff Device

34

Provide Air Openings to Room

10

Chilled Water System

34

Flooring and Foundation

10

Freeze Protection

34

Residential Garage Installation

10

General Piping Information

34

Vent and Air Piping

10

Relief Valve / T & P Installation

35

Prevent Combustion Air Contamination

10

Near Boiler Piping Components

35-36

Corrosive Contaminants and Sources

11

Near Boiler Piping Connections

36

Using an Existing Vent System to Install a New Boiler

... 11

Circulator Sizing

36

Removing a Boiler from Existing Common Vent

12

Variable Speed Pump Option

38

2. PREPARE BOILER

 

7. GAS CONNECTIONS

 

Remove Boiler from Wood Pallet

13

Connecting Gas Supply Piping

46

Gas Conversions

13

Natural Gas

47

Leveling the Boiler

13

Pipe Sizing for Natural Gas

47

3. GENERAL VENTING

 

Natural Gas Supply Pressure Requirements

............. 47

Direct Venting Options

14-15

Propane Gas

47

Install Vent and Combustion Air Piping

16

Pipe Sizing for Propane Gas

47

PVC/CPVC Vent and Air Piping Materials

16

Propane Supply Pressure Requirements

47

Requirements for Installation in Canada

16

Check Inlet Gas Supply

48

Installing Vent and Air Piping

16

Gas Pressure

49

PVC/CPVC Air Intake/Vent Connections

17

Gas Valve Replacement

49

Air Inlet Pipe Materials

18

8. FIELD WIRING

 

Stainless Steel Vent

18

Line Voltage Connections

50

Stainless Steel Air Intake/Vent Connections

19

Low Voltage Connections

50

Min./Max. Combustion Air & Vent Piping Lengths

19

Wiring of the Cascade

52

Vent and Air Piping

20

9. CONDENSATE DISPOSAL

 

Optional Room Air

20

Condensate Drain

54

4. SIDEWALL DIRECT VENTING

 

10. STARTUP

55-60

Vent/Air Termination - Sidewall

21-24

11. OPERATING INFORMATION

 

Determine Location

21-23

General

61

Prepare Wall Penetrations

23

Cascade

64

Termination and Fittings

24

Sequence of Operation

65-66

Multiple Vent/Air Terminations

24

Knight Boiler Control Module

67-68

Sidewall Termination - Optional Concentric Vent

25-27

Status Display Screens

69-71

5. VERTICAL DIRECT VENTING

 

12. MAINTENANCE

 

Vent/Air Termination - Vertical

28-29

Maintenance and Annual Startup

72-76

Determine Location

28

13. DIAGRAMS

 

Prepare Roof Penetrations

29

Ladder Diagram

77

Termination and Fittings

29

Wiring Diagram

78

 

 

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 81 - 286 operation manual Contents

81 - 286 specifications

Lochinvar 81 - 286 is a state-of-the-art boiler recognized for its efficiency and reliability in both residential and commercial applications. This high-performance heating solution is designed to meet the diverse needs of users while adhering to modern environmental standards.

One of the standout features of the Lochinvar 81 - 286 is its advanced condensing technology. This allows the unit to harness more heat from the combustion gases, significantly boosting its thermal efficiency. With an impressive efficiency rating of over 95%, users can expect lower energy bills and reduced carbon emissions, making this boiler an environmentally friendly choice.

The Lochinvar 81 - 286 incorporates a robust stainless steel heat exchanger that guarantees durability and longevity. This corrosion-resistant material not only prolongs the unit's life but also ensures consistent performance over time. Additionally, the heat exchanger’s design facilitates optimal heat transfer, further enhancing the boiler's efficiency.

In terms of control, the Lochinvar 81 - 286 features a user-friendly control interface that simplifies operation. The boiler is equipped with advanced modulation capabilities, allowing it to adjust its output based on real-time heating demands. This responsiveness reduces energy waste and optimizes comfort levels within the space it serves.

The boiler also supports a variety of installation configurations, providing flexibility for different building layouts. Its compact design allows for easy installation in restricted spaces, while versatile venting options facilitate integration into various systems.

Safety is a paramount consideration in the design of the Lochinvar 81 - 286. The unit comes with integrated safety features such as a built-in diagnostic system that alerts users to any potential issues before they escalate. This proactive technology helps in maintaining seamless operation and reducing downtime.

Finally, the Lochinvar 81 - 286 is compliant with the latest regulations and industry standards, ensuring that it meets the expectations of both consumers and environmental agencies. With its impressive combination of efficiency, durability, and advanced technology, the Lochinvar 81 - 286 stands out as a top choice for anyone seeking a high-performance heating solution. This boiler not only addresses the immediate needs of heating but also supports long-term sustainability initiatives, proving to be a wise investment for the future.