Contents

HAZARD DEFINITIONS

. 2

Vertical Termination - Optional Concentric Vent

. . . . . . . 29-30

PLEASE READ BEFORE PROCEEDING

. 3

Optional Vertical Concentric Venting

. . . . . . . 31-32

THE KNIGHT WALL MOUNT BOILER--HOW IT WORKS . . . 4-5

6. HYDRONIC PIPING

 

RATINGS

. 6

System Water Piping Methods

. . . . . . . 33

1. DETERMINE BOILER LOCATION

 

Low Water Cutoff Device

. . . . . . . 33

Provide Clearances

. 7

Chilled Water System

. . . . . . . 33

Provide Air Openings to Room

. 9

Freeze Protection

. . . . . . . 33

Wall Mounting Location

9

General Piping Information

. . . . . . . 33

Residential Garage Installation

. 9

Near Boiler Piping Components

. . . . . . . 34

Vent and Air Piping

. 9

Near Boiler Piping Connections

. . . . . . . 35

Prevent Combustion Air Contamination

. 9

Circulator Sizing

. . . . . . . 35

Corrosive Contaminants and Sources

10

Variable Speed Pump Option

. . . . . . . 37

Using an Existing Vent System to Install a New Boiler . .

10

7. GAS CONNECTIONS

 

Removing a Boiler from Existing Common Vent

11

Connecting Gas Supply Piping

. . . . . . . 46

2. PREPARE BOILER

 

Natural Gas

. . . . . . . 47

Remove Boiler from Wood Pallet

12

Pipe Sizing for Natural Gas

. . . . . . . 47

Gas Conversions

12

Natural Gas Supply Pressure Requirements

. . . . . . . 47

Mounting the Boiler

13

Propane Gas

. . . . . . . 47

3. GENERAL VENTING

 

Pipe Sizing for Propane Gas

. . . . . . . 47

Direct Venting Options

14-15

Propane Supply Pressure Requirements . . .

. . . . . . . 47

Install Vent and Combustion Air Piping

16

Check Inlet Gas Supply

. . . . . . . 48

PVC/CPVC Vent Piping Materials

16

Gas Pressure

. . . . . . . 49

Requirements for Installation in Canada

16

Gas Valve Replacement

. . . . . . . 49

PVC/CPVC Air Intake/Vent Connections

17

8. FIELD WIRING

 

Air Inlet Pipe Materials

17

Line Voltage Connections

. . . . . . . 50

Stainless Steel Vent

18

Low Voltage Connections

. . . . . . . 50

Max. Allowable Vent Piping Lengths

19

Wiring of the Cascade

. . . . . . . 52

Vent and Air Piping

19

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

21-22

General

. . . . . . . 61

Prepare Wall Penetrations

23

Cascade

. . . . . . . 64

Termination and Fittings

23

Sequence of Operation

. . . . . . . 65-66

Multiple Vent/Air Terminations

23-24

Knight Wall Mount Boiler Control Module

. . . . . . . 67

Sidewall Termination - Optional Concentric Vent

24-26

Status Display Screens

. . . . . . . 68-70

5. VERTICAL DIRECT VENTING

 

12. MAINTENANCE

 

Vent/Air Termination - Vertical

27-28

Maintenance and Annual Startup

. . . . . . . 71-74

Determine Location

27

13. DIAGRAMS

 

Prepare Roof Penetrations

28

Ladder Diagram

. . . . . . . 75

Termination and Fittings

28

Wiring Diagram

. . . . . . . 76

Multiple Vent/Air Terminations

28

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 51 operation manual Contents

51 specifications

Lochinvar 51 is an innovative and robust residential boiler system designed for high-efficiency heating needs. A popular choice among homeowners, the Lochinvar 51 stands out in the market due to its advanced features and eco-friendly technologies.

One of the main features of Lochinvar 51 is its compact design, making it ideal for installation in limited space environments such as attics or closets. Despite its small footprint, it boasts a powerful heating capacity, suitable for varying home sizes. The boiler operates with a modulating gas burner that allows it to adjust its heat output according to the demand, ensuring efficiency and comfort throughout the day.

The Lochinvar 51 employs a cutting-edge heat exchanger made from stainless steel, which is highly durable and resistant to corrosion. This design not only enhances the boiler's performance but also increases its lifespan. The unit offers impressive AFUE (Annual Fuel Utilization Efficiency) ratings, showcasing its capability to convert a significant portion of fuel into usable heat, thus minimizing energy waste and reducing heating costs.

Technologically, the Lochinvar 51 is equipped with advanced control systems that facilitate precise temperature management. The intuitive interface allows homeowners to easily set their desired temperature and monitor the system’s performance. Additionally, the integration of outdoor reset technology helps optimize energy consumption by adjusting the water temperature based on outside weather conditions, leading to further energy savings.

Safety features are also paramount in the Lochinvar 51. It includes built-in safeguards that monitor pressure and temperature, automatically shutting down the system in case of any irregularities. This not only protects the boiler but also ensures peace of mind for users.

Moreover, Lochinvar 51 supports compatibility with smart home systems, providing homeowners with remote control capabilities via mobile devices. This innovative feature enhances user convenience, allowing for easy adjustments and monitoring of the heating system from anywhere.

In conclusion, the Lochinvar 51 is an exceptional choice for homeowners looking for a reliable, efficient, and technologically advanced heating solution. With its impressive heating capacity, durable design, and innovative control features, it sets a high standard in residential boiler performance, making it a top contender in today’s market.