Installation & Operation Manual

5 Electrical connections

General information

￿WARNING ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before

making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death.

A 120 VAC, 15 Amp, 1 ph, 60 Hz circuit is required for operation of the appliance controls.

The appliance, when installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/NFPA No.

70.When the unit is installed in Canada, it must conform to the CAE C22.1, Canadian Electrical Code, Part I and/or local Electrical Codes. Multiple units connected in a Cascade must be grounded to the same ground connection.

1.All wiring between the appliance and field installed devices shall be made with type T wire [63°F (35°C) rise].

2.All line voltage wire exterior to the appliance must be enclosed in approved conduit or approved metal clad cable.

3.The circulating pump must run continuously when the appliance is being fired.

4.To avoid serious damage, DO NOT energize the appliance until the system is full of water. Ensure that all air is removed from the heat exchanger and piping before beginning initial operation. Serious damage may result if the appliance is operated without proper flow.

5.Provide the appliance with proper overload protection.

NOTICE DO NOT block access to the electrical cover plate when installing electrical conduit.

3-way automatic bypass valve wiring

If the piping loop was disassembled for shipping or needs to be fitted with an outdoor enclosure, connection or disconnection of the 3-way automatic bypass valve will be required. Wiring connections should be made to the appropriately numbered terminals on the 3-way automatic bypass valve as follows:

TABLE-5A

3-Way Automatic Bypass Valve Wiring

Wire

Color

FIELD

FACTORY

 

 

3-Way Valve

Low Voltage

 

 

 

 

Board

 

 

 

1

Blue

Terminal #1

Terminal #19

2

Orange

Terminal #2

Terminal #7

3

Black

Terminal #3

Terminal #6

4

Red

Terminal #4

Terminal #5

Note: Orientation of the valve connections may vary from what is shown. Care should be taken to ensure wires are connected to the appropriate terminals, see FIG. 4-8 on page 39 of this manual.

￿WARNING Power must be removed and the clutch button must be depressed before attempting

to manually operate the valve, or damage to the 3-way valve may occur.

TABLE-5B

Remote Wire Connection

Wire

Maximum

Gauge

Allowable Length

12 GA

100 ft.

 

 

14 GA

75 ft.

 

 

16 GA

50 ft.

 

 

18 GA

30 ft.

 

 

Figure 5-1_Control Panel Component Location

MAIN CONTROL

BOARD

LWCO/SWITCH

LOCATION

WIRE HARNESS

CONNECTIONS

BREAKER

LOCATION

OPTIONAL

AUXILIARY

HIGH LIMIT

LOCATION

TRANSFORMER

 

 

 

 

 

RELAY

 

 

 

 

ON/OFF

 

 

 

 

 

41

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

Page 40 Page 42
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Image 41
Lochinvar 2072, 502 Electrical connections, Way automatic bypass valve wiring, Way Automatic Bypass Valve Wiring
Page 40 Page 42

2072, 502 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.
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