Lochinvar 2072, 502 Electrical connections, wayautomatic bypass valve wiring, General information

Models: 2072 502

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5 Electrical connections

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

3-way automatic bypass valve wiringFigure 5-1_Control Panel Component Location WIRE HARNESS

CONNECTIONS

BREAKER

LOCATION

OPTIONAL

AUXILIARY

HIGH LIMIT

LOCATION

TRANSFORMER

 

 

 

 

 

RELAY

 

 

 

 

ON/OFF

 

 

 

 

 

41

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

Page 41
Image 41
Lochinvar 2072, 502 operation manual Electrical connections, wayautomatic bypass valve wiring, General information