5 Electrical connections

Installation & Service Manual

Connecting to electrical supply

This unit is wired for 120 VAC service. The unit, 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 1 and/or local Electrical Codes.

WARNING

CAUTION

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.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

1.Use only Type-T wire [63°F (35°C) rise] on all wiring between the unit and field-installed devices.

2.Enclose line voltage wire exterior to the unit in approved conduit or approved metal-clad cable.

3.The pump must run continuously when the unit is being fired (water heaters must use the pump delay if the pump is to be cycled. See Freeze Protection, page 11 when cycling the pump). Water heaters use the pump delay as standard in accordance with ASHRAE 90.1 requirements.

4.To avoid serious damage, do not energize the unit until the system is filled with water.

5.Provide the unit with proper overload protection.

Do not block access to the electrical

NOTICE cover plate when installing electrical conduit.

TABLE 5A

AMP DRAW DATA

 

 

 

Approximate

Model

Controls

Fan

Total Amps @ 120

 

 

 

VAC

497

4.6

3.4

8.0

647

4.6

3.4

8.0

747

4.6

3.4

8.0

987

4.6

3.4

8.0

1257

4.6

3.4

8.0

1437

4.6

3.8

8.4

1797

4.6

3.8

8.4

2067

4.6

3.8

8.4

Figure 5-1_Control panel location

TWO STAGE

IGNITION

THERMOSTAT

MODULE

CONNECTION

 

BOARD

 

 

MANUAL

GROUND

RESET

HIGH LIMIT

SCREW

 

TERMINAL

 

STRIP

 

 

 

ON/OFF

 

 

 

24 VDC

 

 

 

 

 

24 VAC

 

 

 

 

COIL

 

 

 

 

SWITCH

 

RELAY

RELAY

 

 

 

 

 

 

 

 

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Lochinvar 497 - 2067 service manual Electrical connections, Connecting to electrical supply, AMP Draw Data, Vac

497 - 2067 specifications

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