7 Field wiring

Installation & Operation Manual

￿WARNING

NOTICE

￿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.

Wiring must be N.E.C. Class 1.

If original wiring as supplied with boiler must be replaced, use only type 105°C wire or equivalent.

Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – latest edition.

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

Installation must comply with:

1.National Electrical Code and any other national, state, provincial, or local codes, or regulations.

2.In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local codes.

Line voltage connections

1.Connect 120 VAC power wiring to the line voltage terminal strip in the junction box, as shown in FIG. 7-1.

2.Provide and install a fused disconnect or service switch sized per the boiler amp draw (shown on the boiler rating plate) as required by the code (see FIG. 7-1).

3.When connecting the boiler, system and hot water generator pumps connect the wiring to the line voltage terminal strip as shown in FIG. 7-1. Maximum current is 1.5 amps. Install a field supplied contactor between the pump(s) and the boiler connections.

4.For alternate voltages, consult factory.

Figure 7-1 Boiler Line Voltage Field Wiring Connections

NEUTRAL W

GROUND G

LINE BK

SYSTEM PUMP DRY CONTACT

BOILER PUMP DRY CONTACT

HWG PUMP DRY CONTACT

SERVICE SWITCH

 

 

120V SUPPLY

NL

 

BE INSTALLED

FIELD SUPPLIED CONTACTOR MUST

SYSTEM PUMP BOILER PUMP HWG PUMP

MAX. 1.5 AMPS PER CONNECTION

CONTACTOR

 

 

 

(FIELD SUPPLIED)

 

 

 

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Lochinvar 3.5, 2.5 service manual Field wiring, Installation must comply with, Line voltage connections

3, 2, 3.5, 2.5 specifications

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