8 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. 8-1.

2.Provide and install a fused disconnect or service switch (15 amp recommended) as required by the code (see FIG. 8-1).

3.When connecting a domestic hot water (DHW) pump, connect the wiring to the line voltage terminal strip as shown in FIG. 8-1.

4.To activate a system pump, wire as shown in FIG. 8-1. Dry contacts are sized for 1.5 hp/120V, 3 hp/240V or 30 amps.

Figure 8-1Line Voltage Field Wiring Connections

120V SUPPLY

NEUTRAL

 

 

 

W

 

 

 

GROUND G

 

 

 

LINE BK

 

 

 

SERVICE

 

 

 

SWITCH

 

 

 

SYSTEM

BK

 

 

G

 

 

PUMP

W

 

 

BOILER

BK

 

 

G

 

 

PUMP

W

 

 

DOMESTIC

BK

 

 

HOT WATER

G

 

 

W

 

 

PUMP

 

 

 

 

L2/N

G

L1

50

 

 

 

Low voltage connections

1.Route all low voltage wires through the knockouts in the rear of the boiler, as shown in FIG. 8-2.

2.Connect low voltage wiring to the low voltage connection board as shown in FIG. 8-3 on page 53 of this manual and the boiler wiring diagram.

Figure 8-2Routing Field Wiring

LOW VOLTAGE

CONNECTION BOARD

LINE VOLTAGE

JUNCTION BOX

LOW VOLTAGE

WIRING KNOCKOUTS

LINE VOLTAGE

WIRING KNOCKOUTS

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Lochinvar 801, 400 Field wiring, Installation must comply with, Line voltage connections, Low voltage connections

400, 801 specifications

The Lochinvar 801,400 is a cutting-edge solution in the realm of high-efficiency commercial water heating. This model represents a significant advancement in the design and functionality of water heaters, catering primarily to the demands of large-scale facilities like hotels, hospitals, and large industrial operations.

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