Bradford-White Corp BWCV, BWCH warranty Electrical Connections, Main Power, Temperature Control

Page 24 BRADFORD WHITE CORP.

SECTION 5.

Electrical Connections

WARNING

The appliance 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 70, in the U.S. and with latest edition of CSA C22.1 Canadian Electrical Code, Part 1, in Canada. Do not rely on the gas

or water piping to ground the metal parts of the boiler. Plastic pipe or dielectric unions may isolate the boiler electrically. Service and maintenance personnel, who work on or around the boiler, may be standing on wet floors and could be electrocuted by an ungrounded boiler.

5.1Main Power

Single pole switches, including those of safety

controls and protective devices must not be wired in a grounded line.

All electrical connections are made in the field wiring terminal strip, which is located at the right side of the appliance.

NOTE: All internal electrical components have been prewired. No attempt should be made to connect elec-trical wires to any other location except the wiring box.

5.1.1 Power Circuits

All Copper Brute II non-pump-mounted heaters require a single 120-volt fused supply.

Pump-mounted Copper Brute IIs models 500-

1500 also uses a single 120-volt fused supply and models 1750-2000 use two 120-volt fused supplies.

The installer can change the pump mounted single service heaters to use a separate circuit for the pump, if desired. Instructions to make this change are found in Section 5.1.2.

Copper Brute II 500-1500 main power (L1, N1

&Ground) shall be connected to the three wires (10 AWG) supplied. Over current protection ratings can be found in Table 10.

	SINGLE CIRCUIT CONNECTIONS		PUMP
		HEATER	ONLY
	W/O PUMP	WITH PUMP
500	15	20	15
750	15	20	15
1000	20	25	15
1250	25	30	15
1500	25	30	15
1750	25	—	15
2000	25	—	20

Copper Brute II 1750-2000 will require two 120- volt fused supplies. Heater circuit can be identified with 10AWG wires to include black, white and green (all solid colors). Pump circuit can be identified with three 12AWG wires to include a black wire with a white tracer (stripe), a white and green wire.

5.1.2 Pump Circuit

Conversion to separate pump circuit will necessitate removing the three jumpers within the internal wiring of the 120-volt portion of the heater (see Figure 13). Only do this with the power disconnected to the unit.

To rewire the pump circuit, bring in another 120-volt fused supply (L2, N2 & Ground). Connect incoming power (L2) to the main power switch using spade (fork) terminal. From the other side of the main power switch connect to the main terminal block using a ¼" female insulated quick connect. This will be the same position where the jumper had terminated. Connect N2 and Ground to the main terminal block using ¼" female insulated quick connect (refer to Figure 13).

Ladder diagrams are shown in Figures 16 through 18, while wire diagrams are shown in Figures 19 through 21.

5.2 Temperature Control

5.2.1Temperature Control Description

The field wiring panel is located on the right

side of the Copper Brute II (shown in Figure 14). The following components are connected to the field wiring panel:

Temperature sensor: The sensor supplied loose

Table 10. Electrical Data. Figure 13. Removing Jumpers.