Bradford-White Corp BWCH Manual De Usuario

Page 24

 

SINGLE CIRCUIT CONNECTIONS 

PUMP

 

HEATER 

ONLY

 

 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

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.

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.

 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.

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.

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