Bradford-White Corp BWCV Manual De Usuario

Internet Version for Reference Only

Page 28

Copper Brute II

Page 29

signal to these terminals. The control energizes the 

heater pump (if equipped), energizes the Pmp-Pmp 

terminals, and turns on the heater pump segment in the 

display. The control also turns on stage 1 of the heater. 

Section 5.3 contains important information about 

external staging controls and building automation 

systems. Other wiring methods may be unsafe. The 

In addition to the temperature control, Copper 

Brute II appliances are fitted with a manual reset 

high limit and an automatic reset high limit. These 

are located near the rear of the cabinet on the right 

side, behind the slide out drawer (see Figure 17). 

Both controls should be set at least 25°F higher than 

the target temperature to avoid short cycling. To set 

these controls, remove the control panel cover and 

pull the control panel out to gain access. Appliances 

with reversed heat exchangers have the limit controls 

relocated to the left side of the appliance. The left 

access door must be removed to gain access to the 

limit controls on these appliances.

Advanced programming mode allows the 

installer to set the temperature control for proportional 

staging. In advanced programming mode, the 

interstage differential, interstage delay, interstage on 

and off delay, and minimum time on and off are all set 

manually.

NOTE: Advanced programming mode is rarely 

required. It is intended for advanced installers, 

and only when the application demands such 

programming.

To enter advanced programming mode, remove 

the bezel on the temperature control by pulling out at 

the bottom. Remove the small Phillips head screw to 

access the dip switch. The dip switch is mounted on a 

circuit board. 

Locate the letter “A” on the circuit board and 

slide the corresponding dip switch toward the letter 

“A”. The default setting of this dip switch is toward 

the “OFF” lettering on the circuit board.

The Copper Brute II appliance utilizes a modular 

design to achieve its stage-firing. The setup must be 

checked before the unit is put in operation. Problems 

such as failure to start, rough ignition, strong exhaust 

odors, etc. can be due to improper setup. Damage to 

the Copper Brute II resulting from improper setup is 

not covered by the limited warranty.

1.      Using this manual, make sure the installation 

is complete and fully in compliance with the 

instructions.

2.      Determine that the appliance and system are 

filled with water and all air has been bled from 

both. Open all valves.

3.      Observe all warnings on the Operating 

Instructions label and turn on gas and electrical 

power to appliance.

4.      Switch on the heater power switch located on the 

right side of the unit.

5.      The heater will enter the start sequence, as long 

as the unit is being called for heat. The blower 

and pump come on for pre-purge, then the ignitor 

warm-up sequence starts and after the ignitor 

warm-up is complete and all safety devices are 

verified, the gas valves open. If ignition doesn’t 

occur, check that there is proper gas supply. 

Wait 5 minutes and start the unit again. During 

initial start up, air in the gas line may cause the 

heater to "lock out" during the first few trials 

for ignition. Depending on the ignition modules 

installed, the manual reset button on the ignition 

modules may need to be depressed to restart the 

heater.

6.      When the unit is running, the supply gas pressure 

must be checked. Inlet gas pressure must not 

exceed 13" W.C. (3.2kPa). The minimum inlet 

gas pressure is 5" W.C. (1.2kPa).

7.      Once the inlet gas pressure is verified, the 

outlet gas pressure from each valve (manifold 

gas pressure) must be checked, and adjusted, if 

necessary. The manifold gas pressure must be 

2.5" W.C. (0.62kPa).

8.      Complete the setup by checking the CO

2

 at the 

outlet of the unit. The CO

2

 should be 8% for 

natural gas, or 9.2% for propane.

Burner Safety Shutoff Device must be tested. 

To test: 

         (a)    Close gas shutoff valve with burner 

operating.

         (b)    The flame will go out and blower will 

continue to run for the post purge cycle. 

One additional attempt to light will follow. 

Ignition will not occur as the gas is off. The 

ignition control will lockout, and will have 

to be reset before the unit will operate.

         (c)    Open gas shutoff valve. Restart the 

appliance. The ignition sequence will 

start again and the burner will start. The 

appliance will return to its previous mode 

of operation.

NOTE: Models 1000 - 2000 have two ignition controls 

and two ignitors, which work independently of one 

another. If the ignition control for stages 1 and 2 fails 

to properly light the main burners for those stages, the 

second ignition control will still be active, and will be 

able to energize stages 3 and 4. This, of course, will 

only occur if all other safety devices confirm that the 

unit will run in a safe condition.