Bradford-White Corp BWCV Manual De Usuario

Internet Version for Reference Only

Page 32

Copper Brute II

Page 33

The gas and electric controls on the appliance 

are engineered for long life and dependable operation, 

but the safety of the equipment depends on their 

proper functioning. It is strongly recommended that 

a qualified service technician inspect the basic items 

listed below every year.

         a.     Ignition controls

         b.     Ignitors

         c.     Water temperature control

         d.     Automatic gas valve

         e.     Pressure switches

         f.      Blowers

Close main manual gas valve before proceeding. 

Checking the burners for debris - Remove the ignitor 

inspection panels(s) and ignitor(s) and inspect the 

burners through the ignitor hole(s) using a flashlight 

to illuminate. If there is any indication of debris on 

the burners that are visible, all the burners will need 

to be inspected more thoroughly. Remove the screws 

from around the front of the air box (large panel from 

which the ignitor inspection panel(s) were removed), 

and remove the large panel. Remove the gas manifold 

assemblies and the burner panels. Inspect the burners. 

Clean burners, if necessary, by blowing compressed 

air from the outside of the burners into the center 

of the burner. A dirty burner may be an indication 

of improper combustion or dirty combustion air. 

Determine the cause, and correct. Replace the burners 

in the reverse order

The filter used in the heater is washable with an 

83% arrestance. Since the filter is washable, it will 

only need replacement when unwashable, deteriorated 

or damaged. If filter replacement is needed, it should 

only be replaced with a factory part. Inspect the air 

filter. If there is debris on the air filter, remove it from 

the filter box, and wash it with mild soap and water. 

Ensure that the filter is completely dry before re-

installing, in reverse order.

The gas valves are designed to operate with 

supply pressures of 4-13 inches w.c. (1.0 to 3.2 kPa).

To remove a valve, shut off 120-volt power and 

the manual gas shutoff valve. Remove the top front 

panel from the unit. Disconnect the wires to the valve. 

Disengage the flanges before and after the valve, 

and remove the valve. Re-install in reverse order, 

ensuring that the gasket o-rings are placed properly 

in the grooves on the flanges. Turn on manual gas 

shutoff valve and 120 volt power and check appliance 

operation and tightness of gas valve connections. 

The high limit switch is manual reset switch 

with an adjustable set point, up to 200°F (93°C). To 

replace the switch, shut off the 120-volt power to the 

appliance. Remove the cover from the switch to access 

the mounting screws. Remove the screws, and pull 

the switch off the control panel. Remove the capillary 

and bulb from the thermal well located in the header. 

Replace in reverse order.

An automatic reset high limit is used in addition 

to the manual reset high limit. The high limit switch 

has an adjustable set point, up to 200°F (93°C). To 

replace the switch, shut off the 120-volt power to the 

appliance. Remove the cover from the switch to access 

the mounting screws. Remove the screws, and pull 

the switch off the control panel. Remove the capillary 

and bulb from the thermal well located in the header. 

Replace in reverse order.

The temperature control is a Bradford White 

LHSC. To replace the control, shut off the 120-volt 

power to the appliance. Remove the cover from the 

control panel, and remove the mounting screws to 

remove the controller. Replace in reverse order.

The ignition controls ensure the proved 

interrupted-type ignition system. They control the 

hot surface ignitors and prove that the flame signal 

is appropriate for powering the gas valves. It also 

controls the blower’s pre-purge and post-purge. 

Copper Brute II models 500 and 750 have one ignition 

control. Models 1000 to 2000 have two ignition 

controls. On models 1000, one ignition control 

controls stages 1 and 2, and the second ignition control 

controls stage 3. On models 1250-2000, one ignition 

control is for stages 1 and 2, and the other is for stages 

3 and 4.

To replace a control, shut off the 120-volt power 

to the appliance. Remove the cover from the control 

panel. Remove the electrical connectors from the 

ignition control. Take out the controller’s mounting 

screws, and pull the controller out. Replace in reverse 

order.

The ignitors used are 120v “Hot Surface” type. 

They are energized whenever there is a call for heat 

and switched off when ignition is established and the 

flame has been sensed. Copper Brute II models 500 

and 750 have one ignitor. Models 1000 to 2000 have 

two ignitors. To replace the ignitor, shut off the 120-

volt power to the appliance, remove the ignitor access 

panel, disconnect the Molex connector, remove the 

two mounting screws on the ignitor flange, and pull the