Bradford-White Corp BMT2H Manual De Usuario

Page 33

proper functioning. It is strongly recommended that 

a qualified service technician inspect the basic items 

listed below every year.

 

a.  Ignition control

 

b.  Ignitor

 

c.  Water temperature control

 

d.  Automatic gas valve

 

e.  Pressure switches and tubing

 

f. 

Blower

 

g.  High limit

 

h.  Pump (if required)

 

i. 

Relays

 

j. 

Flow switch

 

k.  Gas train

 

l. 

Control components

Close main manual gas valve before proceeding. 

Checking the burners for debris - Remove the ignitor/

burner access panel and ignitor, and inspect the 

burners through the ignitor hole using a flashlight to 

illuminate. If there is any indication of debris on the 

burners that is visible, all the burners will need to be 

inspected more thoroughly. Remove the gas manifold 

assemblies and the burner assemblies. 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 Brute Deluxe is washable 

and has an 80% arrestance rating. Since the filter is 

washable, it will only need replacement occasionally. 

If filter replacement is needed, it should only be 

replaced with a factory part. Inspect the air filter 

monthly, or more often in dirty environments. If there 

is debris on the air filter, remove it from the filter 

frame, and wash it with mild soap and water. Ensure 

that the filter is completely dry before reinstalling.

The gas valves are designed to operate with 

supply pressures of 4-13 in. 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 front 

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

Disengage the unions before and after the valve, and 

remove the valve. Pull the pipe nipples from the inlet 

and outlet of the valve, and clean the threads on the 

pipe nipples for reuse. Apply new tape or pipe dope 

to the pipe nipples (threaded joints should be coated 

with piping compound resistant to action of liquefied 

petroleum gas), and reinstall in reverse order. 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 a manual reset, non-

adjustable switch with a remote bulb-type sensor. 

Switches for water heaters and low temperature boiler 

models are set at 200°F. Switches for standard boilers 

are set at 240°F.

The control is located behind the front door, on a 

panel in front of the blower. The probe is in the outlet 

side of the header.

To reset the switch, unscrew the black cover that 

is over the reset button, and push the button. Replace 

the cover after the switch is reset.

To replace, shut off power to the appliance. 

Remove the cover that is over the button, and remove 

the nut that is around the button. Pull the control 

through the panel, and remove the spade terminals. 

Replace in reverse order.

The ignition control controls the hot surface 

ignitor and proves that the flame signal is appropriate 

for powering the gas valves. It also controls the 

blower’s pre-purge and post-purge. 

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 ignitor used is a 120v “Hot Surface” type. 

It is energized whenever there is a call for heat and 

switched off when ignition is established and the flame 

has been sensed. To replace the ignitor, shut off the 

120-volt power to the appliance, remove the ignitor/

burner access panel, disconnect the Molex connector, 

remove the two mounting screws on the ignitor flange, 

and pull the ignitor out. Install in reverse order, always 

using a new ignitor gasket with the replacement 

ignitor.

Ignitor gets hot. To avoid injury, handle the ignitor 

with caution.

Le dispositif d’allumage devient très chaud. 

Manipulez le dispositif d’allumage avec précaution.

The Brute Deluxe’s transformer is not capable 

of supplying control voltage for external devices such 

as zone valves, which must have their own separate 

power supply. Should a transformer need replacing, 

shut off the 120-volt power. Unplug the transformer