B Model Fan Motor Brush
Service Instruction
Figure 1
Figure 2
OVERVIEW
The EasyFire heater is equipped with a long life DC fan motor (Figure
1). This motor utilizes a special brush m aterial that may require additional break in tim e to properly wear in or seat the brushes. W hen the motor is new the brush has a contoured end that allows for
m inim um contact initially to facilitate the break in. As this wears the full width of the brush begins to contact the arm ature allowing for proper operation.
W e have found that a sm all quantity of motors have not im m ediately
Brush holder with accessseated the brushes causing a motor fault light (Red Flashing LED) on the control panel. The motor fault condition requires the unit to be powered down (unplugged) to clear. This condition may also be the result of a feed jam b. The control system is designed to address both inoperative fan and feed m otor in the sam e manner to protect the user and minim ize further dam age to the unit. The fan motor condition is easily corrected by dressing the brushes and reinstalling them .
Testing for a fan motor brush problem is accom plished by two
m ethods. After recycling the heater by unplugging and reestablishing power. Press the “Fan” switch only. If the fan runs push the Clean button and allow the motor speed to increase to full speed. If the “Red Safety Light” does not light then the fan motor is generally considered in proper operation. If pressing the Off button then pressing a run button such as Low provides a short period then a flashing “Red Safety Light” the feed may be jam bed. This can be cleared by rem oving pellets from hopper and rem oving access cover. If the safety light operates on “fan or clean” then accomplish the following service.
Tools Required: #2 Phillips screw driver, medium flat blade, small flat blade, #200 or fine sand paper strip (Figure 2).
Accessing the
motor for brush
service: The fan m otor is accessed from the rear of the heater by rem oving the phillips screws on the upper and lower rear access panels. Once the panels are free tilt the upper panel to the rear allowing the fan shroud to clear
Figure 3
the convection fan
blade (Figure 3)
Figure 4
Removing the wire harness connections : Using care not to bend the fan blade, carefully use a flat blade screw driver to help pry off the red and black motor wire term inals (Figure 4). Note the brush holders have a corresponding red and black base to confirm wire connections.
5061 Brooks St. Ste B Montclair, CA 91763
www.sierraproductsinc.net
P/N Fan Motor Brush Service 08 10/08
