- Sierra Product Heater Service Instructions

ManualsBrandsSierra Products ManualsElectric HeaterEasyFire B Model

5061 Brooks St. Ste B Montclair, CA 91763

800-527-4790 Fax 1-909-399-3357

www.sierraproductsinc.net

P/N Fan Motor Brush Service 08 10/08

B Model Fan Motor Brush

Service Instruction

Figure 1

Figure 3

Figure 2

Figure 4

OVERVIEW

The EasyFire heater is equipped with a long life DC fan motor (Figure

1). This motor utilizes a special brush material that may require

additional break in time to properly wear in or seat the brushes. W hen

the motor is new the brush has a contoured end that allows for

minimum contact initially to facilitate the break in. As this wears the full

width of the brush begins to contact the armature allowing for proper

operation.

W e have found that a small quantity of motors have not immediately

seated 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 jamb. The control system is designed to address both

inoperative fan and feed motor in the same manner to protect the user

and minimize further damage 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 accomplished by two

methods. 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 jambed. This can be cleared by removing pellets

from hopper and removing 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

motor is accessed

from the rear of the

heater by removing

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

the convection fan

blade (Figure 3)

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 terminals (Figure 4). Note the brush holders have a corresponding red and

black base to confirm wire connections.

Brush holder with access

Summary of content (2 pages)

PAGE 1
B Model Fan Motor Brush Service Instruction OVERVIEW The EasyFire heater is equipped with a long life DC fan m otor (Figure 1). This m otor utilizes a special brush m aterial that m ay require additional break in tim e to properly wear in or seat the brushes. W hen the m otor 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.
PAGE 2
Removing the brush caps: Using a sm all flat blade screw driver rem ove one brush cap at a tim e. Care should be taken as the brush holder has a spring that forces to the brush onto the arm ature. This spring m ay cause the cap to pop out unless held firm ly (Figure 5). Removing and dressing the brush: Rem ove the brush from the Figure 5 holder by lifting up and sliding the brush and spring clear (Figure 5).