Sierra Products EasyFire B Model User's Manual
Contents
1. l D m i N pal l N amh ip mm T A ii il le Brush holder with access Figure 1 Figure 3 B Model Fan Motor Brush Service Instruction 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 When 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 We 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 accomplish2. ed 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 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 terminals Figure 4 Note the brush holders have a corresponding red and black base to confirm wire connections SPI Sierra Products Inc 5061 Brooks St Ste B Montclair CA 91763 800 527 4790 Fax 1 909 399 3357 w
3. into AC power and test run by running fan motor on Fan setting for 2 minutes and then running on Clean for 30 seconds Open hopper lid and run unit through a beginning start up by pressing Low and allowing fan to ignitor and fan to start up If all appears to activate reinstall unit Additional information is available on line www sierraproductsinc net pages customer_ service Technical Customer Service 909 399 3355x14 SPI Sierra Products Inc 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
4. ww sierraproductsinc net P N Fan Motor Brush Service 08 10 08 Removing the brush caps Using a small flat blade screw driver remove one brush cap ata time Care should be taken as the brush holder has a spring that forces to the brush onto the armature This Figure 6 Figure 7 Carefully reinstall upper rear panel Figure 8 spring may cause the cap to pop out unless held firmly Figure 5 Removing and dressing the brush Remove the brush from the holder by lifting up and sliding the brush and spring clear Figure 5 Once the brush is clear hold the brush base and carefully take a couple of swipes across the brush face with fine sand paper Figure 6 Figure 5 NOTE WHEN SANDING THE FACE OF THE BRUSH DO NOT REMOVE ANY MATERIAL WE ARE ONLY SCUFFING THE SURFACE TO ALLOW FOR BETTER BRUSH CONTACT Reinstalling the brush Insert the brush back into the holder Hold the terminal tab into the holder Carefully insert the cap and turn with a small flat bladed screw driver Use care not to cross thread the cap Once the cap is threaded lightly tighten against terminal tab Figure 7 Repeat service on lower brush Assembly Reconnect motor wires to red and black terminals Check fan blade for bent blades by spinning by hand If blades are not aligned carefully bend back into place Figure 8 After completing the installation of the rear panel and tightening all the phillips screws Plug the heater back
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