THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
Applicable to 4100 - Series units built before 2007. For 2007 and later models, see this topic
WARNING
HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death. Heater may be connected to more than one branch circuit. Disconnect power to all circuits before servicing.
Part Numbers:
Item #1021037R-240 Blower 2000/3100/4100 240V Repl (Units built before January 2007)
NOTE: Both core blowers MUST be replaced with same manufacturer for proper operation.
Disconnect Power
Disconnect power to all branch circuits of the heating system and remove the electrical panel cover.
Move Transformer
Remove the screws holding the transformer (Figure 7) in place and move the transformer to the side.
Remove Control Board
Remove the control panel (Figure 7) from its mounting position and disconnect interface cable from the control board.Move Center Plate
Remove the screws around the perimeter of the center plate (Figure 7) of the electrical panel. Move the center plate, with circuit boards attached, to the right of the electrical compartment.
NOTE: Use caution to not damage wiring when moving the plates.
Move Left Plate
Remove the screws around the perimeter of the left plate (Figure 7) of the electrical panel and set it aside to gain access to the core blowers.
Remove Springs
Unhook the springs (Figure 8) holding the core blowers in place and remove the core blowers.
Figure 8:
Disconnect Blower Wires
Disconnect the wires to the core blowers and remove blowers for the heater. Mark wires for proper installation of new core blowers.
Reconnect Wires
Connect wires to the new core blowers and place in the base of the heater. Motor faces out to the electrical panel.
Install Blower
Slide blower housing into the sheet metal lip and line up between the divots. Reference Figure 9.
Figure 9:
Secure with Springs
Secure the core blowers with the springs (Figure 8).
Re-install Plates
Re-install the left and center plates of the electrical panel.
NOTE: Use caution to not damage wiring when moving the plates.
Install the Cable
Secure the interface cable to the control board.
Install Control Board
Secure the control panel to the electrical panel.
Re-Install Transformer
Re-install the transformer, securing the yellow wire with the ring terminal to the left screw.
Install Cover and Energize
Secure the electrical panel cover and energize the heater.
Verify Locations
Verify Location 94 (L094) is set to the value of 195. If 208V application, Location 28 (L028) must be set to 10. For information on how to access location values, click here.
Complete System Checkout
Complete the system check-out procedure and verify core blower operation.