• Topic ID: id_15460165
  • Version: 3.0
  • Date: Jun 15, 2020 11:02:44 PM

Heat Exchanger Fan Replacement

Prerequisites

Overview

This procedure defines the steps necessary to replace the heat exchanger fan.

Procedure

  1. Remove side, top, and front gantry covers.
  2. Turn OFF service switches on the Service Switch Panel (AXIAL DRIVE ENABLE, HVDC ENABLE, 120VAC).
  3. Rotate gantry so that Heat Exchanger is at the 2 o'clock position.
  4. Remove the Black Shroud by removing the 6 screws.

    Figure 1. Black Shroud Removal

    note:

    Power I/F board removal is not necessary, if the upper side of the fan (Fan A in Figure 2) is replaced.

  5. Remove the clear plastic cover by removing the three 3mm hex head screws.

    Figure 2. Clear Plastic Cover Removal

  6. Disconnect seven cable connectors from the power I/F board.
  7. Remove two standoffs, four screws and a hex head screw. And remove the power I/F board.

    Figure 3. Standoff, Nut and Screw Removal

  8. Remove the screw and open the cable clamp, then disconnect the cable connector of the fan.

    Figure 4. Cable Clamp and Cable Connector

  9. Remove four hex head screws and remove the fan.

    Figure 5. Fan Removal

  10. Install the new fan into place, and tighten the 4 hex head screws (Torque: 2.0 Nm).
  11. Connect the cable connector of fan, and fix the cable with the cable clamp.
  12. Attach the power I/F board into place, and fix it using the two standoffs (Torque: 2.8 Nm), the four screws and the hex head screw (Torque: 3.3 Nm).
  13. Connect the seven cable connectors to the power I/F board.
  14. Attach the clear plastic cover into place, and fix it using the three hex head screws.
  15. Install the black shroud into place, and tighten the six screws (Torque: 3.3 Nm).
  16. Switch ON service switches on the Service Switch Panel (AXIAL DRIVE ENABLE, HVDC ENABLE, 120VAC). And confirm the replaced fan works properly.
  17. Install all covers on the gantry.

Finalization

  1. Perform System Scanning Test.