Assessments - 3, GPA: 3.3
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Special wiring routing holders have been designed into the unit. This extremely high voltage wiring must be routed correctly. Failure to route and isolate the wire can create a fire hazard, personal injury or property damage. INSULATOR BOARD WARNING - The unit has been designed with special insulator and isolator spacer boards that must be in position. These boards are made of a special insulator material and must be in position to properly isolate wiring and connectors from uninsulated parts. Failure to place the boards in the proper location can create a fire hazard, cause personal injury, or property damage. 2. Before removing the HV power supply board make note of the position of all the wiring. You will note that all wiring is bound and well away from the motor fan. The HV power single red line coming from the left hand side of the board is routed in special built-in plastic routing holders and isolated from all other wires. Note that the routing and isolation is critical and must not be altered. In addition, the two insulator sheets are preset and must be in position. After carefully noting the above, remove the HV power supply board by first removing the HV red lead from the bottom holder. You can now lift the board up and rotate it into a position to allow the connectors to be removed. Reconnect the replacement board by carefully removing one wire at a time from the connected board and placing it on the same location on the replacement board. 19 General Parts Replacement All leads must be connected to the new board properly. The HV power line must be isolated and properly routed. Two insulator sheets must be in position and all wiring must be captured to prevent contact with rotating elements. A wiring diagram is included in the service manual for your use. 3. The new board may now be reinstalled in the housing by sliding it back into position. The housing has two board reference ribs molded in the bottom that hold the board in position. Position the board between the side wall and the reference ribs. You may need to hold the board in place before and during installation of the power supply cover. ROTATING ELEMENT WARNING - Unit has a rotating blower wheel and cooling fan to circulate air and keep the unit cool. When servicing the unit and repairing the unit always insure that you keep objects and internal electrical wiring away from the rotating elements. Failure to allow for proper clearance for rotating members can cause electric shock, personal injury or property damage. 4. The power supply cover may now be reinstalled. Check wiring to insure it is routed properly and cannot contact motor fan and is properly isolated. Install the power supply cover by placing the cover locator tabs into the cabinet at an angle while rotating it into place. The locking snap should engage when in the final position. EXTREME HIGH VOLTAGE WARNING - This equipment is supplied with high voltage from a standard electrical wall socket. That voltage is transformed to a 24V signal that is then amplified to over 6000 VDC. In working with the equipment you must always know the voltage level for the equipment and wiring. Attempting to measure or work with the 6000 VDC power without using the proper high voltage probe can cause electrical shock, personal injury or property damage. Measuring high voltage without the proper meter and probe will potentially damage the volt meter. 20 General Parts Replacement 5. To test the power supply, touch the metal shaft of a screwdriver, with an insulated or plastic handle, to one of the contacts while keeping the screwdriver tip about 1/8" away from the other contact. You should see an arc and hear a snapping sound. 6. Reverse step 1. This equipment is supplied with line voltage from a Use standard precautions in working on it with line voltage applied. Failure to practice normal electrical safety precautions can cause electrical shock, personal injury or property damage. ROTATING ELEMENT WARNING - Unit has a rotating blower wheel and cooling fan to circulate air and keep the unit cool. When servicing the unit and repairing the unit always insure that you keep objects and internal electrical wiring away from the rotating elements. Failure to allow for proper clearance for rotating members can cause electric shock, personal injury or property damage. 2. Remove the power supply and disconnect the yellow low voltage leads and white line voltage lead. Remove the black input line to selector switch position 4 using a straightened paper clip inserted into the selector switch connection. 21 General Parts Replacement 3. Remove the two #8/32 lockwasher nuts and remove the transformer and replace it with the new unit. 4. Reverse the above steps 1,2, and 3 to replace the transformer. Bearing Wall Assembly and Blower Wheel Removal and Replacement 1. Follow steps 1, 2, 3, 4 and 5 of Motor Removal and Replacement. 2. The rubber grommet will need to be removed from the motor shaft. This can be done by cu...
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