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Replacing the Lower Fan in the Sievers* 500 RL TOC Analyzer
1.
Purpose:
To replace the lower fan in a Sievers 500 RL TOC Analyzer.
2.
Scope:
This procedure applies to all current Sievers 500 RL Analyzer configurations.
3.
Safety:
This procedure requires access to electrical components of the Analyzer. Be sure to follow
ESD safety precautions, as instructed. This procedure should be performed by personnel
skilled in the maintenance of electromechanical instruments.
You may need the assistance of an electrician to disconnect and reconnect the Analyzer’s
power inlet wiring.
4.
5.
Materials:
•
Lower fan replacement kit
•
ESD strap
•
Long #2 Phillips screwdriver
•
5/16" open-end wrench
Procedure:
5.1 If the Analyzer is taking measurements, press the Stop Analysis button.
5.2 Insert a USB flash memory drive into the port labeled USB on the side of the Analyzer and back up the
current Analyzer settings (Maintenance → Advanced → USB I/O → Save System). For more
information, see the section called “Saving System Settings” in the Analyzer’s Operation and
Maintenance Manual.
5.3 Remove the USB flash memory drive from the USB port and store it in a safe place.
5.4 Turn off power to the Analyzer. Also shut off the circuit breaker for the Analyzer.
5.5 Disable the flow of water to the Analyzer.
5.6 Open the Analyzer door.
5.7 Put on the ESD strap and attach the alligator clip to a metal component of the Analyzer.
5.8 Remove the electrical enclosure cover by loosening the captive screws and pulling the cover away
from the Analyzer.
5.9 Remove the power module bracket.
5.9.1 Disconnect the AC ground wire and the AC power inlet wires from the terminal block (see Figure
1).
GE Analytical Instruments, Inc. ©2005H
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DIN 74820 Rev. A
Kit, Lower Fan Replacement, 500
5.9.2 Disconnect the wiring from the power switch module (see Figure 1). Take note of the cable labels
and positions, as it is important to replace the cables properly. Figure 2 illustrates the correct
positions.
Figure 1: The AC Inlet and Power Switch Module
5.9.3 Disconnect the 24 V power inlet connector from P2 on the Interconnect board.
5.9.4 Cut the wire ties on the fan power line.
5.9.5 Disconnect the lower fan power connector from P5 (Fan 1) on the Interconnect board.
5.9.6 Loosen the captive fasteners that secure the power module bracket to the Analyzer and gently
remove the entire bracket. You will need to guide the bracket around the black power switch
module; if you have difficulty removing the bracket, you may need to first remove the power
switch module by loosening the two screws that secure the switch to the Analyzer.
5.10 Replace the lower fan and restore the power module bracket.
5.10.1 Loosen the four screws on the fan to remove it from the bracket. As you loosen the screws, use
a wrench to prevent the nuts from turning. Retain the screws and nuts after you remove them.
5.10.2 Pull the fan free of the bracket and remove the two fan guards.
5.10.3 Remove the new fan from the packaging.
5.10.4 Set the fan in place, noting the arrows that indicate air flow (the fan blows upward, toward the
top of the Analyzer). The side of the fan with the label should be facing upward; the wiring
should be positioned toward the back of the Analyzer.
5.10.5 Place the fan guards into position and insert the screws down through the fan.
5.10.6 As you secure each screw, use the wrench to prevent the nut from turning.
5.10.7 Route the new fan’s power cable up to the Interconnect board, and attach the power
connector to P5.
GE Analytical Instruments, Inc. ©2005H
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DIN 74820 Rev. A
Kit, Lower Fan Replacement, 500
5.10.8 Secure the fan wire to the brackets with the supplied tie-wraps.
5.10.9 Return the power module bracket to the Analyzer and secure it by tightening the two captive
screws.
5.10.10 Connect the 24 V power inlet connector to P2 on the Interconnect board.
5.10.11 Reconnect the wiring to the power switch module. Refer to Figure 2 for proper placement.
Numbers refer to the label on each wire.
Figure 2: Wiring the Power Switch Module
5.10.12 Replace the AC inlet wiring in the terminal block and replace the ground wire.
5.11 Return the Analyzer to normal operation.
5.11.1 Replace the electrical enclosure cover by tightening the two captive screws.
5.11.2 Remove the ESD strap.
5.11.3 Close the Analyzer door.
5.11.4 Restore power to the Analyzer and resume operation.
*Trademark of General Electric Company; may be registered in one or more countries.
GE Analytical Instruments, Inc. ©2005H
Page 3 of 3
DIN 74820 Rev. A
Kit, Lower Fan Replacement, 500