Teledyne gfc 7000ta Removing/Replacing the GFC Wheel, Opening the GFC Wheel Housing

Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer

10.6.2. Removing/Replacing the GFC Wheel

When removing or replacing the GFC Wheel it is important to perform the disassembly in the following order to avoid damaging the components:

1.Turn off the analyzer.

2.Remove the top cover as described in “Getting Started” Section 3.1.

3.Open the instrument’s hinged front panel.

4.Locate the GFC wheel/motor assembly (see Figure 3-3).

5.Unplug the following electronic components:

∙The GFC wheel housing temperature sensor;

∙GFC wheel heater

∙GFC wheel motor power supply

∙IR source

6.Unscrew the purge gas line hex nut and remove the 1/8 inch FEP purge gas line.

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7

8

9

Figure 10-11: Opening the GFC Wheel Housing

7.Remove the two (2) screws holding the opto-pickup printed circuit assembly to the GFC wheel housing.

8.Carefully remove the opto-pickup printed circuit assembly.

9.Remove the four (4) screws holding the GFC wheel motor/heat sink assembly to the GFC wheel housing.

10.Carefully remove the GFC wheel motor/heat sink assembly from the GFC wheel housing.

Teledyne Analytical Instruments 252