MODEL TCL

SECTION 10 MAINTENANCE

10.3.5Replacing the air pump diaphragm and check valves.

1.Disconnect power to the analyzer.

2.Refer to Figure 10-12. Disconnect the reagent and air injection tubes. Disconnect the suction and discharge tubing by turning the Luer fitting in the direction shown in the figure. Disconnect the air pump inlet tubing from the barbed fitting in the bottom of the enclosure.

WARNING

HAZARDOUS

VOLTAGE

CAN CAUSE SEVERE INJURY OR DEATH.

DISCONNECT POWER BEFORE SERVICING.

9241136/B

3.Remove the four screws (circled in Figure 10-13) holding the air pump access panel. Pull out the pump and panel.

4.Disconnect the air inlet and outlet tubing from the air pump. See Figure 10-14.

5.Remove the five screws (surrounded by squares in Figure 10-13) holding the air pump to the access panel.

6.Pull the rubber base off the pump.

7.Using needle nose pliers, remove the air inlet fitting from the side of the air pump. See Figure 10-16.

8.Slide the pump assembly out of the air pump body. See Figure 10-17.

9.Following instructions on the package (PN 9160518), replace the diaphragm and check valves.

10.Slide the pump assembly back into the pump body and replace the barbed inlet fitting.

11.Replace the rubber base and screw the pump access panel back onto the air pump.

12.Connect the air inlet and outlet tubing to the air pump. See Figure 10-14. The conical end of the check valve points in the direction of the air flow.

13.Replace the air pump access panel.

14.Connect the sample pump tubing to the pump. Connect the reagent and air injection tubing. Connect the air inlet tubing to the barbed fitting at the bottom of the enclosure.

FIGURE 10-16.

FIGURE 10-17.

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Emerson TCL instruction manual Replacing the air pump diaphragm and check valves
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TCL specifications

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