Removing The Catalytic Tubes; Installing The Catalytic Tubes - ABB PGC2000 Operation And Service Manual

Wait 30 minutes before proceeding to open the Methanizer/Air Cleanup Assembly.
11. Mark the top and bottom caps and housing with a grease pencil or permanent marker. When the
caps are replaced with the marks aligned, the support bracket holes will be correctly aligned.
12. Using a 9/64-inch Allen wrench, remove the four Allen head screws attaching the air
cleanup/methanizer top cap to the outer housing.
13. Grasp the housing and top cap. Withdraw the internal body assembly from the housing.
14. Using tweezers or a small screw driver, remove the insulation from around the body assembly.
Retain it for later use.

Removing the Catalytic Tubes

1. Using a 1/4-inch open-end wrench, disconnect the catalytic connections from the bottom side of
the cap.
2. To remove a catalytic tube, remove the Phillips head screw and flat washer located in the center
of the body at the opposite end from the harness.
3. Grasp the long coiled or "pig tail" end of the tubing and pull the short nutted end through the body
assembly.
4. Repeat steps 2 and 3 for the second catalytic tube, if it is present.
5. Carefully rotate the body assembly and remove the Phillips head retaining screw and flat washer.
6. Note the location of the cartridge heater, temperature probes and thermocouple. Carefully extract
cartridge heater, probes and thermocouple from air cleanup body.
7. Inspect the probe end of the wiring harness for damage. If any harness wiring or devices are
damaged, replace the harness as described in "Packing the Housing" and "Installing the
Methanizer/Air Cleanup Assembly."

Installing the Catalytic Tubes

1. To install the air cleanup tube, insert the short end of the catalytic air tube through the larger tube
passage of the body and align it with the inside air inlet port connection of the top cap.
2. To install the methanizer tube, insert the short end of the catalytic methanizer tube through the
smaller tube passage of the body and align it with the inside methanizer inlet port connection.
3. Insert the tube fitting into the cap and tighten the inlet fitting nut finger tight.
4. Repeat step 3 for the second catalytic tube, if applicable.
5. Assemble the flat washer and screw.
6. Insert the flat washer retaining screw assembly into the center hole located in the end of the body
assembly opposite the harness and tighten it with the Phillips screwdriver.
7. If a new tube is being installed, a small loop or "pig tail" should be coiled in the tubing to
compensate for the excess tubing length. If installing an existing tube, the pig tail will already be
present.
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CAUTION
2000-OSM, F1