Installing A New Heater; Calibrating The Electronic Pressure Controller - ABB PGC2000 Operation And Service Manual

3. Remove the ten screws holding the EPC Control Assembly cover using ABB Tool
TL1009 and remove the cover. Be careful not to damage the flame-proof or explosion-
proof surfaces of the cover or the body of the Control Assembly.
4. Unplug the large ribbon cable from the Control PCB and fold it back to your left
and out of the way (see Figure 8-22).
5. Locate the Sensor PCBs for Zones 1 and 2 (see Figure 8-21).
6. Using 1.5 mm hex socket wrench ABB Tool TL1001/TL1003, remove screws and plates
that mount the Sensor PCBs and set these screws and plates aside for later use.
7. Remove the Sensor PCBs and set them aside for later reinstallation. Do not remove the
Sensor cable connected to the Control PCB.
13. Unplug the heater connector from the Control PCB.
14. Carefully extract the heater from its cavity in the enclosure.
15. Remove the connector from the heater, using a small screwdriver.

Installing a New Heater

1. With the new heater in hand, cut heater leads to 3-1/2 inches long.
2. Strip 1/8 inch of insulation off each heater lead.
3. Install the connector on the leads.
4. Place a thin layer of anti-seize compound on the new heater.
5. Insert the new heater in its cavity in the enclosure, making sure it goes all the way down
in the cavity.
6. Clean any anti-seize compound residue from the enclosure.
7. Plug the heater connector into the Controller PCB.
8. Replace the Sensor PCBs, following steps 3 through 8 of "Installing a Sensor PCB."
9. Reinstall the EPC Control Assembly cover and then insert the ten screws and tighten
them to 16 in.-lb, using ABB Tool TL1000/TL1002. Ensure that the flame-proof or
explosion-proof surfaces of the cover or the body of the Control Assembly are not
damaged.
10. Reinstall the EPC cover panel and insert the two holding screws.

CALIBRATING THE ELECTRONIC PRESSURE CONTROLLER

The EPC should only require calibration if a component has been replaced. You should only
need to calibrate the particular zone affected by the servicing. To calibrate a zone:
1. Determine the zone that needs calibration.
2. Open the isothermal oven door.
8-50 2000-OSM, F2