Removing The Heater; Installing A New Heater; Fid Amplifier Assembly - ABB PGC5000 Series Service Instructions Manual

PGC5000
PGC5000 Series Service Instructions

6.6.10 Removing the heater

Be sure that the EPC Control Assembly has cooled to ambient temperature (approximately one hour)
before proceeding.
Use an ESD Wrist strap and proper grounding procedures before handling any components in the EPC
Control Assembly.
1. Perform the "Preparation" procedure.
2. Remove the four screws holding the top panel on the front of the oven.
3. Remove the ten screws holding the EPC Control Assembly cover and retain the screws for later use.
4. Unplug the large ribbon cable from the Control PCB and fold it back to your left and out of the way.
5. Locate the Sensor PCBs for Zones 1 and 2 (see Figure 6.9).
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.
8. Unplug the heater connector from the Control PCB.
9. Carefully extract the heater from its cavity in the enclosure.
10. Remove the connector from the heater, using a small screwdriver.

6.6.11 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. 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 Control Assembly cover and then insert the ten screws and tighten them to 16 in.-lb, using ABB Tool
TL1000/TL1002.
11. Reinstall the top panel and tighten the four screws.
6.7 Flame ionization detector amplifier assembly
In the Class B Oven, the FID Amplifier Assembly is attached to inside of electronics compartment door (left side of oven) on the
center section of the door. In the Class C Oven, it is attached to inside of upper electronics compartment door (left side of
oven), on the upper section of the door. Dual Detectors are located on upper section of lower door.
Removal and replacement:
1. Remove cables using proper tools. If necessary, tag the cables to ensure they are returned to the correct places.
2. Remove the FID coaxial cable from the right side of the assembly.
3. Remove the nuts at the left side of the amplifier mounting plate.
4. Remove the nuts at the right side of the amplifier mounting plate.
5. Remove FID amplifier assembly by sliding the mounting plate to the right.
6. Install replacement FID amplifier assembly.
7. Reinstall all nuts and tighten.
8. Reinstall the coaxial cable on the right side of the assembly.
9. Attach all other cables.
10. Test.
SI/PGC5000-EN, rev B
6 Component repair
47