Technical_reference - 第46页
Technical Service Manual 46 Revision Dat e: August 2004 TOP CELL M OT OR REM OVAL 1. Remove power f rom the oven. 2. Remove the s crew holding the therm ocouple in plac e on the cell fac e. Using a perm anent black m ark…
Technical Service Manual 45 Revision Date: August 2004
BOTTOM CELL MOTOR REPLACEMENT
1. Under the rear of the oven, locate the cell where the motor is to be installed.
2. Assemble three screw assemblies. A screw assembly consists of one 5/32" hex head screw, one flat washer, and
one rubber washer in that order. The rubber washers are to aid in vibration isolation.
3. Using RTV, put a very small dab on each support leg of the motor. Place one rubber washer (not the rubber
washer from the screw assembly in Item 2 above) on the bottom of each motor leg and position them so they are
centered on the screw holes.
4. Put a small amount of RTV into each of the fan mounting holes on the cell plate.
5. Insert one screw assembly into a hole on the motor base and place the motor up against the cell face. CAUTION:
Orient the motor so the wires will reach the terminal block. Center the holes and hand-start the screw.
Tighten it until it is snug.
6. Insert the second screw into a hole on the motor base and hand start it. Tighten it until it is snug.
7. Finally, insert the last motor mounting screw into the last hole and hand start it. Tighten it until it is snug.
8. Using the 5/32" T-handle, tighten all three screws until they are tight and the motor is securely fastened onto the
cell plate.
9. Properly connect the motor wires to the connector block. (Red=L2, Yellow=L3, Blue=L1)
10. Place the fan mounting gauge on the cell on the cell face with the opening of the V facing the rear of the oven and
surrounding the motor shaft. Make sure that the sides of the gauge are between the screws in the cell plate. See
drawing of the fan gauge.
11. Place the matching fan blade onto the motor shaft of the motor just installed. Note that the fan has two setscrews
and the motor shaft has two flats on it.
12. With the fan blade resting on the gauge, tighten the setscrews with a 1/8" hex head bit on a torque wrench set to
50 inch pounds. Remove the gauge by sliding it forward and lifting it out of the cell.
13. Retrieve the heater panel for this cell and lay it into place in the cell. Be careful not to bend the thermocouple wire.
Prop the heater panel up from the front so the heater wires can be reconnected.
14. Reconnect the wires to the panel referring to the SKETCH made when the panel and wires were removed. Use
two 11/32" wrenches to prevent breaking the ceramic block or tear the foil connected to the lower (closest to the
panel) nut on the stud. Reconnect the thermal switch.
15. Carefully place the thermocouple wire in its protective 1/8" vinyl tubing through the correct hole in the panel. If the
thermocouple(s) was NOT marked (circled) before removing the panel, then count three rows from the right and
seven holes from the front to locate the correct hole. If the Oven has the Independent Alarm Scanner (IAS) over-
temperature sensing option, refer to the SKETCH to locate the second thermocouple.
16. After the thermocouples are located in their proper holes, lower the heater panel in place. Remove the vinyl tubing
from the thermocouple(s).
17. Replace the front panel bracket and fasten it down with two Philips type screws. Replace the rear heater panel
bracket and fasten it down with two screws.
18. Replace the left and right ICBs and fasten them down with two Philips type screws each. Refer to your drawing of
ICB placement to adjust them.
19. Carefully bend the thermocouple probes into the proper position under the hold down clamps, and tighten the
clamps screws.(Do NOT use longer screws, they will damage the heater panel)
20. Reconnect the conveyor system. See the procedures for reconnecting rails and chains and reconnecting the belt.
Technical Service Manual 46 Revision Date: August 2004
TOP CELL MOTOR REMOVAL
1. Remove power from the oven.
2. Remove the screw holding the thermocouple in place on the cell face. Using a permanent black marker, circle the
thermocouple on the heater face. Carefully straighten the thermocouple wire and cover it with a piece of 1/8" vinyl
tubing. This will aid in relocating the thermocouple when reassembling the cell later.
3. Remove the four crosshead style screws holding each ICB in place on the sides of the heater panel. Remove the
ICBs.
4. Remove the three crosshead style screws holding the front heater panel bracket. Remove the bracket.
5. If the heater panel does not fall down by itself, using a hex key wrench, carefully insert the short end into a hole in
the heater panel and gently tug down on the heater panel. You may need to use the 3" putty knife to push the
insulation guard clear of the heater panel.
6. Lower the heater panel far enough to gain access to the heater wires on the inside of the cell. Block the panel up
with a 10" 4x4 block of wood to relieve the strain on the wires.
7. Document the wire placement on the connections on top of the heater panel as you will have to replace them later
in the exact same order.
8. Remove the four wires by using two 11/32" wrenches. Use one to hold the bottom nut (closest to the panel)
steady while the other unscrews the top nut to free the wire.
IT IS VERY IMPORTANT TO USE TWO WRENCHES AND HOLD THE BOTTOM NUT STEADY BECAUSE THE
HEATER FOIL IS DIRECTLY ATTACHED TO THE STUD HERE. IF IT TEARS, YOU WILL HAVE TO REPLACE THE
ENTIRE HEATER PANEL. IT CANNOT BE REPAIRED. IN ADDITION, THE CERAMIC BLOCKS ARE FRAGILE AND
EASILY BROKEN.
9. Disconnect the two wires on the thermal switch.
10. Remove the heater panel and set it aside.
11. Remove the fan assembly from the motor shaft. Using a 1/8" hex head wrench, loosen the two setscrews on the
fan blade enough to remove the fan blade from the motor shaft. Save the fan blade to return to Vitronics-Soltec
with the motor.
12. At the rear of the oven, SKETCH the locations of the wires in the terminal block and then remove the wires. Using
a 5/32" hex head wrench or T-handle, remove the three screws holding the motor in place on top of the cell.
13. Remove the fan motor. Tap on the motor to break it loose from the cell.
14. Scrape all RTV off the cell in the motor area. Clean all grease, dirt and RTV from the shaft hole area and the
motor support areas.
Technical Service Manual 47 Revision Date: August 2004
TOP CELL MOTOR REPLACEMENT
1. If they are not already marked with serial numbers, mark the fans and motors so they will not be mixed up.
2. At the rear of the oven, assemble three screw assemblies. A screw assembly consists of one 5/32" hex head
screw, one flat washer, and one rubber washer in that order. The rubber washers are to aid in vibration isolation.
3. Using RTV, put a very small dab of RTV on each support leg of the motor. Place rubber washer (not the rubber
washer from the screw assembly in Item 2 above) on each leg and position them so that they are centered on the
screw holes.
4. Put a small amount of RTV into each of the fan mounting holes on the cell plate.
5. Insert one screw assembly into a hole on the motor base and place the motor up against the cell face. Center the
holes and hand-tighten the screw.
6. CAUTION: Orient the motor so that the wires will reach the terminal block.
7. Insert the second screw into a hole on the motor base and hand-tighten it.
8. Finally, insert the last motor mounting screw into the last hole and hand-tighten it.
9. Using the 1/8" T-handle, tighten all three screws until they are tight and the motor is securely fastened onto the
cell plate.
10. Properly connect the motor wires to the connector block. (Red=L2, Yellow=L3, Blue=L1).
11. At the oven, place the fan mounting gauge in the cell up against the cell face with the opening of the V facing the
rear of the oven and surrounding the motor shaft. Make sure that the sides of the gauge are between the screws
in the cell plate. Hold the gauge in place. See drawing for the fan gauge.
12. Place the matching fan blade onto the motor shaft of the motor that you just installed. Note that the fan has two
setscrews and the motor shaft has two flats on it.
13. With the fan blade resting against the gauge, tighten the setscrews with a 1/8" hex key bit on a torque wrench set
to 50 inch pounds. Remove the gauge by sliding it forward and down out of the cell.
14. Retrieve the heater panel for this cell and set the rear of it into place in the cell between the bracket and the cell.
Be careful not to bend the thermocouple wire. Prop the heater panel up from the front so that you can reconnect
the heater wires.
15. Reconnect the wires to the panel referring to the SKETCH made when the panel and wires were removed. Use
two 11/32" wrenches so NOT break the ceramic block or tear the foil connected to the lower (closest to the panel)
nut on the stud. Reconnect the wires to the over-temperature switch.
16. Carefully place the thermocouple wire in its protective 1/8" vinyl tubing through the correct hole in the panel. If the
thermocouple(s) location was NOT marked (circle) prior to removing the panel, then count four rows from the left
and seven holes (6 visible) from the front to locate the correct hole.
17. Once the thermocouple is located in its proper hole, raise the heater panel in place.
18. Replace the front panel bracket and fasten it with two Philips head screws. Remove the vinyl tubing protecting the
thermocouple(s).
19. Replace the left and right ICBs and fasten them in place with two Philips head screws each. Refer to the sketch of
ICB placement to adjust them.
20. Carefully bend the thermocouple into its correct place and replace the clamp and screw. Tighten the screw.