Lincoln 1100 Series Service Manual page 41

6. Install new control board and bracket.
7. Attach wires to their proper terminals, refer to the drawings for proper terminal identification.
8. Perform calibration on the control board as specified using the calibration procedure for your style of board.
NOTE: When a control board, motor, tach. generator, or speed adjustment potentiometer is replaced, the
control board must be calibrated. When calibration of control board is complete, seal the adjustment pots.
(See "Control Board Adjustment")
STYLE 1 CONTROL BOARD ADJUSTMENT
NOTE: A digital meter must be used for this adjustment.
1. Voltage at L1 and L2 terminals of the control board is to be 120 VAC
2. Connect a digital volt meter to terminals A+ and A-, set meter on 200 VDC scale.
3. Turn speed control pot. (on oven control panel) to its maximum speed setting.
4. Turn "MAX", "MIN", and "IR" pots counter clockwise until they stop. (DO NOT turn CL pot.)
5. Adjust "TACH" pot. so the volt meter indicates 130 VDC
6. Adjust "IR" pot. to read between 1.5 and 2 VDC above tach. reading.(Example: If tach. reading would be
130.3 then adjust IR to between 131.8 VDC and 132.3 VDC.)
7. Turn speed control pot. to its minimum speed setting.
8. Adjust "MIN" pot. so the voltmeter indicates between 6 and 10 VDC.
9. Turn speed control dial to obtain a reading of 22 VDC on your meter. Observe for approx. 30 seconds to see
if stable within
10. Check speed of conveyor and adjust time/temp. display if necessary.
11. Seal pots with Glyptol or nail polish.
STYLE 2 AND STYLE 3 CONTROL BOARD ADJUSTMENT
NOTE: A digital meter must be used.
1. Voltage at L1 and L2 terminals of the control board is to be 120 VAC
2. Connect a Digital voltmeter to terminal T1 and T2, set the meter on DC scale.
3. Turn the speed control pot. (on oven control panel) to its maximum speed setting.
4. Adjust the "MAX" pot. so the voltmeter indicates 15.8 to 15.9 VDC.
5. Turn the speed control pot. to its minimum speed setting.
6. Adjust the "MIN" pot. so the volt meter indicates 0.7 to 0.9 VDC.
7. Reset the speed control pot. to its maximum speed setting and check if voltage is still at 15.8 to 15.9 VDC.
Readjust if necessary.
8. Reset the speed control pot. to its minimum speed setting and check if voltage is still at 0.7 to 0.9 VDC.
Readjust if necessary.
9. If readjustment of either the "MAX" or "MIN" pot. was necessary, the opposite must always be checked until
both "MIN" and "MAX" are in proper adjustment.
10. Measure the speed of the conveyor and adjust the time/temp. display if necessary.
11. Seal pots with Glyptol or nail polish.
NOTE: Occasionally a new board (Style 2 and 3 only) is so far out of adjustment that you will be unable to
adjust to the correct voltage. To correct, turn both the "MAX" and MIN" pots 10 turns in either direction and
then 5 turns in opposite direction. This will center the pots and allow them to be calibrated. If after this
procedure, the board will not adjust, it is probably defective.
REVERSAL OF CONVEYOR BELT - D.C. Motor
All ovens leaving our plant are wired to operate conveyors from left to right. To
reverse conveyor direction, use the following procedure.
1. Turn off power and remove conveyor.
2. Remove front control compartment cover.
3. Refer to control board drawing to identify terminal connections.
4. Reverse wires fastened to terminals A+ and A-.
5. Reverse wires fastened to terminals T1 and T2.
Both set of leads must be reversed or oven will run at maximum speed with no speed
adjustment possible.
POTENTIOMETER, CONVEYOR SPEED CONTROL
1. Turn off power.
2. Remove conveyor.
Impinger II –1100 Series Service Manual - Domestic
0.5 VDC. Repeat at 35 VDC.
10%.
0.5 volts.
10%.
41