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TEMPERATURE CONTROL POTENTIOMETER, 0-2.5K OHMS, 1 TURN
1. Shut off power at main breaker.
2. Remove front control box cover.
3. Loosen and remove temperature control knob.
4. Remove hex nut and washer then remove pot from rear of compartment.
5. Remove and mark wiring for replacement.
6. Replace in reverse order.
7. Recalibrate the dial. (See “Temperature Control”)
THERMOCOUPLE PROBE
The sensor bulb is located in the oven compartment behind the lower finger, and held
in position by a wire form holder.
CAUTION: ALLOW OVEN TO COOL
1. Shut off power.
2. Remove conveyor and lower finger.
3. Remove control compartment covers
4. Remove sensor bulb from the wire form holder, pull thermocouple out of the oven through the access tube
and disconnect leads from terminals 6 and 7 of the temperature control board.
5. To install, push thermocouple bulb through the access tube and place in wire form
holder. Be sure that wire form holder is exerting enough pressure on the sensor
bulb to hold it in place. If sensor bulb is not held securely, replace the wire form holder or bend the holder
slightly to hold sensor bulb in place.
6. Reconnect RED lead to terminal 7(-) and WHITE lead to terminal 6(+).
7. Replace conveyor and fingers.
THERMOCOUPLE MEASUREMENT CHART:
EXPLANATION: The junction temperature is the ambient air temperature where the
thermocouple fastens to the electronic temperature control board.
O V E N T E M P
200°F 250°F 300°F 325°F 350°F 400°F 425°F 450°F 500°F 550°F 600°F
J
90°F 3.26 4.77 6.30 7.06 7.83 9.37 10.14 10.91 12.46 14.00 15.53
U
88°F 3.32 4.83 6.36 7.12 7.89 9.43 10.20 10.97 12.51 14.05 15.59
N
86°F 3.37 4.88 6.41 7.17 7.94 9.49 10.26 11.03 12.57 14.11 15.65
C
84°F 3.43 4.94 6.47 7.23 8.00 9.54 10.31 11.09 12.63 14.19 15.71
T
82°F 3.49 5.00 6.53 7.29 8.06 9.60 10.37 11.14 12.69 14.23 15.76
I
80°F 3.55 5.06 6.59 7.35 8.12 9.66 10.43 11.20 12.74 14.28 15.82
O
78°F 3.60 5.11 6.64 7.40 8.17 9.72 10.49 11.26 12.80 14.34 15.86
N
76°F 3.66 5.17 6.70 7.46 8.23 9.77 10.55 11.32 12.86 14.40 15.94
75°F 3.69 5.20 6.73 7.49 5.26 9.80 10.57 11.35 12.89 14.43 15.97
74°F 3.72 5.23 6.76 7.52 8.29 9.83 10.60 11.37 12.92 14.46 15.99
72°F 3.78 5.29 6.82 7.58 8.35 9.89 10.66 11.43 12.97 14.51 16.05
T
70°F 3.83 5.34 6.87 7.63 8.40 9.95 10.72 11.49 13.03 14.57 16.11
E
68°F 3.89 5.40 6.93 7.69 8.46 10.00 10.78 11.55 13.09 14.63 16.17
M
66°F 3.95 5.46 6.99 7.75 8.52 10.06 10.83 11.61 13.15 14.69 16.23
P
64°F 4.01 5.52 7.05 7.81 8.58 10.12 10.89 11.66 13.20 14.74 16.28
62°F 4.06 5.57 7.10 7.86 8.63 10.18 10.95 11.72 13.26 14.80 16.34
60°F 4.12 5.63 7.16 7.92 8.69 10.24 11.01 11.78 13.32 14.86 16.40
Impinger II - 1100 Series Service Manual - International52