Impinger I -–1000 Series Service Manual - Domestic38
TEMPERATURE CONTROL POTENTIOMETER – REPLACEMENT
1. Remove control panel to p and front cover.
2. Remove one screw from control knob guard and move guard to one side.
3. Remove knob and lock nut on control pot. shaft and push out.
4. Remove three (3) wires f rom temperature control board. Note wire numbers and location.
5. Reassemble in revers e order.
MERCURY CONTACTOR
1. Shut off power at main bre aker.
2. Remove control panel to p and front cover.
3. Disconnect contactor wires and mark for reinstallation.
4. Remove screws from mounting bracket and replace contactor.
NOTE: Be sure contactor is not mounted upside down as this will cause a cons tant on condition.
5. Reassemble in revers e order.
THERMOCOUPLE- REPLACEMENT
1. Remove control panel to p and front cover.
2. Remove cover from relay box.
3. Slide thermocouple out of oven chamber.
NOTE: Remove conveyor and bottom fingers to aid in removal and installat ion of thermocouple.
4. Remove two (2) wires f rom temperature control board. Make note of wire numbers or color and location
for reinstallation.
5. Reassemble in revers e order making sure the metal end on the thermocouple is securely in the wire
form in the oven chamber.
T HERMOCOUPLE MEASUREMENT CHART:
EXPLANATION: The junction temperature is the ambient air temperature wh ere 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 8.26 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