Toastmaster TECC 4236, TECC 4224 manual Service Instructions Models 4224, Thermostat Calibration

SERVICE ELECTRIC COUNTERTOP CHARBROILER

D.SERVICE INSTRUCTIONS MODELS 4224 & 4236

1.Thermostat Calibration

Before attempting calibration of the thermostat, make sure customer hasn’t allowed a build-up of material or carbonization on the grids and elements. This failure on the customer’s part will cause improper heat transfer, making it seem as though a thermostat failure exists.

In order to perform a thermostat calibration proceed as follow:

a.Place pyrometer thermocouple on cast iron grid.

b.Mold a piece of wet asbestos over thermocouple.

c.Hold thermocouple and asbestos in place with a weight.

d.Turn thermostat to 450°F.

e.Let thermocouple cycle at least twice so that temperature will stabilize.

f.Calibration thermostat, If necessary by:

1.Remove control knob.

2.Insert small thin edge screwdriver into thermostat shaft and engage the calibration screw.

3.To decrease temperature, turn screw clockwise; to increase temperature, turn screw counterclockwise.

4.Repeat calibration procedure until a 450°F 10°F reading is obtained

5.If necessary, instruct customer in the proper care of the meat rack and element cleaning to assure proper heat transfer.

2.Thermostat Replacement

a.Disconnect power supply.

b.Remove grease drawer.

c.Remove control knob.

d.Gain access to bottom of unit.

e.Remove bottom cover of case.

f.Mark and disconnect wire leads to thermostat.

g.Remove two screws holding thermostat to mounting cup.

h.Reverse procedure to install new thermostat.

i.Check for shorts before re-energizing unit.

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