American Dryer Corp. AD-840 - Manual (Page 39)

American Dispensing Company 88 Currant Road / Fall River, MA 02720-4781
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NOTE: The alarm buzzer will sound for a few seconds until the U.V. lamp and quartz sleeve reaches operating
conditions.
U.V. SENSOR PROBE REPLACEMENT INSTRUCTIONS
Step 1: Disconnect the power and water supply to the U.V. sterilizer. Drain the water from the U.V. chamber.
a) Remove the two screws, one from each end of the electrical subassembly to remove the
cover.
b) Unplug the U.V. sensor probe interface board along with the temperature sensor plug from
the relay board.
c) Remove the black wire of the U.V. sensor harness from the ground lug by removing the
3/8” nut.
Step 2: Undo the large brass nut holding the U.V. sensor probe in place also remove the temperature sensor
from the U.V. chamber. (refer to illustration [diagram 21]). Use a 7/16” wrench to remove the
acorn nut and clip holding the U.V. sensor harness and temperature sensor in place. (refer to
illustration [diagram 21]). A 15/16” wrench will be required to loosen the brass nut. Remove the
U.V. sensor probe with the O-ring.
Step 3: Unplug the U.V. sensor probe interface board along with the temperature sensor plug from the relay
board found in the internal component area.
diagram 21