American Dryer Corp. ML-75HS - Manual (Page 42)

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Electrically Heated Dryers
a. Check to insure that electric oven/contactor assembly is activating.
4. Make a complete operational check of ALL safety related circuits:
a. Door Switch(es)
b. Hi-Limit thermostats
c. Sail switch (for Gas & Electric Models Only)
NOTE: To check for proper sail switch operation (for Gas & Electric Models Only), open the
main door and while holding main door switch plunger in, start dryer. Dryer should start
but heat circuit should not be activated (on). If the heat system is activated, the sail
switch is improperly adjusted and must be adjusted by bending the actuator arm of the
sail switch toward the burner box. If the actuator arm is bent too far toward the burner box
of the dryer, the dryer may not have heat when needed. After any adjustment to the sail
switch, the above procedure must be repeated to verify proper operation of the sail
switch.
5. The dryer should be operated through one (1) complete cycle to assure that no further adjustments are
necessary and that ALL components are functioning properly.
IMPORTANT: The dryer basket (tumbler) is treated with a protective coating. ADC suggests
tumbling old clothes or material in the basket (tumbler), using a mild detergent
to remove the protective coating.
6. Make a complete operational check of ALL operating controls.
a. For Microprocessor model check controller (computer) programs/selections...
1) Each microprocessor controller (computer) has been preprogrammed by the factory with the
most commonly used parameter (program) selections. If computer program changes are required,
refer to the computer programming manual which was shipped with the dryer.
7. Check the electric service phase sequence (three-phase [3ø] models only). While the dryer is operating,
check to see if the blower wheel (impeller/fan) is rotating in the proper direction. Looking from the front, the
blower wheel (impellor/fan) should spin in the clockwise direction. If it is, the phasing is correct. If the phasing
is incorrect, reverse two (2) of the three (3) leads at connections L1, L2, L3 of the power supply to the dryer.
IMPORTANT: If the blower wheel (impellor/fan) is rotating in the wrong direction, this will not
only drastically reduce drying efficiency, but it can also cause premature
component failure.