American Dryer Corp. AD-100 - Manual (Page 23)

OVEN RELAY CONTACTOR(S):
The contactor(s) control the power supply to the
elements. They are located in the power distribution box (Page 9-18, Figure 6).
1. To replace contactors
a. Remove screws from distribution box cover and remove cover,
b. Loosen cable connector screws and remove cables.
c. Remove wire leads from auxiliary power connections and relay
coil.
d. Remove hardware holding contactor and ground lug to wall.
e. Replace by reversing the procedure.
AUTOmilC STEAfI VALVE:
This valve controls the flow of steam to the heat
exchangers (Page 9-20, Figure 8).
TO REPiJ\CE SOLENOID:
a. Remove operator's control panel and disconnect solenoid wire
leads from terminal board.
b. Remove snap ring from valve solenoid cover and remove solenoid
housing from valve.
c. Separate solenoid by pulling wire leads out of BX conduit until
wire splices are exposed.
d. Cut and remove solenoid with its leads and splices.
e. Strip wire ends and resplice to new solenoid leads.
f. Replace by reversing the procedure.
HEAT EXCHANGER:
T w ° heat exchangers are side mounted to a central plenum.
They are identical in construction, interchangeable, and easily replaced or
repaired. Care should be exercised to avoid stressing the copper construction
during installation. Flexible couplings should be provided at inlet and
outlets, especially for machines equipped with the reversing tumbler option.
Additional installation details are shown on Page 10-7. Together they deliver
356,000 btu/hr. when operating at high pressure (125 p.s.i.) or 235,000 btu/hr.
operated at low pressure (15 p.s.i.). The steam supply required is 408 Ibs/hr.
at high pressure, or 234 Ibs/hr. at low pressure. The approximate temperature
of the air entering the tumbler is 285°F at high pressure or 200°F at low
pressure. The super steam heat exchangers are of similar construction.
Together they deliver 535,000 btu/hr. when operated at high pressure (125 p.s.i.)
or 335,000 btu/hr. operated at low pressure (15 p.s.i.). Corresponding steam
supply requirements and tumbler entrance air temperatures are 616 Ibs/hr. and
2650F at high pressure, or 358 Ibs/hr. and 197°F at low pressure. The standard
model is equipped with a 1 HP motor drive blower and requires an air supply of
1,500 cubic feet per minute. The super steam model is equipped with a 3 HP
motor and requires an air supply of 2,500 cubic feet per minute.
1. To replace heat exchanger
a. Shut off steam supply.
b. Start dryer to relieve inlet steam pressure.
c. Turn power off.
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