channel  it  into  the  rotating  hamper.  The  warmed  air picks  up  moisture  from  the  laundry,  as  it  passes through  the  hamper.  The  blower  finally  directs  the moisture-laden air through a lint filter that traps most of  the  dry,  lightweight  particles  of  lint  and  other foreign materials picked up by the moving air before the air is discharged from the dryer. The  heating  assembly  in  an  all-electric  dryer consists of a set of nichrome heating elements situated in the forced-air steam. The heating assembly in a gas dryer  performs  exactly  the  same  function,  but  it  uses gas flame heat. The  electrical  sections  of  modern  clothes  dryers can be rather simple compared to some other kinds of modern  appliances.  The  basic  electrical  units  of  a dryer  include  heating  controls  that  maintain  a  fairly constant  drying  temperature  and  a  timer  mechanism that turns off the dryer at the end of a selected drying interval.  The  essential  differences  between  the simpler dryer models and the top-of-the-line versions can be found in the number and types of heat and timer controls. All automatic dryers include a basic cycle that is normally labeled a "Timed Cycle"” on the timer control knob. When operation is done in this mode, the dryer tumbles the laundry continually and regulates the level of the forced air throughout the entire drying interval. The tumbling and heating actions both stop at the end of  the  selected  drying  time.  You  can  set  the  drying interval  to  any  point  between  zero  and  about 180 minutes, depending on the amount and wetness of the load. Operation Automatic   clothes   dryers   operate   on   a   simple principle, involving the following essential parts: An exhaust fan A perforated metal drum Automatic  controls An electric motor to rotate the drum A source of heat—either gas or electric. In operation, wet or damp clothes are placed into the drum, and after the door is closed, the thermostatic control is set to the correct heat level; the timer is also set to the desired running time. The best temperature and running time combination depends on the type of clothing, the material of which it is made, the weight of the clothing, and the amount of water it contains. The correct   combination   for   various   loads   is   normally indicated  on  a  chart  near  the  control  knobs;  if  not, consult the owner's manual. Once the correct control combination has been set, the drum begins to rotate at about 50 revolutions per minute,  and  the  heat  turns  on  to  start  the  drying function.  Air  circulation  is  provided  simultaneously by  the  motor-driven  fan,  circulating  the  heated  air through the clothing. Baffles on the sides of the drum tend to carry the clothes to the top of the dryer drum, at which  time  they  drop  to  the  bottom.  These  baffles prevent the clothes from lumping together and provide a  tumbling  action  that  speeds  up  the  drying  process. The door may be opened at any time during the cycle. When  the  controls  are  functioning  properly,  any opening of the dryer door stops the dryer cycle, turning off the heater and other motors. If more time remains in the cycle, the drying action resumes when the door is closed; in some cases, the start button must be pressed. Although a motor drive belt may break from time to time or a bearing becomes jammed, most problems involving  automatic  clothes  dryers  are  in  the  automatic controls.  In  most  cases,  the  contacts  become  worn, wiring becomes short-circuited or open, and so on. Installation When installing a dryer, either a new one or one that   has   been   repaired,   observe   all   codes   and ordinances  that  apply  to  the  particular  dryer.  The information  below  will  help  you  in  installing, repairing,  and  locating  a  dryer.  Leave  enough  space around  the  dryer  for  ease  of  installation,  use,  and service. If  the  dryer  is  to  be  installed  in  a  confined  area, such as a closet or bathroom, it must be exhausted to the  outside.  Furthermore,  it  must  have  enough  space around   it   and   enough   air   circulation   to   operate properly. The  electric  service  should  conform  with  the National  Electric  Code  as  well  as  local  codes  and ordinances. When gas is used as the heat source, the installation  must  conform  to  the  National  Fuel  Gas Code and local codes and ordinances. Never  exhaust  the  dryer  into  a  chimney  or  any other  duct  or  vent.  The  dryer  must  have  its  own exhaust  system.  Before  putting  a  dryer  into  use  after installing  or  servicing,  replace  all  access  and  service panels. If still attached, read and follow all caution and direction labels attached to the dryer. While  servicing,  review  the  wiring  diagram  that accompanies   the   dryer.   This   diagram   is   usually 5-31