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Program Chart
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Automatic Operation
washer   itself   (fig.   5-18).   This   thermostat   can control   two   temperature   settings,   the   high temperature  for  washing  and  the  low  temperature for  sour.  The  low  temperature  is  controlled  by turning  the  black  pointer  on  the  thermostat  to  the desired  temperature  setting.  Once  the  temperature control slot is reached on the program chart, hot water is added to the washer and tempered with cold water to reach the desired temperature you set  on  the  thermostat.  The  desired  temperature will  always  be  the  lower  temperature  on  the  Navy wash  formula. To  set  the  high  temperature,  move  the  red pointer  on  the  thermostat  to  the  high  temperature setting  on  the  wash  formula.  During  the  break suds, hot water is admitted into the washer. The hot water stops when water levels are reached and then steam is admitted until the high temperature is  reached.  The  third  pointer  in  the  thermostat indicates the actual temperature in the washer. Water  Levels Water levels in the washer are controlled by slots  5  through  7  on  your  program  chart  (fig. 5-17).   Wash   formulas   are   based   on   certain amounts of water. If the amounts are other than indicated, your concentration of supplies will not be correct. Water levels are preset at the factory; however,   they   may   have   to   be   adjusted   to conform  to  Navy  wash  formulas.  Water  levels should be reached before steam is admitted into the  washer.  If  you  notice  steam  being  admitted into the washer before water levels are reached, the  cutting  of  the  program  chart  should  be rechecked. Figure 5-18.—Washer extractor temperature control. Automatic  Supply The  automatic  injection  of  supplies  into  the water is done by slots 11 and 12. The automatic supply bins that are located on the right side of the washer extractor contain four bins. Navy wash formulas  I  and  II  require  three  supplies  and  Navy wash  formula  III  requires  two  supplies.  Therefore, you will only use two bins because sour and starch can  be  added  together.  This  means  only  two  of the  four  slots  on  the  program  chart  will  be  cut to  allow  these  supplies  into  the  washer  drum. SAFETY  FEATURES All laundry personnel should be familiar with washer   extractor   safety   features   to   prevent personal injury and/or damage to equipment. The laundry  supervisor  should  prepare  a  locally prepared  document  that  covers  all  safety  features noted  in  the  equipment  technical  manual.  The safety features listed below are generally true for all models; however, check your technical manual for  any  additional  safety  features. 1.  During  the  wash  cycle  the  washer  extractor will  cut  off  if  the  outer  shell  door  is  opened. 2.  The  outer  shell  door  of  the  washer  extractor will not open during the extract cycle because of an  interlock  switch. 3. Both hands must be used to operate the jog switches  on  the  control  panel. 4. The control switch on the control panel or the master switch on the programmer can be used as  emergency  stops. 5.  The  vibration  switch  is  installed  to  stop incorrectly  loaded  machines  during  extract. 6. The air pressure switch will not allow the machine to operate on less than 50 pounds of air pressure for the wash cycle and 80 pounds of air pressure  for  extract. 7. The automatic brake engages during power loss  or  emergency  stop. 8.  The  positioning  interlock  switch  is  installed to  eliminate  the  possibility  of  having  the  wash motor activate while the outer shell door is open. PREOPERATIONAL  CHECKS Before actually operating the washer extractor, be  sure  you  are  ready  by  doing  the  following:   Check your steam supply (100 pounds is ideal). 5-24

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