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TEMPERATURE CONTROLLER - TM-5-3895-374-24-2_308
OPERATING AND INDICATING LIGHTS

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 In the "OPERATOR" mode the controller has the display option programmed into it such that the process  or  hot  oil  temperature  and  the  current  set  point  are  displayed  simultaneously.    This option informs the user of these two pieces of information on a continuous basis. The  other  keys  on  the  controller  are  used  to  access  the  other  modes  ("CALIBRATION"  and "TUNE").    A  detailed  explanation  of  all  the  operating  modes  in  the  temperature  controller  is presented in SECTION 6.Z: HEATER COMPONENTS TEMERATURE CONTROLLER. The  set  point  temperature  on  the  ECLIPSE  Model  2004  serves  two  purposes.    First,  it  is  the temperature around which the burner will turn on and shut off.  It is factory set to have the burner come on at 20°F below the set point and shut off at 5F above the set point.  Second, the set point temperature is the temperature around which the burner will modulate (i.e.  change firing rates).  The burner will begin to modulate from its full firing rate (i.e.  high fire) at 15F below the set point.  It will be at its lowest firing rate at approximately the set point.  The following example should help clarify the role of the set point as temperature is increasing. (page 3 - 943)







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