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TEST CHECKOUT PROCEDURES
Typical Scanner Installations

TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 FLAME SAFEGUARD Scanner Wiring Care should be taken to see that ignitor cables and scanner cables are routed away from one another on all  installations.  These  cables,  when  crossed  or  run  together,  may  interfere  with  the  proper  operation  of the flame safeguard control. If  you  are  experiencing  erratic  operation  or  inappropriate  characters  on  the  display  during  the  trial  for ignition period, the cause is likely to be ignitor noise.  Check for worn ignitor cable insulation, broken or cut insulation or loose connectors at the electrode and transformers. INSTALLATION - UV  SCANNERS CAUTION:  The  UV1,  UV2,  UV8,  and  45UV3  ultra-violet  name  scanners  and  associated  amplifier modules are non-self-checking UV systems and should be applied only to burners that cycle often (e.g.    a  minimum  of  once  per  12  hours)  in  order  for  the  safety  checking  circuit  to  be  exercised. (see  Operation).    If  component  checking  is  required  during  burner  operation  for  constantly  tired burners,  utilize  the  self-checking  ultra-violet  name  scanners  (45UV5)  and  associated  amplifier module (EUVS4). Where possible, obtain the burner manufacturer’s instructions for mounting the scanner.  This information is available for most standard burners.  The scanner mounting should comply with the following general instructions: 1. Position  the  UV1,  UV2  scanner  within  18  inches  of  the  flame  to  be  monitored;  the  45UV5  within  30 inches, closer if possible. 2. Select a scanner location that will remain within the ambient temperature limits of the UV Scanner. If cooling  is  required,  use  an  insulating  coupling  (Fireye  #35-9  for  UV1,  UV2  Scanners,  35-127-1  for 45UV5) to reduce conducted heat. 3. The UV1, UV2,45UV5 Scanners are designed to seal off the sight pipe up to 1 PSI pressure.  Higher furnace pressures should be sealed off.  To seal off positive furnace pressure up to 100 PSI for UV1 UV2  Scanners,  install  a  quartz  window  coupling  (#60-1257)  For  45fUV5  Scanners,  use  #60-1100 coupling.  Add cooling air to reduce the scanner sight pipe temperature. 4. Install the scanner on a standard NPT pipe (UV1 1/2" UV2: 3/8", 45UV5: 1-) whose position is rigidly fixed.  If the scanner mounting pipe sights through the refractory, do not extend it more than halfway through.      Swivel   flanges   are   available   if   desired   (#60-302   for   UV1   UV2   Scanners,   #60-1664-3 for45UV5).  The sight pipe must permit an unobstructed view of the pilot and/or main flame, and both pilot and main flames must completely cover the scanner field of view. page 3 - 1057







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