NOTE Ideal ambient temperature is (70F) 21C). In     cold     climates,     it     is     desirable     to     install     the compressor    within    a    heated    building.        Choose    a    clean, relatively  cool  location,  and  provide  ample  space  around  the unit for cooling and general accessibility.  Place the beltwheel side   toward   the   wall,   leaving   at   least   15"   (380mm)   for   air circulation  to  the  beltwheel  fan.    The  location  should  also  be near   a   source   of   water   and   a   drain   line   to   simplify   piping connections if a water-cooled aftercooler is to be used.  (Note: If   a   detached   receiver   is   to   be   used,   consider   placing   the receiver  outdoors  to  provide  more  effective  heat  dissipation, keeping  in  mind  that  condensed  water  in  the  receiver  may freeze). Provide   adequate   fresh   air   and   exhaust   ventilation from area  in  which  the  compressor  is  located.  Provide  1,000 cu.  ft.  fresh air per minute per 5 horsepower.  Ventilation by gravity or mechanical means is approved. INLET PIPING If  the  air  in  the  vicinity  of  the  compressor  is  unduly dirty or contains corrosive fumes, we recommend piping the air filter/ silencer to a source of cleaner air or use an optional heavy duty filter. If   it   is   found   necessary   to   install   inlet piping,  make  the  line  as  short  and  direct  as  possible  and  as large, or larger than the diameter of the inlet connection at the compressor.    The  inlet  piping  must  increase  in  diameter  for every 50’ (15.25m) of length.  If the total length is between 50’ (15.25m) and 100’ (30.5m).  increase the pipe diameter at the mid-point  in  the  length,  i.e.,  if  the  total  length  is  80’  (24.4m), increase the pipe diameter at the 40’ (12.2m) point.  Attach the air  cleaner  to  the  end  of  the  inlet  air  line,  and  if  the  inlet  is piped outdoors, it should be hooded to prevent the entrance of rain  or  snow.    See  Figure  2-1.    Fine  airborne  dust,  such  as cement and rock dust, require special filtration equipment  not furnished  as  standard  equipment  on  this  compressor.    Such filtration equipment is available from your local Ingersoll-Rand Distributor. Figure 2-1.  Inlet piping arrangement. A  well  ventilated  location  should  be  selected  for  this machine   when   operating   in   very   damp   climates   or   under conditions of high humidity. These  atmospheric  conditions are conducive to the formation of water in the crankcase, and if adequate operation and ventilation are not provided, rusting, oil sludging and rapid wear of running parts will result.  This is particularly   true   when   operating   on   very   intermittent   duty applications. The unit may be bolted to any substantial, relatively level floor or base.  If such a surface is not available.  an adequate base must be constructed.  Should a concrete base be necessary, make certain the foundation  bolts  are  positioned  correctly  to  accept the receiver feet, and that these bolts project at least 1" (25.4 mm) above the surface of the foundation. The  unit  must  be  levelled  and  bolted  in  a  manner which   avoids   pre-stressing   the   receiver   in   order   to   prevent vibration and insure proper operation. The following technique is recommended for anchoring this unit: A. Tighten evenly, and to a moderate torque, the nuts of any three of the four receiver feet.  Check the unit for level.    If  the  unit  is  not  level,  insert  metal  shims,  as shown  in  Figure  2-2,  under  one  or  two  of  the  feet  to obtain level, and retighten the nuts. B. Note  the  distance  the   unanchored   foot   is   elevated above   the   base   and   insert   a   metal   shim   of   equal thickness   under   this   foot   to   provide   firm   support. Shims  must  be  at  minimum  the  same  dimension  as bottom of foot. C. After all shims are  inserted  and  the  unit  is  level,  pull up  the  nuts  on  all  receiver  feet  to  a  moderate  (not excessively tight) torque. D. Check  for  receiver  stress  by  loosing  nuts  (one  at  a time),    and    note    any    upward    movement    of    the mounting  foot.    Any  noticeable  movement  indicates that step B must be repeated. Figure 2-2.  Methods of Leveling Unit. Severe vibration will result when nuts are pulled down tightly and feet are not level. This can lead to welds cracking or fatigue failure of receiver.  This is a very important part of installation. THE  COMPRESSOR  SHOULD  NEVER  BE OPERATED    WHILE    MOUNTED    TO    THE SHIPPING CRATE SKID Step. 5 ELECTRICAL (See electrical diagrams on Page 24). To    avoid    invalidating    your    fire    insurance,    it    is advisable   to   have   the   electrical   work   done   by   a   licensed electrician  who  is  familiar  with  the  regulations  of  the  National Electrical Code and the requirements of the local code. Sizes of copper wire to use for distances up to 50 feet (15.3m) from the feeder-60 Hertz. MOTOR THREE PHASE HORSEPOWER 200v 230V 400V 575V AWG-(75C) AWG-(75C) AWG-(75C) AWG-(75c) 10 8 8 12 14 15 4 6 8 10 20 3 4 8 10 25 1 2 6 8 30 0 1 6 8 page 3 - 831 TM 5-3895-374-24-2 Sizes of copper wire to use for distances up to 50 feet 15.3 m) from the feeder-60 Hertz. MOTOR THREE PHASE HORSEPOWER 200v 230V 400V 575V AWG-(75C) AWG-(75C) AWG-(75C) AWG-(75c) 10 4 6 10 10 15 3 4 8 10 20 1 2 6 8 25 0 1 6 8