SterlingTek A0551797 User Manual

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                         SSC Series Central Chilling Stations 
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SSC Series condensing pressure 
with 95ºF (35ºC) condenser air 
R-22 = 260 psi (1,793 kPa/17.93 bars) 
 
Note:  Due to the variables involved in remote air-cooled condenser installations, no set or 
standard piping procedure exists. Each installation must be designed and installed by 
qualified persons. Follow the instructions supplied with the condenser. 
 
 
3-11  Checking Motor Direction 
Compressor 
Note:   
 
  Never switch contactor leads or motor leads for reversing 
rotation. 
  Do not use contactor or motor leads for phase matching. 
  Compressor noise from reverse rotation is noticeable. Do not 
run in this mode for more than ten (10) seconds. The 
compressor shuts off if run longer in this mode. 
  Reverse rotation can cause suction and discharge pressures to 
be approximately equal; amp draws will be lower than normal
  If you discover that compressor rotation is reversed, correct it 
by switching any two main power leads into the disconnect 
switch or distribution block
 on the unit. 
Water Pump 
A positive pressure of 20 to 30 psi (137.9 to 206.8 kPa/1.38 to 2.07 
bars) on the 
TO PROCESS
 line indicates correct pump rotation. 
 
Condenser Fan 
On SSC Series remote air-cooled units, air should draw through 
the condenser and discharge up from the condenser. 
 
Changing fan rotation direction 
  Disconnect and lock out power at the fused disconnect. 
  If all fans are going backwards, reverse any two main power 
leads. 
  If only some of the fans are going backwards, switch any two of 
their respective motor leads.