Sterlco GC Series Central Chiller - Manual (Page 25)

GC Series Central Chillers Chapter 3: Installation 25 of 79
Figure 8: Double Riser Detail
3-7 Checking Motor Direction
All of our central chillers have their motor rotations properly phased at the factory. If
compressors, pumps, or fans are running in reverse rotation, disconnect and lock out the
power source and reverse any two power leads into the chiller disconnect switch.
Caution! Do not switch leads at the motors, motor starters, or contactors.
Three-Phase Compressors
Scroll compressors are directionally-dependent and compress in one rotational direction.
Reversing rotation direction results in an elevated sound level and a substantially-reduced
current draw.
Caution! Do not allow the compressor to run backwards for any length of time. Doing
so will result in compressor damage..
Condenser Fan
Air should be drawn through the condenser and discharged vertically from the chiller.