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CG-SVX17D-EN
CGAM Operating Principles
Refrigerant Cycle
The refrigeration cycle of the Model CGAM chiller is conceptually similar to other Trane air-cooled
chiller products. The CGAM chiller uses a brazed plate evaporator and an air-cooled condenser. The
compressors use suction gas cooled motors and an oil management system to provide almost oil-
free refrigerant to the condenser and evaporator for maximum heat transfer while lubricating and
sealing compressor bearings. The lubrication system helps to assure long compressor life and
contributes to quiet operation.
Refrigerant condensers in the air-cooled heat exchanger which is available in three
configurations—slant, V and W—based on the CGAM nominal tonnage cooling capacity. Liquid
refrigerant is metered into the brazed plate evaporator using an electronic expansion valve to
maximize chiller efficiency at full and part load operation.
The CGAM chiller is equipped with a unit-mounted starter and control panel. Microprocessor-based
unit control modules (Trane Tracer™CH530) provide accurate chilled water control and provide
monitoring, protection and adaptive limit functions. The adaptive nature of the controls
intelligently prevent the chiller from operating outside of its limits, or compensates for unusual
operating conditions while keeping the chiller running rather than simply shutting off the chiller.
If problems do occur, the CH530 controls provide diagnostic messages to help the operator in
troubleshooting.
Refrigerant Cycle Description
The CGAM refrigeration cycle is described using the pressure-enthalpy chart shown in
Figure 76.
Key State Points 1 through 5 are indicated on the chart. A schematic showing refrigerant
components throughout the system is shown in
Figure 77
.
Refrigerant evaporation occurs in the brazed plate evaporator. Metered refrigerant vaporizes as it
cools the chilled water or liquid flowing through the evaporator passages. The refrigerant vapor
leaves the evaporator as superheated gas. State Point 1.
Refrigerant vapor generated in the evaporator flows to the compressor suction manifold where it
enters and flows across the compressor motor windings to provide cooling. The vapor is then
compressed in the compressor scroll chambers and discharged. Oil from the compressor sump
lubricates the bearings and seals the small clearances between the compressor scrolls. Refrigerant
vapor is discharged to the air-cooled condenser at State Point 2.
After the refrigerant vapor condenses into liquid (State Points 3 and 4) it is returned to the
evaporator (State Point 5) where the refrigerant again flashes into vapor and the refrigeration cycle
repeats.
Summary of Contents for CGAM
Page 44: ...44 CG SVX17D EN Installation Mechanical Figure 39 CGAM W 80 120 Ton Rigging X Z Y ...
Page 104: ...104 CG SVX17D EN CGAM Operating Principles Figure 79 10 15 Ton Compressor Internal Components ...
Page 105: ...CG SVX17D EN 105 CGAM Operating Principles Figure 80 15 30 Ton Compressor Internal Components ...
Page 135: ...CG SVX17D EN 135 Controls Interface Figure 87 Diagnostic View ...
Page 149: ...CG SVX17D EN 149 Unit Start Up Procedures Figure 95 Power Up to Starting ...
Page 185: ...CG SVX17D EN 185 Unit Wiring S2075 1 20 35 Ton Slant Frame Table of Contents ...
Page 186: ...186 CG SVX17D EN Unit Wiring S2075 2 20 35 Ton Slant Frame Legend ...
Page 187: ...CG SVX17D EN 187 Unit Wiring 20 35 Ton Slant Frame Legend ...
Page 188: ...188 CG SVX17D EN Unit Wiring S2075 3 20 35 Ton Slant Frame Notes ...
Page 189: ...CG SVX17D EN 189 Unit Wiring 20 35 Ton Slant Frame Notes ...
Page 190: ...190 CG SVX17D EN Unit Wiring S2075 4 20 35 Ton Slant Frame Compressor Power Circuit 1 ...
Page 191: ...CG SVX17D EN 191 Unit Wiring 20 35 Ton Slant Frame Compressor Power Circuit 1 ...
Page 192: ...192 CG SVX17D EN Unit Wiring S2075 6 20 35 Ton Slant Frame Fan Power Circuit 1 ...
Page 193: ...CG SVX17D EN 193 Unit Wiring 20 35 Ton Slant Frame Fan Power Circuit 1 ...
Page 194: ...194 CG SVX17D EN Unit Wiring S2075 8 20 35 Ton Slant Frame Pump Power Control ...
Page 195: ...CG SVX17D EN 195 Unit Wiring 20 35 Ton Slant Frame Pump Power Control ...
Page 196: ...196 CG SVX17D EN Unit Wiring S2075 9 20 35 Ton Slant Frame Compressor Control ...
Page 197: ...CG SVX17D EN 197 Unit Wiring 20 35 Ton Slant Frame Compressor Control ...
Page 198: ...198 CG SVX17D EN Unit Wiring S2075 10 20 35 Ton Slant Frame Fan Control 2 3 Fan Units ...
Page 199: ...CG SVX17D EN 199 Unit Wiring 20 35 Ton Slant Frame Fan Control 2 3 Fan Units ...
Page 200: ...200 CG SVX17D EN Unit Wiring S2075 12 20 35 Ton Slant Frame Common Control ...
Page 201: ...CG SVX17D EN 201 Unit Wiring 20 35 Ton Slant Frame Common Control ...
Page 202: ...202 CG SVX17D EN Unit Wiring S2075 13 20 35 Ton Slant Frame Common Control ...
Page 203: ...CG SVX17D EN 203 Unit Wiring 20 35 Ton Slant Frame Common Control ...
Page 204: ...204 CG SVX17D EN Unit Wiring S2075 14 20 35 Ton Slant Frame Freeze Protection ...
Page 205: ...CG SVX17D EN 205 Unit Wiring 20 35 Ton Slant Frame Freeze Protection ...
Page 206: ...206 CG SVX17D EN Unit Wiring V2075 1 40 70 Ton V Frame Table of Contents ...
Page 207: ...CG SVX17D EN 207 Unit Wiring 40 70 Ton V Frame Table of Contents ...
Page 208: ...208 CG SVX17D EN Unit Wiring V2075 2 40 70 Ton V Frame Legend ...
Page 209: ...CG SVX17D EN 209 Unit Wiring 40 70 Ton V Frame Legend ...
Page 210: ...210 CG SVX17D EN Unit Wiring V2075 3 40 70 Ton V Frame Notes ...
Page 211: ...CG SVX17D EN 211 Unit Wiring 40 70 Ton V Frame Notes ...
Page 212: ...212 CG SVX17D EN Unit Wiring V2075 4 40 70 Ton V Frame Compressor Power Circuit 1 ...
Page 213: ...CG SVX17D EN 213 Unit Wiring 40 70 Ton V Frame Compressor Power Circuit 1 ...
Page 214: ...214 CG SVX17D EN Unit Wiring V2075 5 40 70 Ton V Frame Compressor Power Circuit 2 ...
Page 215: ...CG SVX17D EN 215 Unit Wiring 40 70 Ton V Frame Compressor Power Circuit 2 ...
Page 216: ...216 CG SVX17D EN Unit Wiring V2075 6 40 70 Ton V Frame Fan Power Circuit 1 ...
Page 217: ...CG SVX17D EN 217 Unit Wiring 40 70 Ton V Frame Fan Power Circuit 1 ...
Page 218: ...218 CG SVX17D EN Unit Wiring V2075 7 40 70 Ton V Frame Fan Power Circuit 2 ...
Page 219: ...CG SVX17D EN 219 Unit Wiring 40 70 Ton V Frame Fan Power Circuit 2 ...
Page 220: ...220 CG SVX17D EN Unit Wiring V2075 8 40 70 Ton V Frame Pump Power Control ...
Page 221: ...CG SVX17D EN 221 Unit Wiring 40 70 Ton V Frame Pump Power Control ...
Page 222: ...222 CG SVX17D EN Unit Wiring V2075 9 40 70 Ton V Frame Compressor Control ...
Page 223: ...CG SVX17D EN 223 Unit Wiring 40 70 Ton V Frame Compressor Control ...
Page 224: ...224 CG SVX17D EN Unit Wiring V2075 10 40 70 Ton V Frame Fan Control 2 3 Fan Units ...
Page 225: ...CG SVX17D EN 225 Unit Wiring 40 70 Ton V Frame Fan Control 2 3 Fan Units ...
Page 226: ...226 CG SVX17D EN Unit Wiring V2075 12 40 70 Ton V Frame Common Control ...
Page 227: ...CG SVX17D EN 227 Unit Wiring 40 70 Ton V Frame Common Control ...
Page 228: ...228 CG SVX17D EN Unit Wiring V2075 13 40 70 Ton V Frame Common Control ...
Page 229: ...CG SVX17D EN 229 Unit Wiring 40 70 Ton V Frame Common Control ...
Page 230: ...230 CG SVX17D EN Unit Wiring V2075 14 40 70 Ton V Frame Freeze Protection ...
Page 231: ...CG SVX17D EN 231 Unit Wiring 40 70 Ton V Frame Freeze Protection ...
Page 232: ...232 CG SVX17D EN Unit Wiring W2075 1 80 130 Ton W Frame Table of Contents ...
Page 233: ...CG SVX17D EN 233 Unit Wiring 80 130 Ton W Frame Table of Contents ...
Page 234: ...234 CG SVX17D EN Unit Wiring W2075 2 80 130 Ton W Frame Legend ...
Page 235: ...CG SVX17D EN 235 Unit Wiring 80 130 Ton W Frame Legend ...
Page 236: ...236 CG SVX17D EN Unit Wiring W2075 3 80 130 Ton W Frame Notes ...
Page 237: ...CG SVX17D EN 237 Unit Wiring 80 130 Ton W Frame Notes ...
Page 238: ...238 CG SVX17D EN Unit Wiring W2075 4 80 130 Ton W Frame Compressor Power Circuit 1 ...
Page 239: ...CG SVX17D EN 239 Unit Wiring 80 130 Ton W Frame Compressor Power Circuit 1 ...
Page 240: ...240 CG SVX17D EN Unit Wiring W2075 5 80 130 Ton W Frame Compressor Power Circuit 2 ...
Page 241: ...CG SVX17D EN 241 Unit Wiring 80 130 Ton W Frame Compressor Power Circuit 2 ...
Page 242: ...242 CG SVX17D EN Unit Wiring W2075 6 80 130 Ton W Frame Fan Power Circuit 1 ...
Page 243: ...CG SVX17D EN 243 Unit Wiring 80 130 Ton W Frame Fan Power Circuit 1 ...
Page 244: ...244 CG SVX17D EN Unit Wiring W2075 7 80 130 Ton W Frame Fan Power Circuit 2 ...
Page 245: ...CG SVX17D EN 245 Unit Wiring 80 130 Ton W Frame Fan Power Circuit 2 ...
Page 246: ...246 CG SVX17D EN Unit Wiring W2075 8 80 130 Ton W Frame Pump Power Control ...
Page 247: ...CG SVX17D EN 247 Unit Wiring 80 130 Ton W Frame Pump Power Control ...
Page 248: ...248 CG SVX17D EN Unit Wiring W2075 9 80 130 Ton W Frame Compressor Control ...
Page 249: ...CG SVX17D EN 249 Unit Wiring 80 130 Ton W Frame Compressor Control ...
Page 250: ...250 CG SVX17D EN Unit Wiring W2075 10 80 130 Ton W Frame Fan Control 2 3 Fan Units ...
Page 251: ...CG SVX17D EN 251 Unit Wiring 80 130 Ton W Frame Fan Control 2 3 Fan Units ...
Page 252: ...252 CG SVX17D EN Unit Wiring W2075 11 80 130 Ton W Frame Fan Control 4 5 Fan Units ...
Page 253: ...CG SVX17D EN 253 Unit Wiring 80 130 Ton W Frame Fan Control 4 5 Fan Units ...
Page 254: ...254 CG SVX17D EN Unit Wiring W2075 12 80 130 Ton W Frame Common Control ...
Page 255: ...CG SVX17D EN 255 Unit Wiring 80 130 Ton W Frame Common Control ...
Page 256: ...256 CG SVX17D EN Unit Wiring W2075 13 80 130 Ton W Frame Common Control ...
Page 257: ...CG SVX17D EN 257 Unit Wiring 80 130 Ton W Frame Freeze Protection ...
Page 258: ...258 CG SVX17D EN Unit Wiring W2075 14 80 130 Ton W Frame Freeze Protection ...
Page 259: ...CG SVX17D EN 259 Unit Wiring 80 130 Ton W Frame Common Control ...
Page 260: ...260 CG SVX17D EN Unit Wiring 2076 1 Field Wiring Diagram ...
Page 261: ...CG SVX17D EN 261 Unit Wiring C TRANE Field Wiring Diagram ...
Page 262: ...262 CG SVX17D EN Unit Wiring 2076 2 FUSE Field Wiring Diagram Notes ...