Manitowoc
Manitowoc Manitowoc
REPLACING PRESSURE CONTROLS WITHOUTREMOVING REFRIGERANT CHARGEThis procedure reduces repair time and cost. Use itwhen any of the following components requirereplacement, and the refrigeration system isoperational and leak-free.• Fan cycle control• High pressure cut-out control• High side access valve• Low side access valveImportantThis is a required in-warranty repair procedure.1. Disconnect power to the ice machine.2. Follow all manufacturers’ instructions suppliedwith the pinch-off tool. Position the pinch-off toolaround the tubing as far from the pressure controlas feasible. (See the figure on next page.) Clampdown on the tubing until the pinch-off is complete.! WarningDo not unsolder a defective component. Cut it outof the system. Do not remove th e p inch-off too luntil the new component is securely in place.3. Cut the tubing of the defective component with asmall tubing cutter.4. Solder the replacement component in place.Allow the solder joint to cool.5. Remove the pinch-off tool.6. Re-round the tubing. Position the flattened tubingin the proper hole in the pinch off tool. Tighten thewing nuts until the block is tight and the tubing isrounded.NOTE: The pressure controls will operate normallyonce the tubing is re-rounded. Tubing may notre-round 100%.194 Part Number 80-01111-9 7/10
FIG. A - “PINCHING OFF” TUBINGFIG. B - RE-ROUNDING TUBINGUsing Pinch Off ToolSV1406Part Number 80-01111-9 7/10 195
- Page 144 and 145: SM50DIAGNOSING AN ICE MACHINETHAT W
- Page 146 and 147: ICE QUALITY IS POOR — CUBES ARE S
- Page 148 and 149: ICE MACHINE RUNS AND NO ICE IS PROD
- Page 150 and 151: DISCHARGE PRESSURE HIGH CHECKLISTIm
- Page 152 and 153: ProcedureStep1. Determine the ice m
- Page 154 and 155: Other• Non-Manitowoc components i
- Page 156 and 157: FindingsThe inlet of the harvestval
- Page 158 and 159: ADJUSTING CUBE WEIGHTThe cube weigh
- Page 160 and 161: Bin SwitchQM45/Q130/Q170/Q210/Q270F
- Page 162 and 163: Bin Switch Removal — QM45/Q1301.
- Page 164 and 165: Bin ThermostatQM20/QM30FunctionThe
- Page 166 and 167: SM50FunctionThe bin thermostat stop
- Page 168 and 169: Check Procedure! WarningHigh (line)
- Page 170 and 171: Temperature/Resistance ChartAs the
- Page 172 and 173: ON/OFF/WASH Toggle SwitchFUNCTIONTh
- Page 174 and 175: Ice Thickness ProbeQM45/Q130/Q170/Q
- Page 176 and 177: Compressor Electrical DiagnosticsTh
- Page 178 and 179: Fan Cycle ControlQM45/Q130/Q170/Q21
- Page 180 and 181: Filter-DriersLIQUID LINE FILTER DRI
- Page 182 and 183: REFRIGERANT RE-USE POLICYManitowoc
- Page 184 and 185: RECOVERY AND RECHARGING PROCEDURESQ
- Page 186 and 187: NOTE: Manifold gauges must be remov
- Page 188 and 189: ImportantManifold gau ges must be r
- Page 190 and 191: System Contamination CleanupGENERAL
- Page 192 and 193: MILD SYSTEM CONTAMINATION CLEANUPPR
- Page 196 and 197: Q270 Condenser Fan Motor Replacemen
- Page 198 and 199: MAX. 1300°F(700°C)SV30714. Apply
- Page 200 and 201: High Pressure Cutout (HPCO) Control
- Page 202 and 203: This Page Intentionally Left Blank2
- Page 204 and 205: QM20 SELF-CONTAINED AIR-COOLEDNOTE:
- Page 206 and 207: QM45 SELF-CONTAINED AIR-COOLEDNOTE:
- Page 208 and 209: SM50 SELF-CONTAINED AIR-COOLEDNOTE:
- Page 210 and 211: Q130 SELF-CONTAINED AIR-COOLED(Afte
- Page 212 and 213: Q170 SELF-CONTAINED AIR-COOLEDNOTE:
- Page 214 and 215: Q210 SELF-CONTAINED WATER-COOLEDNOT
- Page 216 and 217: Q270 SELF-CONTAINED WATER-COOLEDNOT
- Page 218 and 219: QM20CAUTION: DISCONNECT POWER BEFOR
- Page 220 and 221: QM30230V/1 Ph/50 HzL1CAUTION: DISCO
- Page 222 and 223: SM50L1CAUTION: DISCONNECT POWER BEF
- Page 224 and 225: Q130/Q170/Q210Danfoss CompressorL1N
- Page 226 and 227: Q270Danfoss CompressorL1NOTE: DIAGR
- Page 228 and 229: QM45/Q130/Q170/Q210/Q270ICE THICKNE
- Page 230 and 231: Tubing SchematicsQM20/QM30 Tubing S
- Page 232 and 233: SM50 Tubing SchematicHEATEXCHANGERE
- Page 234: This Page Intentionally Left Blank2
REPLACING PRESSURE CONTROLS WITHOUTREMOVING REFRIGERANT CHARGEThis procedure reduces repair time and cost. Use itwhen any of the following components requirereplacement, and the refrigeration system isoperational and leak-free.• Fan cycle control• High pressure cut-out control• High side access valve• Low side access valveImportantThis is a required in-warranty repair procedure.1. Disconnect power to the ice machine.2. Follow all manufacturers’ instructions suppliedwith the pinch-off tool. Position the pinch-off toolaround the tubing as far from the pressure controlas feasible. (See the figure on next page.) Clampdown on the tubing until the pinch-off is complete.! WarningDo not unsolder a defective component. Cut it outof the system. Do not remove th e p inch-off too luntil the new component is securely in place.3. Cut the tubing of the defective component with asmall tubing cutter.4. Solder the replacement component in place.Allow the solder joint to cool.5. Remove the pinch-off tool.6. Re-round the tubing. Position the flattened tubingin the proper hole in the pinch off tool. Tighten thewing nuts until the block is tight and the tubing isrounded.NOTE: The pressure controls will operate normallyonce the tubing is re-rounded. Tubing may notre-round 100%.194 Part Number 80-01111-9 7/10