Manitowoc
Manitowoc Manitowoc
ImportantManifold gau ges must be re moved pro perly toensure th at n o refri gerant con tamination or lossoccurs. A quick disconnect is required for the highside connection u nless high sid e val ve ha s shutoff.RECOVERY/EVACUATION1. Place the toggle switch in the OFF position.2. Install manifold gauges, charging scale, andrecovery unit or two-stage vacuum pump.3. Open the high and low side valves on manifoldgauges.4. Perform recovery or evacuation:A. Recovery: Operate the recovery unit asdirected by the manufacturer’s instructions.B. Evacuation prior to recharging: Pull thesystem down to 500 microns. Then, allow thepump to run for an additional half hour. Turnoff the pump and perform a standing vacuumleak check.NOTE: Check for leaks using a halide or electronicleak detector after charging the ice machine.188 Part Number 80-01111-9 7/10
CHARGING PROCEDURESImportantThe cha rge i s criti cal o n a ll Man itowoc i cemachines. Use a scale to e nsure the prop ercharge is installed. A quick disconnect is requiredfor the high side connection.1. Be sure the toggle switch is in the OFF position.2. Close the vacuum pump valve and the low sidemanifold gauge valve.3. Open the high side manifold gauge valve.4. Open the refrigerant cylinder and add the properrefrigerant charge (shown on nameplate) throughthe discharge service valve.5. Close the high side on the manifold gauge set.Add any remaining vapor charge through thesuction access fitting (if necessary).6. Let the system “settle” for 2 to 3 minutes.7. Place the toggle switch in the ICE position.NOTE: Manifold gauges must be removed properly toensure that no refrigerant contamination or lossoccurs.8. Make sure that all of the vapor in the charginghoses is drawn into the ice machine beforedisconnecting the charging hoses.A. Run the ice machine in the freeze cycle.B. Verify the refrigerant cylinder valve is closed.C. Open the high and low side valves on themanifold gauge set. Any refrigerant in thelines will be pulled into the low side of thesystem.D. Allow the pressures to equalize while the icemachine is in the freeze cycle.E. Close the high and low side manifold gaugeset.F. Remove the hoses from the ice machine andinstall the caps.Part Number 80-01111-9 7/10 189
- Page 138 and 139: Ice Production CheckThe QM20/QM30 d
- Page 140 and 141: REFRIGERATION DIAGNOSTICSImportant:
- Page 142 and 143: 5. Install thermometer thermocouple
- 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 190 and 191: System Contamination CleanupGENERAL
- Page 192 and 193: MILD SYSTEM CONTAMINATION CLEANUPPR
- Page 194 and 195: REPLACING PRESSURE CONTROLS WITHOUT
- 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
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- 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
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ImportantManifold gau ges must be re moved pro perly toensure th at n o refri gerant con tamination or lossoccurs. A quick disconnect is required for the highside connection u nless high sid e val ve ha s shutoff.RECOVERY/EVACUATION1. Place the toggle switch in the OFF position.2. Install manifold gauges, charging scale, andrecovery unit or two-stage vacuum pump.3. Open the high and low side valves on manifoldgauges.4. Perform recovery or evacuation:A. Recovery: Operate the recovery unit asdirected by the manufacturer’s instructions.B. Evacuation prior to recharging: Pull thesystem down to 500 microns. Then, allow thepump to run for an additional half hour. Turnoff the pump and perform a standing vacuumleak check.NOTE: Check for leaks using a halide or electronicleak detector after charging the ice machine.188 Part Number 80-01111-9 7/10
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