Manitowoc S300 Technician's Handbook

Also see for S300: Manual Use and care manual Installation, use & care manual Installation, use & care manual Installation, operation and maintenance manual

Contents

Manitowoc S300 Technician's Handbook Manual pdf 183 page image

Part Number 80-1479-3 7/10 183REPLACING 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 (air cooled only)• Water regulating valve (water cooled only)• High pressure cut-out control• High side service valve• Low side service valve1. Disconnect power to the ice machine.2. Follow all manufacturer’s 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.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 not re-round 100%.ImportantThis is a required in-warranty repair procedure.! WarningDo not unsolder a defective component. Cut it out ofthe system. Do not remove the pinch-off tool until thenew component is securely in place.