Service manual

HEC-Series Service Manual
TABLE OF CONTENTS
10/23/01
iv
Page No.
Lubrication .................................................................................................................................................. 7-6
Compressor........................................................................................................................................... 7-6
Cutter Gear Reducer............................................................................................................................. 7-6
Preventative Maintenance............................................................................................................................ 7-7
Daily Checklist..................................................................................................................................... 7-7
Note To Manager or Owner ................................................................................................................. 7-7
Preventive Maintenance Program......................................................................................................... 7-8
8. TROUBLESHOOTING (A Checklist)
Machine Won’t Run .................................................................................................................................... 8-1
Freeze-up Due To Extended Freezing Period.............................................................................................. 8-2
Freeze-up Due To Ice Failing To Discharge ............................................................................................... 8-3
Low Ice Capacity......................................................................................................................................... 8-4
Safety Pressure Switches Stop Machine...................................................................................................... 8-5
Motor Overload Protectors Stop Machine................................................................................................... 8-6
9. SERVICE OPERATIONS
Adjustable Blowdown (For Clearer Ice)...................................................................................................... 9-1
Automatic Blowdown (Harvest Cycle)........................................................................................................ 9-1
Float Valve (Make-Up Water)..................................................................................................................... 9-1
Expansion Valve.......................................................................................................................................... 9-1
Expansion Valve Adjustment Procedure & Installation .............................................................................. 9-2
Recommended Superheat Setting, TABLE 9-1 ........................................................................................... 9-2
Freezer Pressure Switches ........................................................................................................................... 9-3
Freezer Pressure Switch (Allen-Bradley), FIGURE 9-1.............................................................................. 9-3
Allen Bradley Switch................................................................................................................................... 9-4
High/Low Pressure Switch .......................................................................................................................... 9-4
High/Low Pressure Switch, FIGURE 9-2.................................................................................................... 9-5
Head Pressure.............................................................................................................................................. 9-5
Air-Cooled Units ......................................................................................................................................... 9-5
Water Regulating Valve, FIGURE 9-3........................................................................................................ 9-6
Condenser Fan Switch, FIGURE 9-4........................................................................................................... 9-6
Water Cooled Units ..................................................................................................................................... 9-6
Compressor Crankcase Heater..................................................................................................................... 9-6
Ice Bin Thermostat(s) Adjustments............................................................................................................. 9-6
Ice Bin Thermostat, FIGURE 9-5................................................................................................................ 9-7
Thawing Timer, FIGURE 9-6...................................................................................................................... 9-8
Thawing Timer............................................................................................................................................ 9-8
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