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Refrigeration System |
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| Section 7 | ||||||||
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REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES |
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| S Models Dual Expansion Valve - Ice Machine Model Number_________________ | ||||||
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| This table must be used with charts, checklists and other references to eliminate refrigeration | ||||||
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| components not listed on the table and external items and problems, which can cause good | ||||||
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| refrigeration components to appear defective. |
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| Operational Analysis | 1 | 2 | 3 | 4 |
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| Ice Production |
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| Water Temperature Entering Ice Machine_________ |
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| Published 24 hour ice production________________ |
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| Calculated (actual) ice production_______________ |
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| NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of charted | |||||
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| capacity. |
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| Installation and Water System | All installation and water related problems must be corrected before proceeding with chart. |
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| Ice Formation Pattern | Ice formation is extremely | Ice formation is extremely | Ice formation normal | Ice formation normal | |||||||
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| thin on outlet of evaporator | thin on outlet of one side of | ||||
| Left Side__________________ | evaporator | Ice formation is extremely | No ice formation on entire | ||||||||
| No ice formation on the one | thin at inlet of one side of | evaporator | |||||||||
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| side of evaporator | No ice formation on entire | evaporator |
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| Right Side_________________ |
| evaporator |
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| No ice formation on entire |
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| evaporator |
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| Safety Limits |
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| Refer to “Analyzing Safety Limits” to | Stops on safety limit: | Stops on safety limit: | Stops on safety limit: | Stops on safety limit: | |||||||
| eliminate all | 1 or 2 | 1 or 2 | 1 or 2 | 1 or 2 | |||||||
| problems. |
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| Freeze Cycle |
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| Discharge Pressure |
| If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminate | |||||||||
_____ | ______ | ______ | ||||||||||
problems and/or components not listed on this table before proceeding. | ||||||||||||
| 1 minute | Middle | End | |||||||||
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| into cycle |
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| Freeze Cycle |
| If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate | |||||||||
| Suction Pressure |
| problems and/or components not listed on this table before proceeding. | |||||||||
_____ | ______ | ______ | Suction pressure is | Suction pressure is | Suction pressure is | Suction pressure is | ||||||
High | Low or Normal | High | High | |||||||||
| 1 minute | Middle | End | |||||||||
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| Wait 5 minutes into the freeze cycle. | One harvest valve inlet is | Both harvest valve inlets are | Both harvest valve inlets are | Both harvest valve inlets | |||||||
| Compare temperatures of | Hot | Cool enough to hold hand | Cool enough to hold hand | are Cool enough to hold | |||||||
| on | on | hand on | |||||||||
| compressor discharge line | |||||||||||
| approaches the temperature | |||||||||||
| and both harvest valve inlets. | of a Hot compressor | the compressor discharge | the compressor discharge | the compressor discharge | |||||||
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| discharge line. | line is Hot. | line is Cool | line is Hot. | ||
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| enough to hold hand on. |
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| Discharge Line Temperature | Discharge line temperature | Discharge line temperature | Discharge line temperature | Discharge line | |||||||
| Record freeze cycle discharge line | |||||||||||
| 160°F (71.1°C) | 160°F (71.1°C) | less than | temperature 160°F | ||||||||
| temperature at the end of the freeze | |||||||||||
| or higher at the end of the | or higher at the end of the | 160°F (71.1°C) at the end | (71.1°C) or higher at the | ||||||||
| cycle |
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| freeze cycle | freeze cycle | of the freeze cycle | end of the freeze cycle | |||
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| Final Analysis |
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| Low On Charge |
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| Enter total number of boxes checked | Harvest Valve Leaking | TXV Flooding | Compressor | ||||||||
| in each column. |
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| TXV Starving |
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Part Number |