Manitowoc SR1801W Especificaciones descargar pdf (Pagina 191)

Part Number 80-1479-3 7/10 191

Charts

Cycle Times/24-Hour Ice Production/

Refrigerant Pressure Charts

These charts are used as guidelines to verify correct

ice machine operation.

Accurate collection of data is essential to obtain the

correct diagnosis.

• Refer to “Symptom #2 - Operational Analysis

Table” page 92 for the list of data that must be

collected for refrigeration diagnostics. This list

includes: before beginning service, ice production

check, installation/visual inspection, water system

checklist, ice formation pattern, safety limits,

comparing evaporator inlet/outlet temperatures,

discharge and suction pressure analysis.

• Ice production checks that are within 10% of the

chart are considered normal. This is due to

variances in water and air temperature. Actual

temperatures will seldom match the chart exactly.

• Zero out manifold gauge set before obtaining

pressure readings to avoid misdiagnosis.

• Discharge and suction pressure are highest at the

beginning of the cycle. Suction pressure will drop

throughout the cycle. Verify the pressures are

within the range indicated.

• Record beginning of freeze cycle suction pressure

one minute after water pump energizes.

• Regular cube production derate is 7%.

• 50Hz production derate is 7%.

• 50Hz regular cube total production derate is 14%.

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Manitowoc SR1801W Especificaciones Pagina 191