Manitowoc I0500 Especificaciones descargar pdf (Pagina 146)

146 Part Number STH025 02/12

Final Analysis - Self-contained Air, Water &

Remote Condenser Models

The column with the highest number of Checkmarks

identifies the refrigeration problem.

COLUMN 1 - HARVEST VALVE LEAKING

Replace the valve as required.

COLUMN 2 - LOW CHARGE/TXV STARVING

Normally, a starving expansion valve only affects the

freeze cycle pressures, not the harvest cycle

pressures. A low refrigerant charge normally affects

both pressures. Verify the ice machine is not low on

charge before replacing an expansion valve.

1. Add refrigerant charge to verify a low charge (air

and water self-contained only). Do not add more

than 30% of nameplate refrigerant charge. If the

problem is corrected, the ice machine is low on

charge.

*Do not add charge to remote models. The

symptoms of a remote low on charge will result in

a safety limit #1 in cool ambient temperatures.

Check the liquid line temperature at the ice

machine. The liquid line will be hot with a normal

or below normal head pressure in freeze when the

ice machine is low on refrigerant.

2. Find the refrigerant leak. The ice machine must

operate with the nameplate charge. If the leak

cannot be found, proper refrigerant procedures

must still be followed Change the liquid line drier.

Then, evacuate and weigh in the proper charge.

3. If the problem is not corrected by adding charge,

the expansion valve is faulty.

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Manitowoc I0500 Especificaciones Pagina 146