Manitowoc CVD1375 Especificaciones descargar pdf (Pagina 194)

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9. Follow the normal evacuation procedure, except

replace the evacuation step with the following:

A. Pull vacuum to 1000 microns. Break the

vacuum with dry nitrogen and sweep the

system. Pressurize to a minimum of 5 psig.

B. Change the vacuum pump oil.

C. Pull vacuum to 500 microns. Break the vacuum

with dry nitrogen and sweep the system.

Pressurize to a minimum of 5 psig.

D. Change the vacuum pump oil.

E. Pull vacuum to 250 microns. Run the vacuum

pump for 1 hour additional.

10. Charge the system with the proper refrigerant to the

nameplate charge.

11. Operate the ice machine for one hour. Then, check

the pressure drop across the suction line filter-drier.

A. If the pressure drop is less than 2 psig, the

filter-drier should be adequate for complete

cleanup.

B. If the pressure drop exceeds 2 psig, change the

suction line filter-drier and the liquid line drier.

Repeat until the pressure drop is acceptable.

12. Operate the ice machine for 48-72 hours. Then

replace the suction line drier and change the liquid

line drier.

13. Follow normal evacuation procedures.

Important

Dry nitrogen is recommended for this procedure.

This will prevent CFC release.

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Manitowoc CVD1375 Especificaciones Pagina 194