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192 Part Number 80-01111-9 7/10

MILD SYSTEM CONTAMINATION CLEANUP

PROCEDURE

1. Replace any failed components.

2. If the compressor is good, change the oil.

3. Replace the liquid line drier.

NOTE: If the contamination is from moisture, use heat

lamps during evacuation. Position them at the

compressor, condenser and evaporator prior to

evacuation. Do not position heat lamps too close to

plastic components, or they may melt or warp.

4. 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. Pull vacuum to 500 microns. Break the

vacuum with dry nitrogen and sweep the

system. Pressurize to a minimum of 5 psig.

C. Change the vacuum pump oil.

D. Pull vacuum to 500 microns. Run the vacuum

pump for 1/2 hour on self-contained models,

1 hour on remotes.

NOTE: You may perform a pressure test as a

preliminary leak check. You should use an electronic

leak detector after system charging to be sure there

are no leaks.

5. Charge the system with the proper refrigerant to

the nameplate charge.

6. Operate the ice machine.

Important

Dry nitrogen is re commended for this procedure.

This will prevent CFC release.

Manitowoc SMS050A Technician's Handbook

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