Manitowoc Ice CM MODEL STH003 - Manual (Page 78)

78
SEVERE SYSTEM CONTAMINATION
CLEANUP PROCEDURE
1. Remove the refrigerant charge.
2. Remove the compressor.
3. Wipe away any burnout deposits from suction and
discharge lines at compressor.
4. Sweep through the open system with dry nitrogen.
IMPORTANT
Refrigerant sweeps are not recommended, as they
release CFC’s into the atmosphere.
5. Install a new compressor and new start
components.
6. Install suction line filter-drier in front of
compressor.
7. Install a new liquid line drier.
8. Follow the normal evacuation procedure, except
replace the evacuation step with the following:
IMPORTANT
Dry nitrogen is recommended for this procedure.
This will prevent CFC release.
e) Pull vacuum to 1000 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig.
f) Change the vacuum pump oil.
g) Pull vacuum to 500 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig.
h) Change the vacuum pump oil.
i)
Pull vacuum to 500 microns. Run the vacuum
pump for 1 hour additional hour.
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