Severe System Contamination Cleanup Procedure - Koolaire KDT0300A Technician's Handbook

SEVERE SYSTEM CONTAMINATION CLEANUP
PROCEDURE
1. Remove the refrigerant charge.
2. Remove the compressor.
3. Remove the compressor and inspect the refrigeration
lines. If burnout deposits are found, install a new
harvest valve, replace the manifold strainer, TXV and
harvest pressure regulating valve.
4. Wipe away any burnout deposits from suction and
discharge lines at compressor.
5. Sweep through the open system with dry nitrogen.
6. Install a new compressor and start components when
used.
7. Install suction line filter-drier in front of compressor.
8. Install an access valve at the inlet and outlet of the
suction line filter drier if valves are not present.
9. Install a new liquid line drier.
10. 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 500 microns. Run the vacuum
pump for 1 additional hour.
110 Part Number STH063 9/17