122
SEVERE SYSTEM CONTAMNATON CLEANUP
PROCEDURE
1. Remove the refrigerant charge.
2. Remove the compressor.
3. Disassemble the harvest solenoid valve. If burnout
deposits are found inside the valve, install a rebuild
kit, and replace the TXV and head pressure control
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 new start components.
7. Install suction line filter-drier in front of compressor.
8. Install a new liquid line drier.
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 500 microns. Run the vacuum
pump for 1 additional hour.
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. Replace
the suction line and liquid line drier if necessary.
13. Follow normal evacuation procedures.
Содержание STH042 4/16
Страница 2: ......
Страница 14: ...14 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 42: ...42 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 56: ...56 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 98: ...98 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 124: ...124 Part Number STH042 4 16 FIG A PINCHING OFF TUBING FIG B RE ROUNDING TUBING SV1406 Using Pinch Off Tool ...
Страница 126: ...126 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 136: ...136 Part Number STH042 4 16 U140 U190 U240 WIRING DIAGRAM WITHOUT J4 THERMISTOR TERMINAL ...
Страница 137: ...Part Number STH042 4 16 137 U310 WIRING DIAGRAM WITHOUT J4 THERMISTOR TERMINAL ...
Страница 138: ...138 Part Number STH042 4 16 U140 U190 U240 WIRING DIAGRAM WITH J4 THERMISTOR TERMINAL ...
Страница 139: ...Part Number STH042 4 16 139 U310 WIRING DIAGRAM WITH J4 THERMISTOR TERMINAL ...
Страница 144: ...144 Part Number STH042 4 16 THIS PAGE INTENTIONALLY LEFT BLANK ...
Страница 145: ......