172 Part Number: 000015431 Rev01 5/19
CLEANUP PROCEDURE
Mild System Contamination
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.
Important
Dry nitrogen is recommended for this procedure. This
will prevent refrigerant release.
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 (35 kPa,
.35 bar).
B. Pull vacuum to 500 microns. Break the vacuum
with dry nitrogen and sweep the system.
Pressurize to a minimum of 5 psig (35 kPa,
.35 bar).
C. Change the vacuum pump oil.
D. Pull vacuum to 500 microns. Run the vacuum
pump for 1 hour.
NOTE: You may perform a standing vacuum test to make 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.
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