–23–
Step 5. Schrader valve core removal tools that allow
for removal and installation of the valve cores without
removing manifold gauge set hoses are recommended
to decrease the evacuation time.
Leave the line set shut-off valves closed (front seated).
Pressure test the line sets and CVD
®
Condensing Unit
with 150 psig of dry nitrogen. Add nitrogen at the line
set shut-off valves located at the back of the ice
machine. Complete the pressure test, verify no leaks
are present and remove the nitrogen from the system
before connecting the vacuum pump. Connect a
vacuum pump to both of the line set shut-off valves
located at the back of the ice machine head section.
Evacuate to 250 microns (or less). To completely
evacuate the CVD
®
Condensing Unit, continue the
evacuation for 30 minutes after reaching the
500-micron point.
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