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CU50
Service Manual
Refrigeration Service
This ice machine use R-134a type refrigerant.
There are specific rules for handling that
refrigerant.
To check for system pressures, add a field supplied
clamp-on type service valve as a temporary means
of system access. After diagnosis and before final
repair, replace the clamp-on type valve with valves
that are brazed onto the process tubes of the
system.
Use a low flow of dry nitrogen when brazing on the
system.
Install a new filter drier when replacing a
refrigeration component or after a refrigerant leak
repair.
Evacuate the system to at least 300 microns and
use a micron gauge to measure the evacuation
level.
Weigh in the nameplate charge. The machine is
critically charged and a partial ounce mis-charge
will affect performance.
Bin Thermostat Altitude Adjustment Screw
Altitude
1000
2000
3000
4000
5000
600
7000
February 2012
Page 30
Degrees Rotation to
Turn Adjustment Screw
11 cw
31 cw
52 cw
72 cw
92 cw
111 cw
128 cw
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