Removal And Replacement: Refrigeration System - Scotsman AFE424A-1 Service Manual

AFE424

Removal and Replacement: Refrigeration System

I f the refrigeration system must be serviced, the
quality of service must insure that there will not be
a repeat failure, as repeat failures will cause
refrigerant to be discharged into the air by the
failure or when the failure is corrected.
The access valves are at the front of the cabinet,
behind the left grill.
Access valve caps MUST be on, or the VALVE
WILL LEAK.
·
If there has been a compressor burn out, check
for acid in the oil. If acid is indicated, extra steps
must be taken to clean up the system.
·
Never use refrigerant, such as R-11, to clean up
or flush out a refrigeration system. When
system clean-up is required, the use of suction
line filter-dryers and liquid line filter-dryers are
recommended.
·
Always replace the dryer when repairing a leak
or replacing a refrigeration component.
·
Evacuate the system with a good vacuum pump
to 300 microns or less. If the triple evacuation
method is used, the vacuum should be broken
each time with dry nitrogen, not refrigerant.
Evacuation must be from both sides of the
system.
·
Weigh in or measure in the nameplate charge.
Recharge into the high side.
·
Check for leaks with a high quality, electronic
leak detector. Halide torches will not locate the
very small leaks.
If an ice machine is to be discarded and still
contains refrigerant, Scotsman recommends that
the refrigerant be recovered, reclaimed, or
recycled so that it is not discharged into the air.
Control Box Service
The control box may be lifted up from its normal
position to improve service access.
To Move Control Box
1. Disconnect electrical power.
2. Go thru the steps to remove the hood, door and
bin.
3. Locate and remove the 3/8" hex head screw
holding the control box to the base, just below the
purge switch.
4. Pull the control box forward about an inch.
5. The control box may now be moved up the
height of the control box, be careful not to kink any
capillary tubes.
6. After service, replace the control box in its
normal position.
April 2010
Page 25
Electrical shock
hazard.
Electrical shock can
cause personal injury.
Disconnect power before
beginning to service
components.