Scotsman SCE170 Manual de Serviço Página 31
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Refrigeration Service
General Information:
Work on the refrigeration system should only be
done when it is certain that the system needs
repair.
•
Refrain from checking refrigeration
pressures without reason.
Visual inspection
of the water system, observation of the ice
formation, amp draw, voltage, and other
techniques will lead to proper diagnosis.
Scotsman also recommends that, at the time of
initial start up, gauges not be used.
•
If gauges must be used, don’t always check the
high side pressure. If the condenser is clean
and seems to be operating correctly, it most
likely is. The low side pressure is more
important on an ice machine than the high side.
•
If gauges must be used, use very short hoses
to minimize refrigerant discharged into the air.
•
Refrigerant should not be added except as a
way to determine the proper operation of the
product. If the system was low on refrigerant,
there is a leak, and it must be found and
repaired.
•
This system has a critical charge, it must be
recharged with the correct amount of refrigerant
as listed on the nameplate of the ice machine,
or performance will suffer.
•
Anytime the refrigeration system has been
opened, the dryer should be replaced.
Note:
Only a HFC type dryer should be used.
•
When brazing the tubing connections to
components such as the TXV, the component
must be protected by heat sink material.
Recover, reclaim or recycle refrigerant
. The
method chosen is up to the service company. Any
refrigerant placed into a Scotsman ice machine
must meet ARI spec 700-88. Reclaim programs
are available through most refrigerant wholesalers.
Access Valves:
To use the access valves:
Remove the cap from the stem, use a 3/16" allen
wrench to check that the valve is CLOSED. The
remove the core cap.
Close the valve and replace the caps when the
job is finished. The valve must be closed and
the caps must be on or the valve will leak.
Torque Stem Cap to
8-12 ft. lb.
Torque Stem to
6-8 ft. lb.
Torque
Core Cap to
7-12 ft. lb.
Access Valves
Note: There are no valve
cores in this valve.
Allen
Wrench
SCE170
October 1998
Page 31
- Introduction 1
- Specifications 2
- Installation 4
- Removal of the Cabinet 7
- Component Location 8
- Component Description 9
- Initial Start Up 10
- Electrical Sequence 12
- Maintenance and Cleaning 13
- Pouring In 14
- Cleaning Solution 14
- Sanitizing and Cleaning 15
- Water Schematic: 16
- Refrigeration Schematic: 17
- Technical Characteristics 18
- Service Diagnosis 19
- October 1998 22
- Service of Purge Valve 27
- Water Distributor 28
- Liquid Charging 30
- Refrigeration Service 31
- 17-2089-01 32
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