Maintenance & Cleaning Instructions - Scotsman MAR 78 Service Manual

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1. GENERAL
The periods and procedure for maintenance and
cleaning are given as guides and are not to be
construed as absolute or invariable.
Cleaning especially will vary depending upon
local water conditions and the ice volume
produced and each ice maker must be maintained
individually in accordance with is own particolar
location requirements.
2. ICEMAKER/CONDENSING UNIT
THE FOLLOWING MAINTENANCE MUST BE
SCHEDULED AT LEAST TWO TIMES PER
YEAR ON THIS ICE MAKER. CALL YOUR AU-
THORIZED SCOTSMAN SERVICE AGENCY.
1. Check and clean water line Strainer.
2. Remove top panel and depress the float to
ensure that a full stream of water enters both
Float & Drum Reservoirs.
3. Check that the ice maker cabinet is level in
side-to-side and front-to-rear directions.
4. Check that the water level in the Drum basin
is high enough to surround the wanted portion
of revolving drum.
5. Clean the water reservoir and exterior of the
drum assembly using a solution of
SCOTSMAN Ice Machine Cleaner. Refer to
procedure VI-3, CLEANING ICE MAKER.
NOTE. Cleaning requirements vary
according local water conditions and
individual user operation.
6. When doubtful about refrigeration charge,
check gauge for compressor head pressure
according to model technical specification.
7. Check gauge for Suction Line Pressure
which varies depending upon models, inlet
water temperature and ambient tempera-
ture.
8. Check drive motor operation.
Normal operating temperatures are about
60°C (160°C) which is hot to touch. Check
with amperometer Amps drawn.
9. Check V belt for concealed signs of wear and
that has the correct tension. Check pulleys
alignements and also that drive motor and
gear box hold down bolts are tight enough.
10. Make sure that water lines in water cooled
condenser are free from any excess of water
minerals: otherwise arrange to clean the
tubes with a power driven wire brush or
running through it a weak acid solution made
with 20 percent of hydrocloric acid.
SECTION VI
MAINTENANCE & CLEANING INSTRUCTIONS
11. Check for refrigerant leaks and for proper
frost line, which should frost out of
accumulator at least half way to the
compressor and in some areas, back to
service valve. Check for dryness of system
through moisture indicator if any.
12. Check for water leaks. Tighten drain line
connections. Pour water down drain to be
sure that drain line is open and clear.
13. Check the quality of ice. Ice flakers should be
dry and have a thickness gauge of about
2 m/m.
14. Check compressor oil level through sight
glass. Stop unit operation and after two/three
minutes see that oil level is 2/3 millimeters
above center line of sight glass.
15. Be sure of proper position and condition of
plexiglass chute on spout opening.
3A. CLEANING INSTRUCTION
(MAR 78-108-128)
1. Disconnect power front the unit.
2. Remove screws and top panel
3. Remove evaporator cover panel
4. Close water inlet valve located at evaporator
side onto water inlet line.
5. Press water hose clamp in order to release it
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