Scotsman MAR 106, Service Manual

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SEZIONE II
OPERATING INSTRUCTION
1. COMPLETE UNIT START-UP
1. Remove all panels and open the water supply
line shut-off valve for both the evaporator
drum and in the case of a water cooled
machine, to the condenser.
2. Observe the water filling operations.
a) Water flows into the float reservoir first.
b) Water is filling the freezing drum basin.
c) Float moves up as water level rises in water
reservoir.
d) Float stops water flow when water reaches
suitable operation level.
Now, water surrounds bottom half of freezing
drum.
3. Move the manual ON-OFF toggle of main
disconnect switch to ON position. The green
light on console panel will glow.
4. MAR uses an electrical "three phases
monitoring relay" which alerts installer in case
of wrong wiring by keeping green LED ON
only. In this case change phase connection
wiring.
5. Correct wiring is shown by both LEDs Green
and Orange steady ON together.
6. Observe immediately that evaporator drum
rotates in the right direction, namely toward
the scraping blade.
7. Meanwhile unit is under power KT1 relay
compressor device is energized as well in
order to delay compressor start up by 18' Later
(KT1 orange LED blinks during this delay). On
normal operation - compressor ON - KT1 LEDs
(orange and green) are steady ON together.
NOTE. In case on any temporally Ice maker
trip OFF (not alarm) due to NO/LOW water
pressure, bin full, ice spout switch activation
unit stops by only keeping drive motor operating
for 18' in order to clear evaporator by ice.
KT2 delay relay LEDs steady ON (orange
and green) during this delay.
WARNING - Correct Drum rotation - The
evaporator drum drive motor is a
threephase motor wired for 400 V. It is of
extreme importance to check immediately
upon unit start-up that motor rotates
CLOCKWISE in order that gear motor
pulley rotates in the direction of the
ARROW. Should the motor turn
counterclockwise, it is necessary to
instantly switch-off the unit and
interchange one polarity at terminal block
connection of main electric cord.