Scotsman MF 88, Руководство по обслуживанию

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Page 8
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SECTION II
OPERATING INSTRUCTIONS
PRE-START INSPECTION
Verify that drive motor current limiter GAVAZZI
DIB71 (KA1), located in control box on side of
contactor (KM2), has the following setting.
MF 88 - MFN 88
400V 230V
HYS 6 6
LEVEL 80% - 1,6 Amps 50% - 2,5 Amps
DELAY 2 sec. 2 sec.
Dip switch (under cover):
400 V all in ON position
230 V dip Sw 1 in OFF position, 2
→
6 in ON
position.
START-UP
The following procedure can only be started after
pre-start inspection has been properly completed.
1. Open the water supply line shutoff valve.
Observe that water enters the water reservoir,
fills the tube from the reservoir to the evaporator
and then shut-off. Check for leaks.
NOTE. The MF/MFN 88 is equipped with a 3
Phase Monitoring Relay (F1). In case the
three phase are connected in wrong way, the
machine doesn't start with the simultaneous
glowing of the 3 Phase Sequence Protector
Warning light. Just reverse two of the three
phases on the main plug so to have the
correct sequence and by so, the start up of
the machine.
2. After having properly connected the unit to
any rack system or dedicated condensing unit,
turn ON the ice maker Master Switch, 18 minutes
later, after the start up of the drive motor (yellow
led of the Time Delay Relay KT1 blinking), the
liquid valve opens.
3. After two or three minutes of unit operation
observe that flaked ice begins to drop out in the
ice spout.
4. Let the system operate for about 30 minutes.
Check for any excess noises beyond normal
noise:
a) Vibrating type from touching lines.
b) Chattering: lack of water in Freezer.
5. If desired, the low side pressure can be
checked, it should be 1.7 atm (25 PSI).
Check to see through liquid sight glass for correct
refrigerant flow and charge.
6. Evaporator pressure type KVP value opens
at a rise in pressure on the inlet side, i.e. when the
pressure in evaporator exceeds the set value.
7. Hold a handful of ice around the ice storage
bin thermostatic control bulb to test shut-off. Less
than one minute is about normal for bulb shut-off
function to cause the ice maker to stop (Drive
motor after 18 minutes delay - yellow led of KT2
blinking).
Remember that unit will resume operation after
18 minutes that bin thermostat has closed its
contacts.
8. There are no adjustments to make, so
replace the panels.
9. Throughly explain the owner/user the
significant specifications of the ice maker, the
start-up, operation and attention to pay going
through the procedures in the operating
instructions. Answer all questions about the ice
maker, by the owner, and inform the owner of the
name and telephone number of the authorized
SCOTSMAN Service Agency serving him.