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INITIAL START UP

Pre Start Inspection

1. Remove the two front panels.
2. Check that all shipping blocks have been
removed.
3. Remove any and all packing tape (check inside
the storage bin).

4. Inspect the interior of the machine for loose
screws or wires. Check that no refrigerant lines are
rubbing each other. Check that the fan blade on air
cooled models turns freely.
5. Check that the machine is installed correctly
according to the final check list.

Start Up

1. Go through the pre start inspection.

2. Open the water hand valve, observe that water
enters the water reservoir, fills the tube from the
reservoir to the evaporator and then shuts off.
Check for leaks.

3. Switch the master switch on. The electrical start
up sequence is now on automatic:
A. There will be a short (15 second) delay before
the gearmotor starts.
B. After the gearmotor starts, the compressor will
start.

4. On air cooled models, warm air will begin to flow
from the condenser. Water cooled models will
begin to discharge warm water down the drain.

5. The unit should soon be making ice. If desired,
the low side pressure may be checked: it should
be 30 PSIG + or - 4 PSIG. 
The air cooled discharge pressure will depend
upon air and water temperatures, but should be
between 200 PSIG and 280 PSIG.
Water cooled discharge pressure should be about
220 PSIG. If needed, adjust the water regulating
valve.
The above numbers are for new, clean machines.
Field values may be somewhat higher or lower.

6. There are no adjustments to make, so replace
the panels.

7. Check ice dispensing by pushing in on the glass
filler lever. Ice dispenses are portion controlled; by
turning a knob, the length of time the unit
dispenses when the glass filler lever is pushed
(and the amount of ice dispensed) is adjusted.

8. Switch off the icemaker-dispenser, remove the
top panel and the top of the ice storage bin.
Sanitize the interior of the ice storage bin by wiping
it with a mixture of 1 ounce of household bleach to
1 gallon of water, allow to air dry. Replace all
covers and panels. Switch the icemaker-dispenser
back on.

9. Give the owner/user the service manual, instruct
him/her in the operation and maintenance
requirements of the unit. Make sure they know
who to call for service.

10. Fill out the warranty registration card, and mail
it in to Scotsman.

11. Fill out the field Quality Audit form, and mail it
to Scotsman.

ND650

 

March, 1989

Page 10

Summary of Contents for ND650

Page 1: ...nents and R502 refrigerant The ice dispensing section is a seamless plastic storage bin with a stainless steel ice agitator at the bottom to sweep the ice into the dispensing chute TABLE OF CONTENTS F...

Page 2: ...ize and type per National Electric Code ND650AE 1A ND650WE 1A ND650AS 1A ND650WS 1A 48 88 x 26 x 21 5 same same same NUGGET same same same Air Water Air Water 115 60 1 115 60 1 115 60 1 115 60 1 17 2...

Page 3: ...nufacturing plant it takes a raw material water and turns it into a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life This section is not...

Page 4: ...o match the outside edge of the cabinet base and sink The icemaker dispenser is heavy use of a mechanical hoist is recommended to lift it to the height required to install it The DMS machine stand has...

Page 5: ...the base or at either side through the pre punched holes using standard plumbing practices Interior plumbing lines must be disconnected from the original connections and plugged when routing through...

Page 6: ...nd recommended to insure that high quality drinks are dispensed 7 Install transformer in upper compartment of icemaker dispenser using screws provided It may be necessary to pre drill holes 8 Route dr...

Page 7: ...d to a 3 8 FPT condenser inlet at the back of the cabinet The water pressure to all lines must always be above 20 psig and below 120 psig Drains Air Cooled Models There is one 3 4 FPT drain at the bac...

Page 8: ...The machine requires a solid chassis to earth ground wire The ice maker should be connected to its own electrical circuit so it would be individually fused Voltage variation must remain within design...

Page 9: ...lumbing connections been made and checked for leaks 4 Has the machine been leveled 5 Is there a minimum of 6 inches of clearance at the left and right sides of an air cooled machine 6 Is there a minim...

Page 10: ...e checked it should be 30 PSIG or 4 PSIG The air cooled discharge pressure will depend upon air and water temperatures but should be between 200 PSIG and 280 PSIG Water cooled discharge pressure shoul...

Page 11: ...as the level of ice in the bin changes Drain Tube When uncapped and lowered drains the evaporator Condenser Air or water cooled where the heat removed in ice making is discharged Ice Storage Bin Asse...

Page 12: ...where the two seal faces meet Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Where the ice is compressed and much of the extra water is squ...

Page 13: ...ard On Off Switch Manual control for the machine Transformer Supplies low voltage to the circuit board Potential Relay The compressor start relay Reset Switch Part of Circuit Board manual reset Lights...

Page 14: ...the machine off if there is not enough water in the machine When the water level in the reservoir falls below the water level sensor the machine will shut down When the water refills the reservoir the...

Page 15: ...all routed to the drain Water cooled models have a separate water circuit for the cooling water it enters the fitting at the rear goes to the water regulating valve then to the water cooled condenser...

Page 16: ...rant depending upon the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less At the evaporator the refrigerant enters an area of relatively low pressur...

Page 17: ...motor for a certain length of time depending upon the setting of the portion control knob The dispensing takes place when the agitator sweeps the ice over the ice dispensing chute ice will continue t...

Page 18: ...ic and Hydroxyacetic acids These compounds are corrosive and may cause burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external cont...

Page 19: ...sensors from the grommets in the ice chute and wipe them clean 3 The bearing in the breaker should also be checked at least two times per year A Check the bearing by removing the ice chute cover unsc...

Page 20: ...cialist regarding water treatment For more information on removal of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove the front and top panels 2 Remove 3 hex studs holding ice chut...

Page 21: ...e and weigh in the nameplate charge E Check the high pressure cut out if closed go to F if open 1 The pressure control opens at 450 psig Check the high side pressure reset the control and observe on w...

Page 22: ...in full light on the tester should be ON if not replace the circuit board If the bin full light on the tester is ON move the tester switch to bin empty the light on the tester should go OFF and the bi...

Page 23: ...ontactor coil If the coil is open replace the contactor 3 Check the auger drive motor centrifugal switch If when the drive motor is running contact 4 black wire removed has no power and all of the abo...

Page 24: ...ater leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 30 psig If low assume a refrigerant leak locate repair and recharge If no leak the TXV may be res...

Page 25: ...se check for voltage at the agitator drive motor if none replace the portion control module in the control box If there is voltage and the agitator motor output shaft does not turn replace the agitato...

Page 26: ...mounting screws from reservoir bracket and remove reservoir from icemaker 8 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box...

Page 27: ...p screws holding breaker to evaporator d Lift up and remove breaker bearing assembly from auger evaporator 6 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the...

Page 28: ...nd unscrew stainless breaker cover from breaker left hand threads b Unscrew auger stud from top of auger c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up remove breaker from e...

Page 29: ...ove for the snap ring 2 Replace the snap ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger...

Page 30: ...earmotor has been inspected fasten the evaporator to the gear motor be sure that the number of shims indicated on the gear case cover is in place between the gearcase cover and the drip pan gasket Tor...

Page 31: ...ars the oil having a creamy white appearance oil level too high carefully inspect the bearings and gears If in doubt about the condition of a part replace it The oil quantity is 14 fluid ounces do not...

Page 32: ...ED GREASE SEAL GEARCASE COVER FIRST GEAR AND BEARINGS SECOND GEAR AND BEARINGS GASKET GEARCASE ROTOR SHAFT SEAL ROTOR BEARING DRIVE MOTOR CENTRIFUGAL SWITCH WARNING Disconnect electrical power before...

Page 33: ...All testing is done with the electrical power on the master switch on and all reset switches reset 1 Unplug photo trans and LED connectors from the circuit board 2 Plug photo trans and LED connectors...

Page 34: ...Water position The No Water light on the circuit board should go ON If not replace the circuit board b Move the water switch on the tester to the Water position The No Water light on the board should...

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