background image

MAINTENANCE AND CLEANING

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

A Scotsman Ice System represents a sizable investment of time and money in any company’s
business.  In order to receive the best return for that investment, it MUST receive periodic
maintenance.

It is the USER’S RESPONSIBILITY to see that the unit is properly maintained.  It is always
preferable, and less costly in the long run, to avoid possible down time by keeping it clean;
adjusting it as needed; and by replacing worn parts before they can cause failure.  The following
is a list of recommended maintenance that will help keep the machine running with a minimum of
problems.

Maintenance and Cleaning should be scheduled at a minimum of twice per year.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

/////////////////////////////WARNING////////////////////////////

Electrical power will be ON when doing in
place cleaning.
 Switch it OFF before
completing the cleaning procedures.
///////////////////////////////////////////////////////////////////////////
ICEMAKING SYSTEM: In place cleaning
1.  Check and clean any water treatment devices,
if any are installed.
2. Remove screws and the front panel.
3.  Move the ON-OFF switch to OFF.
4.  Remove all the ice from the storage bin.
5.  Remove the cover to the water reservoir and
block the float up.
6.  Drain the water reservoir and freezer assembly
using the drain tube attached to the freezer water
inlet.  Return the drain tube to its normal upright
position and replace the end cap.

///////////////////////////WARNING//////////////////////////////

Scotsman Ice Machine Cleaner contains
Phosphoric 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
contact, flush with water.  KEEP OUT OF THE
REACH OF CHILDREN.
//////////////////////////////////////////////////////////////////////////
7.  Prepare the cleaning solution:  Mix eight
ounces of Scotsman Ice Machine Cleaner with
three quarts of hot water. The water should be
between 90-115 degrees F.

8.  Slowly pour the cleaning solution into the water
reservoir until it is full.  Wait 15 minutes, then
switch the master switch to ON.
9.  As the ice maker begins to use water from the
reservoir, continue to add more cleaning solution
to maintain a full reservoir.
10. After all of the cleaning solution has been
added to the reservoir, and the reservoir is nearly
empty, switch the master switch to OFF.
11. After draining the reservoir, as in step 6, wash
and rinse the water reservoir.
12. Remove the block from the float in the water
reservoir.
13. Switch the master switch to ON
14. Continue ice making for at least 15 minutes, to
flush out any cleaning solution.  Check ice for acid
taste - continue icemaking until ice tastes sweet.

//////////////////////////////WARNING///////////////////////////

DO NOT USE any ice produced from the
cleaning solution.
Be sure no ice remains in the bin.
///////////////////////////////////////////////////////////////////////////
15. Remove all ice from the storage bin.
16. Add warm water to the ice storage bin and
thoroughly wash and rinse all surfaces within the
bin.
17. Sanitize the bin interior with an approved
sanitizer using the directions for that sanitizer.

18. Replace the front panel.

The NM1852 is made up of two separate ice makers; to properly clean and maintain the NM1852, these
steps must be followed for both systems. 

NM1852

August  1993

Page 16

Summary of Contents for NM1852

Page 1: ...ctronic circuit for monitoring ice and water level a thermostatic expansion valve and R 22 as the refrigerant TABLE OF CONTENTS Installation For the Installer Specifications 2 Storage Bin 4 Location 5...

Page 2: ...me Basic Electrical 208 230 60 1 same 208 230 60 3 same Ice Type NUGGET same same same Condenser Type Air Water Air Water The normal finish for the ice machine is enamel sandalwood A stainless steel p...

Page 3: ...water test and recommendations regarding filters and treatment 2 In most cases the water used to make ice should be filtered or treated depending upon the water There is no one type of water filter th...

Page 4: ...urn the leg levelers all the way in preparation for leveling later Return the bin to the upright position remove paper covering the bin gasket Note Do not push bin into position but lift it there Push...

Page 5: ...FOR THE INSTALLER Location ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE S NM1852 August 1993 Page 5...

Page 6: ...r cooled condensers The water pressure to all lines must always be above 20 psig and below 80 psig Drains Air Cooled Models There is one 3 4 FPT drain for both ice making systems at the back of the ca...

Page 7: ...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 limi...

Page 8: ...ate requirements 3 Have all the plumbing connections been made and checked for leaks 4 Has the machine and bin been leveled 5 Is there a minimum of 6 clearance at the back of the machine for proper se...

Page 9: ...ed into the drain 5 The unit should soon be making ice if desired the low side pressure of each system can be checked it should be 25 psig or 2 PSIG The suction line temperature at the compressor is n...

Page 10: ...the reservoir to make ice out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it se...

Page 11: ...a built in time delay to clear the evaporator of ice when the unit turns off and for the compressor Transformer Supplies low voltage to the circuit board Low Pressure Cut Out Switch A manual reset con...

Page 12: ...ere 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 Divider Where the ice is compressed and much of the extra water...

Page 13: ...Shut Down consists of The compressor relay opens The compressor contactor opens The compressor stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evaporator...

Page 14: ...m of each evaporator Reservoir overflow or evaporator condensation is routed to the drain Water cooled models have a separate water circuit for the cooling water it enters the fitting at the rear divi...

Page 15: ...r evaporators get more refrigerant and colder evaporators get less At the evaporator the refrigerant enters an area of relatively low pressure where it can easily boil off or evaporate As it evaporate...

Page 16: ...burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 7 Prepare the c...

Page 17: ...o be checked at least two times per year A Check the bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover unscrewing the auger stud Ins...

Page 18: ...locating pins and out of the unit B Remove two screws and unplug the fan motors D Clean the condenser reassemble by placing the fan motor assembly onto the locating pins replacing the mounting screws...

Page 19: ...off electrical power and water supply 1 To remove the auger remove the front and top panels 2 Remove 3 hex studs holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4...

Page 20: ...the drier evacuate and weigh in the nameplate charge E Check the high pressure cut out if closed go to F if open check 1 The pressure control opens at 400 psig Check the high side pressure reset the c...

Page 21: ...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 bin...

Page 22: ...il 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 above switches have been c...

Page 23: ...leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 25 psig If low assume a refrigerant leak locate recover repair and recharge If no leak the TXV may be...

Page 24: ...emaker 8 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the chute in front of and...

Page 25: ...reaker 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 breaker to remove...

Page 26: ...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 evaporator e If the auger is stuck use a slide hammer type...

Page 27: ...n 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 and clean the mounting area 4 Place a small bead of food grade silastic s...

Page 28: ...ted then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly See To Reassemble Evaporator and Auger T...

Page 29: ...tor 2 Unscrew the 4 cap screws holding the gearmotor to the base of the machine 3 Remove the gearmotor from the icemaker Bench test the gearmotor check for oil leaks noise and amp draw To Inspect the...

Page 30: ...bolts from top end of fan motor assembly see the illustration 4 Lift up and pull out the fan motor assembly 5 Repair as needed 6 To reassemble Place the fan motor assembly lower flange holes over the...

Page 31: ...reclaim or recycle refrigerant The method chosen is up to the service company There are various mechanical devices that may be used to recycle refrigerant at the field level however Scotsman requires...

Page 32: ...the tester into the circuit board 3 Unplug water sen connector from control board 4 Plug water sen connector from Scotsman tester into circuit board Bin Level a Move the bin full switch on the tester...

Reviews: