Scotsman NM950 Скачать руководство пользователя страница 1 | Manualshive

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Scotsman NM950 Скачать руководство пользователя страница 1

INTRODUCTION

To the owner or user: The service manual you
are reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.

The NM950 is a modular ice system that fits a
variety of Scotsman ice storage bins.
It features: front service for the freezer,
gearmotor, control box, water reservoir, and
bin control; an electronic circuit for monitoring
ice and water level; a thermostatic expansion
valve; and R-502 as the refrigerant.

TABLE OF CONTENTS

Installation

For the Installer

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Two units on one bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Service Diagnosis

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Removal and Replacement

Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.

NM950

March, 1989

Page 1

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Содержание NM950

Страница 1: ...ice and water level a thermostatic expansion valve and R 502 as the refrigerant TABLE OF CONTENTS Installation For the Installer Specifications 2 Location 4 Two units on one bin 5 For the Plumber 6 F...

Страница 2: ...umber NM950AE 3A NM950WE 3A NM950AE 32A NM950WE 32A Dimensions w o bin H X W X D 27 x 21 x 24 same same same Basic Electrical 208 230 60 3 same 208 230 60 1 same Ice Type Nugget same same same Condens...

Страница 3: ...effective in all situations That is why a water test is important Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance They meet or exceed the standar...

Страница 4: ...n 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 Pushin...

Страница 5: ...FOR THE INSTALLER Location TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE S NM950 March 1989 Page 5...

Страница 6: ...e 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 back of the cabinet the drain line is of the gravit...

Страница 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 lim...

Страница 8: ...plate 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...

Страница 9: ...valve will open and warm water will be discharged into the drain 5 The unit should soon be making ice if desired the low side pressure can be checked it should be 30 psig or 4 psig The suction line t...

Страница 10: ...l it also contains the water level sensor Water Level Sensor Senses if there is water in the reservoir to make ice out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice...

Страница 11: ...n the circuit board Transformer Supplies low voltage to the circuit board Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops below a pre...

Страница 12: ...e 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 is squ...

Страница 13: ...er motor relay opens and the auger motor stops If the ice level sensor is clear bin empty for more than 15 seconds the machine will start up again Another purpose of the circuit board is to turn the m...

Страница 14: ...he bottom of the 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 re...

Страница 15: ...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 pressure where it can...

Страница 16: ...osphoric 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 externa...

Страница 17: ...buildup 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 unscrewing the ice sweep removing the water shed using a sp...

Страница 18: ...electrical power and remove the filter The filter may be cleaned or replaced B Clean the condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with...

Страница 19: ...off electrical power and turn off the 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...

Страница 20: ...arge E Check the high pressure cut out if closed go to F if open check 1 The pressure control opens at 450 psig Check the high side pressure reset the control and observe on water cooled that water so...

Страница 21: ...n 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...

Страница 22: ...oil 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...

Страница 23: ...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...

Страница 24: ...cemaker 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...

Страница 25: ...ker 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 th...

Страница 26: ...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 puller to pull on the auger at the th...

Страница 27: ...wn 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...

Страница 28: ...d 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 To...

Страница 29: ...are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too high carefully inspect the bearings and ge...

Страница 30: ...that the ice level sensors are properly aligned clean and not obstructed use the tester as follows Bin Control Note All testing is done with the electrical power on the master switch on and all reset...

Страница 31: ...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 go OFF If not replace the circuit board If the light does go off replac...

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