Scotsman FME1204, NME954 SERVICE MANUAL

INTRODUCTION

NME954 & FME1204

To the owner or user: This manual 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.

This is a modular type ice system that fits a variety of Scotsman ice storage bins.

Its features include: front service for the freezer, gear motor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; a thermostatic expansion valve; and R-404A as the refrigerant.

Table of Contents

FOR THE INSTALLER ······································ Page 2 SAMPLEBINANDMACHINECOMBINATIONS························· Page 3 FOR THE INSTALLER ······································ Page 4 FOR THE INSTALLER: Location ································· Page 5 FORTHEPLUMBER······································· Page 6 FOR THE ELECTRICIAN ····································· Page 7 FOR THE INSTALLER ······································ Page 8 START UP············································· Page 9 COMPONENT DESCRIPTION ·································· Page 10 COMPONENT DESCRIPTION ·································· Page 11 CONTROL BOX: Components ·································· Page 12 ELECTRICAL SEQUENCE: ··································· Page 13 OPERATION: Water········································ Page 14 OPERATION: Performance ···································· Page 15 SANITIZING AND CLEANING ·································· Page 16 SENSORMAINTENANCE ···································· Page 17 BEARING MAINTENANCE ···································· Page 18 MAINTENANCE: Air Cooled···································· Page 19 AUGERMAINTENANCE····································· Page 20 SERVICEDIAGNOSIS······································ Page 21 SERVICEDIAGNOSIS······································ Page 22 CONTROL SYSTEM DIAGNOSTICS ······························· Page 23 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls ··············· Page 24 REMOVAL AND REPLACEMENT: Bearing And Breaker ····················· Page 25 REMOVAL AND REPLACEMENT: Auger····························· Page 26 REMOVAL AND REPLACEMENT: Water Seal ·························· Page 27 REMOVAL AND REPLACEMENT: Evaporator ·························· Page 28 REMOVAL AND REPLACEMENT: Gearmotor ·························· Page 29 REMOVAL AND REPLACEMENT: Fan Blade and Motor····················· Page 30 REFRIGERATION SYSTEM SERVICE ······························ Page 31 What to Do Before Calling for Service······························· Page 32

This manual was printed on recycled paper. Keep it for future reference.

Note the warning symbol where it appears. It marks a possible hazard.

May 2001

Page 1

NME954 & FME1204

FOR THE INSTALLER

BACK VIEW: AIR COOLED

Note: Allow 6" behind

and 6" above either

unit for air circulation,

utility connections,

ELECTRICAL

5.25"

WATER INLET

" FLARE

DRAIN

¾" FPT

2.1"

5.7"

These models are designed to fit the following Scotsman storage bins:

SB480 and extensions (with bin top KBT18)

BH800 using bin top KBT15 (one unit) or KBT25 (two units).

BH801 using bin top KBT28

BH900 with KBT24 (one unit)

BH900 with KBT25 (two units side by side)

INLET

9.5"

Condenser Inlet

Condenser Drain ½" FPT

NME954 Dispenser Applications

The NME954 can be placed on and used with certain ice and ice-beverage dispensers. Kits are required for proper operation:

ID150 use adapter KBT42 and KNUGDIV

ID200 or ID250, use adapter KBT46 and KDIL-N-ID2

Cornelius ED/DF200 beverage dispensers, use KBT46 and KDIL-N-200

BACK VIEW: WATER COOLED

" FPT

DRAIN

¾" FPT

2.9"

3.4"

4.9"

7.46"

ELECTRICAL

INLET

WATER INLET

" FLARE

7.3"

5.25"

9.43"

Cornelius ED/DF250 beverage dispensers, use KBT46 and KDIL-N-250

SPECIFICATIONS: Ice Machine

Model Number Dimensions

(w/o bin)

WxDxH

FME1204AS-3B 21" x 24" x 27" 208-230/60/3 FLAKE Air 8.4 15 30 oz FME1204WS-3A same same FLAKE Water 7.9 15 24 oz FME1204WS-3B same same FLAKE Water 7.9 15 22 oz FME1204AS-32B same 208-230/60/1 FLAKE Air 11.3 15 30 oz FME1204WS-32A same same FLAKE Water 10.8 15 24 oz FME1204WS-32A same same FLAKE Water 10.8 15 22 oz NME954AS-3B same 208-230/60/3 NUGGET Air 8.4 15 30 oz NME954WS-3A same same NUGGET Water 7.9 15 24 oz NME954WS-3B same same NUGGET Water 7.9 15 22 oz NME954AS-32B same 208-230/60/1 NUGGET Air 11.3 15 30 oz NME954WS-32A same same NUGGET Water 10.8 15 24 oz NME954WS-32B same same NUGGET Water 10.8 15 22 oz

Basic Electrical Ice Type Condenser

Lancer nugget IBD, use KDIL-N-L & Lancer kit.

Type

Minimum

Circuit

Ampacity

Maximum Fuse Size

Refrigerant

Charge

R-404A*

* Refrigerant charge change on water cooled. Always check the nameplate for charge data.

December 2004

Page 2

NME954 & FME1204

SAMPLE BIN AND MACHINE COMBINATIONS

The Nameplate is

located on the back

of the machine.

FME1204 ON BH550*

NME954 ON BH800*

May 2001

Page 3

FME1204 ON BH900*

* Bin Top Kit Required

NME954 & FME1204

FOR THE INSTALLER

Notice:

Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL, NSF and CUL.

Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any part and/or other components not specifically approved by Scotsman.

Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and design are subject to change without notice.

Location:

Installation Limitations:

This ice system is designed to be installed indoors, in a controlled environment:

Min Max

Air Temperature 50 Water Temperature 40 Water Pressure 20 PSI 80 PSI

Voltage 198 253 (Compared to the nameplate) Operating the machine outside of the limitations is

misuse and can void the warranty. RO Water Limitation: Water conductivity must be no less than 35 microSiemens/cm. Only install the machine in a location where there

is enough space around it so that it is accessible for service.

Keep the back of air cooled machines a minimum distance of 6" from a wall for air circulation. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the environmental limitations.

F 1000F

Storage Bin:

Tip the storage bin on its back, using parts of the carton to protect the exterior finish. Remove the skid and install the legs into the threaded holes in the bottom of the bin. Turn 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, instead lift it there. Pushing a bin, especially one with ice in it, can cause damage to the legs and the leg mounts.

Install the appropriate bin top on the bin, according to the instructions for the bin top.

Ice Machine:

The machine is heavy, so the use of a mechanical lift is recommended for lifting the machine high enough to install on top of the bin. After the unit is placed on the bin, line it up so it is even with the back side. Secure the machine to the bin with the hardware provided with the machine.

Remove the front panel and remove any shipping blocks.

June 2002

Page 4

FOR THE INSTALLER: Location

A proper installation locates the machine indoors, but in a place where the heat and noise it produces are not objectionable.

Air cooled machines discharge hot air out the back. 6" of space behind the machine is the minimum required for adequate operation of an air cooled unit.

Space for maintenance access is also important. If two units are placed side by side on a bin, side access becomes even more important.

NME954 & FME1204

May 2001

Page 5

NME954 & FME1204

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Water Inlet

Air Cooled Models: The recommended water

supply is clean, cold water. Use tubing, connect to the

" male flare at the back of

the cabinet. Install a hand valve near the machine to control the water supply.

Water Treatment: In most areas, a water filter of some type will be useful. In areas where the water is highly concentrated with minerals the water should be tested by a water treatment specialist, and the recommendations of the specialist regarding filtration and/or treatment should be followed. Water Cooled Models: A separate line is recommended, with a separate hand valve to control it. Connect it to the inlet at the back of the cabinet. The water pressure to all lines must always be above 20 psig, and below 80 psig.

" O.D. copper

" FPT condenser

Drains

Air Cooled Models: Connect a rigid drain tube to

the

" FPT drain fitting at the back of the cabinet.

The drain is a gravity type, and ¼ inch per foot fall is the minimum acceptable pitch for the drain tubing. There should be a vent at the highest point of the drain line, and the ideal drain receptacle would be a trapped and vented floor drain. Use

only Water Cooled Models: Connect a separate drain

line to the back of the cabinet. Do not vent this drain.

Storage Bin: Connect a separate gravity type drain to the ice storage bin drain. Vent this drain if there is a long horizontal run from the bin to the floor drain. Insulation of this drain line is recommended.

Field

Supplied

Filter

" rigid tubing.

" condenser drain connection at the

Hand Valve

WATER

COOLED

Condenser

Inlet

Water Filter

Condenser

Drain

Hand Valve

AIR COOLED

MODELS

Vented

Drain

Water

Inlet

May 2001

Page 6

Floor

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

NME954 & FME1204

Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. The machine requires a solid chassis to earth ground wire.

Connect the power supply to the wires leads in the junction box on the back of the machine.

Connect the ice machine to its own electrical circuit so it is individually fused. Voltage variation must

WATER COOLED

remain within the limitations, even under starting conditions.

All external wiring must conform to national, state, and local electrical codes. The use of a licensed electrician is required to perform the electrical installation.

POWER

SUPPLY

AIR COOLED

May 2001

Page 7

NME954 & FME1204

FOR THE INSTALLER

Final Check List

____1. Is the ice system installed indoors in a

location where the air and water temperatures are controlled, and where they do not exceed the design limitations?

____2. Is there an electrical service disconnect

within sight of the installed machine? Has the voltage been checked, and compared to nameplate 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 service access and air circulation?

____6. Is the water pressure a minimum of 20

psig?

____7. Has the machine been secured to the bin?

____8. Is there clearance over the top of the

machine for service access?

____9. Is there a water shut off valve installed near

the machine?

____10. Have all of the shipping blocks been

removed?

May 2001

Page 8

START UP

Pre-Start Inspection

1. Remove the front and side service panels.

2. Check that any shipping blocks have been removed.

3. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. Check that the fan blades turn freely (air cooled).

4. Check that the unit is installed correctly according to the final check list (page 8).

Start Up

NME954 & FME1204

1. Go through the prestart inspection.

2. Open the 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 (mode) switch on. The electrical start up sequence is automatic. A. There should be a short (15 second) delay

before the gear motor starts. B. After the gear motor starts, the compressor will

start.

4. On air cooled models, the condenser will begin to discharge warm air, on water cooled models, the water regulating 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 may be checked: it should be 32 psig + or - 2 psig.

The suction line temperature at the compressor is normally very cold, nearly to the point of frost up to the compressor body, but not on it.

The air cooled discharge pressure will depend upon air and water temperatures, but should be between 200 psig and 280 psig.

The water cooled discharge pressure should be constant at about 245 psig.

The above numbers are for new, clean machines, you can expect to see some values higher, and some lower between different units.

6. THERE ARE NO ADJUSTMENTS TO MAKE, so replace the panels.

7. Clean and/or sanitize the storage bin interior, wipe off the exterior with a clean, damp cloth.

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

9. Fill out the manufacturer's registration and mail it to Scotsman.

May 2001

Page 9

NME954 & FME1204

COMPONENT DESCRIPTION

Control Box: Contains the electrical controls that operate the machine.

High Pressure Cut Out Switch: An auto-reset switch sensing the high side refrigeration pressure. It will shut the machine off if the discharge pressure should ever exceed 450 psig.

Low Pressure Cut Out Switch: An auto-reset switch sending the low side of the refrigeration system. It will disconnect power to the circuit board and shut down the machine if the low side pressure falls too low.

Evaporator: A vertical stainless steel tube, refrigerated and water filled. In it there is a stainless steel auger.

Compressor: The refrigerant vapor pump. Reservoir: Float operated, it maintains the water

level in the evaporator at a constant level, 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 produced by the evaporator into the storage bin.

Ice Level Sensor: An electronic “eye”, it senses the presence of ice in the bottom of the ice discharge chute. Operates to turn the ice machine on and off automatically as the level of ice in the bin changes.

Gear Motor: An oil filled, speed reduction gearbox, driving the auger.

Drain Tube: When uncapped and lowered, drains the evaporator.

Condenser: Air or water cooled, where the heat removed in ice making is discharged.

Expansion valve: The refrigerant metering device.

Hi Pressure

Cut Out

Low

Pressure

Cut Out

Compressor

AIR COOLED

CONTROL BOX

Reservoir

Condenser

Expansion

Valve

Drain

Tube

Ice Chute

Ice Level

Sensors

May 2001

Page 10

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