Scotsman ND550 Operator’s Manual

INTRODUCTION

ND550

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 maker-dispenser.

The ND550 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. A water station may be added, if desired.

The ND550 ice making section is equipped with the following features: electronic controls for bin

level and low water; thermostatic expansion valve; front service for most components; 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

For the Installer

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

Environmental Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Wall Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Glass Filler Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Soda Valve Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Removal and Replacement

Water Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Breaker and Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Parts Lists and Wiring Diagrams are printed on yellow paper in the center of this manual.

December, 1988

Page 1

115/60/1 115/60/1 115/60/1 115/60/1

16.7

16.2

16.7

16.2

Minimum

Circuit

Ampacity+

Basic

Electrical

20.5"

6.43"

ND550

FOR THE INSTALLER: Specifications

This ice maker-dispenser is designed to be mounted on a machine stand, or a countertop, or using wall mounting kit KWB3, hung from a wall. The sink may be retained, or removed and the optional longer splash panel (KSP1B) installed in place of the original. Instructions for each kit are included in this service manual.

NAMEPLATE

on inside of

right side panel

14.06"

1.88"dia

Before beginning the installation, check that all the materials and kits required are available at the installation location.

3.54"

4.5"

2.56" 3/8" FPT

Condenser Water Inlet (Water Cooled)

ELECTRCIAL JUNCTION BOX

Optional for water and

drain lines

22.5"

1/2" FPT Cond. Drain (Water Cooled)

3/4" FPT Drain

SPECIFICATIONS

Model Number Cabinet

Dimensions

(w/o stand)

Ice

Type

H" x W" x D"

ND550AE-1A

ND550WE-1A

ND550AS-1A

ND550WS-1A

41 x 26 x 22.5

same same same

NUGGET

same same same

Condenser

Type

Air

Water

Air

Water

Finish

Painted

Painted Stainless Stainless

3/8" Flare Potable Water Inlet

12.27"

1.12"

5.12"

3.12"

Maximum

Fuse

Size

20 20 20 20

+ Minimum Circuit Ampacity is used to figure wire size and type per National Electric Code.

August, 1989

Page 2

6" SPACE

FOR AIR

(AIR COOLED)

6" SPACE

FOR AIR

(A/C)

ND550

FOR THE INSTALLER: Environmental Limitations

Installation Limitations

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

Minimum Maximum

Air Temp 50 Water Temp 40

F. 1000F.

F. 1000F. Water Pressure 20 PSI 80 PSI Voltage 104 126 Operating the machine outside of the above

limitations, or outdoors, is potentially damaging to the machine; also it is misuse of the machine, which may void the warranty.

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 CSA.

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.

Water Limitations

An ice machine is a food manufacturing 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 intended as a complete resource for water questions, but it does offer these general recommendations:

1. Filter the water used to produce ice. That is the water going to the "potable" water connection. Water filters vary greatly in ability and function. Install one that filters out suspended solids to a dimension of 5 microns or smaller. The finer the filter the better, but finer filters will clog sooner than course ones. It may be necessary to add a course filter ahead of the fine filter to prolong filter life.

2. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment.

Service Limitations

Do not install in a location where the top of the machine is within 6" of a fixed ceiling. Do not install air cooled models in a location where there is less

CUT AWAY

December, 1988

than 6" clearance to the left and right of the cabinet.

CEILING

CUT AWAY

WALL

SPACE

FOR

UTILITIES

Page 3

SPACE ABOVE

FOR

SERVICE

ND550

FOR THE INSTALLER

Location

After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space above and behind it for service. Air cooled models require a minimum of 6 inches to the left and right of the machine for air circulation.

Machine Stand Installation

Tip the stand on it’s back and install the legs, return the stand to the upright position. Adjust leg levelers so that the stand does not "rock".

Counter Top or Machine Stand Installation

The base of the icemaker-dispenser must be sealed to the object it rests upon. Food grade silastic sealant such as Scotsman part number 19-0529-01 is recommended.

Place a bead of the sealant on the machine stand or counter top to 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 holes in the top that match up with "feet" on the icemaker-dispenser. Place the cabinet onto the machine stand, so that the unit "snaps" into place.

In both counter top and machine stand installations, wipe off and neatly smooth any excess sealant. Level the machine stand and cabinet.

Unpack and install the sink brackets. Fit the sink assembly onto the two sink brackets, and press onto the bead of sealant. Wipe off and neatly smooth any excess sealant from under the sink edge.

SEAL THE

UNIT TO

THE

COUNTER

OR STAND

August, 1989

Page 4

BASE HOLE

ND550

FOR THE INSTALLER: Wall Mount Kit

/////////////////////////WARNING/////////////////////////////// It is recommended that the wall mounting

installation be done by an experienced contractor. The weight of the machine when in use may exceed 350 pounds. The unit should be mounted on a solid, rigid wall with proper fasteners for that type of wall and of adequate strength to support the weight of the machine when in use.

///////////////////////////////////////////////////////////////////////// Clearance between the wall and the icemaker is a

maximum of 1 inch. Check utility connections first. The electrical junction box will have to be removed, and the electrical connections made inside the cabinet in compliance with local codes. The plumbing connections may be made through 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 the side or base.

1. Remove machine top. Attach bracket "A" to machine using (3) nuts, (3) flat washers, (3) lockwashers, and (3) 5/16-18 bolts received with the kit.

30"

7.58"

SIDE

ROUTING

1" CLEARANCE

16"

DO NOT LIFT ON SINK

2. Mount brackets "B" and "C" to the wall at the dimensions shown for the unit. (hardware for this is not included).

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

Use fasteners and wall of sufficient strength to carry the use and weight of the icemaker-dispenser.

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

3. Lift unit up and hook bracket "A" over bracket

12"

"B". Slide unit until the two remaining holes are aligned and secure with the remaining (2) 1/4-20 bolts, flat washers and lockwashers.

December, 1988

Page 5

ADAPTER

FILLER

PLATE

ND550

FOR THE INSTALLER: Water Glass Filler Kit

Installation Instructions for KWGF

///////////////////////////CAUTION//////////////////////////////// Shut off potable water supply to icemaker -

dispenser. ///////////////////////////////////////////////////////////////////////// ///////////////////////////WARNING////////////////////////////

Disconnect electrical power to icemaker dispenser.

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

1. Remove screws, and remove top panel

2. Remove screws, and remove both front panels.

3. Remove screws, and remove the filler plate-scrap the plate.

4. Locate water solenoid valve assembly and two red wires in the kit. Attach the (2) red wires to the solenoid terminals.

5. Locate the water line assembly and the water line adapter. Connect to water solenoid valve. Fitting size will determine location.

6. Remove plug from potable water line.

7. Install valve plate and switch assembly to the dispenser, replace the filler plate removed in step

8. Attach the water solenoid assembly to the underside of the upper compartment using (2) screws and lockwashers into the threaded holes provided.

9. Attach the water line adapter and solenoid valve assembly to water line where plug was removed in step 6.

10. Attach clamp and #8-32 x 3/4 phillips machine screw to secure the water line assembly.

11. Insert glass filler lever through the square slot in the valve plate and switch assembly. Attach to dispenser with (2) arm clamps and (2) #6-32 x 1/2 machine screws.

12. Check and adjust the microswitch so that the glass filler lever pushes the micro-switch button.

13. Attach the glass filler lever spring to glass filler lever. The large hook goes to the filler lever, the small one to the hole in the dispenser base directly below.

PLUG

August, 1989

Page 6

14. Attach the red wire connected to the solenoid to the switch on the valve plate. Attach the blue wire to the switch on the valve plate.

••Route the free red wire from the solenoid,

attach to the terminal strip to the second terminal from the left.

••Route the blue wire from the switch to the

control box, attach the red wire to the terminal strip and attach the blue wire to the leftmost terminal.

15. Turn on water, check for leaks. Replace panels, switch on power supply, check operation.

TOP PANEL

ARM CLAMPS

SPRING

SWITCH

PLATE

ASSEMBLY

VALVE

CLAMP

WATER

LINE

ND550

FOR THE INSTALLER: Soda Valve Kit

Installation Instructions

Note: Carbonator and carbonated product cooling system are not included.

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

Disconnect electrical power to the icemaker dispenser.

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

1. Remove cabinet top panel, front panel, and splash panel.

2. Remove screws and remove filler plate from the ice maker dispenser.

3. Remove large plug from base of icemaker-dispenser.

4. Install valve assembly in the ice machine with two screws through the same holes that held on the valve cover plate. Install 1-3/8" ID insulation tube over the syrup and carbonated lines.

5. Route product lines through the hole in the base.

6. Make all required connections soda line connections, using field supplied materials. All lines should be insulated. A carbonated water recirculating line is provided and 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 drink valve assembly electrical leads up to the transformer.

9. Connect wire leads from the drink valves to the 24 volt output side of the transformer.

10. Locate a 115 volt continuous power source from within the icemaker control box. Route white and black leads from the 115 volt input side of the transformer and connect to the 115 volt power source.

11. Turn on power and soda equipment, check operation and check for leaks. Adjust valves for proper mixture.

115 VOLT CONNICTION

ATTACH DRINK VALVE ASSEMBLY HERE

TRANSFORMER

24 VOLTS

SODA VALVES

SODA LINES

December, 1988

Page 7

ND550

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Water Inlet

Air Cooled Models: The recommended water

supply is clean, cold water. Use 3/8" O.D. copper tubing, connect to the 3/8" 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 3/8" O.D. copper line is recommended, with a separate hand valve to control it. It is connected 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.

WATER INLET

CABINET

DRAIN

OPTIONAL

WATER

FILTER

Drains

Air Cooled Models: There is one 3/4" FPT drain

at the back of the cabinet, the drain line is of the gravity type, and 1/4 inch per foot fall is an 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 3/4" rigid tubing.

Water Cooled Models: In addition to the above mentioned drain, a separate condenser drain must be installed. Connect it to the 1/2" condenser drain connection at the back of the cabinet.

WATER INLET

SHUT OFF

VALVE

VENTED

DRAIN TUBE

FLOOR DRAIN

WATER COOLED DETAIL

CONDENSER

WATER INLET

August, 1989

Page 8

POTABLE

WATER INLET

CABINET

DRAIN

CONDENSER

DRAIN

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

The electrical power to the unit is supplied through the junction box at the rear of the machine.

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.

The ice maker should be connected to its own electrical circuit so it would be individually fused. Voltage variation must remain within design 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.

ND550

ELECTRICAL

POWER

JUNCTION

BOX

December, 1988

Page 9

ND550

FOR THE INSTALLER: Final Check List

1. Is the icemaker-dispenser installed indoors, in a location where the air and water temperatures are controlled, and where they do not go beyond design limitations?

2. is there an electrical service disconnect within sight of the installed machine? Is the machine on a separate circuit? Has the voltage been checked and compared to nameplate requirements?

3. Have all of the plumbing 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 minimum of 6 inches of clearance at the top and back of the machine for service and utility connections?

BACK VIEW OF COMPLETED INTSTALLATION

ELECTRICAL?

LEVELED?

ICEMAKER

DISPENSER

PLUMBING?

Wall mounted only: Is the machine properly

installed and secured to the wall?

7. Is there a water shut off valve installed near the machine?

8. Have all of the shipping blocks been removed?

MACHINE

STAND

August, 1989

Page 10

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).

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.

ND550

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.

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.

December, 1988

Page 11

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