Scotsman ND650 Operator’s Manual

INTRODUCTION

ND650

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 ND650 is a combination nugget ice maker and
countertop dispenser, with the option of wall
mounting. A water station is standard.

The ND650 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

Soda Valve Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Removal and Replacement

Water Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Breaker and Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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

March, 1989

Page 1

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

17.2

16.2

17.2

16.2

Minimum

Circuit

Ampacity+

Basic

Electrical

20.5"

6.43"

ND650

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 (KSP1) 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"

19.19"

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"

1.88" dia

12.25"

2.56"
3/8" FPT

Condenser
Water Inlet
(Water Cooled)

ELECTRCIAL JUNCTION BOX

Optional for water and

drain lines

21.5"

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"

ND650AE-1A

ND650WE-1A

ND650AS-1A

ND650WS-1A

48.88 x 26 x 21.5
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 determine wire size and type per National Electric Code.

March, 1989

Page 2

6" SPACE

FOR AIR

(AIR COOLED)

6" SPACE

FOR AIR

(A/C)

ND650

FOR THE INSTALLER: Environmental Limitations

Installation Limitations

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

Minimum Maximum

0

Air Temp 50
Water Temp 40

F. 1000F.

0

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.

CUT AWAY

air cooled models in a location where there is less
than 6" clearance to the left and right of the
cabinet.

CEILING

CUT AWAY

WALL

SPACE
ABOVE

FOR

SERVICE

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

SPACE

FOR

UTILITIES

March, 1989

Page 3

ND650

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. Remove the
splash panel. Fit the sink assembly onto the two
sink brackets (push the sink down over the
brackets at the back), connect the drain, and press
the sink onto the bead of sealant. Wipe off and

SEAL THE

UNIT TO

THE

COUNTER

OR STAND

ATTACH SINK

DRAIN TO CABINET

DRAIN WITH

RUBBER TUBE

BRACKET

2 SCREWS PER

BRACKET

ATTACH

BRACKET

neatly smooth any excess sealant from under the
sink edge. Replace the splash panel.

March, 1989

Page 4

BASE
HOLE

ND650

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.

38.6"

7.83"

SIDE

ROUTING

1" CLEARANCE

16"

16"

A

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).

B

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

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"

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.

C

March, 1989

Page 5

ND650

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
Note: The water glass filler station will have to be

removed, this includes: glass filler lever, water
tube, spring, as well as the filler plate with the
switch on it. The solenoid valve may be left in
place.

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

March, 1989

Page 6

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.

ND650

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

March, 1989

Page 7

POTABLE

WATER INLET

CABINET

DRAIN

CONDENSER

DRAIN

ND650

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.

ELECTRICAL

POWER

JUNCTION

BOX

March, 1989

Page 8

ND650

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

March, 1989

Page 9

ND650

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.

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.

March, 1989

Page 10

COMPONENT DESCRIPTION

EVAPORATOR

HIGH PRESSURE

CUT OUT

ND650

Control Box: Contains the electrical controls that

operate the machine.
High Pressure Cut Out Switch: A manual reset

switch sensing the high side refrigeration pressure.
It is set to shut the machine off, and illuminate the
reset switch light if the discharge pressure should
ever exceed 450 psig.

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

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 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.

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 Assembly: A
plastic lined, insulated cylinder
that receives, stores and
dispenses the ice. Fresh ice
enters at the top, and when the
bin is full enough the ice will be
between the ice level sensors,
and the icemaking will stop. Ice
is dispensed through a chute at
the bottom front when the
agitator assembly sweeps the
ice over the chute.

Glass Filler Lever: Pushing in
on this lever causes the ice
dispensing cycle to occur.

Portion Control Knob:

CONDENSER

Turning this knob adjusts the
length of time of dispense.

LOW PRESSURE

Low Pressure Cut Out Switch: A manual reset

control that shuts off the ice machine when the low
side pressure drops below a preset point, 0-4 psig.

ICE LEVEL SENSORS

CUT OUT

March, 1989

PORTION

CONTROL

Page 11

WATER LEVEL

SENSOR

RESERVOIR

CONTROL

BOX

DRAIN TUBE

ICE STORAGE BIN

GLASS FILLER LEVER