Scotsman NDE554,NDE654 Service Manual

INTRODUCTION

NDE554 & NDE654

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.

This machine is a combination nugget ice maker
and countertop dispenser, with the option of wall
mounting.

Table of Contents

FOR THE INSTALLER: Specifications ······························ Page 2
FOR THE INSTALLER: Environmental Limitations ························ Page 3
FOR THE INSTALLER ······································ Page 4
FOR THE INSTALLER: Wall Mount Kit ······························ Page 5
FOR THE PLUMBER ······································· Page 6
FOR THE ELECTRICIAN ····································· Page 7
FOR THE INSTALLER: Final Check List ····························· Page 8
INITIAL START UP ········································ Page 9
COMPONENT DESCRIPTION ·································· Page 10
COMPONENT DESCRIPTION ·································· Page 11
COMPONENT DESCRIPTION: Control Box ··························· Page 12
ELECTRICAL SEQUENCE ···································· Page 13
OPERATION: Water ······································· Page 14
OPERATION: Refrigeration ···································· Page 15
OPERATION: Ice Vending ···································· Page 16
CLEANING and SANITIZING ··································· Page 17
SENSOR MAINTENANCE ···································· Page 18
BEARING MAINTENANCE ···································· Page 19
AUGER MAINTENANCE ····································· Page 20
SERVICE DIAGNOSIS: ······································ Page 21
SERVICE DIAGNOSIS ······································ Page 22
CONTROL SYSTEM DIAGNOSTICS ······························ Page 23
REMOVAL AND REPLACEMENT ································ Page 24
REMOVAL AND REPLACEMENT: Bearing And Breaker ···················· Page 25
REMOVAL AND REPLACEMENT ································ Page 26
REMOVAL AND REPLACEMENT: Water Seal ·························· Page 27
REMOVAL AND REPLACEMENT ································ Page 28
TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY ·················· Page 29
REFRIGERATION SERVICE ··································· Page 30

The 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 R-404A (HP62)
refrigerant. The ice dispensing section is a
seamless plastic storage bin, with a stainless steel
rotating vane to sweep the ice into the dispensing
chute.

Note this symbol when it appears.

It marks a possible hazard.

March 2000

Page 1

NDE554 & NDE654

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 manual.

20.5"

14.06"

Optional for water

and drain lines

22.5"

Serial Number Plate

inside on upper base

2.56"

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"

3/8" FPT
Condenser
Water Inlet
(Water Cooled)

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

3/4" FPT
Drain

ELECTRICAL JUNCTION BOX

NAMEPLATE

on side panel

3/8" Flare
Potable Water Inlet

5.12"

12.27"

3.12"

1.12"

6.43"

SPECIFICATIONS

Model Number Dimensions

w"xd"xh"

NDE554AS-1A 26 x 22

1

x 41 Air 115/60/1 19.1 25 24

2

NDE554WS-1A same Water same 17.9 20 18
NDE554AS-6A same Air 230/50/1 24
NDE554WS-6A same Water same 18
NDE654AS-1A 26 x 22

1

x 48 Air 115/60/1 19.3 25 24

2

NDE654WS-1A same Water same 17.8 20 18
NDE654AS-6A same Air 230/50/1 24
NDE654WS-6A same Water same 18

Condenser
Type

Basic Electrical Min. Circ.

Ampacity

March 2000

Page 2

Max
Fuse
Size

Ref. Charge
R-404A (oz)

NDE554 & NDE654

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 (115v) 104 126
Voltage (240v) 207 253
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 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.

CUT AWAY

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
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.

6" SPACE

FOR AIR

(A/C)

Airflow

SPACE

FOR

UTILITIES

6" SPACE

FOR AIR

March 2000

Page 3

NDE554 & NDE654

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 its 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.

Follow the instructions packed with the machine
stand for proper connection to the dispenser. The
dispenser must be bolted to the machine stand
from inside the stand.

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.

The hardware for the sink brackets is packed with
the sink. Screw one bolt into all four holes to tap
them BEFORE attaching the brackets. Attach the
brackets and place the sink assembly onto the two
sink brackets. Push down at the back to seat the
sink onto the brackets.

Press the sink 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

March 2000

Page 4

FOR THE INSTALLER: Wall Mount Kit

CAUTION

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) lock
washers, and (3) 5/16-18 bolts received with the
kit.

X"

7.58

NDE554 & NDE654

1" CLEARANCE

BASE
HOLE

SIDE

ROUTING

X = 30" for NDE554

X = 38.6" for NDE654

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 lock washers.

C

March 2000

Page 5

NDE554 & NDE654

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Water Inlet

Air Cooled Models: Connect a potable, cold water

supply to the 3/8" male flare at the back of the
cabinet. Install a hand valve near the machine to
control the water supply. 3/8" O.D. copper tubing is
recommended.

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: Connect a separate 3/8"
O.D. copper line with a separate hand valve to
control it to the 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 80 psig.

WATER INLET

CABINET

DRAIN

OPTIONAL

WATER

FILTER

Drains

Air Cooled Models: There is one ¾ " FPT drain at

the back of the cabinet, the drain line is of the
gravity type, and ¼ 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 ¾ " rigid tubing.

Water Cooled Models: In addition to the above
mentioned drain, a separate condenser drain must
be installed. Connect it to the ½ " 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 2000

Page 6

POTABLE

WATER INLET

CABINET

DRAIN

CONDENSER

DRAIN

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

Connect the electrical power to the unit
to the power leads in 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.

NDE554 & NDE654

ELECTRICAL

POWER

JUNCTION

BOX

March 2000

Page 7

NDE554 & NDE654

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 INSTALLATION

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 2000

Page 8

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).

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.

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 automatic:

A. There will be a short (15 second) delay before
the gearmotor starts.

B. After the gearmotor starts, the compressor will
start.

NDE554 & NDE654

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 with a
locally approved sanitizer. A possible sanitizer is a
mixture of 1 ounce of household bleach to 2
gallons of water. Wash the interior of the bin with
the sanitizer. 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.

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
38 PSIG + or - 2 PSIG.

The air cooled discharge pressure will depend
upon air and water temperatures, but should be
between 240 PSIG and 340 PSIG.

Water cooled discharge pressure should be about
245 PSIG. If needed, adjust the water regulating
valve.

The above numbers are for new, clean machines.
Field values may be somewhat higher or lower.

6. There are no adjustments to make, so replace
the panels.

7. Check ice dispensing by pushing in on the glass
filler lever.

March 2000

10. Fill out the Customer Evaluation and Warranty
Registration form, and mail it in to Scotsman.

Page 9