Scotsman NS650 Installation Manual
INTRODUCTION
NS650
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.
TABLE OF CONTENTS
Installation
For the Installer
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
The NS650 is a complete ice system that
produces and stores nugget ice.
It features: front service for the condenser,
control box, and water reservoir; a slide out
chassis; an electronic circuit for monitoring ice
and water level; a thermostatic expansion
valve; and R-502 as the refrigerant.
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Removal and Replacement
Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Slide Out Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
December, 1988
Page 1
Minimum
Circuit
Ampacity
25
20
11.97"
Condenser Drain
1/2 FPT
(Water Cooled)
NS650
FOR THE INSTALLER
BACK VIEW
WATER INLET
3/8" FLARE
BIN DRAIN
3/4" FPT
RES DRAIN
38.06"
3/4" FPT
32.08"
15"
3.62"
ELECTRICAL
INLET
Condenser Inlet
3/8 FPT
(Water Cooled)
9.97"
1.77"
5.77"
9.27"
3"
Note: Allow 6"
behind and 6" to
the left of the unit
for air circulation,
utility connections,
and service.
33.14"
When installing a new system, check to be
sure that you have everything you need
before beginning:
Correct Ice Machine (air or water cooled)
All kits, legs, and information required for
the specific job.
The normal finish for the ice machine is
enamel-sandalwood. A stainless steel panel
kit, SPKNS650 may be field installed to
convert the unit to a stainless steel finish.
SPECIFICATIONS: ICE MAKER
Model Number
NS650AE-1A
NS650WE-1A
Diminsions
(w/o legs)
H x W x D
37.5" x 38.06" x 29.5"
same
Basic
Electrical
115/60/1
same
Installation Limitations:
This ice system is designed to be installed
indoors, in a controlled environment:
Min Max
Air Temperature 50
Water Temperature 40
0
F 1000F
0
F 1000F
Water Pressure 20 PSI 80 PSI
Voltage -5% +10%
(Compared to the nameplate)
Operating the machine outside of the
limitations is misuse and can void the warranty.
Ice Type
NUGGET
same
Condenser
Type
Air
Water
Max
Fuse
Size
35
30
Comp.
H.P.
3/4
3/4
Note: Minimum Circuit Ampacity is used to determine wire size and type per national electric code.
December, 1988
Page 2
FOR THE INSTALLER: Environmental Limitations
NS650
Location
After uncrating the machine, and inspecting it
for freight damage, the unit is ready for
installation.
It is important that the machine be installed in
a location where it has enough space for
service access. The unit will require removal
of the top panel for some service, so in under
counter applications, the unit will either have
to be pulled out, or the
countertop will have to
be removable.
Utility installation
needs some space at
the back of the cabinet,
the minimum is 6
inches.
On air cooled models,
the air flow must be
given consideration:
the unit takes in air
from the front, and
exhausts it through the
left and back panels.
These areas require at
least 6 inches of air
space to exhaust the
hot air.
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.
Legs
The legs (when used)
may now be installed.
Either use a
mechanical lift to
hoist the cabinet high
enough to screw in
the legs, or carefully
lay the unit on its
back (using portions
of the carton to
protect the back
panel) and screw the
legs in. Note: the legs
must be threaded in
all the way for
maximum strength.
When ready, do not
push the machine
into position, pushing may damage the floor,
and/or the legs mounts. Use a mechanical lift,
and set the unit in it’s selected location.
Level the unit, using the adjustable leg
levelers: both in the front to back and left to
right directions.
Unscrew it’s two screws and take off the front
panel. Remove any packing material
(styrofoam blocks or cardboard sheets) that
may be there.
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.
December, 1988
Page 3
FIELD
SUPPLIED
FILTER
VENTED
DRAIN
NS650
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.
HAND
VALVE
WATER
INLET
WATER
COOLED
MODEL
VENTED
DRAIN
CONDENSER
DRAIN
Drains
Air Cooled Models: There are two
3/4" FPT drains at the back of the
cabinet. Drain lines are 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 each 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 drains, a
separate condenser drain must be
installed. Connect it to the 1/2"
condenser drain connection at the
back of the cabinet.
CONDENSER
INLET
FLOOR DRAIN
December, 1988
Page 4
FOR THE ELECTRICIAN
POWER
SUPPLY
CONFORM TO ALL APPLICABLE CODES
NS650
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.
JUNCTION
BOX
December, 1988
Page 5
NS650
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 been leveled?
LEVELED?
5. Is there a minimum of 6" clearance at the
back and left sideof the machine for proper
service access and air circulation? (air cooled)
6. Is the water pressure a minimum of 20 psig?
7.Is the unit grounded?
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?
POWER
SUPPLY?
WATER
SUPPLY?
DRAINS?
December, 1988
Page 6
START UP
NS650
Pre-Start Inspection
1. Remove the front panels.
2. Check that the styrofoam shipping blocks
have been removed.
Start Up
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 switch on.
The electrical start up sequence is now on
automatic.
A. There should be a short (15 second) delay
before the gearmotor starts.
B. After the gearmotor 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.
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 blade turns freely (air cooled).
4. Check that the unit is installed correctly
according to the final check list (page 7).
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 220 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.
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 temperature at the
compressor is normally very cold, nearly to the
point of frost up to the compressor body, but
not on it.
December, 1988
9. Fill out the manufacturers registration card,
and mail it to the Scotsman Factory.
10. Fill out the field quality audit form, and mail
it to the Scotsman factory.
Page 7
CONTROL BOX
COMPRESSOR
ICE ACCESS
DOOR
NS650
COMPONENT DESCRIPTION
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.
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 CHUTE
ICE LEVEL
SENSORS
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.
Condenser: Air or water cooled, where the
heat removed in ice making is discharged.
Expansion valve: The refrigerant metering
device.
WATER COOLED
EXPANSION
VALVE
GEARMOTOR
HIGH
PRESSURE
CUT OUT
ICE
STORAGE
BIN
RESERVOIR
AND WATER
LEVEL SENSOR
WATER
REGULATING
VALVE
CONDENSER
December, 1988
Page 8
COMPONENT DESCRIPTION: Control Box
TRANSFORMER
NS650
Contactor: A definite purpose contactor
connecting the compressor and the remote
condenser fan motor to the power supply.
Circuit Board: Controlling the ice machine
through sensors and relays. The sensors are
for ice level and water level. The relays are for
the gear motor (with a built in time delay to
clear the evaporator of ice when the unit turns
off) and for the compressor. The reset switch
is mounted on the circuit board.
Transformer: Supplies low voltage to the
circuit board.
START
CAPACITOR
LOW PRESSURE
CUT OUT SWITCH
POTENTIAL
RELAY
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.
Potential Relay: The compressor start relay.
On/Off Switch: Manual control for the
machine.
Reset Switch: Part of Circuit Board, manual
reset. Lights up when unit shuts off from: ice
discharge chute being overfilled (opening the
microswitch at the top of the chute); low or
high pressure switches opening.
RESET SWITCH
CIRCUIT
BOARD
ON/OFF SWITCH
CONTACTOR
December, 1988
Page 9
NS650
COMPONENT DESCRIPTION
Evaporator: A refrigerated vertical tube filled
with water and containing a water seal and
auger.
Auger: A solid stainless steel double spiral
auger, it pushes the ice crystals up to the top
of the evaporator.
Water Seal: A two part "face" seal, the top half
rotating with the auger, the bottom half
stationary, the sealing action being where the
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: Where the ice is compressed and
much of the extra water is squeezed out of it
before it is discharged into the bin.
Motor: A permanent split capacitor motor that
drives the gear reducer.
Thrust Bearing: As the ice is pushed up the
evaporator, the auger is thrust down, and
pressure from the auger thrust is taken up by
this bearing.
ICE SWEEP
BEARING
BREAKER
WATER
SEAL
AUGER
EVAPORATOR
December, 1988
Page 10
MOTOR
Loading...