Scotsman SCE170 Operator’s Manual
Introduction
SCE170
To the owner or user: This service manual is
intended to provide you, and the maintenance or
service technician, with the information needed to
install, start up, clean, maintain and repair this
product.
The SCE170 is an ice machine that produces
cubed ice on a grid type freezing surface. The
cubes form into a cluster that falls into the ice
storage bin where they break up into individual
and small groups of cubes.
The SCE170 automatically maintains the level of
ice by turning on when the ice level falls, and
switches off when the bin is full.
This unit is serviceable in place; the ice storage bin
and hood may be removed from the chassis to
allow service access without removing the ice
machine from its installed position. The
refrigeration system uses HP62 as the refrigerant.
Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
For The Installer: Environmental Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Removal of the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sanitzing and Water System Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Water Schematic: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Refrigeration Schematic: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Technical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Removal and Replacement: Cube Size Control . . . . . . . . . . . . . . . . . . . . . . . . . 22
Removal and Replacement: Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Removal and Replacement: Float Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Removal and Replacement: Curtain & Bin Control . . . . . . . . . . . . . . . . . . . . . . . . 25
Removal and Replacement: Purge Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Refrigeration System Service: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Parts lists and wiring diagrams are located in
the center of this manual, printed on yellow
paper .
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October 1998
Page 1
SCE170
Specifications
The unit is equipped with an electrical power
cord, but should only be plugged into a circuit
dedicated to the ice machine.
THE NAMEPLATE IS LOCATED
ON THE BACK PANEL.
A SERIAL NUMBER PLATE IS
LOCATED BEHIND THE RIGHT
FRONT PANEL, ON THE BASE IN
FRONT OF THE CONTROL BOX
Model
Number
SCE170A-1A
SCE170A-1C SAME SAME SAME Air 10 see page 18
SCE170W-1A SAME SAME SAME Water 10 see page 18
SCE170W-1C SAME SAME SAME Water 10 see page 18
SCE170A-6C same 230/50/1 SAME Air 5 1150 see page 18
SCE170W-6C same 230/50/1 SAME Water 5 1150 see page 18
Note: A scoop and legs are included. Power Cord Supplied.
Dimensions
(w/o) legs
H" x W" x D"
1
33 x 24
⁄4x24
Basic
Electrical
115/60/1 “Half-Dice”
Ice Type Condenser
Cube
June 2002
Page 2
Total
Type
Air 10 see page 18
Load
Amps
Total
Wattage
Refrigerant
HP62
(R-404a)
Serial
Number
Plate
(Behind Grill)
For The Installer: Environmental Limitations
The ice machine must be installed indoors in a
controlled environment.
Minimum Maximum
Air Temp 50
Water Temp 40
Water Pressure 20 PSI 80 PSI
Volt age 103.5 126.5
0
F. 1000F.
0
F. 1000F.
SCE170
Air Out
Operating the ice machine outside of the above
limitations, or outdoors, is potentially damaging to
the machine, and it is misuse of the machine. This
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.
October 1998
Air In
Airflow on air cooled models is:
Intake through the right front grill.
•
Exhaust through the left front grill.
•
Do not install where this air flow is obstructed.
The SCE170 has a removable cabinet. When
installed, the machine should have some extra
clearance (
the cabinet may be easily removed when the
machine is in place.
Page 3
1
") on the left and right sides so that
⁄
8
SCE170
Installation
Water
The water supply for this ice machine has been in
contact with many materials since it fell from the
sky as rain. All rain is slightly acidic, and tends to
dissolve the materials it comes in contact with.
During water’s journey to the ice machine, it has
flowed over and through the ground, been picked
up by a municipal or private pump, forced through
a series of pipes of differing construct ion and may
have been treated by the municipality providing
the water.
The water supplied to this ice machine will then
contain a variety of substances that will likely show
up as solids during the ice making process. These
solids are similar to those found when water is
boiled out of a saucepan. Only the water boils
away, and the minerals that were in the water
solidify in the pan. During ice making only the
water is frozen into ice, the minerals stay behind in
the reservoir. This machine pumps out the water in
the reservoir every cycle to minimize the amount of
minerals in the water system, but after time the
minerals will appear and have to be dissolved by
ice machine cleaner , t hen f l ushed away dur ing t he
cleaning process.
An ice machine is a food manufacturing plant; it
takes a raw material, in this case water, and
transforms it into a food product, ice. The purit y of
the water is very important in obtaining pure ice
and in maximizing product life.
The water to the ice machine should be filtered.
Water filters vary greatly in ability and function.
Install one that filters out suspended solids to a
dimension of 5 microns or less. The finer the filter
the better, but finer filters may plug-up sooner than
course ones. It may be necessary to add a course
filter ahead of the fine filter to prolong f ilt er lif e.
This ice machine may be installed in the open or
under a counter. No clearance is required at the
sides or top beyond what’s needed to place the
cabinet into position. Air cooled models blow air in
and out through the grills at the front. Space is
required for utility connections at the back.
The ice machine is not designed for outdoor
use. It must be installed indoors, in a
controlled environment. The air and water
temperatures must not exceed rated limits.
Electrical power is supplied through a cord
connected to the unit. All local codes must be
followed.
Pre-installation:
1. Inspect the place where the ice machine is to be
installed. Check for:
space for the cabinet,
•
water supply,
•
drain availability
•
and electrical power supply.
•
No extension cords are allowed. The building drain
inlet must be lower than the drain outlets at the
back of the ice machine. The water supply must
have a hand shut off valve accessible when the
unit is installed.
2. Determine the method of installation, is the
machine to be installed under the counter? Is the
drain in the floor under the machine? Is the water
inlet valve accessible?
Have the water tested. Acidic water or alkaline
water will both cause corrosion. Dissolved solids
cannot be filtered out. Check with a water
treatment specialist regarding testing, treatment
and filters.
October 1998
Page 4
Installation
SCE170
For The Plumber
1. Connect cold potable water to the
3
" male flare
⁄
8
at the top back of the cabinet. A water filter is
recommended. Flush the water line prior to
connecting to the ice machine.
If water cooled, connect a separate water inlet line
to the water cooled condenser inlet fitting. It should
also have a hand shut off valve.
A loop of copper t ubing may be used bet ween t he
ice machine and the water supply. This will allow
the ice machine to be pulled out from its installed
location without disconnecting the water line. No
back-flow preventer should be needed in the inlet
potable water line because provision for that is
incorporated in this N.S.F. listed product (the float
seat is above the reservoir wall and cannot siphon).
2. Connect a drain tube to each drain. The drain
tubes from these connections must be run
separately. There are two connections at the
back of the cabinet,
one is the bin drain
and the other is the
purge drain. Both
3
are
" F.P.T. brass
⁄
4
fittings.
Bin Drain
Vent
Drain tube material must be rigid and meet local
code.
Traps in the bin drain line without vent s ahead of
them will cause poor draining.
The bin drain must be vented if there is a long
horizontal run (5’ or more). The purge drain
must also be vented.
All drains are gravity, and
must have a minimum fall of 1/4" per foot of
horizontal run. The water cooled condenser drain
should not be vented, and is routed separately.
Maintain the air gap required by local code
between the end of the drain tubes and the
building drain receptacle.
Note: Drain tubing should be insulated to prevent
condensation from forming on the tubing.
CONFORM TO ALL LOCAL CODES
Note: The unit is designed for drain connections
on the outside of the cabinet. To connect the
drains inside would require the removal of the
drain fittings attached to the back panel, and field
fabricated drain tubes routed inside the base of the
unit.
Purge Valve
Drain Vent
Bin Drain
Floor Drain
Air Cooled
Plumbing
Connections
Note: Recommended
Drain Vent Vertical
Tube Length is 24"
Bin Drain
Vent
Bin Drain
Condenser Drain
Potable Water
Inlet
October 1998
Page 5
Water Cooled
Plumbing
Connections
Purge Valve
Drain Vent
Potable
Water Inlet
Condenser Water
Inlet
Purge Drain
SCE170
Installation
For The Electrician
This is a cord-connected unit, and must be on a
separate 115 volt AC 60 cycle single phase power
supply. The maximum fuse size for this circuit
should be 15 amps, per the nameplate use fuses,
or HACR circuit breakers.
Follow All Local Codes - This Unit Must Be
Grounded.
disable or by-pass ground prong on electrical plug.
1. Level the cabinet, use the leg levelers on the
end of the legs to adjust the cabinet height. (Legs
should have been installed when the unit was
unpacked).
2. Wash out the bin and hood. I f desir ed, t he
interior of the bin could be sanitized.
Do not use extension cords and do not
After Utility Connections:
3. Locate the scoop, wash it and have it available
for use when needed.
Final Check List
1. Is the ice maker cabinet in a room where
ambient temperatures are within the minimum and
maximum temperatures specified?
2. Has the water supply been connected?
3. Is the water pressure adequate?
4. Have the water connections been checked for
water leaks?
5. Have the drain connections been made?
6. Have the drain connections been checked for
leaks?
7. Is the cabinet level?
8. Is the ice machine plugged into a 115 volt
electrical power supply and is the ice machine the
only load on that circuit?
9. Has all of the shipping material been removed
from the inside of the cabinet?
10. Has the bin and cabinet been wiped clean and
sanitized?
11. Has the Customer Evaluation & Warranty
Registration form been filled out? Check for correct
model and serial numbers from the nameplate,
then mail the completed form to Scotsman.
12. Has the owner/user been given the name and
telephone number of the authorized Scotsman
Service Agency serving that location?
13. To start up machine, follow the directions on
page 10. For more information on the unit, t ur n t o
the next page.
October 1998
Page 6
Removal of the Cabinet
SCE170
One of the most useful features of this ice machine
is the ability to remove the cabinet from the ice
machine without removing the ice machine from its
installed position.
To Remove:
1. Switch the master switch to OFF. Be certain the
ice machine has been switched off.
2. Open the bin door and unscrew the knobs at the
left and right inside of the ice storage bin. Unscrew
the knobs all the way out.
3. Pull the hood and door assembly straight out
until it can be lifted up. Caution: the door will be
free to come out the back of the hood when
removed from the cabinet base.
4. To remove the cabinet base the hood must be
removed first.
5. Remove 4 screws and the two grills at the front
of the base.
6. In the area exposed when the grills are removed
are two knobs similar to those removed in step 2.
Unscrew and remove the two knobs.
STEP 2
STEP 3
Hood
7. Locate bin drain. Loosen hose clamp holding
drain tube to fitting and pull the drain tube off of the
fitting.
8. Lift up the front of the base and rotate the base
up and off of the ice machine.
The machine is now exposed for service.
STEP 8
STEP 5
STEP 6
Bin Drain
October 1998
Page 7
SCE170
Component Location
The ice machine is designed for front service.
Many components are serviceable from the front
without removing the cabinet. With the cabinet
removed, nearly all components are serviceable.
In the bin area can be found:
Water pump
•
Float valve
•
Reservoir
•
Evaporator
•
Curtain
•
Water distributor
•
Water Distributor
Water Pump
Behind the right front grill on the front edge of the
control box:
Control box with cube size control adjustment
•
ON/OFF/CLEAN switch
•
Manual Harvest switch
•
Purge switch
•
Inside the control box is control system for the ice
machine.
When the bin is removed, the condensing unit is
visible.
Evaporator
Curtain
Float Valve
Reservoir
Component Location
Control
Box
Hi Pressure Cut
Out Switch
October 1998
Page 8
Component Description
SCE170
Water Pump
During the freeze cycle, the water pump moves the
water from the reservoir to the water distributor at
the top of the evaporator. During the harvest
cycle, the water pump moves water from the
reservoir to the purge valve and down the drain.
Float
The float valve controls the water flow into the
reservoir. When the water level drops in the
reservoir, the float also drops and opens the valve.
Note: water flow to this ice machine is controlled
by a flow control within the float valve.
Shut Off Valve
There is a water shut off valve located just above
the float valve. Pushing the valve button controls
the water flow to the float valve.
Reservoir
The place where the water pump picks up water to
pump, and a return trough for water flowing from
the evaporator.
Curtain
There is a curtain to cover the ice making side of
the evaporator. The curtain keeps water from
flowing into the ice storage bin, and, through the
curtain sensor, controls the harvest time and on/off
operation of the ice machine. There are two
indicator lights for the curtain on the control board.
Both lights will be ON when the curtain is fully
closed.
Note: If the unit is in the Freeze Cycle, the Curtain
can be moved/removed without disturbing the
operation of the machine.
Water Distributor
The water distributor is an assembly of two tubes
(one inside the other) that evenly distributes water
over the evaporator.
Purge Valve
The purge valve opens during the harvest cycle,
allowing the water pump to pump reservoir water
down the drain. This dilutes the reservoir’s
concentration of minerals that remain after water is
made into ice.
High Pressure Cut Out
This is a switch that opens to stop the ice machine
when the internal refrigeration pressures become
too high (over 450 PSIG). It is a manual reset on
all water cooled machines and all air cooled
machines built prior to October 1998, after that t he
air cooled models use an automatic reset switch.
ON/OFF/CLEAN Switch
This switch is the main manual control for the ice
machine.
Purge Switch
This switch operates the purge valve ONLY when
the ON/OFF/CLEAN switch is in the Clean
position. Used when cleaning the ice machine.
Manual Harvest Switch
This switch puts the machine into the harvest
cycle, used when cleaning or servicing the
machine.
Cube Size Control
The cube size control is a reverse-acting
thermostat the controls the start of t he t i med
freeze cycle. It must be set properly to provide the
correct size cube bridge. When it is Closed, an
indicator light on the control board will be ON.
Strainer
There is a strainer in the inlet water line to keep
large particles that may be in the water supply
from plugging up the float valve. The strainer may
be cleaned if it becomes restricted.
Hot Gas Valve
The hot gas valve is a refrigeration component
used to by-pass the condenser and force warm
refrigerant into the evaporator during t he har vest
cycle.
Evaporator
Where the ice is formed. It is a vertical, 5 row by
26 column, all copper , nickel-plated evaporator.
The outside edges of the evaporator are enclosed
in plastic to keep water out.
Thermostatic Expansion Valve
The thermostatic expansion valve is used to meter
liquid refrigerant into the evaporator, adjusting the
flow of refrigerant as required to make ice.
October 1998
Page 9
SCE170
Initial Start Up
After the final check list has been gone through,
the ice machine may be started up.
1. Open the bin door, open the water shut off valve
and watch the reservoir fill with water. The water
level should be about 1 5/8" from the top front
edge of the reservoir when the valve shuts off.
Adjust water level only if more than 1/4" off normal.
2. Pull open and release the curtain to check that it
moves freely and closes completely. Check that bin
control sensor is in line with the magnet in the
curtain. Reposition curtain and/or sensor to their
normal positions to bring these two components in
line.
Front View of Left End of Curtain
Bin
Control
Sensor
8. The water temperature in the reservoir will soon
o
be 32
evaporator. Note: In most cases some slush will
form in the reservoir. This is temporary and normal.
9. Allow the ice machine to operate for about 15-20
minutes. The ice should be fully formed and should
be harvested within a few minutes.
Note: The machine may make a “cracking” noise a
few minutes before harvest. This is the normal
sound of the ice expanding.
Magnet
(in curtain)
F., and ice should begin to form on the
Sensor and Magnet
Should Be In Line
With Each Other
3. Remove two screws and the right grill.
4. Switch the ON/OFF/CLEAN switch to CLEAN.
5. Move the Purge Switch, check that the machine
pumps water out thru the purge drain. If no water
flows out, correct drain and/or check valve.
6. Switch the ON/OFF/CLEAN switch to ON.
7. On air cooled models the fan motor will begin to
turn, and warm air will be discharged from the left
front of the ice machine.
On water cooled models warm water will begin to
flow from the condenser drain.
Curtain
March 2002
Page 10
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