Scotsman CME1002R Owner’s Manual

INTRODUCTION

Note this symbol where it appears.

CME865R & CME1002R

This manual is intended as a reference for the
installation and service of a Scotsman ice maker
model CME865R or CME1002R.

This model is a remote condenser cuber, 30" wide
and should be connected to a Scotsman remote
condenser.

Table of Contents

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1

PRE-INSTALLATION INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

ICE MACHINE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

RCE1001 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE INSTALLER: Environmental Limitations . . . . . . . . . . . . . . . . . . . Page 5

FOR THE INSTALLER: Machine & Bin Assembly . . . . . . . . . . . . . . . . . . . Page 6

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . Page 8

FOR THE INSTALLER: Coupling Instructions . . . . . . . . . . . . . . . . . . . . . Page 9

FOR THE ELECTRICIAN: Electrical Connections . . . . . . . . . . . . . . . . . . . Page 10

FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . . . . . Page 11

INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

SERVICE SPECIFICATIONS: CME865R . . . . . . . . . . . . . . . . . . . . . . . . Page 18

SERVICE SPECIFICATIONS: CME1002R . . . . . . . . . . . . . . . . . . . . . . . Page 19

CLEANING & SANITIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

FREEZING CYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

HARVEST CYCLE - HOT GAS BYPASS . . . . . . . . . . . . . . . . . . . . . . . . Page 23

SERVICE DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

SERVICE DIAGNOSIS: Ice Level Control Circuit . . . . . . . . . . . . . . . . . . . . Page 26

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27

REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

LIQUID CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.

This manual was printed on recycled paper.
This manual contains information on maintenance
and service. Keep it for future reference.

It marks a potential hazard.

September, 1994

Page 1

CME865R & CME1002R

PRE-INSTA LLATI ON INFO RMA TIO N

These two models are modular ice cube mach ine s
that are designe d to be connect ed to a remote
condenser.

The remote condenser co il must be of adequate
size and must NOT have been used with a
mineral oil refrige rat ion syst em. Specific Scotsma n
remote condensers are recommended.

A sta ckin g kit (KSCMS ) is require d for stackin g
these ice machin es. It intercon nects the sonor bin
ice level contro ls. A CME 865 or CME1002 may
only be stacked onto mod els CME8 65 , CME1 002,
MCM860, MCM1062 or CMS1002.

These models will fit any 30" wide Scotsman bin,
such as the BH55 0 or HTB5 55 , with out a bin top.
Other bins require a bin top.

Note: The sonar transducer, located in the base of
the machine, must NOT be covered by inst alla tion
material (such as a non-Scotsman bin to p). The
transducer mus t ha ve cle ar acc ess to the ice to be
able to sense the ice level. See page 5 for loca tio n.

Model Number Dimensions

W" x D" x H"
CME865RE-3 2A 30 x 24 x 27 208-230/ 60 /1 16.5 20 336 oz.
CME865RE-6A 30 x 24 x 27 230/50/1 - - 336 oz.
CME1002RE -32 A 30 x 24 x 27 208-230/ 60/1 20.5 20 336 oz.
CME1002RE -3A 30 x 24 x 27 208-230/60/3 14.3 15 336 oz.
CME1002RE -6A 30 x 24 x 27 230/50/1 - - 336 oz.

* This number is for rech arg ing purp os es on ly. - Note: Beginnin g Ju ne 1996, 48 ounce s of cha rge were
added to the ERC301, before that total charge was 288 oz.

Use Scotsman Remote Condenser

Basic Electrical Min Circuit

Ampacity

Max Fuse
Size

Refrigerant Charge*
(R-404A)

•• RCE1001 (single circuit) or ERC301 (single circu it).

Use precharged tubing kit

•• RTE25 (25’)

••RTE40 (40’ )

••RTE75 (75’ )

Air Temperatu re

(cabinet )
Minimum 50
Maximum 1000 F. 1200 F. +10% 1000 F

0

F. -200 F. -5% 400 F

Remote Condenser
Air Temperatu re

Voltage Water Temperature

.

.

June 1996

Page 2

ICE MACHINE SPECIFICATIONS

Always refer to the nameplate, located on the back
of the cabinet, for the:

••model number,

••serial number,

••basic electrical requirements,

••

minimum circuit ampacity,

••maximum fuse size,

••and refrigerant charge.

A serial number plate with the model number,
serial number and refrigerant charge is located
behind the front panel, below the control box.

The unit comes from the factory with the correct
refrigerant charge contained in the receiver. The
refrigerant charge information is for recharging,
should that be necessary.

All utility connections and refrigerant line
connections are made at the back of the ice maker.

CME865R & CME1002R

Before beginning installation, be sure that all of the
components necessary for complete assembly of
the ice system are available, and are the correct
components with regard to model, voltage, and
finish.

September, 1994

Page 3

CME865R & CME1002R

ERC301 SPECIFICATIONS

23 13⁄16"

7

⁄8"

19

ERC Dimensions

ABFG

3

33

⁄8"10

3

⁄

"16

4

3

⁄

"11

4

5

⁄

"

8

December 1995

Page 4

CME865R & CME1002R

FOR THE INSTALLER: Environmental Limitations

Installation Limitations

The ice making portion of this ice system is
designed to be installed indoors, in a controlled
environment.

Minimum Maximum

0

Air Temp 50
Water Temp 40
Water Pressure 20 PSI 80 PSI
Voltage 197 253
Operating the ice 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.

F. 1000F.

0

F. 1000F.

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. These general recommendations
should help keep the ice maker clean:

1. Filter the water used to produce ice. 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

Some space on the sides, the back and the top
should be allowed for service and utility
connections.

Scotsman reserves the right to make design
changes and/or improvements at any time.

Specifications and design are subject to change
without notice.

September, 1994

Page 5

CME865R & CME1002R

FOR THE INSTALLER: Machine & Bin Assembly

Overview:

This ice system consists of 4 major assemblies:

1. The ice st orage bi n.

2. The ice maker itself.

3. The interc on necting refrigerant l i n es.

4. The remote co ndenser.
Additionally, there will be interconnecting wires

between the ice mak er and the c o nd enser. The
Scots m an re mote condenser is po wered from the
ice maker. The condenser must be located above
the ice maker, usually on the roof.

On the back of the cabinet is the following notice:

REMOTE CONDENSER NO TICE

This unit has been designed for use with
Underwriter’s Laboratories Inc. listed forced air
cooled condensers, Scotsman models
RCE100 1- 32A or R CE1002- 32 A or ERC3 01. The
ice maker, cond enser and connect ing line se ts ar e
factory charged with the correct amount of
refrigerant and therefore require no charging in the
field unless the system should be opened for
service repairs.

If other forced air cooled condensers are being
considered for use with this ice maker, prior
approval fr om Sc o tsman is ne ce s sary to insur e
proper system operation.

Any alternate forced air cooled con denser being
considered must be listed with Underwriters
Laboratories, Inc. Certified with C.S.A. and have a
minimum design pressure of 500 P.S.I.G.

CAUTION
A suitable ground path must be provided between

the remote condenser cabinet and the ice maker
cabinet if the condenser fan is powered from th e
ice maker.

IMPORTANT
In order to prevent compressor damage due to

refrigerant migration, and to insure acceptable
start up , a c rankca se heater ha s been insta l l ed on
the compressor. This heater is wired to operate at
all times. Upon initial start up and any time the unit
power supply is interrupted for more than one
hour, the machine should not be star ted for at
least 4 hours after the power supply has been
reconnected to the machine.

Storag e Bin:

1. Measure the location of the ice machine floor
drain relative to the installed location of the bin.
Route all drain lines so that when the machine i s
install ed in its normal pos ition, the drain tubes
terminate just above the floor drain.

2. Using corner posts from th e bin’s carton as a
cushion, lay the bin on its back.

3. Install the legs into the leg sock ets .

4. Move bin back to an upright position.

5. Remo ve all material tha t i s pa cked i ns ide the bin .

Ice Maker :

1. Arrange for proper electric, water and drain.
See instructio ns for the plumbe r and for the

electrician.

2. Position the ice storage bin in the selected
location which should have a minimum room
temperature of 50-degrees F. and maximum room
temperature of 100 de gr ees F.

3. Inspect the bin top mounting gasket which
should be flat, with no wrinkles, to provide a good
water se al when the cuber is installed on top of the
bin.

4. Install the modular cuber on top of the bin using
care to be sure a good seal is made between the
two cabinets, use of a mechanical lift is
recomm e nded. Align the holes i n th e bo tt om back
of the cabinet to mate with the two mounting straps
on the top rear of th e bin.

5. Use bo l ts an d s t r a ps found in the hard ware
package to secure the ice machine to the ice
stor age bin.

When alignment and leveling are completed,
tighten the bolts to secure the mounting straps.

Remote Condenser:

A
capacity MUST be used. Because of the possibility
of mineral oil contamination,
that had bee n connect ed to R -12, R-502 or R - 22
units

SYSTEM

warranty.

condenser coil designed for the machine’s

new

coils and line sets

MAY NOT BE CONNECTED T O THIS

. Doing so voids the refrigeration system

January 1998

Page 6

FOR THE PLUMBER

WATER TREATMENT

DEVICE

BACK VIEW OF MACHINE ON BIN:

INLET WATER AND DRAIN

CONNECTIONS

CME865R & CME1002R

Water Supply

The recommended water supply line is a 3/8-inch
O.D. tubing with a minimum operating pressure of
20 PSIG and a maximum of 80 PSIG.

Connect to cold water supply line with standard
plumbing fittings, with shut off valve installed in an
accessible place between the water supply and
the cuber. In some cases a plumber will be
required.

Drain Connections:

All drains are gravity type and must have a
minimum of 1/4 inch per foot fall on horizontal
runs.

VENT FOR ICE

MACHINE DRAIN

3

⁄4" FPT DRAIN

FITTING

The drains to be installed must conform with the
local plumbing codes. Use only 3/4" rigid tubing.
The ice machine’s drain must be separate from the
bin’s drain. Both use 3/4" FPT fittings. Insulation of
the bin drain is recommended.

Install a vertical open vent on the drain line(s) high
point to ensure proper draining. The ideal drain
receptacle is a trapped and vented floor drain.

CONFORM TO ALL LOCAL CODES.

3

⁄8" MALE FLARE WATER INLET

3

BIN DRAIN
OUT THE BOTTOM

OF THE BIN

VENT FOR BIN

FLOOR DRAIN

⁄4" FPT

DRAIN

SHUT OFF

VALVE

September, 1994

Page 7

CME865R & CME1002R

FOR THE INSTALLER: Remote Condenser

Locate the condenser as near as possible to the
interior location of the ice maker.

Locati o n of the condens e r is l im i te d by the
specific length of pre-charged refrigerant tubing
supplied for the application. The pre-charged
tubing co nnects th e i ce m aker to the remote
condenser. The condenser must be above the ice
maker .

Select the best available location, protecting the
conde nser from extreme s of dirt, dust, and sun.

Meet all applicable building codes.
Roof Attachment

Install and attach the remote condenser unit to
the roof of the building, using the methods and
practices of construction that conform to the local
building codes, including having a roofing
contractor secure the condenser to the roof.

Pre-charged Line Routing

Do not co nn ect pre-c ha r ge d tubing un til al l
routing and forming of the tubing is complete.
See the coupling instructions for connect ing
instructions.

:

CAUTION

SCOTSMAN REMOTE

CONDENSER

PRE-CHARGED

REFRIGERANT

LINE SET

1. Each set of precharged refrigerant lines
consist s of a 3/8 inch dia m eter liquid line, and a
1/2 inc h di a m eter discharge line. Both ends of
each line have quick connect couplings, one end
has access valves: that end goes to the i ce maker.

Note: The openings in the building ceiling or wall,
listed in the next step, are the minimum sizes
recommended for passing the refrigerant lines
through.

2. Have the roofing contractor cut a minimum hole
for th e r ef rigeran t l ines of 1.75 " . Check loc al
codes, a separ ate hole may be required for the
electrical power to the condenser.

CAUTION

DO NOT KINK OR CRIMP REFRIGERANT
TUBING WHEN INST ALLING IT.

3. Route the refrigerant lines through the roof
opening.

Follow straight line routing whenever possib le .

Any excess tubing MU ST be retained within the
building.

4. Spiral any excess length of pre charged tubing
inside the building. Use a horizontal spiral ( a s
illustrated) to avo id any traps in the lines.

Note: Actual spiral need not be as ti gh t as s h o w n.

5. Have the roofing contractor seal the holes in the
roof per local codes.

Note: Only a holding charge is in the precharged
line set.

January 1998

Page 8

CME865R & CME1002R

FOR THE INSTALLER: Coupling Instructions

CAUTION

The couplings on the sets of precharged lines are
self sealing when installed properly. Carefully
follow the instructions:

1. Remove the protector caps and plugs. Wipe the
seats and threaded surfaces with a clean cloth to
be certain that no foreign matter remains on them.

2. Lubricate the inside of the couplings, especially
the O-Rings with refrigerant oil.

•• The 3/8 inch liquid line (schrader valve end)

goes to the remote condenser fitting marked
“liquid line”.

•• The other end of the liquid line goes to the ice

maker fitting marked “liquid line.”

•• The 1/2 inch discharge line (schrader valve

end) goes to the remote condenser fitting
marked “discharge line”.

•• The other end of the discharge line goes to the

ice maker fitting marked “discharge line”.

3. Begin tightening the couplings together by
hand, then using two wrenches (it is important that
ONLY the nut on the precharged lines be turned,
the other parts of the couplings must NOT be
allowed to turn or the process will tear out the
diaphragms and they will be loose in the
refrigeration system) tighten the coupling until it
bottoms out or a definite increase in resistance is
felt.

ONLY TURN NUT ON

TUBING KIT, HOLD

TUBING STATIONARY

USE TWO

WRENCHES

4. Using a marker or pen, mark a line lengthwise
from the coupling union nut to the bulkhead. Then
tighten the coupling and additional 1/4 turn. As the
nut turns, the line will show when 1/4 turn is made.

5. After all connections are made, and after the
king valve has been opened, check the couplings
for leaks.

September, 1994

Page 9

CME865R & CME1002R

FOR THE ELECTRICIAN: Electrical Connections

See the NAMEPLATE for current requirements to
determine wire size to be used for electrical
hookup. The cuber requires a solid chassis to
chassis earth ground wire. See Wiring Diagram.

Be certain the cuber is connected to its own
electrical circuit and individually fused. Voltage
variation should not exceed ten percent of the
nameplate rating, even under starting conditions.
Low voltages can cause erratic operation and may
be responsible for serious damage to the ice
maker.

Electrical connections are made at the rear of the
ice maker, inside the junction box.

CAUTION

Do

not switch the ice maker on at this time, make

certain the master and compressor switches are
OFF when power is connected to the ice maker.
Power must be connected to the ice maker long
enough in advance of start up to allow the
crankcase heater to warm the compressor,
usually about 12 hours.

Scotsman Condenser:

Separate electrical connections are made from the
ice maker to the condenser, as there is line power
interconnecting the ice maker to the condenser.

All external wiring should conform to the
national, state and local electrical code
requirements. Usually an electrical permit and
services of a licensed electrician will be
required.

REMOTE CONDENSER ELECTRICAL

CONNECTION (SCOTSMAN CONDENSER)

TERMINAL STRIPS

POWER SUPPLY TO

REMOTE SCOTSMAN

CONDENSER

POWER SUPPLY

TO ICE MAKER

September, 1994

Page 10

FOR THE INSTALLER: Final Check List

1. Is the ice maker cabinet in a room where
ambient temperatures are within the minimum and
maximum temperatures specified?

2. Is there clearance at both sides of the cabinet
and at the back and top for service and utility
connections?

3. Has water supply pressure been checked to
insure a minimum of 20 PSIG and a maximum of
80 PSIG operating pressure?

4. Is the cabinet level?

5. Check that any shipping material has been
removed from inside the cabinet.

6. Have all electrical and piping connections been
made?

7. Are the On/Off/Wash and Compressor switches
set to the OFF position?

8. Has power been connected to the ice maker?

CME865R & CME1002R

9. Is the water supply line shut off valve installed?

10. Check all refrigerant lines and conduit lines, to
guard against vibration or rubbing and possible
failure.

11. Have the bin and cabinet been wiped clean
and sanitized?

12. Has the Field Quality Audit form been properly
filled out? Check for correct model and serial
numbers from Serial nameplate, then mail the
completed form to the SCOTSMAN factory.

13. Has the owner been given the name and
telephone number of the authorized SCOTSMAN
Service Agency serving him?

September, 1994

Page 11

ON/WASH/OFF

SWITCH

CME865R & CME1002R

INITIAL STA RT UP

Remote Condenser:

1. Check that all co nn ect ion s ha ve be en made .

Ice Maker:

1. Remove front panel by pulling out to unsnap .

2. Remove two screws and the cont rol box cove r.

3. Remove the evaporator cover.

4. Remove the left side servic e panel.

5. Check that the ON/W A SH/ OFF roc ker switch
and the Compressor ON-O FF toggle switch are in
the OFF position, on the control box.

6. Locate and open the king (service) valve on the
receiver. Check that the crank cas e heat er has
been on long enough to warm the compressor
dome (a bout 4 hours).

7. OPEN the water supply line shut off valve.

8. Inside the control box is the shaft of the timer
and the switch assembly. Rotate the shaft of the
timer and switch assembly clockwise to where the
actuator arm on the micro switch drops of f outer
cam into cam slot. See T ime r Cam Posit ion s.

9. Move the ON/WA SH/ OFF rock er switc h to the
ON position.

TIMER CAM POSITIONS

ACTUATOR

CAM &
SHAFT

MICRO

SWITCH

EVAPORA TOR

COVER

“KING”
VALVE

10. Observe water fill cyc le: The water p ump will
be operating and the water inlet solenoid valve will
OPEN. Incomin g water flo ws from th e valve
through the tubing , the res ervo ir f ills an d excess
water drains out the machin e dra in.

At the end of the harvest cycle, the water inlet
solenoid valve will close and the water fill cycle is
complete. If the reservoir is not full, turn the shaft
of the timer clockwise into a new harve st cyc le;
this opens the water valve again.

The water pump pumps water up to the water
distributor at the top of each evaporator plate,
where water is uniformly d isp ensed , casca de s
down both sides of each evaporator plate and
drains back into the reservoir for recirculation.

11. Check that the water cascades down over the
cube molds and into th e reservoir. Note: some
spray is normal when the mach ine is new.

FREEZE

PORTION

HARVEST

PORTION

12. When the reservoir is full, move the
compressor ON-OFF switch, to the ON position.

13. Observe the fir s t fre ezin g cyc le: Feel th e met al
parts of the evaporator plate; they should feel cold,
and very shortly ice will begin to form. The tubing
will become frosted at the top of the evaporat or
plate. Freezin g time will be longer than average for
the first cycle. Ave rage complete cyc le t ime is
about 13 - 16 minutes.

April 1995

Page 12

INITIAL START UP

1 1⁄4"

CME865R & CME1002R

14. Check CUBE SIZE
The dimensions of the cubes are fixed by the size

and shape of the molds on the evaporator plate,
except that the thickness of the cube MAY need to
be adjusted at start up. There is only one size of
cube that is correct; adjusting the cube size control
to that size of cube will allow the ice maker to
produce ice at its most efficient size. The correct
size cubes will be fully formed at the edges; will
harvest off of the evaporators beginning with
individual cubes at the top of the evaporator, then
vertical strips for the balance; and will appear
similar to the illustration for “Correct Size Cube”.

Adjust for the correct size if needed:

To produce SMALLER sized ice cubes:
Locate cube size control knob, in the front of the

control box. Rotate this knob one eighth of a turn
counter clockwise. Observe size of the ice cubes
in the next ice cube harvest and adjust again if
needed, until the correct ice cube is achieved.

To produce LARGER ice cubes:
Locate cube size control on the front of the control

box. Rotate the knob one eighth of a turn
clockwise. Observe size of ice cubes in the next
cube harvest and adjust again until correct the ice
cube size is achieved.

CUBES (ACTUAL SIZE)

TOO

THICK

CORRECT

SIZE

CUBE

Note: Optimum performance will be achieved when

the ice machine is adjusted to produce this size and

shape of cube. The typical batch weight at this

1

⁄4"

1

setting is between 8.25 and 9 pounds.

15. Check harvest time. The machine must harvest
all of the cubes before returning to a freeze cycle.

Increase the harvest time if there is less than 15
seconds of harvest time after the last cube has
fallen into the bin.

Decrease the harvest time if there is much more
than 15 seconds of harvest time after the last cube
has fallen into the bin. Note: Harvest time is
dependent upon the water and air temperatures at
the ice machine. Do not adjust harvest time too
short, as this will cause a freeze up.

See the next page for detailed harvest time
adjustment instructions.

16. Check ICE BIN LEVEL CONTROL
The amount of ice maintained in the bin is

adjustable. The normal setting is “full”. If desired,
the machine may be adjusted to shut off the
machine when the bin is only partially full.

1. Open the bin door and locate on the bottom of
the ice machine, the ice level sensor. It’s in a

TOO

THIN

socket about 2" in diameter and located left of the
evaporator plates.

2. When the machine is running, wait until near the
end of a “harvest” cycle.

3. Hold a flat object about the size of this service
manual over the ice level sensor socket.

4. The ice machine should turn off at the end of the
harvest cycle.

5. Slowly lower the flat object straight down.

6. The ice machine will start again at the point
where it will maintain the ice level.

17. Replace all panels.

September, 1994

Page 13

Disconnect electrical
power before beginning.

CME865R & CME1002R

ADJUSTMENTS

TIMER CAM POSITIONS

ACTUATOR

CAM &
SHAFT

MICRO

SWITCH

Adjustment Of The Timer & Switch Assembly

One complete revolution of the cam on the timer
represents eight minutes. If left as factory set, four
and one-half minutes comprise the freezing cycle
portion during cam rotation, and the final three and
one-half minutes is the defrost/harvest cycle.
Rotating the shaft of the timer cam clockwise will
put the ice machine in the freeze or harvest cycle.

To adjust the timer & switch assembly:

FREEZE

PORTION

TIMER ADJUSTMENT

MICRO SWITCH

HARVEST

PORTION

SHAFT OF

CAM

1. Remove front panel.

2. Remove control box cover.
A. To start the HARVEST CYCLE: Slowly rotate

the shaft of the timer and switch assembly
clockwise until the actuator arm on the micro
switch begins the harvest cycle.

B. To start the FREEZING CYCLE: Slowly rotate
the shaft of the timer and switch assembly
clockwise, until the actuator arm on the micro
switch starts the freezing cycle.

C. To adjust the length of the harvest cycle:

1. Loosen the adjustment screw on the cam, and
rotate the shaft of the cam to move the top part of
the assembly. More of a gap between the high and
low portions will yield more harvest time.

2. Tighten the set screw.

3. Replace the control box cover and front panel.
It. is important that the length of the harvest cycle

allow enough time for all the ice cubes to fall from
the evaporator. Too short of a time will cause the
evaporator to freeze up and stop harvesting ice.
Too much time wastes ice making capacity, energy
and water. Adjustment of the harvest cycle may
require an adjustment of the cube size control.

SET SCREW

Adjust Bin Ice Level

1. Locate ice level control switch.

2. Move switch to the desired position.

3. To test, wait until the ice machine is near the
end of a “harvest” cycle, if there is ice in the bin
higher than the position the ice level control is set
for, the ice machine will turn OFF at the end of the
harvest cycle. If no ice in the bin, test again as
described under, “To Test The Ice Level Setting”.

September, 1994

Page 14

COMPONENT DESCRIPTION

CME865R & CME1002R

Compressor Contactor

The compressor contactor carries the compressor
line current. The contactor is wired so any control
in the pilot circuit, such as the bin control, and high
pressure controls, etc., will cause the contactor
holding coil to be de energized, when the control
contact OPENS, thereby breaking the circuit to the
compressor.

Cube Size Control

This reverse acting (closes on temperature fall)
thermostat determines how long the freezing cycle
will be. The cube size control closes its contacts
when the evaporator cools to the set temperature,
starting the timer. A variation in heat load (either
ambient air or incoming water temperature) will
affect the efficiency of the refrigeration system, and
that will vary the length of time it takes the
evaporators to cool to the temperature at which the
cube size control is set to close, which, in turn, will
affect the overall cycle time. See CUBE SIZE
ADJUSTMENT BEFORE attempting to adjust the
control.

Hot Gas Solenoid Valve

The hot gas solenoid valve opens only during the
harvest cycle. When it opens, it diverts the hot
discharge gases so that they flow directly into the
evaporator plates, by-passing the condenser and
thermostatic expansion valve. The hot gases warm
the evaporators, releasing the ice cubes from the
ice cube molds. The hot gas solenoid valve is
installed in a branch of the discharge line from the
compressor, and when the timer switches the ice
machine into the harvest cycle, the energized
solenoid coil lifts the valve stem within the valve
body, allowing the hot discharge gas to be diverted
to the evaporators.

High Temperature Cut Out

This temperature sensor is located next to the hot
gas valve, on the outlet side.

During normal operation, it does not affect the ice
machine, but it will shut the machine off if the hot
gas line overheats. It is an automatic reset.

Relay

The multi-function, three pole, double throw, relay
plugs into a socket on the printed circuit board in
the control box. The relay functions in part to
by-pass the bin control during the harvest and
freeze cycles, preventing the ice maker from
shutting off in the middle of a cycle. The bypass
action allows only complete freeze and harvest
cycles; the only time that the ice maker can shut
off on bin control is as the end of the harvest cycle.

Timer - Timer & Switch Assembly

The timer begins to turn when activated by the
cube size control. The outer surface, or large
diameter lobe of the timer cam, determines the
length of time for finish freezing of the ice cubes,
while the inner surface, or small diameter lobe,
determines length of the harvest cycle. The
single-pole, double throw micro switch on the timer
controls the power to the plug in relay coil, making
it either the freezing or harvest cycle. The micro
switch is actuated by a cam assembly directly
connected to the timer motor. The timer cam can
be adjusted to vary the defrost time, as required.
One complete rotation of the cam will take eight
minutes. Harvest is preset at 2 and a quarter
minutes.

September, 1994

Page 15

CME865R & CME1002R

COMPONENT DESCRIPTION

Ice Level Control

This electronic control uses sound waves to
measure the distance between the bottom of the
ice machine and the top of the ice in the bin. It is
designed to control the machines ice production to
maintain that distance.

The control is adjustable so that the ice machine
will maintain a certain height of ice. It will not fill
any closer to the ice machine than 8", and will not
work if the distance to the bottom of the bin is
greater than 8 feet.

Because it uses sound waves, a slight “ticking”
sound can be heard coming from the bottom of the
machine.

ICE LEVEL

SELECTOR

SWITCH

ON/OFF/WASH SWITCH

THE USER CAN

SELECT THE

AMOUNT OF ICE

TO BE

MAINTAINED IN

THE BIN.

FULL

September, 1994

Page 16

PARTIAL

COMPONENT DESCRIPTION

WATER PUMP

CME865R & CME1002R

Electric Water Inlet Valve

The water inlet solenoid valve fills the reservoir
assembly with water. Excess water overflows out
the overflow standpipe located at the back of the
reservoir. This action fills and rinses the reservoir
during each harvest cycle. The flow rate is .75
g.p.m.

Water Distribution System

The water distribution system evenly supplies
water to all cells of the evaporator plates. The
water pump pumps water from the reservoir up the
vertical tygon tube to the tee. From there water is
channeled through the water manifold to the water
distributors, above each evaporator plate, and
from six holes within each distributor, water flows
to the cells of each side of the evaporator plates.
Gravity flow returns the unfrozen excess portion of
water to the reservoir for recirculation.

Reservoir

The reservoir, located below the evaporators,
stores the inlet water charge, and collects the
water that flows over the evaporator plates.

High Pressure Safety Control

This is a manual reset control that shuts down the
ice maker, should the discharge pressure ever
reach 450 PSIG.

WATER

DISTRIBUTION

SYSTEM

EVAPORATOR

RESERVOIR

HIGH PRESSURE

CUT OUT

ELECTRIC WATER VALVE

September, 1994

Page 17

CME865R & CME1002R

SERVICE SPECIFICATIONS: CME865R

The following numbers may be used as a
guideline. There will be some variation from unit to
unit. Numbers = (Condenser/Cabinet/Water).

0/70/55 90/90/70 120/110/100
Typical Cycle Time 14 - 15 minutes 15 - 16 minutes 26 - 27 minutes
Harvest Time (2

2

⁄3 min. standard) 3 1⁄4 minutes needed

2 minutes 2 minutes

Typical Freeze Cycle Low Side
Pressure (end of cycle)

Typical Freeze Cycle Discharge
Pressure (end of cycle)

Typical Harvest Cycle Low Side
Pressure (peak)

Typical Harvest Cycle Discharge
Pressure (min)

Typical Total Amps

••5 minutes into freeze: 8.4

••End of harvest: 11.8

Refrigerant Charge

••288 oz of R-404A

High Pressure Cut Out

••450

Typical Harvest Ice Weight

•• 8.2 - 8.5 lb.

26 PSIG 28 PSIG 35 PSIG

210 PSIG 235 PSIG 330 PSIG

75 PSIG 100 PSIG 160 PSIG

150 PSIG 200 PSIG 292 PSIG

Pump Down Pressure Switch

••Closes at 35 PSIG

••Opens at 15 PSIG

Cube Size Control

••

Cut In adjustable between 12.5oF. and 24oF.

September, 1994

Page 18

CME865R & CME1002R

SERVICE SPECIFICATIONS: CME1002R

The following numbers may be used as a
guideline. There will be some variation from unit to
unit. Numbers = (Condenser/Cabinet/Water).

0/70/55 90/90/70 120/110/100
Typical Cycle Time 13 - 14 minutes 14 - 15 minutes 25 - 26 minutes
Harvest Time (2

2

⁄3 min. standard) 3 1⁄4 minutes needed

2 minutes 2 minutes

Typical Freeze Cycle Low Side
Pressure (end of cycle)

Typical Freeze Cycle Discharge
Pressure (end of cycle)

Typical Harvest Cycle Low Side
Pressure (peak)

Typical Harvest Cycle Discharge
Pressure (min)

Typical Total Amps

••5 minutes into freeze: 9.9

••End of harvest: 13.6

Refrigerant Charge

••288 oz of R-404A

High Pressure Cut Out

••450

Typical Harvest Ice Weight

•• 8.2 - 8.5 lb.

25 PSIG 24 PSIG 33 PSIG

210 PSIG 240 PSIG 350 PSIG

84 PSIG 100 PSIG 150 PSIG

170 PSIG 190 PSIG 270 PSIG

Pump Down Pressure Switch

••Closes at 35 PSIG

••Opens at 15 PSIG

Cube Size Control

••

Cut In adjustable between 12.5oF. and 24oF.

September, 1994

Page 19

CME865R & CME1002R

CLEANING & SANITIZING

A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In
order to receive the best return for that investment, it MUST receive periodic maintenance.

Maintenance and Cleaning should be scheduled at a minimum of twice per year.

CLEANING: ICE MAKER

1. Remove front panel.

2. Switch the Wash/Off/Ice switch to OFF.

3. Remove the front liner.

4. Remove and discard all ice from the storage bin.

5. Locate the reservoir drain cap, remove the cap
and drain the reservoir. Replace the drain cap. If
the reservoir doesn’t drain completely, disconnect
the pump hose attached to the water distributors
and place the end of the hose in a bucket. Switch
the Wash/Off/Ice switch to Wash, and allow the
pump to discharge the rest of the water. Reattach
the hose to the water distributors.

6. Mix 8 ounces of Scotsman Ice Machine Cleaner
with 1 gallon of warm (95
pour into the reservoir until full.

0

F. - 1150F.) water and

Scotsman Ice
Machine Cleaner
contains acids.
These compounds
may cause burns.

If swallowed, DO NOT
induce vomiting. Give
large amounts of water
or milk. Call Physician
immediately. In case of
external contact, flush
with water.

KEEP OUT OF THE
REACH OF CHILDREN.

7. Switch the Wash/Off/Ice switch to “wash”. Let
the unit operate for 30 minutes, then switch the
unit off.

12. Switch the Wash/Off/Ice switch back on.

13. Replace the front panel

14. Check the next batch of cubes to make sure all
of the acid taste is gone.

CAUTION

DO NOT use ice produced from the cleaning
solution. Be sure none remains in the bin.

15. Remove and discard all ice from the storage
bin, pour hot water into the storage bin to melt the
cubes and also clean out the bin drain.

16. The unit is now ready for continued automatic
operation.

8. Drain the reservoir again (repeat step 5).

9. Switch the machine to “wash” and continue to
add fresh water to flush residual cleaner from the
system. Switch the Wash/Off/Ice switch off.

10. Sanitize the ice maker and bin, see “Sanitize
Water System”.

11. Replace the front liner.

September, 1994

Page 20

CLEANING

Disconnect electrical
power before beginning.

CME865R & CME1002R

SANITIZE WATER SYSTEM

1. Remove and discard all ice from the bin.

2. Remove front panel.

3. Drain the reservoir

4. Prepare 2 gallons of an approved sanitizer
solution in accordance with the instructions on the
package.

5. Pour 1 gallon of the sanitizer into the ice maker
reservoir.

6. Move the main switch to “Wash”, and allow the
solution to circulate for a MINIMUM of 5 minutes.

7. Move the main switch to “Off”.

8. Pull out the drain plug and drain the reservoir.

9. Using a clean sponge and the remainder of the
sanitizer solution, wipe the interior of the
evaporator cover and the inside of the storage bin,
taking care to wipe all surfaces that are normally in
contact with ice.

10. Replace the evaporator cover. Replace the
front panel.

11. Move the master switch to ON.

SCOTSMAN REMOTE CONDENSER

1. Disconnect electrical power at the ice maker.

2. Wipe off any surface dust from the intake side of
the condenser.

3. Vacuum the coil, or clean with coil cleaner.

4. The coil is clean when light can be seen through
the fins.

5. Reconnect electrical power.

SANITIZE ICE STORAGE BIN

This procedure is to be done monthly

1. Remove and discard all ice from the bin.

2. Switch the ice maker off.

2. Prepare 2 gallons of an approved sanitizer
solution in accordance with the instructions on the
package.

3. Using a clean sponge wipe the inside of the
storage bin and door, taking care to
wipe all surfaces.

ON/OFF/WASH

SWITCH

4. Rinse the interior of the storage bin
using clean water and the sponge used
in step 3.

5. Switch the ice machine back on.

RESERVOIR

DRAIN

September, 1994

Page 21

EVAPORATORS

CME865R & CME1002R

FREEZING CYCLE OPERATION

Water from the sump assembly is pumped to the
water distributor system at the top of each
evaporator plate. From the water distributor the
water cascades by gravity over all cells of the plate
and to the sump assembly below.

At the beginning of the freezing cycle the water
pump, fan motor and compressor have power. The
water pump operates continuously, through both
the freezing cycle and the harvest cycle.

During the freezing cycle, the hot gas solenoid
valve and the water inlet solenoid valve are
CLOSED. When the ice cubes are partially
formed, the cube size control will CLOSE. This will
complete an electrical circuit to the timer motor.
The timer will keep the ice maker operating in the
freezing cycle for a selected length of time. This
will give the ice cubes time to fully form. After that
selected length of time, the timer will switch the ice
maker into the harvest cycle, through the contacts
of the timer assembly micro switch.

Low Temperature Freeze:

When the outside air temperature is
low, the Head Pressure Regulator will
close off the liquid line to the receiver,
causing liquid refrigerant to back up
into the condenser until the head
pressure builds up to 220 PSIG. While
this is occurring, the head pressure
regulator passes discharge gas into
the receiver to keep the refrigerant
flowing.

DISCHARGE LINE

REFRIGERATION SYSTEM SCHEMATIC

September, 1994

Page 22

HARVEST CYCLE - HOT GAS BYPASS

CME865R & CME1002R

When the timer switches the ice maker into the
harvest cycle, high pressure, high temperature
refrigerant gas being discharged from the
compressor is diverted from the condenser
through the hot gas solenoid valve into each
evaporator plate. During this cycle, the refrigerant
bypasses the condenser. In the electrical circuit,
both the compressor and the water pump are
operating and the hot gas solenoid valve is
energized and OPEN and the water inlet solenoid
valve is OPEN.

FAN MOTOR

The finished ice cubes are released from the sides
of each evaporator plate by the warming effect of
the hot gas condensing in each evaporator plate
and the water cascading over the ice cubes. The
released ice cubes drop into the ice storage bin
below. At the end of the harvest cycle, the timer
cam will push the actuator arm to the micro switch
IN. If the ice level control is still CLOSED, a whole
new cycle will begin. If the ice level control is
OPEN, the ice maker will begin to shut OFF.

REFRIGERATION SYSTEM SCHEMATIC

September, 1994

Page 23

CME865R & CME1002R

SERVICE DIAGNOSIS

SYMPTOM POSSIBLE CAUSE PROBABLE CORRECTION
No ice, machine does not run 1. No electrical power 1. Restore power

2. Circuit breaker tripped or fuse
blown

3. High pressure control open. 3. Reset HPC, check fan motor

4. Bin level control holding
machine off

5. High temp. cut out open 5. Hot gas valve leaks thru,

6. Timer switch open 6. Replace timer

7. On/Off switch open 7. Check or replace switch.

8. Circuit board open 8. Replace circuit board.

No ice, compressor does not run,
rest of ice machine does.

No ice, no water over evaporators 1. Water pump does not pump 1. Check/replace water pump

No ice, everything runs 1. Too much heat load 1. Check for slow leak thru of

Low ice production 1. Too much heat load. 1. Check condenser air inlet and

1. Compressor on/off switch open 1. Check or replace switch

2. Open contactor coil 2. Replace contactor

3. Liquid line valve does not open 3. Check electrical connections to

4. Pump down pressure switch
does not close

5. Thermostatic Expansion valve
clogged or does not open.

2. No water in reservoir 2. Check/replace water inlet valve.

2. Low on refrigerant 2. Check pressures, if low

3. Suction pressure too high 3. Defective compressor - replace

2. Compressor inefficient. 2. Replace compressor

3. Non condensable gasses in
refrigeration system.

2. Reset breaker or replace fuse,
check for electrical fault.

for proper operation, and
condenser coil for dirt.

4. Check ice level control circuit.
See page 25.

replace hot gas valve

liquid line valve, check coil, check
valve operation

4. Defective switch, or liquid line
valve does not open, or low on
refrigerant; check/replace

5. Check/replace TXV.

water inlet valve.

find/repair leak. weigh in charge.

water temperatures.

3. Check head pressure, if very
high, and no other reason is
suspected, replace refrigerant
charge.

September, 1994

Page 24

CME865R & CME1002R

SERVICE DIAGNOSIS

SYMPTOM POSSIBLE CAUSE PROBABLE CORRECTION

Low ice production 3. High head pressure, a result of

a dirty condenser

4. Hot gas valve leaks thru 4. Replace hot gas valve

5. High air temp. for condenser. 5. If possible, reduce condenser

No ice falling in bin, unit frozen up 1. Cube size control will not close 1. Check temp. of suction line,

2. Timer motor open 2. Replace timer

3. Plug in relay contacts open 3. Replace relay

4. Not enough time during the
harvest cycle to drop all ice

5. Cube size wrong 5. Adjust cube size

6. Hot gas valve restricted. 6. Replace hot gas valve.

7. Not enough water to help
harvest.

8. Head pressure too low 8. Check pressure control valve.

Ice maker stuck in harvest cycle 1. Relay coil open 1. Replace relay

2. Timer stuck in harvest cycle 2. Check for power to timer

3. Timer micro switch N.O.
contacts will not close.

Ice is mal-formed 1. Shortage of water 1. Check for restriction of water

2. Evaporator water passages
restricted.

3. Cube size set wrong 3. Adjust cube size control

Water overflows from reservoir
into bin.

1. Restricted sump drain 1. Repair drain

2. Inlet water valve lets in too
much water

3. Clean condenser, check fan
motor

air inlet temperature.

cube size control will not close if
temp. too high. If temp. low
enough, replace cube size control

4. Adjust timer for more harvest
time

7. Check for restriction of water
supply.

Check for low refrigerant charge.

motor, if power replace timer, if
no power to timer motor, replace
relay.

3. Replace timer.

supply. Check for leak.

2. Clean ice maker.

2. Replace valve

September, 1994

Page 25

Electrical Shock Hazard

Can Cause Personal Injury.
Disconnect Power Before

Servicing.
Bin Thermostat Posts at Line

Voltage.

CME865R & CME1002R

SERVICE DIAGNOSIS: Ice Level Control Circuit

CONDITION

Ice Machine does not run, it has
power to it, the high pressure
control is closed, the on/off switch
is set to ON (the compressor will
not operate until the liquid line
valve opens, but the pump should
be working if there is no ice in the
bin).

Machine runs, makes ice,
switches on and off, but ice level
cannot be controlled.

DETERMINE CAUSE

A. Listen for a ticking sound from
transducer.

B. Open bin door and twist
transducer 1/4 turn and pull out.

DO NOT UNPLUG with power
connected. Examine the

transducer, the inside must be
clean and dry.

C. Check power to bin level

control board.

D. Disconnect electrical power
and test ice machine circuit by
attaching a jumper wire between
bin thermostat posts on circuit
board part no. 12-1912-01 (the
circuit board with the timer on it).
Reconnect power.

E. Transducer or ice level board
assembly defective.

Ice level switch may be defective. Replace ice level switch

PROBABLE CORRECTION

If no noise, go to C. If there is a
noise, check for a light on the
board. If there is a light on, check
relay contacts N.O. and COM.
The contacts should be CLOSED.
If closed, go to D. If not, replace
the board. If light is off, or prior
model, go to B.

If the inside of the transducer
(above screen) was wet, replace
it. Set bin level to FULL and aim
at an object about 1-3 feet away.
Machine should restart, if not go
to D.

Should be 12 volts from
transformer, if not replace
transformer. If there is power go
to D.

If machine does not start go back
to machine circuit. If machine
starts, disconnect electrical
power, remove jumper wire and
reconnect electrical power. Then
go to E.

Replace transducer. Set bin level
to FULL and aim at an object
about 1-3 feet away. Machine
should restart. If this does not
repair unit, replace the board.

PARTIAL VIEW

OF CIRCUIT

BOARD

12-1912-01

TIMER

PLUG - IN

RELAY

BIN THERMOSTAT

POSTS MENTIONED IN

“D” ABOVE

September, 1994

Page 26

REMOVAL OF TRANSDUCER

TRANSDUCER

SOCKET

REMOVAL AND REPLACEMENT

TRANSDUCER

CME865R & CME1002R

1. Disconnect electrical power BEFORE removing
transducer.

2. Open bin door and locate the transducer socket.

3. Twist inner portion of transducer counter­clockwise and push up gently.

4. Pull transducer down until plug connection is
accessible.

TRANSDUCER

LOCATION

5. Unplug transducer and remove from the

machine.

6. Reverse steps 1-5 to reassemble.

TRANSDUCER

PLUG

CONNECTION

September, 1994

Page 27

CME865R & CME1002R

REMOVAL AND REPLACEMENT

Disconnect electrical
power before

beginning.

Cube Size Control

To remove the cube size control:

1. Remove front panel.

Water Distributor Tubes And Manifold Tubes
To remove the water distributor tube and manifold

tube:

1. Pull out to unsnap catches and remove the front
panel.

2. Remove the evaporator cover.

3. Slide the water distributor tube to the front about
1/8-inch along the top of the evaporator plate, until
the water distributor tube can be unsnapped from
the flexible notch and lifted upward to the right
side.

4. Unsnap and disconnect water distributor tubes
from the water manifold section. To replace the
water distributor tubes and manifold tubes, reverse
the removal procedure. BE SURE the notches in
the water manifold tubes properly engage the
alignment keys in the tee. BE SURE the water
distributor tube is securely fastened
at the notch at both sides of the
evaporator plate. Check identical
attachment for the left water
distributor tube and notch; also, that
the distributor/manifold connections
at the top center of each evaporator
plate is snug against the top of the
plate.

2. Remove cover from control box.

3. Trace capillary tube, from the cube size control

to the refrigerant suction line.

4. Remove the coiled capillary tube bulb from the

tube well on the suction line.

5. Remove electrical leads from the cube size

control.

6. Remove screws and the cube size control. To

replace the cube size control, reverse the removal
procedure. Be certain that the bulb is re-insulated.

WATER

DISTRIBUTOR

TUBES

CUBE SIZE

CONTROL

September, 1994

Page 28

INLET WATER

VALVE

REMOVAL AND REPLACEMENT

CME865R & CME1002R

Disconnect electrical
power before

beginning.

Water Pump

1. Remove front panel.

2. Remove evaporator cover.

3. Unplug water pump electrical connection.

ELECTRICAL

CONNECTION

Inlet Water Solenoid Valve Assembly

To remove the inlet water solenoid valve assembly:

1. Shut OFF water supply to machine.

2. Loosen and remove outlet water line from the

inlet water solenoid valve assembly.

3. Remove screws and pull the water solenoid

valve out to gain access.

ELECTRICAL

CONNECTION

INLET WATER

SOLENOID

DISCHARGE

WATER

PUMP

REMOVAL OF THE WATER PUMP

HOSE

4. Remove thumb screw retaining pump to cross
brace.

5. Pull pump partially out of reservoir and remove
discharge hose.

6. Remove the pump from the ice maker.

7. Reverse to reassemble.

8. Replace all panels.

9. Reconnect electrical power.

OUTLET

PORT

REMOVAL OF INLET WATER SOLENOID VALVE

4. Pull electrical cord from solenoid coil terminals.

5. Remove inlet water fitting from the water

solenoid valve. To replace the inlet water valve
assembly, reverse the removal procedures.

September, 1994

Page 29

Access Valves

Note: There are no valve

cores in this valve.

CME865R & CME1002R

REMOVAL AND REPLACEMENT

Head Pressure Control Valve

1. Remove side service panel, and top panel if
possible.

2. Discharge and recover refrigerant from the
system.

3. Break off the process tube on the dome of the
head pressure control valve.

4. Cut out or unsweat the tubing connections to
the valve. Remove the valve.

5. Wrap the new valve in wet cloths or other
effective heat sink material, and sweat the tubing
connections to the valve.

6. Weigh the nameplate charge into the receiver.

7. Replace all panels.

8. Reconnect electrical power.

Hot Gas Valve or Liquid Line Valve

1. Remove the side service panel, and top panel if
possible.

2. Discharge and recover the refrigerant from the
system.

Thermostatic Expansion Valve

1. Remove the side service panel, and top panel if

possible..

2. Discharge and recover the refrigerant from the

system.

3. Locate the TXV sensing bulb on the suction line,

unwrap the insulation and remove the bulb from
the clamp.

4. Cut out or unsweat the old TXV from the tubing

connections.

5. Wrap the new TXV body in wet cloths or other

efficient heat sink material.

6. Re-attach the TXV bulb to the suction line in the

same place as the original. Be certain to
re-insulate the bulb.

7. Sweat in the new valve. Do not overheat.

8. Weigh the nameplate charge into the receiver.

9. Replace all panels removed for service.

10. Reconnect electrical power.

3. Remove the electrical connections from the coil
of the valve

4. Cut out or unsweat the valve at the tubing
connections, remove the valve from the ice maker.

5. Install the new valve, wrap it in wet cloths or
other efficient heat sink material.

6. Sweat the tubing connections to the valve.

7. Connect the electrical wires to the terminals of
the valve coil.

8. Weigh the nameplate charge into the receiver.

9. Replace all panels removed for service.

10. Reconnect electrical power.

Allen

Wrench

Torque Stem to

6-8 ft. lb.

Torque Stem Cap to

8-12 ft. lb.

Torque

Core Cap to

7-12 ft. lb.

September, 1994

Page 30

VAPOR VAPOR
TEMP. PRES. TEMP. PRESS.
(DEG F) (PSIG) DEG F) (PSIG)

-20 17 70 146

-18 18 72 150

-16 20 74 155

-14 21 76 161

-12 23 78 166

-10 24 80 171

-8 26 82 177

-6 28 84 182

-4 29 86 188

-2 31 88 194
0 33 90 200
2 35 92 206
4 37 94 212
6 39 96 219
8 41 98 225
10 43 100 232
12 46 102 239
14 48 104 246
16 50 106 253
18 53 108 260
20 55 110 268
22 58 112 275
24 60 114 283
26 63 116 291
28 66 118 299
30 69 120 307
32 72 122 316
34 75 124 324
36 78 126 333
38 81 128 342
40 85 130 351
42 88 132 360
44 91 134 370
46 95 136 379
48 99 138 389
50 102 140 399
52 106 142 409
54 110 144 420
56 114 146 430
58 118 148 441
60 123 150 452
62 127 152 464
64 132 154 475
66 136 156 487
68 141 158 499

Pressure-Temperature Chart for HP62

REFRIGERATION SERVICE

This ice machine uses R-404A refrigerant and polyolester oil. Do NOT
use mineral oil in this refrigeration system.

••R-404A is a "Near Azeotrope" so liquid charging is required: See the

next page.

••When the system is serviced, a special liquid line drier is required. It is

included with replacement compressors.

••HP62 is not compatible with mineral oil, so these ice machines use

Polyolester oil. Polyolester oil absorbs water very easily. When one of
these refrigeration systems is opened for service, it must be re-sealed
as soon as possible (15 minutes maximum).

••Special leak detection equipment is required to locate small refrigerant

leaks. Usually a leak detector capable of detecting a Halongenated
refrigerant or HFC-134A will work. Check with the leak detector
manufacturer if in doubt.

Access Valves: To use the access valves:

••Remove the cap from the stem, use a 3/16" allen wrench to check

that the valve is CLOSED. The remove the core cap.

••Close the valve and replace the caps when the job is finished.

The valve must be closed and the caps must be on or the valve
will leak.

General Information:

Work on the refrigeration system should only be done when it is certain
that the system needs repair.

••Refrain from checking refrigeration pressures without reason.

Visual inspection of the water system, observation of the ice
formation, amp draw, voltage, and other techniques will lead to proper
diagnosis.

••If gauges must be used, don’t always check the high side pressure. If

the condenser is clean and seems to be operating correctly, it most
likely is.

••If gauges must be used, use very short hoses to minimize refrigerant

discharged into the air.

••Refrigerant should not be added except as a way to determine the

proper operation of the product. If the system was low on refrigerant,
there is a leak, and it must be found and repaired.

••This system has a critical charge, it must be recharged with the

correct amount of refrigerant as listed on the nameplate of the ice
machine, or performance will suffer.

••Anytime the refrigeration system has been opened, the dryer should

be replaced. Note: Only a HFC type dryer can be used.

••When brazing the tubing connections to components such as the

TXV, the component must be protected by heat sink material.

Recover, reclaim or recycle refrigerant. The method chosen is up to
the service company. Any refrigerant placed into a Scotsman ice machine
must meet ARI spec 700-88. Reclaim programs are available through
most refrigerant wholesalers.

September, 1994

Page 31

CME865R & CME1002R

Access Valves

Note: There are no valve

cores in this valve.

CME865R & CME1002R

LIQUID CHARGING

Instructions for R-404A

In preparation for charging, the low side hose
should have a sight glass, and/or a restrictor
device (such as a "Charge Faster") installed in it
for metering liquid into the low side of the system.

The discharge hose should be connected to the
receiver’s "king" valve for faster recovery and
recharging.

1. After a thorough evacuation to at least 200
microns, shut off the manifold valves and switch
off the vacuum pump.

2. Place a drum of R-404A onto an electronic
scale.

3. Attach the charging hose to the drum.

4. Open the valve on the drum and purge the
charging hose.

5. Zero out the scale.

6. Shut the low side access valve at the ice
machine.

7. Open the discharge manifold valve full open.

8. Watch the scale, when the correct charge is
shown, shut the manifold valve.

Note: If all of the charge will not "go in" the
discharge side:

A. Shut the discharge access valve at the ice

machine.

B. Switch the machine on.
C. Open the low side access valve at the ice

machine.

D. Open the low side manifold valve and observe
the sight glass to be certain that only gas is flowing
into the system.

E. When the proper charge is indicated on the
scale, shut off the manifold valve(s).

9. Shut off the valve on the refrigerant drum.

10. Re-open the manifold valves until all liquid has
flowed out of the hoses.

11. Shut the low side access valve on the ice
machine.

Hose Connection Schematic for Liquid Charging

Allen

Wrench

Torque Stem to

6-8 ft. lb.

Torque Stem Cap to

8-12 ft. lb.

Torque

Core Cap to

7-12 ft. lb.

12. Remove hoses from ice machine and replace
all caps.

September, 1994

Page 32