Scotsman Single System RL Service Manual

TO THE OWNER OR USER:

Single System RL

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.

This Remote Low side unit is the freezer portion of
a commercial ice machine. It is designed to be
connected to the condensing section of a
refrigeration system, specifically a supermarket
R-404A system.

Table of Contents

FOR THE INSTALLER: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

FOR THE INSTALLER: Final Check List Initial Start Up . . . . . . . . . . . . . . . . . . Page 6

COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 8

COMPONENT DESCRIPTION: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . Page 16

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . Page 19

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 22

REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . Page 23

CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

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

This manual was printed on recycled paper. Keep
it for future reference.

Note the Warning symbol where it appears. It
marks a potential hazard.

January 1997

Page 1

Single System RL

FOR THE INSTALLER: Specifications

The unit is designed to fit a variety of Scotsman
storage bins. See sales literature for more
information.

Installation Limitations: The remote low side is
designed for indoor installations only. The machine
must also be in a controlled environment where
the air temperature does not fall below 500F., or
go above 1000F.

The water temperature must be between 400F.
and 1000F.

The electrical power supply must not drop below

-5% of the lowest nameplate voltage or go above
10% of the highest nameplate voltage.

SPECIFICATIONS:

Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of U.L., N.S.F., and C.U.L.

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 parts 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 designs are subject to change
without notice.

Model Cabinet Size System Refrigerant BTUH required Voltage Ice Type
FME1200RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Flaker
NME950RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Nugget
FM1202RL 21"w x 27"h x 24"d R-22 8,000 208-230 Flaker
NM952RL 21"w x 27"h x 24"d R-22 8,000 208-230 Nugget
FME1500RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Flaker
NME1250RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Nugget

January 1997

Page 2

FOR THE INSTALLER

Select the Location:

The unit can only be installed indoors
within the limitations described on
page 2.

The ice machine will have to be
connected to the building’s
refrigeration system, check to be
sure that the system has enough
extra capacity to handle a minimum
of additional 8,000 BTU’s per hour @
1100F. liquid line temperature
(assume a 00F. evaporator
temperature).

Storage Bin:

Using a mechanical lift, install the ice
machine onto the top of the storage
bin.

Fasten the ice machine to the bin
using (4) 5/15-18 2.5" cap screws.

Level the assembly by:
a. Turning the leg levelers in or out

on the standard legs.
b. Use shims under the heavy duty

legs of the KLP4.
Locate the Nameplate: The

nameplate is located on the back
panel of the machine, and contains
the electrical characteristics
particular to the unit being installed.

Refrigeration Installation:

The skills of a refrigeration technician
are required to connect the ice
machine to the buildings refrigeration
system.

Notes:

•Suction Line and Liquid Line

Stubs are at the back of the
cabinet.

Single System RL

TYPICAL INSTALLATION: ALLOW ROOM FOR SERVICE ACCESS

FME1200RL

BX87 BIN

EXTENSION

B90 STORAGE BIN

•1.5 ounces of the appropriate

refrigerant is in the system as a holding charge.

•Be sure there is enough BTU capacity.

•Be sure that the liquid connection is NOT in

series with another liquid line valve.

•Local Codes must be observed.

•A P-trap should be installed where there will be

more than 10’ of vertical rise in the suction line.

January 1997

Page 3

Single System RL

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

Electrical Connections:

Locate the nameplate for the current
requirements, and then determine the
wire size and type per the National
Electric Code. The machine requires a
solid chassis to earth ground wire.
Refer to the wiring diagram. The ice
machine should be connected to it’s
own electrical circuit, and be
individually fused.

Voltage, when the unit is under full
load, must remain within the limitations
listed on page 2.

LOW VOLTAGE CAN CAUSE
EQUIPMENT MALFUNCTION
AND/OR DAMAGE

All external wiring should conform to
the National, State, and local electrical
codes. Usually the services of a
licensed electrician will be required.

DETAIL OF

JUNCTION BOX

JUNCTION

BOX

POWER SUPPLY

January 1997

Page 4

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Single System RL

Water Supply:

The recommended water supply line is 3/8" O.D.
copper tubing, with a minimum operation pressure
of 20 PSIG, and a maximum of 80 PSIG. Connect
to cold water using the male flare connection at
the back of the machine. Install a shut off valve in
an accessible space between the ice maker and
the water supply.

SHUT OFF

VALVE

Drain System:

All drains are of the gravity type, and must have a
minimum of 1/4" fall per foot of horizontal run. The
drains must be installed to conform to local
plumbing codes. The use of a vent at the machine
and at the bin will allow the system to drain
properly. Use only rigid tubing for drains; insulation
of the bin drain is recommended.

3/8" MALE FLARE

3/4" FPT

VENT THIS DRAIN

WATER INLET

BIN DRAIN

FLOOR DRAIN

FIELD

SUPPLIED

WATER FILTER

January 1997

Page 5

Single System RL

FOR THE INSTALLER:

Final Check List

1. Is the unit installed where the air and water
temperatures are within and will remain within the
limitations for the unit?

2. Is there 6" clearance at the rear of the machine
for utility connections?

3. Has the water supply line be checked for
pressures between 20 and 80?

4. Has the unit been leveled?

5. Has the shipping material been removed from
inside the cabinet?

6. Have the electrical connections been made?

7. Have the drains been installed and checked for
leaks?

8. Has the refrigeration supply been installed and
checked for leaks?

9. Has the bin and cabinet been wiped clean or
sanitized?

10. Has the warranty registration card been
properly filled out and mailed to Scotsman?

11. Has the owner been given the service manual
and been instructed on how to maintain the ice
maker?

Initial Start Up

1. Remove the top and front panels.

2. Open the water valve, and observe that the two
float reservoirs fill up with water and shut off.

3. Switch on the electrical power.

4. Open the hand valve (in the liquid line).

5. Open the ball valve (in the suction line).

6. Switch on the master switch, and observe:
The liquid line valve opens
The gearmotor runs
Within a short time, that side of the machine

begins to make ice.
Water flows from the water reservoir, and the float

drops, letting in more water.

7. When operating, the sight glass should remain

full, and the low side pressure will be about:
RLE1202/952 - 25 PSIG + or - 2 PSIG
RLE1200/950 - 36 PSIG + or - 2 PSIG
RLE1500/1250 - 25 PSIG + or - 2 PSIG
Gearmotor amp draw should not exceed the

nameplate rating.

8. Check the system very carefully for any

refrigerant leaks, repair as needed.

13. Has the owner been given the name and
telephone number of the local Scotsman service
agency?

November 1999

Page 6

COMPONENT IDENTIFICATION

Single System RL

Liquid line valve

This valve operates to turn the ice making process
on and off.

When the ice level drops in the ice chute, the ice
level sensor will cause the circuit board to close
the liquid line relay, which energizes the liquid line
valve. The liquid line valve opens, and liquid
refrigerant flows to the thermostatic expansion
valve.

Thermostatic Expansion Valve

The metering device of the system, the valve
senses the temperature of the suction line and
varies the amount of liquid refrigerant that passes
through the valve into the evaporator, thus
maintaining a constant level of refrigeration. TXV’s
are factory set. Do not adjust unnecessarily.

DO NOT ADJUST THE TXV UNTIL THE EPR
HAS BEEN SET.

The superheat setting is 4-8
temperature of the evaporator outlet at the TXV
bulb, and check the low side pressure at the EPR
valve. Convert the pressure to temperature (using
a temperature pressure chart) and subtract the

0

F. Measure the

amount from the outlet temperature. The result is
the superheat. Use an electronic thermometer.

EPR: Evaporator Pressure Regulator Valve

This valve maintains a constant pressure on its
inlet (evaporator) side regardless of the pressure
on the outlet (suction) side. The EPR is factory
set, adjust only if needed. After adjusting, re-check
TXV superheat.

EPR Settings:
RLE1202/952: 25 PSIG + or - 2 PSIG
RLE1200/950: 36 PSIG + or - 2 PSIG
RLE1500/1250: 25 PSIG + or - 2 PSIG

Evaporator:

Where the water is frozen into ice crystals. As the
water cools, it begins to turn into ice, and the
slowly turning auger lifts the ice, as it is being
made, and forces it up and out of the “breaker” or
spout where the extra water is compressed out of
the ice. The ice then drops through the chute, into
the storage bin.

THERMO VALVE

LIQUID LINE

VALVE

EPR VALVE

November 1999

Page 7

Single System RL

COMPONENT DESCRIPTION: Control Box

Circuit Board: Controlling the ice machine
through sensors and relays. The sensors are: 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 liquid line valve.

Transformer: Supplies low voltage to the circuit
board.

On/Off Switch: Manual control for that side of the
machine.

ON/OFF SWITCH

TRANSFORMER

CIRCUIT

BOARD

TERMINAL STRIP

January 1997

Page 8

COMPONENT DESCRIPTION: Evaporator

Single System RL

Evaporator: A refrigerated vertical tube filled

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.

Divider: Where the ice is compressed and much
of the extra water is squeezed out of it before it is
discharged into the bin.

BEARING

Motor: A split phase motor that drives the gear

reducer.
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

DIVIDER

WATER

SEAL

EVAPORATOR

AUGER

MOTOR

January 1997

Page 9

Single System RL

ELECTRICAL SEQUENCE

Refer the wiring diagram as needed.

Each system is separate

If the machine is switched off at the master switch,
but is otherwise ready to go, switching the master
switch to on does the following:

•The bin empty light on the circuit board goes on

•There is a 15 second delay

•If there is enough water in the reservoir, the

circuit board will allow the machine to start up.

Start up consists of:

•The liquid line relay and auger motor relay

become energized, connecting power to the
windings of the auger motor.

•The auger motor starts, and the centrifugal

switch closes, connecting power to the liquid
line valve coil.

•The liquid line valve opens, and the refrigerant

flows to the thermostatic expansion valve and
into the evaporator.

•As ice goes past the ice level sensors, the bin

empty light will stay on, and the machine will
continue to run, unless the ice stays between
the sensors for more than 15 seconds (bin full).
At that point, the bin empty light goes out, and
the machine shuts down.

Shut Down consists of:

•The liquid line relay opens.

•The liquid line valve closes

•Ice making stops

•The auger motor is run by the circuit board for 2

more minutes, clearing out ice in the
evaporator, and then

•The auger motor relay opens, and the auger

motor stops.

If the ice level sensor is clear (bin empty) for more
than 15 seconds, the machine will start up again.

Another purpose of the circuit board is to turn the
machine off if there is not enough water in the
machine.

•When the water level in the reservoir falls

below the water level sensor, the machine will
"shut down"

•When the water refills the reservoir, the

machine will start up again.

Separate from the circuit board:

•The master switch is the manual control for

each system, but it is not a service disconnect.

January 1997

Page 10

OPERATION

Single System RL

Water

Water enters the machine through the 3/8" male
flare at the rear of the cabinet, goes to the water
reservoir which it enters through the float valve.

WATER

INLET

RESERVOIR

ICE CHUTE

The water then goes out the bottom of the
reservoir tank to the bottom of the evaporator.

Reservoir overflow or evaporator condensation is
routed to the drain.

WATER LEVEL

EVAPORATOR

WATER INLET

DRIP PAN DRAIN

WATER SCHEMATIC

January 1997

Page 11

Single System RL

OPERATION: Refrigeration

The remote high side supplies high
pressure liquid refrigerant to the
liquid line connection on the ice
machine. After the sight glass, there
is a liquid line leading to a liquid line
valve. When the ice level sensor
causes the circuit board to energize
the liquid line valve, the valve
opens, allowing the liquid refrigerant
to enter the expansion valve. The
thermostatic expansion valve
meters the liquid refrigerant into the
evaporator, where it boils off
(evaporates) and absorbs heat. It
then moves through the ball valve
and into the evaporator pressure
regulator valve, or EPR. The EPR
keeps the evaporator pressure
above a predetermined point, even
though the suction line pressure of
the remote high side system may
vary. The refrigerant, now a low
pressure gas, moves into the
suction line of the remote high side
system.

LIQUID

LINE

SIGHT GLASS

HAND VALVE

LIQUID LINE

VALVE

THERMO VALVE

EVAPORATOR

SUCTION LINE

BALL VALVE

EPR VALVE

January 1997

Page 12

Single System RL

MAINTENANCE AND CLEANING

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.

It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, and
less costly in the long run, to avoid possible down time by keeping it clean; adjusting it as needed; and by
replacing worn parts before they can cause failure. The following is a list of recommended maintenance
that will help keep the machine running with a minimum of problems.

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

ICE MAKING SYSTEM: In place cleaning

1. Check and clean any water treatment devices,
if any are installed.

2. Pull out and remove the front panel.

3. Move the ON-OFF switch to OFF.

4. Remove all the ice from the storage bin.

5. Remove the cover to the water reservoir and
block the float up.

6. Drain the water reservoir and freezer assembly
using the drain tube attached to the freezer water
inlet. Return the drain tube to its normal upright
position and replace the end cap.

7. Prepare the cleaning solution: Mix eight
ounces of Scotsman Ice Machine Cleaner with
three quarts of hot water. The water should be
between 90-115 degrees F.

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.

8. Slowly pour the cleaning solution into the water
reservoir until it is full. Wait 15 minutes, then
switch the master switch to ON.

9. As the ice maker begins to use water from the
reservoir, continue to add more cleaning solution
to maintain a full reservoir.

10. After all of the cleaning solution has been
added to the reservoir, and the reservoir is nearly
empty, switch the master switch to OFF.

11. After draining the reservoir, as in step 6, wash
and rinse the water reservoir.

January 1997

12. Go thru steps 13-19 to sanitize the ice

machine water system.

13. Mix two gallons of sanitizer solution. Use an

approved sanitizer.
A possible sanitizer solution may be obtained by

mixing two gallons of warm (90-115oF.) potable
water with 1 ounce of household bleach.

14. Slowly pout the sanitizer solution into the water

reservoir until the float rises, then switch the
master switch ON.

15. As the ice machine uses water from the

reservoir, continue to pour the sanitizer solution
into the reservoir.

16. After

1

⁄

of the sanitizer solution has been

2

added to the reservoir, and the reservoir is nearly
empty, switch the master switch OFF.

17. Drain the reservoir and thoroughly wash the

interior of the reservoir and cover with sanitizer
solution. Be sure the drain hose is upright and
capped.

18. Remove the block from the float in the water

reservoir.

19. Switch the master switch to ON

20. Continue ice making for at least 15 minutes, to

flush out any cleaning solution.

DO NOT USE any ice produced from the
cleaning solution. Be sure no ice remains in
the bin.

21. Remove all ice from the storage bin.

22. Add warm water to the ice storage bin and

thoroughly wash and rinse all surfaces within the
bin.

23. Sanitize the bin interior by washing the interior

of the bin with the balance of the sanitizer solution.

24. Switch the master switch ON.

Page 13

Single System RL

MAINTENANCE

Electrical Shock Hazard

Electrical shock can cause
personal injury.
Disconnect electrical
power before beginning.

1. The bin control uses devices that sense light,
therefore they must be kept clean enough so that
they can "see". At least twice a year, remove the
bin control sensors from the base of the ice chute,
and wipe the inside clean, as illustrated.

2. The ice machine senses water level by a probe
located in the water reservoir. At least twice a
year, the probe should be removed from the
reservoir, and the tip wiped clean of mineral
build-up.

SLIDE ICE

LEVEL

CONTROLS OUT

OF CHUTE

CLEAN THE ICE

LEVEL CONTROL

SENSORS

RESERVOIR

CLEAN THE

WATER LEVEL

SENSOR

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

CAUTION: THE

TIMP IS MADE OF

GLASS

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

3. The bearing in the breaker should also be
checked at least two times per year.

Check the bearing by:

•pushing the bail clamp back and removing the

ice chute cover

Inspect the assembly, looking for wear.
See Removal and Replacement to replace bearing

or seals. Reverse to reassemble.

4. Check and tighten all bolts and screws.

ICE SWEEP

BREAKER

COVER

•unscrewing the ice sweep

•unscrewing the breaker cover

•unscrewing the auger stud

January 1997

Page 14

CLEANING

Single System RL

In some installations the water supply to the ice
maker will be so concentrated with dissolved
minerals, (such as calcium carbonate) that as ice
is made, the evaporator and auger become
coated with the minerals, requiring a more
frequent cleaning than twice per year. If in doubt
about the condition of the evaporator and auger,
the auger can be removed so the parts can be
inspected.

Note: Water filters can filter out suspended solids,
but not dissolved solids. "Soft" water may not be
the complete answer. Check with a water
treatment specialist regarding water treatment.

ALLEN HEAD

DIVIDER, AUGER

AND SLOTTED

COLLAR

SCREWS

Switch off electrical power, and shut off the
water supply.

For more information on removal of these
parts, see REMOVAL AND REPLACEMENT.

1. To remove the auger, remove front and top

panel. If top panel cannot be removed, or if there
is less than 6" clearance over the top of the
machine, the gearmotor/evaporator may be slid
out for service access. See Removal And
Replacement.

2. Push bail clamp back and remove ice chute

cover.

3. Unscrew and remove ice sweep.

4. Loosen band clamp under ice chute, and

remove ice chute from evaporator.

5. Remove 4 allen head screws holding breaker to

evaporator.

6. Pull up on breaker to remove auger.

Allow the auger to dry, the stainless steel of the
auger and evaporator must be clean and bright.
Clean the auger and evaporator as required. DO
NOT HONE THE EVAPORATOR.

7. Replace the water seal.

8. Reverse to reassemble.

January 1997

Page 15

Single System RL

SERVICE DIAGNOSIS: Condition - No Ice Being Produced

STATUS: NOTHING OPERATES

A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate.
B. Check: The master switch, switch ON if off.
C. Check the water level in the reservoir. The machine will not run if there is not enough water in the

reservoir. Restore/adjust water level.

STATUS: NOTHING OPERATES

D. Check: The gear motor, if it will not run, the liquid line valve will not open. If no power to it:

Check: The indicator lights on the circuit board, the bin empty light should be ON, the no water light
should be OFF .

1. If the bin empty and no water lights are off, check the transformer.
a. Transformer "load" side should have 12 to 15 volts. If not, check the "line" side. The line

side should have between 208-230 volts. If the line side has the correct voltage and the

load side does not, replace the transformer.

2. If the transformer is good, and the bin empty light is OFF, check the ice level sensors.
a. Remove sensors by sliding them sideways out of the ice chute. Visually inspect them,
clean if needed.
b. Look through the ice chute "eye" hole for something blocking the ice chute.
c. If the unit still does not run, replace the ice level sensors.
d. If the bin empty light is still OFF, check the circuit board. SEE LAST PAGE FOR TESTER

INFORMATION

3. If the transformer is fine, and the "no water" light is ON, check the water level sensor.
a. Check the water level in the reservoir, restore if low. If the water level is ok:
b. Remove the water level sensor from the reservoir and clean the tip if dirty.
CAUTION: THE TIP IS MADE OF GLASS
c. Replace the water level sensor. If the no water light is still on, check that the
"water sen" plug is firmly plugged into the circuit board.
d. If the no water light is still on, SEE LAST PAGE FOR TESTER INFORMATION
e. If after the above, the machine still will not run, replace the water level sensor

January 1997

Page 16

Single System RL

STATUS: GEARMOTOR OPERATES, BUT NO ICE IS MADE

A. Check the liquid line valve relay.

The relay is on the circuit board, if it does not supply power to the liquid line valve, the
valve will not open.

1. Check for power at the valve coil, if none:
a. Check for power at the liquid line valve relay at the circuit board.
If there is power at the relay, but none at the liquid line valve coil,

Check for an open wire between the relay and the valve.

2. Check the valve coil. If the coil is open, replace the liquid line valve.

3. Check the auger drive motor centrifugal switch. If, when the drive motor is running,

contact 4 (black wire removed) has no power, and all of the above switches have been
checked, replace the centrifugal switch, or the drive motor.

4. If the liquid line valve relay on the circuit board has power on the NO contact, but not on the COM

contact, replace the circuit board.

January 1997

Page 17

Single System RL

REMOVAL AND REPLACEMENT

WATER RESERVOIR

1. Shut off the water supply to the ice maker.

2. Remove front panel and reservoir cover.

3. To remove float only, disconnect water inlet
tube, push in the tab behind the reservoir and pull
valve assembly out of the reservoir tank.

4. To remove reservoir, disconnect water inlet
compression fitting at reservoir inlet.

5. Remove drain hose from reservoir.

6. Remove evaporator inlet hose from reservoir.

7. Remove mounting screws from reservoir
bracket, and remove reservoir from ice maker.

8. Reverse to reassemble.

Internal

Plunger

BIN CONTROLS (Ice Level Sensors)

1. Disconnect electrical power.

2. Remove front panel.

3. Remove control box cover.

4. Locate ice chute, at the base of the chute, in
front of and behind it are two plastic bin control
mounts.

5. Slide each bin control to the left, and in the
control box, disconnect the electrical leads
connecting the bin control to the circuit board.

6. Reverse to reassemble, be certain that the bin
controls are aligned so that the ice level sensors
are visible (centered) through the holes in the cube
chute.

SLIDE BIN

CONTROLS

IN AND OUT

Float Valve

January 1997

Page 18

Single System RL

REMOVAL AND REPLACEMENT: Bearing And Breaker

Note: Removal of the auger, water seal,
evaporator and gearmotor must begin at the top of
the assembly.

To Remove the Breaker Bearing Assembly:

. Lift up, and remove breaker/bearing assembly
from auger & evaporator.

6. Service the bearing. Check for rust, rough spots
and damage.

a. The bearing is pressed into the breaker, to
remove the bearing and replace it an arbor press
is needed.

Electrical Shock Hazard

Electrical shock can cause
personal injury.
Disconnect electrical
power before beginning.

1. Remove panels and disconnect electrical power.

2. Push back bail clamp, remove insulation
retaining strap and insulation, remove ice chute
cover.

3. Unscrew and remove ice sweep.

4. Loosen band clamp under ice chute, lift up and
remove ice chute.

5. The breaker may be removed from the auger
and evaporator without disturbing the auger.

a. Unscrew breaker cover from breaker (left hand

b. Replace lower seals before installing new
bearing in breaker.

Note: seals must be pressed in with a tool pushing
against the outer edge only, they will not install by
hand.

Replace parts as required. Re-grease bearing with
Scotsman part no. 19-0609-01 bearing grease.
Replace top seal, and check the o-rings, replace if
cut or torn.

7. Reverse to reassemble: specific tools and
materials are required to install properly.

a. Add food grade grease such as Scotsman part
number 19-0569-01 to the seal area before
installing on the auger.

b. Check the seal to shaft areas for cuts, or rough
spots: none are permitted.

threads)
b. Unscrew auger stud from top of auger.
c. Unscrew 4 allen head cap screws holding

breaker to evaporator.
Step 5- a Step 5-b Step 5-c and Step 6

d

ICE SWEEP

BREAKER

COVER

BEARING

SEALS

SLOTTED

COLLAR

AUGER

STUD

DIVIDER

January 1997

Page 19

Single System RL

REMOVAL AND REPLACEMENT

To Remove the Auger:

Turn off the water to the machine, and unclip the
evaporator drain hose, pull it down and drain the
evaporator into the bin or a container.

Electrical Shock Hazard

Electrical shock can cause
personal injury.
Disconnect electrical
power before beginning.

1. The top panel must be removed.

2. Remove ice chute cover.

3. Unscrew ice sweep.

4. Loosen band clamp and remove ice chute body.

5. The auger and breaker/bearing may now be
removed as an assembly.

a. Unscrew 4 allen head cap screws holding
breaker to evaporator.

b. Lift up on breaker and remove auger from
evaporator.

d. Lift up and remove breaker from evaporator.
e. If the auger is stuck use a slide hammer type

puller to pull on the auger at the threaded hole.
The size of that hole is 5/8"-18.

Inspect the auger, the critical areas of the auger
are:

1. The auger body. It should be clean and
shining. Sometimes an auger will appear clean
when wet, but after it is dry it will be seen to be
stained. Scrub the auger with ice machine cleaner
and hot water.

Ice machine cleaner is an acid. Handle it with
extreme care, keep out of the reach of children.

2. The water seal area. Because the auger has
been removed, the water seal will have to be
replaced. Remove the water seal top half from the
auger, and inspect the auger for minerals clean as
required.

DIVIDER

AND

AUGER

ASSEMBLY

Note: If the auger is stuck, the breaker must be
removed from the auger.

The breaker may be removed from the auger and
evaporator without disturbing the auger.

a. Use spanner wrench and unscrew breaker
cover from breaker (left hand threads)

b. Unscrew auger stud from top of auger.
c. Unscrew 4 allen head cap screws holding

breaker to evaporator.

SLIDE HAMMER

PULLER

THREAD INTO THE

AUGER HERE

January 1997

Page 20

REMOVAL AND REPLACEMENT

Moving Parts Hazard.

Moving parts can cause
personal injury.
Disconnect electrical
power before beginning.

To Remove the Water Seal:

(Assuming all steps to remove the auger have
been performed.)

1. The gearmotor/evaporator assembly will have to
be exposed.

2. Remove the 4 hex head cap screws holding the
evaporator to the gearmotor assembly. Lift the
evaporator up and off of the gearmotor.

3. Remove the snap ring or wire retainer from the
grove under the water seal.

4. Pull or drive out the lower half of the water seal.

Single System RL

To Replace the Water Seal:

1. Lubricate the water seal with water, and push
the water seal into the bottom of the evaporator
slightly past the grove for the snap ring.

2. Replace the snap ring and pull the water seal
down against it.

3. The part of the water seal that rotates with the
auger must also be replaced. Remove the old part
from the auger and clean the mounting area.

4. Place a small bead of food grade silastic sealant
(such as 732 RTV or Scotsman part number
19-0529-01) on the area of the auger where the
water seal is to be mounted.

5. Carefully push the water seal (rubber side
against the auger shoulder and the silastic.)

CAUTION

Do not get any silastic onto the face of the seal.

6. Allow the auger and seal to air dry until the
silastic is dry on the surface.

7. If the original water seal was leaking, it would be
a good idea to inspect the interior of the gearmotor.

WATER

SEAL

RETAINING

RING

PLACE FOOD

GRADE SEALANT

HERE

January 1997

Page 21

Single System RL

REMOVAL AND REPLACEMENT: Evaporator

To Replace the Evaporator:

(Assuming all the steps for removal of the thrust
bearing, breaker, auger, and water seal have been
performed.)

1. Shut the hand valves in the liquid and suction
lines to the evaporator being serviced; then
discharge the refrigerant.

2. Unsweat the refrigerant connections:
a) At the thermostatic expansion valve outlet.

CAUTION

Heat sink the TXV body when unsweating or
resweating the adjacent tubing.
b) At the suction line at the joint about 3" from the

evaporator.

3. Remove the
evaporator.

4. Unsweat the drier
from the liquid line.

5. After installing a
new water seal in the
new evaporator (see
"To Replace the
Water Seal") sweat in
the new evaporator at
the old connections.

6. Install an new drier
in the liquid line.

7. Evacuate the
system until
dehydrated, then
weigh in the
nameplate charge.
Check for leaks.

8. Install auger,
breaker, breaker
bearing assembly,
and ice discharge
chute in reverse order
of disassembly. See
"To Reassemble
Evaporator and Auger"

ICE SWEEP

BEARING

To Reassemble the Evaporator and Auger

1. After the gearmotor has been inspected, fasten
the evaporator to the gear motor, torque the bolts
to 110 inch pounds.

2. Lower the auger into the evaporator barrel,
slightly turning it to match up with the drive end.
Do Not Drop Into the Evaporator.

3. Complete the reassembly by reversing the
disassembly for the breaker & thrust bearing
assembly.

AUGER

EVAPORATOR

DRIP PAN

DIVIDER/BREAKER

January 1997

Page 22

REMOVAL AND REPLACEMENT: Gearmotor

Single System RL

To Remove and Repair the Gearmotor
Assembly:

(Assuming that the procedures through removal of
the water seal have been performed.)

1. Remove the electrical wires from the gear drive
motor.

2. Unscrew the 4 cap screws holding the
gearmotor to the gearmotor plate.

3. Remove the gearmotor from the ice maker.

To Inspect the gearmotor.

A) Remove the cap screws holding the gearmotor
case halves together and pry the two cases apart.

B) To lift off the cover, lift up until you can feel
internal contact, then pull the cover towards the
output gear end, and then
lift the cover (with drive
motor attached) up and
away from the gear motor
case.

Note: The case cover
output gear, bearings, and
shaft are one pressed
together assembly.
Replace as a unit.

C) Inspect the oil, gears,
and bearings. If the oil
level and condition is
acceptable, quickly check
the gears and bearings.
They are likely to be fine if
the oil is.

If there is evidence of
water in the oil (rusty
bearings and gears; the oil
having a creamy white
appearance; oil level too
high) carefully inspect the
bearings and gears. If in
doubt about the condition
of a part, replace it. The oil
quantity is 16 fluid ounces,
do not overfill.

Note: The gears and
bearings are available only
as pressed together sets.

GEARCASE

D) After replacing parts as required, (if any)
reassemble the gearcase. The two smaller gears
and the oil should be in the lower case, the output
gear will be with the cover. As you lower the cover
onto the lower case, cover will have to be moved
closer to the second gear after the output gear has
cleared the second gear top bearing.

E) After the case is together, and the locating pins
are secure in both ends, replace all cap screws.

4. Bench test the gearmotor, check for oil leaks,
noise, and amp draw.

SEAL

MOTOR

BEARING

GASKET

January 1997

Page 23

Single System RL

CIRCUIT BOARD TESTING

These procedures require the machine to be connected to the power supply. The voltages of the
electronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. Do not touch
anything but the tester while the unit is being checked out. Make all connections to the circuit board with
the ELECTRICAL POWER OFF.

INSTRUCTIONS FOR USING TESTER, (Optional, order part no. A33942-001)

(These instructions assume that the unit will not run, and prior investigation of electric power, controls,
and mechanical parts indicates that the electronic circuit may be at fault.)

Note: All testing is done with the electrical power
on, the master switch on.

1. Unplug ‘‘photo trans’’ and ‘‘LED’’ connectors
from the circuit board.

2. Plug ‘‘photo trans’’ and ‘‘LED’’ connectors from
the tester into the circuit board.

3. Unplug "water sen" connector from the circuit
board.

4. Plug "water sen" connector from Scotsman
tester into the circuit board.

Bin Control:

a. Move the ‘‘bin full’’ switch on the tester to Full.

The light on the tester should be ON.
If the light on the tester is not on, the circuit board

should be replaced.

b. If the light on the tester IS on, move the ‘‘bin
full’’ switch to Bin Empty. The light on the tester
should go OFF, and the Bin Empty light on the
circuit board should go ON.

If the Bin Empty light is ON, wait 10-20 seconds for
the machine to start, if the machine starts, replace
the ice level sensors.

If the Bin Empty light does not come ON, the
circuit board should be replaced.

Water Level

a. Move ‘‘water’’ switch on tester to No Water
position. The No Water light on the circuit board
should go ON. If not, replace the circuit board.

b. Move the ‘‘water’’ switch on the tester to the
Water position. The No Water light on the board
should go OFF. If not replace the circuit board. If
the light does go off, replace the water level
sensor.

If the Bin Empty light is ON, wait 10-20 seconds for
the machine to start. The machine should start.

LIGHT GOES ON

PHOTO TRANS

LED

SWITCH TO

"FULL"

WATER SENS

LIGHT GOES

ON

SWITCH TO

"NO WATER"

January 1997

Page 24