Scotsman FME1200 Service Manual
INTRODUCTION
NME950 & FME1200
Page 1
To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.
This machine is a modular ice system that fits a
variety of Scotsman ice storage bins.
It features: front service for the freezer, gear
motor, control box, water reservoir, and bin control;
an electronic circuit for monitoring ice and water
level; a thermostatic expansion valve; and R-404A
as the refrigerant.
TABLE OF CONTENTS
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
SAMPLE BIN AND MACHINE COMBINATIONS . . . . . . . . . . . . . . . . . . . . . . Page 3
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 11
ELECTRICAL SEQUENCE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
OPERATION: Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
SANITIZING AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
MAINTENANCE: Air Cooled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18
MAINTENANCE AND CLEANING: Auger . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
SERVICE DIAGNOSIS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . . Page 22
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . Page 23
REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . Page 25
REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 26
REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . Page 27
REMOVAL AND REPLACEMENT: Fans . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
LIQUID CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30
CIRCUIT BOARD TESTING: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31
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.
January 1995
Note the warning symbol
where it appears. It marks a
possible hazard.
FOR THE INSTALLER
NME950 & FME1200
Page 2
BACK VIEW: AIR COOLED
WATER INLET
3/8" FLARE
DRAIN
3/4" FPT
Note: Allow 6"
behind and 6"
above either unit
for air circulation,
utility connections,
and service.
ELECTRICAL
INLET
9.5"
5.25"
3"
Condenser Inlet 3/8" FPT
2.1"
5.7"
Condenser Drain 1/2" FPT
BACK VIEW: WATER COOLED
2.9"
3.4"
DRAIN
3/4" FPT
4.9"
7.46"
ELECTRICAL
WATER
INLET
5.25"
3"
INLET
7.3"
9.43"
This machine is designed to fit the following
Scotsman storage bins:
B90 and extensions (with bin top KBT18)
BH800 using bin top KBT15 (one unit).
BH800 (two units, no bin top required).
BH900 with KBT24 (one unit)
BH900 with KBT25 (two units side by side)
When installing a new system, check to be sure
that everything is on site before beginning:
Correct Bin
Correct Ice Machine
Correct Bin Top (if required)
All kits, legs, and information required for
the specific job.
SPECIFICATIONS : ICE MAKER
Model Number
FME1200AE-3A
FME1200WE-3A
FME1200AE-32A
FME1200WE-32A
NME950AE-3A
NME950WE-3A
NME950AE-32A
NME950WE-32A
Dimensions
(w/o bin)
W x D x H
21" x 24" x 27"
same
same
same
same
same
same
same
Basic
Electrical
208-230/60/3
same
208-230/60/1
same
208-230/60/3
same
208-230/60/1
same
Installation Limitations:
This ice system is designed to be installed indoors,
in a controlled environment:
Air Temperature 50
Water Temperature 40
Water Pressure 20 PSI 80 PSI
Voltage -5% +10%
(Compared to the nameplate)
Operating the machine outside of the limitations is
misuse and can void the warranty.
The normal finish for the ice machine is
enamel-sandalwood. A stainless steel panel kit,
SPKFM21 may be field installed to convert the unit
to a stainless steel finish.
Ice Type
FLAKE
same
same
same
Nugget
same
same
same
January 1995
Condenser
Type
Air
Water
Air
Water
Air
Water
Air
Water
Min Max
0
F 1000F
0
F 1000F
Refrigerant Charge*
Air Cooled 30 oz
R-404A
Water
Cooled
* Always go by the
nameplate charge.
Note: 50 Hz (-6) models have
also been produced.
24 oz
R-404A
SAMPLE BIN AND MACHINE COMBINATIONS
NME950 & FME1200
Page 3
Air Flow on
All Air
Cooled
Models is In
the Front
and Out the
Back
The Nameplate is
located on the back
of the machine.
FME1200 ON BH550*
NME950 ON BH800*
FME1200 ON BH900*
January 1995
* Bin Top Kit Required
FOR THE INSTALLER
NME950 & FME1200
Page 4
Typical Storage Bin with Extension and Bin Top
Location:
After uncrating and inspection, the unit is ready for
installation. It is important that the machine be
installed in a location where it has enough space
around it to be accessible for service, and
minimum of 6" be allowed at the back for air
circulation on air cooled models. Try to avoid hot,
dirty and crowded locations. Be sure that the
location for the machine is within the
environmental limitations.
Storage Bin:
Tip the storage bin on its back, using parts of the
carton to protect the exterior finish. Install the legs
into the threaded holes in the bottom of the bin.
Turn the leg levelers all the way in preparation for
leveling later. Return the bin to the upright
position, remove paper covering the bin gasket.
Note: Do not push bin into position, but lift it there.
Pushing a bin, especially one with ice in it, can
cause damage to the legs and the leg mounts.
Install the appropriate bin top on the bin, according
to the instructions for the bin top.
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of UL, NSF and CUL.
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of any part and/or other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and design are subject to change
without notice.
Ice Maker:
The machine is heavy, so the use of a mechanical
lift is recommended for lifting the machine high
enough to install on top of the bin. After the unit is
placed on the bin, line it up so it is even with the
back side. Secure the machine to the bin with the
hardware provided with the machine.
Remove the front panel and remove any shipping
blocks.
January 1995
FOR THE INSTALLER: Location
NME950 & FME1200
Page 5
TWO UNITS ON ONE BIN
ALLOW ROOM
FOR AIR
CIRCULATION
AND SERVICE
ACCESS
DO NOT STACK ANYTHING IN
FRONT OF THE MACHINE(S)
January 1995
FOR THE PLUMBER
NME950 & FME1200
Page 6
CONFORM TO ALL APPLICABLE CODES
Water Inlet
Air Cooled Models: The recommended water
supply is clean, cold water. Use 3/8" O.D. copper
tubing, connect to the 3/8" male flare at the back of
the cabinet. Install a hand valve near the machine
to control the water supply.
Water Treatment: In most areas, a water filter of
some type will be useful. In areas where the water
is highly concentrated with minerals the water
should be tested by a water treatment specialist,
and the recommendations of the specialist
regarding filtration and/or treatment should be
followed.
Water Cooled Models: A separate 3/8" O.D.
copper line is recommended, with a separate hand
valve to control it. It is connected to a 3/8" FPT
condenser inlet at the back of the cabinet. The
water pressure to all lines must always be above
20 psig, and below 80 psig.
WATER
COOLED
CONDENSER
INLET
Drains
Air Cooled Models: There is one 3/4" FPT drain
at the back of the cabinet, the drain line is of the
gravity type, and 1/4 inch per foot fall is an
acceptable pitch for the drain tubing. There should
be a vent at the highest point of the drain line, and
the ideal drain receptacle would be a trapped and
vented floor drain. Use only 3/4" rigid tubing.
Water Cooled Models : In addition to the above
mentioned drain, a separate condenser drain must
be installed. Connect it to the 1/2" condenser
drain connection at the back of the cabinet.
Storage Bin : A separate gravity type drain needs
to be run, similar to the air cooled drain. Insulation
of this drain line is recommended.
AIR COOLED
MODELS
FIELD
SUPPLIED
FILTER
HAND
VALVE
WATER
FILTER
CONDENSER
DRAIN
VENTED
DRAIN
HAND
VALVE
VENTED
DRAIN
WATER
INLET
January 1995
FOR THE ELECTRICIAN
NME950 & FME1200
Page 7
CONFORM TO ALL APPLICABLE CODES
The electrical power to the unit is supplied through
the junction box at the rear of the machine.
Check the nameplate (located on the back panel)
for the voltage requirements, and for the minimum
circuit ampacity. The machine requires a solid
chassis to earth ground wire.
WATER COOLED
The ice maker should be connected to its own
electrical circuit so it would be individually fused.
Voltage variation must remain within design
limitations, even under starting conditions.
All external wiring must conform to national,
state, and local electrical codes. The use of a
licensed electrician is required to perform the
electrical installation.
POWER
SUPPLY
AIR COOLED
January 1995
FOR THE INSTALLER
NME950 & FME1200
Page 8
Final Check List
1. Is the ice system installed indoors in a location
where the air and water temperatures are
controlled, and where they do not exceed the
design limitations?
2. Is there an electrical service disconnect within
sight of the installed machine? Has the voltage
been checked, and compared to nameplate
requirements?
3. Have all the plumbing connections been made
and checked for leaks?
4. Has the machine and bin been leveled?
5. Is there a minimum of 6" clearance at the back
of the machine for proper service access and air
circulation?
6. Is the water pressure a minimum of 20 psig?
7. Has the machine been secured to the bin?
8. Is there clearance over the top of the machine
for service access?
9. Is there a water shut off valve installed near the
machine?
10. Have all of the shipping blocks been removed?
January 1995
START UP
NME950 & FME1200
Page 9
Pre-Start Inspection
1. Remove the front and side service panels.
2. Check that the styrofoam shipping blocks have
been removed.
Start Up
1. Go through the prestart inspection.
2. Open the hand valve, observe that water enters
the water reservoir, fills the tube from the reservoir
to the evaporator, and then shuts off. Check for
leaks.
3. Switch the master switch on.
The electrical start up sequence is now on
automatic.
A. There should be a short (15 second) delay
before the gear motor starts.
B. After the gear motor starts, the compressor will
start.
3. Inspect the interior of the machine for loose
screws or wires. Check that no refrigerant lines
are rubbing each other. Check that the fan blade
turns freely (air cooled).
4. Check that the unit is installed correctly
according to the final check list (page 8).
The air cooled discharge pressure will depend
upon air and water temperatures, but should be
between 200 psig and 280 psig.
The water cooled discharge pressure should be
constant at about 245 psig.
The above numbers are for new, clean machines,
you can expect to see some values higher, and
some lower between different units.
6. THERE ARE NO ADJUSTMENTS TO MAKE,
so replace the panels.
7. Clean and/or sanitize the storage bin interior,
wipe off the exterior with a clean, damp cloth.
4. On air cooled models, the condenser will begin
to discharge warm air, on water cooled models,
the water regulating valve will open, and warm
water will be discharged into the drain.
5. The unit should soon be making ice, if desired,
the low side pressure may be checked: it should
be 32 psig + or - 2 psig.
The suction line temperature at the compressor is
normally very cold, nearly to the point of frost up to
the compressor body, but not on it.
8. Give the owner/user the service manual, instruct
him/her in the operation of the unit, and make sure
they know who to call for service.
9. Fill out the manufacturers registration card, and
mail it to the Scotsman Factory.
10. Fill out the warranty registration form, and mail
it to Scotsman.
January 1995
COMPONENT DESCRIPTION
NME950 & FME1200
Page 10
Control Box: Contains the electrical controls that
operate the machine.
High Pressure Cut Out Switch : A manual reset
switch sensing the high side refrigeration pressure.
It is set to shut the machine off if the discharge
pressure should ever exceed 450 psig.
Evaporator: A vertical stainless steel tube,
refrigerated, and water filled. In it there is a
stainless steel auger.
Compressor: The refrigerant vapor pump.
Reservoir: Float operated, it maintains the water
level in the evaporator at a constant level, it also
contains the water level sensor.
Water Level Sensor: Senses if there is water in
the reservoir to make ice out of. Will shut the
machine off it there is none.
Ice Discharge Chute : Directs the ice produced
by the evaporator into the storage bin.
Ice Level Sensor: An electronic "eye", it senses
the presence of ice in the bottom of the ice
discharge chute. Operates to turn the ice machine
on and off automatically as the level of ice in the
bin changes.
Gear Motor: An oil filled, speed reduction
gearbox, driving the auger.
Drain Tube : When uncapped and lowered, drains
the evaporator.
Condenser: Air or water cooled, where the heat
removed in ice making is discharged.
Expansion valve : The refrigerant metering
device.
AIR COOLED
Hi Pressure
Cut Out
CONTROL BOX
RESERVOIR
CONDENSER
EXPANSION
VALVE
DRAIN
TUBE
ICE CHUTE
COMPRESSOR
January 1995
ICE LEVEL
SENSORS
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