Scotsman NME1854R Operator’s Manual
INTRODUCTION
NME1854R & FME2404R
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 either ice system.
The product is a remote condenser modular ice
system. Its features include: front service for the
freezer, gear motor, control box, water reservoir,
and bin control; an electronic circuit for monitoring
ice and water level; and R-404A as the refrigerant.
Table of Contents
FOR THE INSTALLER ···································· Page 2
REMOTE CONDENSER SPECIFICATIONS ························· Page 3
FOR THE INSTALLER ···································· Page 4
Remote Condenser Location ································· Page 5
FOR THE INSTALLER: Remote Condenser ························· Page 6
FOR THE INSTALLER: Precharged Lines ·························· Page 7
FOR THE INSTALLER: Location ······························· Page 8
FOR THE PLUMBER ····································· Page 9
FOR THE ELECTRICIAN ·································· Page 10
FOR THE INSTALLER: Completed Installation ······················· Page 11
FOR THE INSTALLER: Final Check List ··························· Page 12
START UP ·········································· Page 13
COMPONENT DESCRIPTION ································ Page 14
OPERATION: Water ····································· Page 15
COMPONENT DESCRIPTION: Control Box ························· Page 16
ELECTRICAL SEQUENCE ·································· Page 17
SYSTEM INFORMATION ·································· Page 18
OPERATION: Refrigeration ································· Page 19
OPERATION: Refrigeration ································· Page 20
CLEANING and SANITATION ································ Page 21
SENSOR MAINTENANCE ·································· Page 22
BEARING MAINTENANCE ·································· Page 23
AUGER MAINTENANCE ··································· Page 24
SERVICE DIAGNOSIS: Condition ······························ Page 25
SERVICE DIAGNOSIS: ··································· Page 26
CONTROL SYSTEM DIAGNOSTICS ···························· Page 27
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls ············· Page 28
REMOVAL AND REPLACEMENT: Bearing And Breaker ·················· Page 29
REMOVAL AND REPLACEMENT: Auger ·························· Page 30
REMOVAL AND REPLACEMENT: Water Seal ······················· Page 31
REMOVAL AND REPLACEMENT: Evaporator ······················· Page 32
REMOVAL AND REPLACEMENT: Gear motor Assembly ·················· Page 33
REFRIGERATION SYSTEM SERVICE ··························· Page 34
What to Do Before Calling for Service ···························· Page 35
The manual was printed on recycled paper. Keep it
for future reference.
Note the Warning symbol where it appears. It
marks a possible hazard.
January 2000
Page 1
NME1854R & FME2404R
FOR THE INSTALLER
These machines are designed to fit
the following Scotsman storage
bins:
B90 and extensions, with bin top
·
KBT18.
BH800 no bin top needed.
·
BH900 using bin top KBT14.
·
When installing a new system,
check to be sure that you have
everything you need before
beginning:
Correct Bin
·
Correct Ice Machine
·
Correct Bin Top
·
All kits, legs, and information
·
required for the specific job.
There are two separate ice making
and refrigeration systems in this
model. The liquid and discharge
lines from each system must go to
separate circuits in one remote
condenser (ERC302).
Ice Chute
6.7" x 6.2"
TOP VIEW
Allow 6" of space behind the machine
for utility connections.
34.84"
BACK VIEW Liquid Line
15.53"
3.1"
21"
3.1"
18.28"
13.84"
Discharge Line
Connection
(left system)
Allow 6"
above
machine for
service.
20.84"
5.25"
3"
17.8"
18.8"
SPECIFICATIONS: Ice Machine
Model Number Dimensions
(w/o bin)
HXWXD
FME2404RS-32A 27" x 42" x 24" 208-230/60/1 FLAKE R-Air 22.8 30 208
FME2404RS-3A 27" x 42" x 24" 208-230/60/3 FLAKE R-Air 17.6 20 208
NME1854RS-32A 27" x 42" x 24" 208-230/60/1 Nugget R-Air 22.8 30 208
NME1854RS-3A 27" x 42" x 24" 208-230/60/3 Nugget R-Air
Basic
Electrical
21.66"
Ice Type Cond.
Type
Drain 3/4" FPT
Minimum
Circuit
Ampacity
Remote Condenser
Electrical Inlet
Water Inlet 3/8" Flare
Maximum
Fuse Size
4.5"
9.43"
Junction Box
Refrigerant
Minimum circuit ampacity is used to determine wire size and type per National Electrical Code.
January 2000
Page 2
Charge
NME1854R & FME2404R
REMOTE CONDENSER SPECIFICATIONS
Model Use with Basic Electrical
ERC302-32 1 FME2404R or NME1854R 208-230/60/1
ERC DIMENSIONS
Model A B F G
ERC302 43
13
23
3
"10
8
"
16
3
4
3
21
"16
4
5
"
8
Other Required Items:
RTE25 Precharged line set, 25’, R-404A - 2 required.
Or: RTE40. Precharged line set, 40’, R-404A - 2 required.
7
19
"
8
Ice Machine NAMEPLATE
LOCATED ON BACK PANEL
SERIAL PLATE LOCATED
BEHIND FRONT PANEL
REMOTE CONDENSERS AND BINS ALSO
HAVE MODEL AND SERIAL NUMBERS
January 2000
Page 3
NME1854R & FME2404R
FOR THE INSTALLER
Installation Limitations:
This ice system is designed to be installed indoors,
in a controlled environment:
Min Max
0
Air Temperature 50
(Not including the remote condenser)
Water Temperature 40
Water Pressure (psi) 20 80
Voltage 198 253
(Compared to the nameplate)
Operating the machine outside of the limitations is
misuse and can void the warranty.
Water Limitations:
An ice machine is a food manufacturing plant; it
takes a raw material, water, and turns it into a food
product, ice. The purity of the water is very
important in obtaining pure ice and in maximizing
product life. This is not intended as a complete
resource for water related questions, but it does
offer these general recommendations:
1. Check with a water treatment specialist for a
water test, and recommendations regarding filters
and treatment.
2. In most cases, the water used to make ice
should be filtered or treated, depending upon the
water. There is no one type of water filter that will
be effective in all situations. That is why a water
test is important.
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.
F 1000F
0
F 1000F
Location
Install the machine a location where it has enough
space around it to be accessible for service,
usually a minimum of 6 inches. Avoid hot, dirty and
crowded locations. Be sure that the location for the
machine is within its limitations for air and water
temperatures.
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.
Install the bin top according to the directions with
the bin top.
Note: Do not push bin into position, instead lift it
there. Pushing a bin, especially one with ice in it,
can cause damage to the legs and the leg mounts.
Ice Machine
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.
Note: Be sure to allow a 6" minimum space
above the top of the machine for service.
January 2000
Page 4
Remote Condenser Location
NME1854R & FME2404R
Use the following for planning the placement of
the condenser relative to the ice machine
Location Limits - condenser location must not
exceed ANY of the following limits:
Maximum rise from the ice machine to the
·
condenser is 35 physical feet
Maximum drop from the ice machine to the
·
condenser is 15 physical feet
Physical line set maximum length is 100 feet.
·
Calculated line set length maximum is 150.
·
Calculation Formula:
Drop = dd x 6.6 (dd = distance in feet)
·
Rise = rd x 1.7 (rd = distance in feet)
·
Horizontal Run = hd x 1 (hd = distance in feet)
·
Calculation: Drop(s) + Rise(s) + Horizontal Run
·
= dd+rd+hd = Calculated Line Length
Configurations that do NOT meet these
requirements must receive prior written
authorization from Scotsman.
Do NOT:
Route a line set that rises, then falls, then rises.
·
Route a line set that falls, then rises, then falls.
·
Calculation Example 1:
The condenser is to be located 5 feet below the ice
machine and then 20 feet away horizontally.
5 feet x 6.6 = 33. 33 + 20 = 53. This location would
be acceptable
Calculation Example 2:
The condenser is to be located 35 feet above and
then 100 feet away horizontally.
35 x 1.7 = 59.5. 59.5 +100 = 159.5. 159.5 is
greater than the 150 maximum and is NOT
acceptable.
rd
22.87"
dd
17.15"
Remote
Condenser
Located ABOVE
Ice Machine
Remote
Condenser
Located BELOW
Ice Machine
hd
40.35"
January 2000
Page 5
NME1854R & FME2404R
FOR THE INSTALLER: Remote Condenser
Location
Select the best available location, protecting the
condenser from extremes of dirt, dust, and sun.
Meet all applicable building codes. Usually the
services of a licensed electrician are required.
Roof Attachment
1. Install and attach the remote condenser 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.
2. Have an electrician connect the remote
condenser fan motor to the Ice Machine, using the
junction box at the back of the Ice Machine.
PRECHARGED LINE ROUTING
CAUTION
Do not connect precharged tubing until all routing
and forming of the tubing is complete. See the
coupling instructions for connecting information.
1. Each set of precharged refrigerant lines (either
25 foot or 40 foot) consists of a 3/8 inch diameter
liquid line and a 1/2 inch diameter discharge line.
Both ends of each line have quick connect
couplings, one end has a schrader valve
connection, that end goes to the condenser.
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 the refrigerant lines of 1 3/4 inch. Check local
codes, a separate hole may be required for the
electrical power to the condenser.
CAUTION
DO NOT KINK OR CRIMP REFRIGERANT
TUBING WHEN INSTALLING IT.
Note: Precharged tubing contains a R-404A
holding charge. The entire refrigerant charge
required for the system is contained in the ice
machine.
Tubing illustration shows tight spiral; a spiral in the
field depends on tubing limitations. Tight spiral not
required.
REMOTE CONDENSER
SPIRAL
EXCESS
TUBING
INSIDE
BUILDING
LOCATE REMOTE
CONDENSER ABOVE
Ice Machine
3. Route the refrigerant lines through the roof
opening.
Follow straight line routing whenever possible.
Any excess tubing MUST be retained within the
building.
4. Spiral the excess length of pre charged tubing
inside the building. Use a horizontal spiral (as
illustrated) to avoid any traps in the lines.
5. Have the roofing contractor seal the holes in the
roof per local codes.
January 2000
Page 6
FOR THE INSTALLER: Precharged Lines
NME1854R & FME2404R
Note: The couplings on the sets of precharged
lines must be installed properly to prevent leaking.
Carefully follow the instructions:
Initial Connections:
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.
Clean and Lubricate Couplings
3. Position the fittings on the correct connections
on the condenser and ice machine.
· The ½ inch discharge line (schrader valve end)
goes to the remote condenser fitting marked
“discharge line.”
3
·
The
to the remote condenser fitting marked “liquid
line.”
·
The ½ inch discharge line goes to the Ice
Machine fitting marked “discharge line.”
·
The
fitting marked “liquid line.”
Final Connections:
4a. Begin by tightening the couplings together by
hand. Continue to turn the swivel nuts by hand until
is is certain that the threads are properly engaged.
inch liquid line (schrader valve end) goes
8
3
inch liquid line goes to the Ice Machine
8
4b. Using two wrenches, one to rotate the swivel
nut and one to hold the tubing, tighten each
coupling.
Tighten Swivel Nut
It is CRITICAL that ONLY the NUT on the
pre-charged tube be turned or the diaphragms will
be torn loose by the piercing knives and be loose
in the refrigeration system causing severe
operational problems.
Note: As the coupling is tightened, the diaphragms
in the quick connect couplings will begin to be
pierced. As that happens, there will be increased
resistance to tightening the swivel nut.
4c. Continue tightening the swivel nut until it
bottoms out or a very definite increase in
resistance is felt (no threads should be showing).
Do NOT overtighten.
5. 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.
6. After all connections are made, and after the
king valve has been opened (do not open at this
time), check the couplings for leaks.
SCHRADER
TO REMOTE
CONDENSER
NO SCHRADER
VALVE
Rotate Swivel Nut ¼ Turn More
TO Ice Machine
January 2000
Page 7
NME1854R & FME2404R
FOR THE INSTALLER: Location
CONTACT ROOFING
CONTRACTOR
EXCESS
PRECHARGED
TUBING INSIDE
BUILDING
REMOTE
CONDENSER
ROOF
CUTAWAY
ICE MACHINE
SERVICE
ACCESS
SERVICE ACCESS
SIDE AND BACK
WALL
CUTAWAY
January 2000
Page 8
FOR THE PLUMBER
CONFORM TO ALL APPLICABLE CODES
NME1854R & FME2404R
Water Inlet
HAND SHUT
OFF VALVE
CONNECT TO
COLD WATER
WATER INLET
3/8" MALE
FLARE
FIELD SUPPLIED
WATER FILTER
VENT ICE
MACHINE
DRAIN,
3/4" FPT
Connect the ice machine to cold
potable water. Use 3/8" O.D. copper
tubing, and 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.
Drains
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. Install 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.
Storage Bin: Install a separate
gravity type drain. Insulation of this
drain line is recommended.
VENT BIN DRAIN
3/4" FPT
FLOOR DRAIN
January 2000
Page 9
NME1854R & FME2404R
FOR THE ELECTRICIAN
CONFORM TO ALL APPLICABLE CODES
Connect electrical power to the wires in the
junction box at the rear of the machine.
Check the nameplate (located on the back panel)
for the voltage requirements, and for the minimum
circuit ampacity. The machine requires a solid
chassis to earth ground wire.
The Ice Machine 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.
Electrically the remote condenser fan motor is
connected to the Ice Machine at the contactor
terminals for the compressor and the fan motor
operates whenever the compressor operates.
TERMINAL STRIP
FOR REMOTE
CONDENSER
ICE MACHINE
JUNCTION BOX
POWER
SUPPLY
Electrical connections are made at the junction
box at the back of the Ice Machine and at the
junction box on the remote condenser.
The remote condenser must be wired to the Ice
Machine in accordance with local and national
electrical codes with a minimum of 18 Awg. wire
with an ground bonding wire connected to the
ground screws provided in both the condenser and
machine field wiring boxes. All outdoor wiring must
be in rain proof conduit.
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.
GROUND
THE
CHASSIS
RAIN PROOF
CONDUIT
January 2000
Page 10
NME1854R & FME2404R
FOR THE INSTALLER: Completed Installation
A typical installation should generally appear as
illustrated below. The remote condenser must be
located above the Ice Machine and the precharged
lines installed per the instructions on page 6.
INSULATED
PRECHARGED
REFRIGERANT
TUBING
January 2000
Page 11
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