Scotsman NM650R Installation Manual
INTRODUCTION
NM650R
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.
The NM650R is a remote condenser modular
ice system that fits a variety of Scotsman
storage bins. It features: front service for the
freezer, gearmotor, control box, water
reservoir, and bin control; an electronic circuit
for monitoring ice and water level; a
thermostatic expansion valve; and R-502 as
the refrigerant.
TABLE OF CONTENTS
For the Installer
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Removal and Replacement
Water Reservoir & Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Thrust Bearing & Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Circuit Board Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow
paper.
December, 1988
Page 1
Electrical
Inlet
Min.
Circuit
Ampacity
14.9
22.5
NM650R
FOR THE INSTALLER
The NM650R is designed to fit the following
Scotsman storage bins:
••B590 and extentions, with bin top KBT18.
••BH800 using bin top KBT15 (one unit).
••BH800 if using two units, no bin top needed.
••BH1000 using bin top KBT16.
Top View
Allow 6" of space behind the machine
for utility connections.
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.
Back View
Allow 6" above
machine for service.
Liquid Line
Connnection
Discharge Line
Connection
Remote Condenser
Junction Box
SPECIFICATIONS: ICEMAKER
Model Number
NM650RE-32A
NM650RE-1A
Diminsions
(w/o bin)
H X W X D
27" x 21" x 24"
same
20.84"
Basic
Electrical
208-230/60/1
115/60/1
Drain
3/4" FPT
Ice Type
NUGGET
same
Cond.
Type
R/Air
R/Air
2.96"
Max
Fuse
Size
25
35
Water Inlet
3/8" Flare
3"
Comp.
H.P.
3/4
3/4
5.25"
* Minimum Circuit Ampacity is used to determine wire size and type per National Electric Code.
The Standard Finish is Enamel - Sandalwood. There is an optional stainless steel panel kit,
SPKFM21 available to convert the unit to Stainless Steel. It is field installed.
December, 1988
Page 2
FOR THE INSTALLER
42.25"
NM650R
Installation Limitations:
This ice system is designed to be installed
indoors, in a controlled environment:
Min Max
Air Temperature 50
0
F 1000F
(Not including the remote condenser)
Water Temperature 40
0
F 1000F
Water Pressure 20 PSIG 80 PSIG
Voltage -5% +10%
(Compared to the nameplate)
Operating the machine outside of the
limitations is misuse and can void the warranty.
33"
30.5"
Scotsman Ice Systems are designed and
manufactured with the highest regard for
safety and performance. They meet or
exceed the standards of UL, NSF, and CSA.
Scotsman assumes no liability or responsibility
of any kind for products manufactured by
Scotsman that have been altered in any way,
including the use of any part and/or other
components not specifically approved by
Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and design are subject to
change without notice.
B590
21.12"
22.38"
6"
4"
32"
4.88"
32.5"
1.25"
December, 1988
Page 3
21.12"
Drain
3/4"
FPT
27.81"
19.86"
+Included with the icemakers minimum circuit ampacity.
Use this value to determine wire size between icemaker and
fan motor.
NM650R
REMOTE CONDENSER SPECIFICATIONS
1/2" MALE QUICK CONNECT
COUPLING FOR USE WITH
RT625 OR RT640
PRECHARGED LINE SET
22"
5.75"
5.38"
32.56"
6.5"
3.5"
1.94"
5.0"
MODEL USE WITH MINIMUM CIRC.
RC1051-32
RC1052-32
RC551-1
DIMENSIONS
H" X W" X D"
27.8" X 22 X 37.94"
SAME
SAME
1 or 2 NM650R’S (-32)
LIQUID LINE 3/8" MALE
COUPLING FOR USE WITH
PRECHARGED LINE SET
1 NM650R-32
1 NM650R-1
7.5"
QUICK CONNECT
RT625 OR RT640
AMPACITY+
2
2
4.1
BASIC
ELECTRICAL
208-230/60/1
SAME
115/60/1
RT-625 Precharged line set, 25’, R-502
RT-640. Precharged line set, 40’, R-502
KCMR230. Fan Relay Kit used when two 230 volt (-32) icemakers are on one 230 volt (-32) two
circuit condenser.
December, 1988
ICEMAKER NAMEPLATE
LOCATED ON BACK PANEL
SERIAL PLATE LOCATED
BEHIND FRONT PANEL
Page 4
FOR THE INSTALLER
Typical Storage Bin with Extension and Bin Top
NM650R
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, usually a minimum of 6 inches. Try to
avoid hot, dirty and crowded locations. Be
sure that the location for the machine is within
the limitations described on page 3.
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, but lift it
there. Pushing a bin, especially one with ice in
it, can cause damage to the legs and the leg
mounts.
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.
Note: Be sure to allow a 6" minimum space
above the top of the machine for service.
December, 1988
Page 5
REMOTE CONDENSER
SPIRAL
EXCESS
TUBING
INSIDE
BUILDING
NM650R
FOR THE INSTALLER: Remote Condenser
Location
Limited to a 40 foot or a 25 foot length of
precharged refrigerant tubing connecting the
icemaker to the remote condenser. The
condenser must be above or level with the
icemaker.
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 icemaker, using
the junction box at the back of the icemaker.
PRECHARGED LINE ROUTING
////////////////////////////CAUTION/////////////////////////////
Do not connect precharged tubing until all
routing and forming of the tubing is complete.
See the coupling instructions, page for
connecting instructions.
/////////////////////////////////////////////////////////////////////////
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.
/////////////////////////////////////////////////////////////////////////
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.
LOCATE REMOTE
CONDENSER
ABOVE ICEMAKER
December, 1988
Page 6
FOR THE INSTALLER: Precharged Lines
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.
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.
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. Connect the 3/8 inch liquid line (schrader
valve end) to the remote condenser fitting
marked "liquid line".
6. Connect the other end of the liquid line to
the icemaker fitting marked "liquid line."
7. Connect the 1/2 inch discharge line
(schrader valve end) to the remote condenser
fitting marked "discharge line".
8. Connect the other end of the liquid line to
the icemaker fitting marked "discharge line".
9. After all connections are made, and after
the king valve has been opened, check the
couplings for leaks.
NM650R
SERVICE PORTS
REMOTE CONDENSER
3/8" LIQUID LINE
1/2" DISCHARGE
LINE
SCHRADER
VALVE
TO REMOTE
CONDENSER
NO SCHRADER
VALVE
TO ICEMAKER
December, 1988
Page 7
ICEMAKERS
NM650R
FOR THE INSTALLER: Location
TWO UNITS ON ONE
CONDENSER
EXCESS
PRECHARGED
TUBING INSIDE
BUIDLING
REMOTE
CONDENSER
ROOF
CUTAWAY
SERVICE
ACCESS
SERVICE ACCESS
SIDE AND BACK
WALL
CUTAWAY
December, 1988
Page 8
FOR THE PLUMBER
FIELD
SUPPLIED
WATER FILTER
CONFORM TO ALL APPLICABLE CODES
NM650R
Water Inlet
HAND SHUT
OFF VALVE
CONNECT TO
COLD WATER
WATER INLET
3/8" MALE
FLARE
VENT
ICEMAKER
DRAIN,
3/4" FPT
The recommended water supply is
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.
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. 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.
Storage Bin: A separate gravity
type drain needs to be run.
Insulation of this drain line is
recommended.
VENT BIN DRAIN
3/4" FPT
FLOOR DRAIN
December, 1988
Page 9
NM650R
FOR THE ELECTRICIAN
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.
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.
TERMINAL STRIP
FOR REMOTE
CONDESNER
ICEMAKER
JUNCTION BOX
Electrically the remote condenser fan motor is
connected to the icemaker at the contactor
terminals for the compressor and the fan
motor operates whenever the compressor
operates.
Electrical connections are made at the
junction box at the back of the icemaker and
at the junction box on the remote condenser.
The remote condenser must be wired to the
icemaker 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 rainproof
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
POWER
SUPPLY
RAIN PROOF
CONDUIT
December, 1988
Page 10
NM650R
FOR THE ELECTRICIAN: Fan Relay Kit - 230 volt (-32) only
///////////////////////////WARNING/////////////////////////////
Do all wiring with the electrical power
disconnected.
/////////////////////////////////////////////////////////////////////////
To install the KCMR230 fan relay kit when
using (2) FM800R icemakers and one 230
volt, two circuit remote condenser.
Do not use with FM800RE-1A (115v)
See the remote condenser nameplate for
current requirements to determine wire size to
be used for electrical hookup. Refer to wiring
diagram.
All external wiring should conform to the
national, state and local electrical codes.
Usually an electrical permit and services of a
licensed electrician will be required.
1. Mount the control box in a convenient
location.
2. Attach a solid earth ground wire to the
ground screw.
3. Route connecting wires from the first ice
maker junction box
(marked condenser fan) and connect it to the
KCMR230 terminal strip marked: NO. 1 ICE
MACHINE.
4. Route connecting wires from the second
machine junction box
(marked condenser fan) and connect it to the
KCMR230 terminal strip marked: NO. 2 ICE
MACHINE.
5. Route connecting wires from KCMR230
terminal strip marked: TO REMOTE FAN and
connect at the remote condenser junction box.
POSSIBLE LOCATION
FOR KCM230
CONTROL BOX
December, 1988
Page 11
NM650R
FOR THE ELECTRICIAN: Fan Relay Kit Phasing (Do After Start Up)
Only for 230 volt icemakers and 230 volt condenser.
6. Check phasing of the electrical circuit as
follows:
A. The phasing of the wiring MUST now be
checked, as incorrect phasing will result in a
failure of the kit relay.
Below is an illustration of the KCMR230
terminal strip. Note that each terminal is
marked: 1-2-3-4-5-6. For proper phasing:
Terminals #1 and #3 must be connected to
the same side of the line (such as L1)
Terminals #2 and #4 must be connected to
the same side of the line (such as L2).
B. Make a test with a volt meter as follows:
1. Switch on icemaker #1 first, then switch on
icemaker #2.
(The compressors must be operating for this
test. Do this after start up.)
2. Test with a volt meter between terminals
#2 and #4, then between terminals #1 and #3.
Compare the readings obtained to the ones in
the following list:
C. Test terminals 1-2 = Full Voltage (208-230)
Test terminals 1-3 = No voltage
Test terminals 2-3 = Full Voltage
Test terminals 2-4 = No voltage
Test terminals 3-4 = Full voltage
Test terminals 1-4 = Full voltage
D. If there is full voltage where there should
be no voltage, turn off icemaker #2, (both
switches) Then turn off icemaker #1 (both
switches). The connections at the KCMR230
terminal strip marked icemaker #1 must be
reversed (put the wire that was on 1 on 2 and
the wire that was on 2 on 1).
///////////////////////////WARNING/////////////////////////////
Do all wiring with the electrical power
disconnected.
////////////////////////////////////////////////////////////////////////
December, 1988
Page 12
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