Scotsman CME500R Manuel de service
INTRODUCTION
CME500R
To the owner or user: This service manual 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 CME500R uses HP62 as the refrigerant, and
polyolester oil for compressor lubrication.
Table of Contents
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FOR THE INSTALLER: Coupling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
FINAL CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
COMPONENT DESCRIPTION: Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
COMPONENT DESCRIPTION: Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
FREEZING CYCLE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
HARVEST CYCLE - HOT GAS BYPASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CLEANING & SANITIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SERVICE DIAGNOSIS: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE DIAGNOSIS: Electrical and/or
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SERVICE DIAGNOSIS: Refrigeration and/or
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REFRIGERATION SERVICE: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Parts Lists and Wiring Diagrams are located in
the center of this manual, printed on yellow
paper.
October 1994
Page 1
CME500R
FOR THE INSTALLER
The CME500R will fit the f ollowing Scotsman ice
storag e bin s:
••*BH550
••*HTB500, HTB350, HTB250
••BH800 (with bin top KBT23)
••BH900 (with bin top KTB22)
••BH1360
It will also fit these Scotsman Dis pensers:
••CD200
••IS150 (with adapter kit KADCM1)
••RS150 (with adapter kit KADCM1)
*These smaller bins are recommended.
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. S . A.
Scotsman assu mes no liability or res po nsib ility of
any kind f o r prod ucts manufact ure d b y Scot s ma n
that have been altered in any way, including the
use of any par ts and/or other components not
specifically approved by Scotsman.
A remote condense r and precha rge d tubing kit are
required to asse mb le this ice syst em.
The normal finish for the machine is enamel. An
optional stainle ss ste el pane l kit (SP KCMD-1 ) can
be field installed . It contains a stainless steel top,
side panels, service panels , and front pane l.
Scotsman rese rv es th e right to mak e design
changes and/or imp ro vements at any time .
Specifications and designs are subject to cha nge
without notice.
Model Number Dimensions
(without bin)
W" x D" x H"
CME500RE-1A 30" X 24" X 27" 115/60/1 HP62
* Minimum Circuit Ampacit y is used to determine wire size and type per the Natio nal Elect ric Code .
** The unit is shipped with the full charge in the re ceiver. For re-chargin g purposes, if th e nameplat e charg e
is different than this number, go by the nameplate.
*** Or HACR type circuit break e r s .
Use Scotsman remote condens er RCE501-1A. or
ERC101-1A.
Use precharged tubing kit
•• RTE25 (25’) or RTE40 (40")
The condenser and the tubing kit both contain a
small charge of refrige rant that matche s the ice
maker’s refrigerant type.
Basic
Electri cal
Refrigerant
Type
(R-404A)
Minimum
Circuit
Ampacity*
20 20 208 oz. Remote Air
O perating Limitations ( except remote condens er)
Air Temperature 50
Water Temperature 40
Water Pressure 20 psi 80 psi
Voltage -10% +10%
Maximum
Fu se
Size***
MINIMUM MAXIMUM
Refrigerant
Charge**
HP62
0
F. 1000F.
0
F. 1000F.
Condenser
Type
This ice system (except remote condenser) is
designed to be installe d ind oor s , in a controlled
environment .
Decem ber 1995
Page 2
Installation
CME500R
Water
The water supply for this ice machine has been in
contact with many materials since it fell from the
sky as rain. All rain is slightly acidic, and tends to
dissolve the materials it comes in contact with.
During water’s journey to the ice machine, it has
flowed over and through the ground, been picked
up by a municipal or private pump, forced through
a series of pipes of differing construction and may
have been treated by the municipality providing
the water.
The water supplied to this ice machine will then
contain a variety of substances that will likely show
up as solids during the ice making process. These
solids are similar to those found when water is
boiled out of a saucepan. Only the water boils
away, and the minerals that were in the water
solidify in the pan. During ice making only the
water is frozen into ice, the minerals stay behind in
the reservoir. This machine dilutes the water in the
reservoir every cycle to minimize the amount of
minerals in the water system, but after time the
minerals will appear and have to be dissolved by
ice machine cleaner, then flushed away during the
cleaning process.
Space is required for service access at the sides
and utility connections at the back. 6 inch
clearance is recommended.
The ice machine is not designed for outdoor
use. It must be installed indoors, in a
controlled environment. The air and water
temperatures must not exceed rated limits.
Pre-installation:
1. Inspect the place where the ice machine is to be
installed. Check for:
••space for the cabinet,
••water supply,
••drain availability
••and electrical power supply.
No extension cords are allowed. The building drain
inlet must be lower than the drain outlet of the ice
bin. The water supply must have a hand shut off
valve accessible when the unit is installed.
An ice machine is a food manufacturing plant; it
takes a raw material, in this case water, and
transforms it into a food product, ice. The purity of
the water is very important in obtaining pure ice
and in maximizing product life.
The water to the ice machine should be filtered.
Water filters vary greatly in ability and function.
Install one that filters out suspended solids to a
dimension of 5 microns or less. The finer the filter
the better, but finer filters may plug-up sooner than
course ones. It may be necessary to add a course
filter ahead of the fine filter to prolong filter life.
Even though there isn’t one filter that will cure all
water problems, a good filter combined with a
polyphosphate feeder gives about the best overall
performance.
Have the water tested. Acidic water or alkaline
water will both cause corrosion. Dissolved solids
cannot be filtered out. Check with a water
treatment specialist regarding testing, treatment
and filters.
October 1994
Page 3
Reservoir
Bin Thermostat
Installation
CME500R
Installation
Assembly:
1. Attach the legs, or optional casters, onto the ice
storage bin. Units that are stacked should only use
legs, not casters.
2. Place the ice machine onto the storage bin.
3. Line up the ice machine, check that there is a
good seal between the ice machine and the
storage bin.
4. If on a Scotsman bin, attach the ice machine to
the bin using the straps and bolts shipped with the
ice machine. If on another brand bin, follow the
directions included with that bin.
Bin Thermostat Installation:
1. Remove rubber cap from the end of the
thermostat bracket.
2. Attach the bin thermostat bracket to the bottom
of the ice machine using the thumb screws
provided. There are pre-drilled and tapped holes
located just behind the cube drop area. The end of
the bin thermostat bracket with the plastic tubing
on it will fit into the hole in the base of the machine.
3. Locate and uncoil a portion of the bin thermostat
capillary tube. Route the end of the capillary tube
into and through the bin thermostat bracket tube. It
should be inserted the full length of the tube, but
not past the end.
Thermostat
Capillary Tube
Bin Thermostat
Bracket
Stacking
Stacking:
This machine will stack onto any CM250,
CME250, CM450, CM500, CME500, CM650 or
CME650 with the same cabinet depth (24").
Note: Stacking requires two remote condensers.
1. Remove and discard the top panel from the
lower unit.
2. Carefully lift the uncrated top unit onto the
bottom unit. Use of a mechanical lift is
recommended for this step.
3. Align the two ice maker cabinets.
4. Secure the top unit to the bottom one with the
hardware and straps shipped with the upper
machine.
5. Locate and uncoil all of the bin thermostat
capillary tube.
6. Route the bin thermostat capillary tube from the
upper unit, through the hole in the back of the
reservoir, through the lower unit and into the bin
thermostat bracket. Discard upper unit bracket.
March 1994
Page 4
Strap
Bin Thermostat Bracket
Capillary Tube
Routing Hole
FOR THE INSTALLER: Remote Condenser
CME500R
Locate the condenser as near as possible to
the interior location of the ice maker.
Location of the condenser is limited by the specific
length of precharged refrigerant tubing supplied for
the application. The pre-charged tubing connects
the icemaker to the remote condenser. The
condenser must be above the ice maker.
Select the best available location, protecting the
condenser from extremes 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.
Remote
Condenser
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 instructions.
////////////////////////////////////////////////////////////////////////////////
1. Each set of precharged refrigerant lines 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, the end without
access valves goes to the icemaker.
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 1.75". 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.
////////////////////////////////////////////////////////////////////////////////
Locate Condenser No
Lower Than Ice Machine
TYPICAL
INSTALLATION
Excess
Tubing
Inside
Building
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 any excess length of pre charged tubing
inside the building. Use a horizontal spiral (as
illustrated) to avoid any traps in the lines.
Note: Spiral need not be as tight as illustrated.
5. Have the roofing contractor seal the holes in the
roof per local codes.
October 1994
Page 5
Discharge Line
Insulation
CME500R
FOR THE INSTALLER: Coupling Instructions
////////////////////////////////CAUTION/////////////////////////////////
The couplings on the sets of precharged lines are
self sealing when installed properly. 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.
••The 1/2 inch discharge line (schrader valve
end) goes to the remote condenser fitting
marked “discharge line”.
••The 3/8 inch liquid line (schrader valve end)
goes to the remote condenser fitting marked
“liquid line”.
Final Connections:
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.
TIGHTENING THE QUICK CONNECTS
Schrader
Valves
••The 1/2 inch discharge line goes to the
icemaker fitting marked “discharge line”.
••The 3/8 inch liquid line goes to the icemaker
fitting marked “liquid line.”
Liquid Line
Ice Maker Connections
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.
Note: The system charge is contained in the
receiver tank of the ice machine. Only "holding"
charges are present in the "precharged" tubing or
the condenser.
March 1994
Page 6
FOR THE ELECTRICIAN
HAND
DISCONNECT
SWITCH
CME500R
SEE NAMEPLATE for current requirements to
determine wire size to be used for electrical
hookup. When the cuber and the remote
condenser are connected, each must be grounded
to the other using the ground screws provided in
the respective junction boxes. The cuber then
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
icemaker.
ELECTRICAL CONNECTIONS
The remote condenser is designed to be powered
from the ice machine. There is a separate
electrical junction box at the back of the ice maker
for the remote condenser. Wire the remote
condenser to the ice maker in accordance with
local and national electric codes. All outdoor wiring
must be in rain proof conduit.
The condenser fan motor will run whenever the
compressor is running.
Electrical connections are made at the rear of
the icemaker, inside the junction box.
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 CONNECTION
INTERCONNECTING
WIRES
October 1994
Page 7
3/8" Male
Flare
CME500R
FOR THE PLUMBER
The recommended water supply line is a 3/8-inch
O.D. copper 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.
Water Limitations:
An ice machine is a food manufacturing plant, it
takes in 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. Even though there isn’t one filter that
will cure all water problems, a good filter combined
with a polyphosphate feeder gives about the best
overall performance.
DRAIN
Connections: All drains are gravity type and must
have a minimum of 1/4-inch fall per foot on
horizontal runs. The drains to be installed to
conform with the local plumbing code. Install a
vertical open vent on drain line high point to insure
good draining. The ideal drain receptacle is a
trapped and vented floor drain. Recommended bin
drain is 5/8 inch O.D. copper tubing and should be
vented and run separately. Insulation for high
humidity areas is recommended.
The ice machine sump drain is 3/4" FPT. There
must be a vent at this connection for proper sump
draining.
Potable
Water
Supply
Hand Shut
Off Valve
Maintain The Code
Required Air Gap
Between Drain Lines
And Building Drain
Optional
Filter
BIN DRAIN
Note: Some
Bins Drain Out
The Bottom
Sump Drain Must
Be Vented
3/4" FPT
Vent
WATER SUPPLY AND DRAIN CONNECTION
March 1994
Page 8
FINAL CHECK LIST
1. Is the cabinet in a room where ambient
temperatures are within the minimum and
maximum temperatures specified?
2. Is there clearance at the left and back sides of
the cabinet for service access?
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. Check that the bin
thermostat bracket has been
installed, and the bin
thermostat capillary tube has
been routed thru the bracket.
7. Have all electrical, water and
drain connections been made?
CME500R
FINAL INSTALLATION
LEVEL
ASSEMBLY
8. Is the water supply line shut
off valve installed and electrical
wiring properly connected?
9. Check all refrigerant lines
and conduit lines, to guard
against vibration or rubbing and
possible failure.
10. Have the bin and cabinet
been wiped clean?
11. Has the Manufacturers
Registration form been properly
filled out? Check for correct
model and serial numbers from
Serial nameplate, then mail to
the SCOTSMAN factory.
12. Has the owner/user been
given the Service Manual and
instructed how to operate and
maintain the icemaker?
13. Has the owner been given
the name and telephone
number of the authorized
SCOTSMAN Service Agency
serving him?
PRECHARGED
LINES
CONNECTED
OPTIONAL
FILTER
HAND SHUT
OFF VALVE
SUMP
DRAIN
BIN
DRAIN
October 1994
Page 9
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