Scotsman CME1856W Owner’s Manual

Introduction

CME1856W

This product manual contains the information needed for the setup, installation, initial start up, sanitation and maintenance of this ice machine. Keep it for future reference.

This machine incorporates advanced technology, including a scroll compressor.

Be certain that the information applies to the model in question. If no model is listed, the information applies to all models.

TABLE OF CONTENTS

Specifications ············ PAGE2

Ice Machine Layouts ········· PAGE3

Pre-Installation ············ PAGE4

Location & Assembly ········ PAGE5

Bin Control: Installation ······· PAGE6

Bin Control ·············· PAGE7

For The Installer: ·········· PAGE8

Electrical ··············· PAGE9

Plumbing ··············· PAGE10

Stacking Kit - KSCME6-LG-B ···· PAGE11

Stacking ··············· PAGE12

After Utility Connections ······· PAGE13

This manual is organized in the same way as the expected use of the machine, it begins with specifications, goes thru unpacking and setup, shows where everything is; continues with initial start up, then describes how it works. After that is the sanitation section, followed by service diagnosis and repair.

All Scotsman CM3models, like this one, feature Scotsman’s AutoIQ™ control system and ReliaClean™ water system cleaning process.

Additional Maintenance ······· PAGE25

Additional Maintenance: Water Distributors

···················· PAGE26

Additional Maintenance: Inlet Water Valve Screen

····················PAGE27

Additional Maintenance: Ice Sensors, Condenser

···················· PAGE28

Service Diagnosis: Diagnostic Light Analysis

···················· PAGE29

Service Diagnosis ·········· PAGE30

Service Diagnosis: Components · · · PAGE 31

Service Diagnosis ·········· PAGE32

Operational Characteristics: CME1856W

···················· PAGE33

Component Location and Function · PAGE 14

System Controller ·········· PAGE15

Initial Start Up ············ PAGE16

Adjustments ············· PAGE17

How To Operate The Controller · · · PAGE 18

How The Electronic Cuber Works · · PAGE 19

How The Electronic Cuber Works · · PAGE 20

Startup: Three Phase Compressor · PAGE 21

Technicians Only: Freeze Cycle Sequence

···················· PAGE22

Technicians Only: Harvest Cycle Sequence & Other Notes ············· PAGE23

Sanitation and Cleaning ······· PAGE24

Printed on recycled paper.

November 2001

Suction Pressure ·········· PAGE34

Removal and Replacement ····· PAGE35

Removal and Replacement ····· PAGE36

Controller Features & Last Error Recall

···················· PAGE37

Removal and Replacement: System Controller

···················· PAGE38

Removal and Replacement: ···· PAGE39

Removal and Replacement ····· PAGE40

Refrigerant ·············· PAGE41

Liquid Charging ··········· PAGE42

Before Calling for Service ······ PAGE43

Index ················· PAGE44

Service parts list & wiring diagrams located

in the middle of this manual.

Page 1

CME1856W

Specifications

This ice machine is designed to be installed indoors, in a controlled environment. While it can operate satisfactorily under a wide variety of conditions, do NOT operate the machine in temperatures it has not been designed for. Do NOT operate the machine above or below the voltage limits for the particular model. Do NOT operate the machine with too little or too much water pressure.

Operational Limits

Minimum Maximum

Air Temperature 50oF. 100oF.

Potable Water Supply Temperature

Condenser Water Inlet Temperature

Water Pressure 20 psi 80 psi

Voltage (60 Hz) 197 253

Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and designs are subject to change without notice.

40oF. 100oF.

Bins:

All models will fit a standard, 48" wide or wider open top Scotsman Ice Storage Bin. Some examples are:

BH900

•

BH1370

•

BH1356

•

BH1650

•

BH1000 (requires kit KBT21)

•

In addition, there may be other bins that can be used, check Scotsman’s sales literature for application information.

Note: Slope-front bins must have an internal baffle. Scotsman BH900 and BH1000 have the required baffle. Baffle must be approximately in the position shown in the diagram below.

Baffle

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.

BASIC INFORMATION

Model Number Dimensions

WxDxH

(w/o bin)

CME1856WS-32 48½“x24"x28” 208-230/60/1

CME1856WS-3 same 208-230/60/3

*Condenser only @90/70

Basic Electrical (volts/Hz/phase)

12.0"

Side View

Condenser Water Supply

GPH 107* 60 30 40

GPH 107* 60 20 30

Refrigerant Charge R-404A

Minimum Circuit Ampacity

Maximum Fuse Size

4.0"

If the numbers on the nameplate are different than the above, use the nameplate’s information.

The stacking kit required to place two like model cubers together is: KSCME6-LG-B.

November 2001

Page 2

Ice Machine Layouts

CME1856W

November 2001

Page 3

CME1856W

Pre-Installation

Other Applications:

Check sales literature for additional information.

Electrical:

Check the nameplate for electrical requirements. The nameplate is located on the back of the ice machine. If the information on the nameplate is different from other published information, go by the nameplate data.

While the model and serial number are on the nameplate, a serial number plate is located at the front of the machine, behind the left front panel and to the right of the purge valve.

Nameplate

Serial Number Plate

Water:

There is no such thing as pure water. All water contains some impurities. There are two ways water carries the impurities: suspended and dissolved. Suspended solids can be filtered out. Dissolved solids must be diluted or treated. Water filters are recommended to remove suspended solids. Some filters have treatment in them for suspended solids. Check with a water treatment service for a recommendation.

Cube Ice machines use more water than what ends up in the bin as ice. While most water is used during ice making, a portion is designed to “rinse" out the water system to keep hard water scale from clogging up the machine. That water rinse, combined with water filters, prolongs the times between needed water system cleaning.

Service Technicians come set from the factory with at a “Standard” water rinse. Standard water rinse is designed to be compatible with typical water conditions. The ReliaClean™ water system provides an adjustment method so the amount of water rinsed out of the machine per cycle can be changed. If the prior ice machine worked acceptably well with the local water conditions, leave the machine at the factory setting. If severe water conditions are present, and water filters do not solve the problem acceptably, adjust the machine to use more water. If water conditions are excellent, adjust the machine to use less water. See the Adjustments section.

: All models covered here

Note: Water use adjustments are customer convenience adjustments; they are NOT factory defects and are NOT covered by warranty.

November 2001

Page 4

Location & Assembly

CME1856W

Locate the ice machine indoors. A 6 inch minimum clearance on the back and left sides is required for the proper operation and service of this machine.

Unpacking and Assembly:

Begin with unpacking the ice storage bin. Remove the carton, and using part of the carton as a cushion, tip the bin on its back to remove the skid and attach the legs or casters. Note: Stacked

applications may not use casters.

Return the bin to an upright position. Check the bin top gasket for gaps and tears, fill any in with food grade sealant prior to placing the ice machine on the bin.

Note: If recycling a prior bin, be sure that the bin top gasket is in good condition or seal the ice machine to the bin with food grade sealant.

Level the top edge of the bin front to back and left to right.

If the ice machine has not been unpacked, do so now. Remove the carton from the skid. Remove shipping straps.

Cabinet Panel Removal:

1. Remove the front panel by removing the two screws connecting the front panel to the machine.

2. Lift up at the front edge and push the top panel back until it releases from the tabs connecting it to the back panel.

Remove the front and left panels. Remove the compressor shipping brackets and all packaging materials.

After all packing materials have been removed from the ice machine, lift or hoist the machine onto the bin. Align the sides and back of the machine with the sides and back of the bin.

Secure the ice machine to the bin with the two metal straps and 4 bolts provided.

3. Remove two screws at the front of each side panel, and pull them forward until they release from the tabs connecting them to the back panel.

Evaporator Cover:

To Remove

Evaporator Cover:

Push Up and Tilt Out

November 2003

Page 5

CME1856W

Bin Control: Installation

The bin control is a thermostat. It must be field installed after the ice machine has been placed on the bin.

Before starting, remove the left front panel and any baffle in the bin.

1. Locate bin thermostat bulb.

2. Route bulb thru routing tube (located between the compressor and the reservoir).

3. Locate bin thermostat bracket.

4. Carefully position the thermostat bulb on the bracket (see the diagram on the next page).

5. Fasten the bracket to the bottom of the ice machine with the two 3-pronged knobs supplied with the unit.

6. Pull back into the ice machine any excess capillary tubing.

7. Return the baffle to the bin and continue with the installation.

Note: If the machine is located at an altitude higher than 2,000 ft., adjust the thermostat by removing the plastic cover and rotating the adjustment screw per the table.

Bin Thermostat Altitude Correction Table

CW Turns of Range Screw (under plastic cover)

Feet Turns Feet Turns

2000 55

4000 160

6000 250

8000 340

9000 385

10000 405

Use This Table to Adjust Thermostat

Bin

Thermostat

Body

Bin Thermostat Bulb

Thermostat Bulb

Routing Tube

Route Bin Thermostat Bulb Into Bin

November 2001

Page 6

Bin Control

Bin Thermostat

Bracket

CME1856W

Bin Thermostat Capillary Tube

Mount Bulb Here

Minimize Excess

Tube in Bin

Attach Thermostat Bulb to Bracket

Three-Pronged Knob

Thermostat and

Bracket

Attach Bracket to Bottom of Ice Machine

November 2001

Page 7

CME1856W

For The Installer:

Cooling Tower Applications:

This unit requires no special modifications for use on a cooling tower. However, the sizing of the cooling tower requires the heat of rejection and the pressure drop across the ice machine’s water cooling circuit (water regulating valve and condenser).

Heat of Rejection: 27,400 BTUH - Peak

Pressure Drop: 7 psi

Maximum water temp into condenser: 110oF.

Peak GPM at 110oF:9-10

GPH at 110/100: 372

GPH at 90/70: 107

GPH at 70/50: 59

October 2001

Page 8

Electrical

CME1856W

All models must be installed with the correct wire size and type per the National Electric Code. Locate the nameplate on the back of the cabinet and find the numbers for Voltage, Phase, Minimum Circuit Ampacity and Maximum Fuse Size. Either fuses or HACR type circuit breakers may be used.

The ice maker is designed to operate on its own electrical circuit and must be individually fused. Voltage variation must not exceed the limits listed on page 2.

Electrical connections are made in the junction box in the back of the cabinet.

1. Remove the junction box cover.

2. Knock out one hole for a field supplied strain relief.

3. Install wires and strain relief per code.

4. Connect to wires and secure ground wire to ground screw inside junction box.

All external wiring should conform to the national, state and local electrical code requirements. Usually an electrical permit and the services of a licensed electrician will be required.

November 2001

Page 9

CME1856W

Plumbing

All models require an adequate potable water supply, a condenser water supply and a gravity drain. The recommendations for tubing are:

All Drain Tubing Material must be RIGID. Flexible tubing will eventually kink and cause a restricted drain.

Potable water supply to be

•

Condenser water supply to be ½" OD.

•

Reservoir drain to be

•

Condenser drain to be ½” OD, non vented

•

" OD.

" OD and vented

Note: When replacing a prior ice machine, do not take a short cut and reuse the old inlet and drain system. INSTALL A NEW SYSTEM.

Supply:

All models have 1 potable water supply connection,

" male flare at the back of the cabinet. Connect

to cold potable water that has adequate pressure.

Note: Using water supply tubing smaller than

will cause severe operational issues.

The water cooled condenser requires an additional supply line.

Water Filters:

The water filters must flow at least 2.7 GPM or they will cause severe operational issues. Check with the filter manufacturer. When replacing a prior ice machine, do NOT assume that the water flow capacity of the filter will be adequate. Filtering the condenser water supply is not recommended.

Drain:

Connect a

" drain tube to the reservoir drain

fitting at the back of the cabinet. Use only RIGID TUBING. Flexible tubing may be easily kinked or become cracked.

The reservoir drain tube must be vented at the back of the cabinet. Use an 18" high vent.

Connect a ½” drain tube to the condenser drain at the back of the cabinet. Do not vent this drain.

The ice storage bin will have a drain out the back or base, depending upon the model.

The drains for the ice machine and the ice storage bin must be SEPARATE or the ice machine’s drain water may run into the bin and MELT THE ICE.

Insulation is recommended for the ice machine reservoir and bin drains.

Follow all applicable codes

November 2001

Page 10

Stacking Kit - KSCME6-LG-B

CME1856W

Only like models may be stacked. Begin after the bottom unit has been placed on the ice storage bin and secured. Stacking requires heavy duty leg kits. Casters are NOT recommended.

Note: Instructions are for either model.

Bottom Machine:

1. Remove front panel, left side panel, and top panel.

2. Remove & discard top cover from over the freezing compartment.

3. Install gasket materials to freezing compartment:

Cut about 22" of gasket material from the roll in the kit. Apply it to the back side top edge of the freezing compartment.

Cut two lengths of gasket material to fit the right side top edge of the freezing compartment and apply them.

4. Place a bead of food grade sealant to the top of the back wall’s gasket.

5. Place the shield bracket (has a large hole in the center) from the kit over the center of the freezing compartment.

Insert the tabs of the bracket into slots on the back of the unit.

6. Secure bracket at the front with screws from the kit.

7. Hang the plastic shields from the bracket installed in the prior step. Use the slots in the shields to hang them from the stainless steel hooks.

Note: The notch in the bottom of the shield goes to the front.

11. Remove two existing screws and secure the bracket to the: freezing compartment, back panel and front channel with the 2 existing screws and 1 large and 4 small screws from the kit.

Both Machines:

12. Place the top ice machine onto the bottom one. Secure together with hardware from the top machine. Remove left front and left side panels.

13. At the back of the ice machines, on the compressor end, remove the upper knock-out from the bottom machine and the lower knock out from the upper machine.

14. Place a strain relief (from the kit) into each hole.

15. Insert wire harness from kit thru strain-relief and hole in upper corner of the lower ice machine’s back panel.

NOTE: Harness is marked which end goes to which machine.

Bottom Machine:

16. Remove harness from controller terminal 7 and bin thermostat.

17. Route wire harness in lower ice machine to the controller. Connect to terminal #7. Plug the two free wires onto the thermostat terminals #1 and #2.

18. Return left side panel to its original position on the lower ice machine.

Top Machine:

19. Remove harness from controller terminal 7.

20. Route wire harness thru upper unit’s lower knock-out hole and strain relief and continue internally to the controller. Plug wire onto terminal 7 of the controller.

Note: The tabs on the shields must fit inside the ice outlet port.

8. Check the position of the shields. They must move freely and be vertical.

Note: The suction line may need to be moved slightly so the tubing clears the bracket & shields.

9. Place a bead of food grade sealant onto the top left edge of the freezing compartment.

10. Install the front-to-back support bracket over the left edge of the freezing compartment.

November 2001

Page 11

21. Return all panels and covers to their normal positions.

22. Complete the balance of the installation.

Service Notes:

A. The shields must be positioned so they hang vertically and move freely left to right. Their purpose is to guide the ice past the bottom machine’s evaporators and into its cube port.

B. The drain lines from each ice machine must be kept separate.

CME1856W

Stacking

Gasket on Plastic

Walls of Lower Unit

Gasket for Metal

Edges of Bottom

Unit

Front-to-Back

Support Bracket

Mounting Straps

and Hardware

Shield Hanger

Bracket

Shield

November 2001

Page 12

After Utility Connections

1. Wash out the bin. If desired, the interior of the bin could be sanitized.

2. Locate the ice scoop (if supplied) and have it available for use when needed.

3. Go thru the final check list (below).

Final Check List:

___ 1. Is the unit located indoors in a

controlled environment?

___ 2. Has all the plastic covering the panels

been removed?

___ 3. Has the correct electrical power

(voltage and phase) been supplied to the machine?

___ 4. Have all the water supply connections

been properly made with the correct size tubing?

CME1856W

___ 5. Have all the drain connections been

properly made?

___ 6. Has the unit been leveled? Level the

unit at the bin.

___ 7. Have all unpacking materials been

removed?

___ 8. Is the water pressure adequate?

___ 9. Is the machine secured to the ice

storage bin?

___ 10. Is the bin control system been properly

installed?

___ 11. Have the drain connections been

checked for leaks?

___ 12. Has the bin interior been wiped clean or

sanitized?

___ 13. Have any water filter cartridges been

replaced?

___ 14. Check all refrigerant lines and conduit

lines, for vibration or rubbing and possible failure. Adjust as needed.

___ 15. Proceed to Initial Start Up.

November 2001

Page 13

CME1856W

Component Location and Function

Reservoir: Contains the water used to make ice.

Water Inlet Valve: Opens to allow water into the

reservoir.

Evaporators/Freezing Compartment: Location of the evaporators. Ice forms on the evaporators and is released when warmed up during the harvest cycle. The freezing compartment is fully insulated for maximum efficiency.

Cube Deflectors: The slots in the inclined deflectors let the water falling from the evaporators back into the reservoir, but when ice falls during harvest, the ice slides off into the bin.

Water Pump: Forces the water from the reservoir to the top of the evaporators. The motor is kept separate from the water to minimize contact with moisture.

Hot Gas Valve: Closed during freeze, it opens during harvest to divert hot discharge refrigerant gas into the inlet of the evaporators.

Purge Valve: Opens during the first part of harvest, when the water pump restarts the water in the reservoir is diverted to the drain.

Water Cooled Condenser: A counter-flow cupro-nickel condenser. Supply water is heated by refrigerant gas until the gas condenses.

Water Regulating Valve. Controls the amount of water flowing into the condenser to maintain a constant discharge pressure during the Freeze cycle.

November 2001

Page 14

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