Scotsman SCE275 Owner’s Manual

Introduction

SCE275

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 repair this product.

The SCE275 is an ice machine that produces cubed ice on a vertical freezing surface. The cubes fall into the ice storage bin where they break up into individual cubes.

Table of Contents

Specifications ···········································2 For The Installer: Environmental Limitations ···························3 Installation ·············································4 Installation ·············································5 For The Plumber··········································6 Installation ·············································7 Removal of the Cabinet ······································8 Component Location ·······································9 Component Description ······································10 AutoIQ Controller ·········································11 Initial Start Up ···········································12 Notes On Operation ········································13 Adjustments ············································14 How To Operate The AutoIQ Controller ······························15 How The Electronic Cuber Works ·································16 Water System ···········································17 Technicians Only: Freeze Cycle Operational Sequence ·····················18 Technicians Only: Harvest Cycle Operational Sequence ·····················19 Sanitizing and Water System Cleaning ······························20 Sanitizing and Cleaning ······································21 Additional Maintenance ······································22 Additional Maintenance ······································23 Additional Maintenance: Bin Controls ·······························24 Technical Characteristics ·····································25 Service Diagnosis ·········································26 Service Diagnosis ·········································27 Service Diagnosis ·········································28 PTCR ···············································29 Removal and Replacement: AutoIQ Controller ··························30 Removal and Replacement: Water Pump, Water Level Sensor ··················31 Removal and Replacement: Inlet Valve & Water Trough ·····················32 Removal and Replacement: Bin Control Set ···························33 Removal and Replacement: Thermistors ·····························34 Water Distributors ·········································35 Refrigeration System Service: R-404A ······························36

This manual was printed on recycled paper.

January 2003

The SCE275 automatically maintains the level of ice by turning on when the ice level falls, and switches off when the bin is full.

This unit is serviceable in place; the ice storage bin and hood may be removed from the chassis to allow service access without removing the ice machine from its installed position. The refrigeration system uses R-404A as the refrigerant.

Parts lists and wiring diagrams are located in the center of this manual.

Page 1

SCE275

Specifications

4.00 IN.

10.16 CM. MINIMUM UTILI TY CLEARANCE

6.00 IN

15.2 CM.

The unit is equipped with an electrical power cord, but should only be plugged into a circuit dedicated to the ice machine.

THE NAMEPLATE IS LOCATED

ON THE BACK PANEL

A Serial Number Plate is Located

on the Front Edge of the Base,

Behind the Right Front Grill

4.59 IN.

11. 66 CM .

WATER REGULATOR 3/8-18 NPT (W/C ONLY)

3.68 IN.

9.35 CM.

4.06 IN.

10.31 CM.

1.68 IN.

4.27 CM.

BACK VIEW

ELECTRICAL CORD

7.17 IN.

18.21 CM.

9.12 IN.

23.16 CM.

11. 35 IN .

28.83 CM.

POTABLE WATER INLET 3/8 FLARE

3/4 FPT DRAIN

COND DRAIN 1/2-13 NPT (W/C ONLY)

AutoIQ Controller

Controller Location in G

Model Number Dimensions

(w/o) legs H"xW"xD"

SCE275A-1G 33 x 30

x 30 115/60/1 Air 15 18 ounces

Series and Higher

Basic Electrical

Condenser Type

Total Load Amps

Total Unit Wattage

Refrigerant R-404A (HP62)

Grill in A thru F

SCE275A-32G 33 x 30¼ x 30 208-230/60/1 Air 8.4 18 ounces

SCE275W-1G 33 x 30

SCE275A-6G 33 x 30

SCE275W-6G 33 x 30

x 30 115/60/1 Water 15 12 ounces

x 30 230/50/1 Air 7.5 1725 18 ounces

x 30 230/50/1 Water 7.5 1725 12 ounces

January 2003

Page 2

(Behind Right

Series)

For The Installer: Environmental Limitations

The ice machine must be installed indoors in a controlled environment.

Min Max

Air Temp 50

Water Temp 40

Water Pressure 20 PSI 80 PSI

Voltage (60 Hz) 103.5 126.5

Voltage (50 Hz) 207 253

F. 1000F.

SCE275

Air In

Operating the ice machine outside of the above limitations, or outdoors, is potentially damaging to the machine, and it is misuse of the machine. This may void the warranty.

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.

January 2003

Air Out

Airflow on air cooled models is:

Intake through the left front grill.

Exhaust through the right front grill.

Do not install where this air flow is obstructed.

The SCE275 has a removable cabinet. When installed, the machine should have some extra

clearance (

") on the left and right sides so that the

cabinet may be easily removed when the machine is in place.

Page 3

SCE275

Installation

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.

This means that there is no such thing as “pure” water. All water contains some level of impurity. There are two ways water carries the impurities: suspended and dissolved. Water filters can remove the suspended solids, but cannot remove the dissolved portion.

Cube ice machines use more water than is made into ice, the excess amount is used to dilute the concentration of minerals and “rinse” out the water system to keep the water scale from clogging up the machine. That water rinse, combined with water filters, prolongs the times between needed water system cleanings.

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.

Electrical power is supplied through a cord connected to the unit. All local codes must be followed.

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(s) at the back of the ice machine. The water supply must have a hand shut off valve accessible when the unit is installed.

2. Determine the method of installation, is the machine to be installed under the counter? Is the drain in the floor under the machine? Is the water inlet valve accessible?

Unpack and Assemble

1. Remove legs and scoop from storage bin.

2. Remove shipping materials from ice making area.

The SCE275 is factory set for a water purge that will work in most water conditions. While the amount of purge is adjustable, only change it if necessary.

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

This ice machine may be installed in the open or under a counter. No clearance is required at the sides or top beyond what’s needed to place the cabinet into position. Air cooled models blow air in and out through the grills at the front. Space is required for utility connections at the back.

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.

January 2003

Remove Material Located Between

Cube Deflector and Troughs

3. Place corner posts from the shipping carton on the floor behind the ice machine. Tip the ice machine on its back and remove the shipping skid.

4. Screw the legs into the threaded holes in the base of the ice machine.

5. Tip the ice machine back to an upright position.

Page 4

Installation

SCE275

For The Plumber

Begin by planning the installation and obtaining the needed supplies:

" soft copper tubing

" rigid drain tubing

" FPT fitting for bin/reservoir drain connection

" FPT fitting for condenser drain connection

" FPT fitting for water cooled condenser inlet

connection

1. Connect cold potable water to the

" male flare

at the back of the cabinet. A water filter and hand shut off valve is recommended. Flush the water line prior to connecting to the ice machine.

If water cooled, connect a separate water inlet line to the water cooled condenser inlet fitting. It should also have a hand shut off valve.

Plumbing Connections,

Water Cooled Shown

A loop of copper tubing may be used between the ice machine and the water supply. This will allow the ice machine to be pulled out from its installed location without disconnecting the water line. No back-flow preventer should be needed in the inlet potable water line because provision for that is incorporated in this N.S.F. listed product (the water valve outlet is above the reservoir wall and cannot siphon).

2. Connect a drain tube to each drain connection (water cooled drain must be separate).

3. Route the drain tubes to the building drain receptacle.

CONFORM TO ALL LOCAL CODES

Water Cooled Inlet

Water Cooled Drain

Reservoir & Bin

Drain

Field Supplied Filter

and Hand Valve

Potable Water Inlet

Drain Receptacle

January 2003

Page 5

SCE275

For The Plumber

Drain Configuration:

Water cooled models must use a separate drain tube from the reservoir/bin drain.

The water cooled condenser drain should not be vented.

Drain tube material must be rigid and meet local code.

Traps in the bin drain line without vents ahead of them will cause poor draining.

The bin drain must be vented if there is a long horizontal run (5’ or more).

All drains are gravity, and must have a minimum fall of ¼" per foot of horizontal run.

Maintain the air gap required by local code between the end of the drain tubes and the building drain receptacle.

Note: Drain tubing should be insulated to prevent condensation from forming on the tubing.

Vented Drain

Air Cooled Plumbing

Connections

Potable Water

Supply

January 2003

Page 6

Installation

For The Electrician

The 115 volt, 60 Hz model is a cord-connected unit, and must be on a separate 115 volt AC 60 cycle single phase power supply. The maximum fuse size for this circuit should be 15 amps. Per the nameplate use fuses, or HACR circuit breakers.

Connect 50 Hz models to the correct voltage and fuses.

Follow All Local Codes - This Unit Must Be Grounded. Do not use extension cords and do not

disable or by-pass ground prong on electrical plug.

After Utility Connections:

1. Level the cabinet, use the leg levelers on the end of the legs to adjust the cabinet height. (Legs should have been installed when the unit was unpacked). Check for levelness at the reservoir.

SCE275

2. Wash out the bin and hood. If desired, the interior of the bin could be sanitized.

3. Locate the scoop, wash it and have it available for use when needed.

Final Check List

1. Is the ice maker cabinet in a room where ambient temperatures are within the minimum and maximum temperatures specified?

2. Has the water supply been connected?

3. Is the water pressure adequate?

4. Have the water connections been checked for water leaks?

5. Have the drain connections been made?

6. Have the drain connections been checked for leaks?

7. Is the cabinet level?

8. Is the ice machine plugged into an electrical power supply of the proper voltage and is the ice machine the only load on that circuit?

10. Has the bin and cabinet been wiped clean and sanitized?

11. Has the Customer Evaluation & Warranty Registration form been filled out? Check for correct model and serial numbers from the nameplate, then mail the completed form to Scotsman.

12. Has the owner/user been given the name and telephone number of the authorized Scotsman Service Agency serving that location?

13. To start up machine, follow the directions on page 12. For more information on the unit, turn to the next page.

9. Has all of the shipping material been removed from the inside of the cabinet? Check for

materials between the cube deflector and the water troughs (see page 4). Be sure the cube deflector is in place.

January 2003

Page 7

SCE275

Removal of the Cabinet

One of the most useful features of this ice machine is the ability to remove the cabinet from the ice machine without removing the ice machine from its installed position.

To Remove:

To remove the cabinet base the hood must be removed first.

1. Remove 5 screws and the three grills at the front of the base.

STEP 1

2. Push and hold the Off button the AutoIQ Controller until the machine has switched OFF. Be certain the ice machine has been switched off.

4. Pull the hood and door assembly straight out until it can be lifted up.

STEP 4

5. In the area behind the grills (removed in step 1) are two knobs similar to those removed in step 3.

STEP 5

Hood

STEP 2

Note: Controller on left side of cabinet on G series and higher.

3. Open the bin door and unscrew the knobs at the left and right inside of the ice storage bin. Unscrew the knobs all the way out.

STEP 3

Unscrew and remove the two knobs.

6. Locate the bin drain. Loosen the hose clamp holding the drain tube to its fitting and pull the drain tube off of the fitting.

7. Lift up the front of the base and rotate the base up and off of the ice machine.

Bin Drain

The machine is now exposed for service.

January 2003

Page 8

Component Location

SCE275

The ice machine is designed for front service. Many components are serviceable from the front without removing the cabinet. With the cabinet removed, nearly all components are serviceable.

Water Distributors

Evaporators

Cube Deflector

When the bin is removed, the condensing unit is visible.

Evaporator Cover

Reservoir

Water Trough

Compressor

Water Inlet

Valve

Fan Motors

Component Location

These parts are located inside the bin:

Evaporators

Water Reservoir

Water Pump

Refrigeration

Access Valves

AutoIQ

Controller,

location shown

for A thru F

series

Cube Deflector

Water Troughs

Water Distributors

Water Level Sensor

Controller Location, G series

and higher

January 2003

Page 9

SCE275

Component Description

High Pressure Cut Out - Water Cooled Only

This is a switch that opens to stop the ice machine when the internal refrigeration pressures become too high (over 450 PSIG). It is an automatic reset.

Evaporators

Where the ice is formed. There are two vertical evaporator plates that form vertical strips of cubes. The strips break up into individual cubes as they fall.

Thermostatic Expansion Valve

The thermostatic expansion valve is used to meter liquid refrigerant into the evaporator, adjusting the flow of refrigerant as required to make ice.

Reservoir:

Contains the water used for ice.

Water Inlet Valve:

Opens to allow water into the reservoir.

Water Level Sensor:

Controls the size of the ice cube by measuring how much water is used in a cycle. It consists of a float, stem and electric eye. The stem will move slightly when the pump is on, this is normal. As the machine makes ice the reservoir water level will fall and the visible portion of the stem will slide down thru the slot in the sensor body.

AutoIQ Controller:

Controls the operation of the ice machine. Turns it on and off; switches it between cycles; shows information via indicator lights; and shuts the machine down if there is a problem.

Evaporators/Freezing Compartment:

Location of the 2 evaporators. Ice forms on the evaporators and is released when warmed up during the harvest cycle.

Cube Deflector:

The slots in the inclined deflector 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 Trough

Diverts water from the evaporators to the right and left to keep water off the ice.

Refrigeration Service Access Valves:

Only to be used by a certified technician. Allows access to the refrigeration system for diagnostic information.

Water Pump:

Forces the water from the reservoir to the top of the evaporators. The motor is separated from the reservoir water to minimize contact with the water.

Compressor:

The refrigerant vapor pump, it forces the refrigerant to flow thru the refrigeration system tubing.

Hot Gas Valve:

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

Condenser:

Either air or water cooled, discharges the heat produced in ice making.

January 2003

Page 10

AutoIQ Controller

SCE275

Indicator Lights:

Bin Full: On when bin is full, goes on and off as

ice falls during a harvest cycle.

Freeze: On when the unit is in the Freeze cycle, blinks when a freeze mode is pending.

Harvest: On when the unit is in the Harvest cycle.

Clean: On when the unit is in the Clean cycle, blinks when preparing for a clean mode.

Off: On when the unit has been switched off, blinks when the machine is preparing to shut off.

Water Error: On when the controller has identified a problem with the water system.

Refrigeration Error: On when the controller has identified a problem with the refrigeration system.

Cycle Definitions:

Freeze: The refrigeration system is operating to

remove heat from the evaporators. The compressor, fan motor (if air cooled) and water pump are ON.

Harvest: The refrigeration and water systems are operating to harvest the ice cubes. While the compressor is on for the full cycle, the water pump will be off at the beginning and inlet water valve will switch off before the end.

Clean: The Inlet Water Valve opens to fill the reservoir. The Water Pump starts. The Clean indicator light is switched ON. A manually initiated rinse flushes the system.

PUSH BUTTON

CONTROL SWITCHES

INDICATOR LIGHTS:

BIN FULL

FREEZE

HARVEST

CLEAN

OFF

ERROR LIGHTS:

WATER

REFRIGERATION

January 2003

Page 11

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