Scotsman AFE424A-1 Manuel de service

AFE424

INTRODUCTION

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 AFE424 is an ice machine that produces flaked ice and stores it in a insulated bin. It automatically maintains the level of ice by turning on when the ice level falls and switches off when it is full.

Table of Contents

Specifications ··········································· Page 2

For The Installer: Environmental Limitations ··························· Page 3

Installation: ············································ Page 4

Installation: ············································ Page 5

Installation ············································ Page 6

Removal of the Cabinet ······································ Page 7

Component Location ······································· Page 8

Electrical Sequence ······································· Page 9

This unit in 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 location. The refrigeration system uses R-134a as the refrigerant.

Initial Start Up ··········································· Page 10

Maintenance and Cleaning ···································· Page 11

Maintenance and Cleaning ···································· Page 12

Maintenance and Sanitation ··································· Page 13

Water Schematic ········································· Page 14

Refrigeration Schematic ····································· Page 15

Service Diagnosis: Condition - No Ice Being Produced ····················· Page 16

Service Diagnosis: Condition - No Ice Being Produced ····················· Page 17

Technical Characteristics ····································· Page 18

Removal And Replacement - Bin Thermostat ·························· Page 19

Removal And Replacement - Gearmotor Assembly ······················· Page 20

Removal And Replacement ··································· Page 21

Water Seal Installation - all models ································ Page 22

Removal And Replacement - Gearmotor Assembly ······················· Page 23

Removal and Replacement - Evaporator ····························· Page 24

Removal and Replacement: Refrigeration System ························ Page 25

Keep this manual for reference.

March 2012

Page 1

AFE424

Specifications

14.25

The nameplate is located

on the back panel.

A serial number plate is located behind the right

grill, in front of the control

box, on the base.

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

Model Number Dimensions

(w/o) legs HxWxD

AFE424A-1 33 x 24

Basic Electrical

Ice Type

Condenser Type

Typical Amps

Maximum Fuse

Refrigerant Charge, R-134a.

x 24 115/60/1 Flake Air 9 15 15 oz

AFE424W-1 same same same same same same 9 oz

AFE424A-6 33 x 24

x 24 230/50/1 Flake Air 9 15 15 oz

A scoop and legs (6") are included.

SERIAL

NUMBER

PLATE

April 2010

Page 2

AFE424

For The Installer: Environmental Limitations

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

Minimum Maximum

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.

AIR OUT

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.

Airflow on air cooled models:

Do not install where this air flow is blocked.

The AFE424 has a removable cabinet. When installed, the machine should have some extra clearance (1/8") on the left and right sides so that the cabinet may be easily removed when the machine is in place.

April 2010

Page 3

AIR IN

Intake through the right grill.

Exhaust from the left grill.

AFE424

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.

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 the water is frozen into ice, and many of the minerals stay behind in the ice machine water system. After time the minerals will have to be dissolved by ice machine cleaner, then flushed away during the cleaning process.

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. 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.

Have the water tested. Either acidic water or alkaline water will cause corrosion. Dissolved solids cannot be filtered out. Check with a water treatment specialist regarding testing, treatment and filters.

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.

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 accessible from the top?

Note: Deionized water is not recommended due to its potential corrosive nature and any damage caused by DI water will not be covered by the warranty.

April 2010

Page 4

AFE424

Installation:

For The Plumber

1. Connect cold potable water to the 3/8" male flare at the top back of the cabinet. A water filter is recommended. Flush the water line prior to connecting to the ice machine.

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 is required in the inlet potable water line because provision for that is incorporated in this N.S.F. listed product (the float seat is above the reservoir water level and cannot siphon).

2. Connect a drain tube the drain fitting. If water cooled, the drain tubes must be run separately. The bin drain fitting is 3/4" F.P.T.

AIR COOLED

PLUMBING

CONNECTIONS

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 1/4" 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.

Drain tubing should be insulated to prevent

condensation from forming on the tubing.

3.The unit is set up for drain connections on the outside of the cabinet. To connect the drains inside would require the removal of the drain fittings attached to the back panel, and field fabricated drain tubes routed inside the base of the unit.

BIN DRAIN

FLOOR

DRAIN

RESERVOIR OVERFLOW

DRAIN

CONDENSER

DRAIN

POTABLE

WATER

INLET

April 2010

Page 5

WATER COOLED

PLUMBING

POTABLE

WATER INLET

CONDENSER

INLET

AFE424

Installation

For The Electrician

This is a cord-connected unit, and must be on a separate single phase power supply. Check the nameplate for the correct voltage. The maximum fuse size for this circuit should be 15 amps, per the nameplate use fuses, or HACR circuit breakers.

Follow All Local Codes - THIS UNIT MUST BE GROUNDED. Do not use extension cords and do

not disable or by-pass ground plug 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).

2. Wash 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 correct voltage and is the ice machine the only load on that circuit?

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

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?

April 2010

Page 6

AFE424

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:

1. Switch the master switch to OFF. Be certain the ice machine has been switched off.

2. Open the bin door and turn the knobs to unscrew the mounting bolts at the left and right inside of the ice storage bin. Remove the mounting bolts.

3. Pull the hood and door assembly straight out until it can be lifted up. Caution: the door may be free to come out the back of the hood when removed from the cabinet base.

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

5. Remove 4 screws and the two grills at the front of the base.

6. In the area exposed when the grills are removed are two knobs similar to those removed in step 2. Unscrew and remove the two knobs.

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

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

The machine is now exposed for service.

STEP 2

STEP 5

STEP 3

HOOD

STEP 8

BIN

DRAIN

STEP 6

April 2010

Page 7

AFE424

Component Location

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.

In the bin area can be found

Float

Reservoir

Evaporator

Bin Thermostat sensing tube

Behind the right front grill on the front edge of the control box:

Bin thermostat

Master switch

Inside the control box are the auger delay control, low pressure cut out, and the contactor.

Auger Delay Pressure Control: This pressure switch, connected to the low side of the refrigeration system, controls the auger drive motor.

High Pressure Cut Out: The pressure switch is designed to open and shut off the machine should the high side refrigeration pressure become too high, usually as a result of not enough water through the water cooled condenser or a fan motor failure.

Air cooled is an automatic reset, water cooled is a manual reset.

On-Off switch: This toggle switch shuts off the machine. It is not a complete disconnect.

Bin Thermostat: This thermostat turns the machine on and off in response to changes in temperature of the capillary tube. At the minimum setting, it opens at 35 the maximum setting, it opens at 51

at 61

F. See “Initial Start Up” for adjustment

information.

F. and closes at 450F. At

F. and closes

CUTAWAY VIEW

Air Cooled Shown

RESERVOIR

COVER PLATE

BIN THERMOSTAT

BRACKET

CONTROL BOX

April 2010

Page 8

HI PRESSURE CUT OUT

+ 17 hidden pages