Scotsman NME1850R Owner’s Manual

INTRODUCTION

NME1850R & FME2400R

To the owner or user: The service manual you are reading is intended to provid e y ou, and the maintenance or service technician, with the information needed to install, start up, clean, maintain, and service this ice system.

The product is a remote condenser modular ice system. It features: front service for the freezer, gear motor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; and R-404A as the refrigerant.

TABLE OF CONTENTS

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

REMOTE CONDENSER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

FOR THE INSTALLER: Precharged Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

FOR THE INSTALLER: Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

FOR THE INSTALLER: Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . . . . Page 23

SERVICE DIAGNOSIS: Condition - Low Ice Production . . . . . . . . . . . . . . . . . . . . . Page 26

REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . . . . . Page 27

REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . . . . Page 28

REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30

REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

REMOVAL AND REPLACEMENT: Gear motor Assembly . . . . . . . . . . . . . . . . . . . . Page 32

REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 33

CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34

Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper.

The manual was printed on recycled paper. Keep it for future reference.

Note the Warning symbol where it appears. It marks a possible hazard.

January 1995

Page 1

Drain 3/4" FPT

18.28"

NME1850R & FME2400R

FOR THE INSTALLER

These machines are designed to fit the following Scotsman storage bins:

••B90 and extensions, with bin

top KBT18.

••BH800 no bin top needed.

••BH900 using bin top KBT14.

When installing a new system, check to be sure that you have everything you need befor e beginning:

••Correct Bin

••Correct Ice Machine

••Correct Bin Top

••All kits, legs, and information

required for the specific job.

There are two separate ice making

and refrigeration systems in thi s

model. The liquid and discharge lines from each system must go

to separate circuits in one remote

condenser (RCE502).

TOP VIEW

Ice Chute

6.7" x 6.2"

BACK VIEW

Allow 6" of space behind the machine

for utility connectio ns .

34.84"

Liquid Line Connection

(right system)

15.53"

3.1"

21"

3.1"

13.84"

Discharge Line

Connection

(left system)

Allow 6"

above

machine for

service.

SPECIFICATIONS: ICE MAKER

Model

Number

FME2400RE-32A

FME2400RE-3A

NME1850RE-32A

NME1850RE-3A

Dimensions

(w/o bin)

H X W X D

27" x 42" x 24"

20.84"

same same same

5.25"

Basic

Electrical

208-230/60/1 208-230/60/3 208-230/60/1 208-230/60/3

February 19 95

17.8"

18.8"

21.66"

Type

FLAKE

same

Nugget

same

Page 2

Ice

Cond.

Type

R/Air R/Air R/Air R/Air

4.5"

9.43"

Remote Condenser

Junction Box

Electrical Inlet

Water Inlet 3/8" Flare

The Standard Finish is Enamel Sandalwood. There is an optional stainless steel panel kit, SPKFM42 available to convert the unit to Stainless Steel. It is field installed.

FOR THE INSTALLER

Installation Limitations:

This ice system is designed to be installed indoors, in a controlled environment:

Min Max

Air Temperature 50 (Not including the remote condenser) Water Temperature 40 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.

F100

Water Limitations:

An ice machine is a food manufacturing plant; it takes 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. This is not intended as a complete resource for water related questions, but it does offer these general recommendations:

1. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment.

2. In most cases, the water used to make ice should be filtered or treated, depending upon the water.

will be effective in all situations.

water test is important.

There is no one type of water filter that

That is why a

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.

NME1850R & FME2400R

1.25"

January 1995

Page 3

Typical Storage Bin - B90

21.12"

Drain

3/4" FPT

19.86"

NME1850R & FME2400R

REMOTE CONDENSER SPECIFICATIONS

1/2" MALE QUICK CONNECT

COUPLING FOR USE WITH

RTE25 OR RTE40

PRECHARGED LINE SET

22"

5.75"

5.38"

32.56"

27.81"

5.0"

MODEL USE WITH MINIMUM CIRC.

RCE502 27.8" X 22 X 37.94" 1 FME2400R or 1

+Included with the ice makers minimum circuit ampacity. Use this

value to determine wire si ze between ice maker and fan motor.

DIMENSIONS H" X W" X D"

6.5"

3.5"

1.9" LIQUID LINE 3/8" MALE

QUICK CONNECT

COUPLING FOR USE

WITH RTE25 OR RTE40

PRECHARGED LINE SET

NME1850R

RTE25 Precharged line set, 25’, R-404A - 2 required. Or: RTE40. Precharged line set, 40’, R-404A - 2 required.

7.5"

AMPACITY+

2 208-230/60/1

BASIC

ELECTRICAL

ICE MAKER NAMEPLATE

LOCATED ON BACK PANEL

SERIAL PLATE LOCATED

BEHIND FRONT PANEL

REMOTE CONDENSERS AND BINS ALSO

HAVE MODEL AND SERIAL NUMBERS

February 19 95

Page 4

FOR THE INSTALLER

Typical Storage Bin with Extension and Bin Top

NME1850R & FME2400R

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

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.

January 1995

Page 5

REMOTE CONDENSER

SPIRAL EXCESS TUBING

INSIDE

BUILDING

NME1850R & FME2400R

FOR THE INSTALLER: Remote Condenser

Location

Limited to a 40 foot or a 25 foot length of precharged refrigerant tubing connecting the ice maker to the remote condenser. The condenser must be above or level with the ice maker.

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 ice maker, using the junction box at the back of the ice maker.

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.

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.

Note: Tight spiral shown is not required, bend

tubing to a practical radius.

Refrigerant charge is in the ice maker. Only a

holding charge is in the "pre-charged" lines.

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.

LOCATE REMOTE

CONDENSER

ABOVE ICE MAKER

January 1995

Page 6

NME1850R & FME2400R

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.

••Connect the 3/8 inch liquid line (schrader valve

end) to the remote condenser fitting marked "liquid line".

••Connect the other end of the liquid line to the

ice maker fitting marked "liquid line."

••Connect the 1/2 inch discharge line (schrader

valve end) to the remote condenser fitting marked "discharge line".

••Connect the other end of the liquid line to the

ice maker fitting marked "discharge line".

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. After all connections are made, and after the king valve has been opened, check the couplings for leaks.

SERVICE PORTS

REMOTE CONDENSER

3/8" LIQUID LINE

1/2" DISCHARGE

LINE

3/8" LIQUID LINE

SCHRADER

VALVE

CONDENSER

TO REMOTE

1/2" DISCHARGE

LINE

NO SCHRADER

VALVE

TO ICE MAKER

January 1995

Page 7

ICE MAKER

NME1850R & FME2400R

FOR THE INSTALLER: Location

CONTACT ROOFING

CONTRACTOR

EXCESS

PRECHARGED

TUBING INSIDE

BUILDING

REMOTE

CONDENSER

ROOF

CUTAWAY

SERVICE

ACCESS

SERVICE ACCESS

SIDE AND BACK

WALL

CUTAWAY

January 1995

Page 8

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

NME1850R & FME2400R

Water Inlet

CONNECT TO

COLD WATER

FIELD

SUPPLIED

WATER FILTER

HAND SHUT

OFF VALVE

WATER INLET

3/8" MALE

FLARE

VENT ICE

MAKER

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

January 1995

Page 9

NME1850R & FME2400R

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.

Electrically the remote condenser fan motor is connected to the ice maker at the contactor

TERMINAL STRIP

FOR REMOTE

CONDENSER

ICE MAKER

JUNCTION BOX

POWER

SUPPLY

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 ice maker and at the junction box on the remote condenser.

The remote condenser must be wired to the ice maker 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 rain proof 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

RAIN PROOF

CONDUIT

January 1995

Page 10

INSULATED

PRECHARGED

REFRIGERANT

TUBING

NME1850R & FME2400R

FOR THE INSTALLER: Completed Installation

A typical installation should generally appear as illustrated below. The remote condenser must be located above the ice maker and the precharged lines installed per the instructions on page 6.

January 1995

Page 11

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