Scotsman FME1204R, NME954R Service Manual

INTRODUCTION

NME954R & FME1204R

To the owner or user: The service manual you are reading 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 ice machines covered in this manual are a remote condenser type modular ice system that fits a variety of Scotsman storage bins. They feature: front service for the freezer, gear motor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; a thermostatic expansion valve; and R-404A as the refrigerant.

Table of Contents

FOR THE INSTALLER ······································ Page 2 REMOTE CONDENSER SPECIFICATIONS ··························· Page 3 FOR THE INSTALLER ······································ Page 4 Remote Condenser Location ··································· Page 5 FOR THE INSTALLER: Remote Condenser ··························· Page 6 FOR THE INSTALLER: Coupling Instructions ·························· Page 7 FOR THE INSTALLER: Location ································· Page 8 FOR THE PLUMBER ······································· Page 9 FOR THE ELECTRICIAN ····································· Page 10 FOR THE ELECTRICIAN: Fan Relay Kit ···························· Page 11 FOR THE INSTALLER: Completed Installation ·························· Page 12 FOR THE INSTALLER: Final Check List ····························· Page 13 START UP ············································ Page 14 COMPONENT DESCRIPTION ·································· Page 15 COMPONENT DESCRIPTION: Control Box ··························· Page 16 ELECTRICAL SEQUENCE: ··································· Page 17 OPERATION: Water ······································· Page 18 OPERATION: Refrigeration ···································· Page 19 OPERATION: Refrigeration ···································· Page 20 MAINTENANCE AND CLEANING ································ Page 21 Sensor Maintenance ······································· Page 22 Bearing Maintenance ······································· Page 23 Auger Maintenance ········································ Page 24 SERVICE DIAGNOSIS: No Ice ·································· Page 25 SERVICE DIAGNOSIS: Low Capacity ······························ Page 26 CONTROL SYSTEM DIAGNOSTICS ······························ Page 27 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls ··············· Page 28 REMOVAL AND REPLACEMENT: Bearing and Breaker ···················· Page 29 REMOVAL AND REPLACEMENT: Auger ···························· Page 30 REMOVAL AND REPLACEMENT: Water Seal ·························· Page 31 REMOVAL AND REPLACEMENT: Evaporator ·························· Page 32 REMOVAL AND REPLACEMENT: Gear Motor Assembly ···················· Page 33 Refrigeration Service ······································· Page 34

Parts Lists and Wiring Diagrams are located in the center of this manual.

January 2000

Page 1

This Manual Was Printed

On Recycled Paper

NME954R & FME1204R

FOR THE INSTALLER

Either the FME1204R or the NME954R is designed to fit the following Scotsman storage bins:

SB480 and extensions (with bin top KBT18)

BH800 using bin top KBT15 (one unit) or KBT25

(two units).

BH801 using bin top KBT28

BH900 with KBT24 (one unit)

BH900 with KBT25 (two units side by side)

Allow 6" above machine

for service.

NME954 Dispenser Applications

The NME954 can be placed on and used with certain ice and ice-beverage dispensers. Kits are required for proper operation:

Back View

ID150 use adapter KBT42 and KNUGDIV

ID200 or ID250, use adapter KBT46 and

KDIL-N-ID2

Cornelius ED/DF200 beverage dispensers, use

KBT46 and KDIL-N-200

Cornelius ED/DF250 beverage dispensers, use

KBT46 and KDIL-N-250

Lancer nugget IBD, use KDIL-N-L & Lancer kit.

Liquid Line Connection

Discharge Line Connection

Remote Condenser

Junction Box

Electrical Inlet

20.84"

2.96"

Drain

3/4" FPT

SPECIFICATIONS: ICE MAKER

Model Number Dimensions

(w/o bin)

H”xW”xD” FME1204RS-32A 27 x 21 x 24 208-230/60/1 FLAKE Remote Air 14.1 20 208 ounces FME1204RS-3A same 203-230/60/1 FLAKE Remote Air 11.2 15 208 ounces NME954RS-32A same 208-230/60/1 NUGGET Remote Air 14.1 20 208 ounces NME954RS-3A same 208-230/60/3 NUGGET Remote Air 11.2 15 208 ounces

Minimum Circuit Ampacity is used to determine wire size and type per National Electric Code.

Basic Electrical Ice Type Cond. Type Minimum

Water Inlet

3/8" Flare

5.25"

Circuit Ampacity

Maximum Fuse Size

Refrigerant Charge (R-404A)

January 2005

Page 2

NME954R & FME1204R

REMOTE CONDENSER SPECIFICATIONS

Model Use with Basic Electrical ERC151-32 1 FME1204R or 1 NME954R 208-230/60/1 ERC302-32 1 or 2 FME1204Rs or NME954Rs SAME

2.00

5.08

ERC DIMENSIONS

19.75

50.17

ABFG

"10

"16

"11

Liquid Line .38 Quick Connect Fitting .95

2.75

14.53

Air Discharge

Air Intake

Other Required Items:

RTE25 Precharged line set, 25’, R-404A or

Discharge Line .50 Quick Connect Fitting

1.27

Adjustable Roof Clearance

12.00 18.00 24.00

30.48 45.72 60.95

2.07

.53

1.35

(6)

RTE40. Precharged line set, 40’, R-404A.

ICE MAKER NAMEPLATE

LOCATED ON BACK PANEL

SERIAL PLATE LOCATED

BEHIND FRONT PANEL

January 2000

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NME954R & FME1204R

FOR THE INSTALLER

Installation Limitations:

The machine and bin are designed to be installed indoors, in a controlled environment:

Min Max

Air Temperature 50

(Not including the remote condenser)

Water Temperature 40

Water Pressure (PSI) 20 80

Voltage 198 253

(Compared to the nameplate)

Operating the machine outside of the limitations is misuse and can 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.

F 1000F

1000F

Location

Install the machine 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.

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, instead 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 2000

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Remote Condenser Location

NME954R & FME1204R

Use the following for planning the placement of the condenser relative to the ice machine

Location Limits - condenser location must not exceed ANY of the following limits:

Maximum rise from the ice machine to the

condenser is 35 physical feet

Maximum drop from the ice machine to the

condenser is 15 physical feet

Physical line set maximum length is 100 feet.

Calculated line set length maximum is 150.

Calculation Formula:

Drop = dd x 6.6 (dd = distance in feet)

Rise = rd x 1.7 (rd = distance in feet)

Horizontal Run = hd x 1 (hd = distance in feet)

Calculation: Drop(s) + Rise(s) + Horizontal Run

= dd+rd+hd = Calculated Line Length

Configurations that do NOT meet these requirements must receive prior written authorization from Scotsman.

Do NOT:

Route a line set that rises, then falls, then rises.

Route a line set that falls, then rises, then falls.

Calculation Example 1:

The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally.

5 feet x 6.6 = 33. 33 + 20 = 53. This location would

be acceptable

Calculation Example 2:

The condenser is to be located 35 feet above and then 100 feet away horizontally.

35 x 1.7 = 59.5. 59.5 +100 = 159.5. 159.5 is

greater than the 150 maximum and is NOT acceptable.

22.87"

17.15"

Remote

Condenser

Located ABOVE

Ice Machine

Remote

Condenser

Located BELOW

Ice Machine

40.35"

Condenser Distance and Location Schematic

January 2000

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NME954R & FME1204R

FOR THE INSTALLER: Remote Condenser

Location

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 information.

5. Have the roofing contractor seal the holes in the roof per local codes.

Note: Precharged tubing contains a R-404A holding charge. The entire refrigerant charge required for the system is contained in the ice machine.

Tubing illustration shows tight spiral; a spiral in the field depends on tubing limitations. Tight spiral not required.

REMOTE CONDENSER

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.

Spiral Excess Tubing

Inside

Building

Remote Condenser

Above Ice Maker

Any excess tubing MUST be retained within the building.

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.

January 2000

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NME954R & FME1204R

FOR THE INSTALLER: Coupling Instructions

4b. Using two wrenches, one to rotate the swivel

Note: The couplings on the sets of precharged lines must be installed properly to prevent leaking. 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.

3. Position the fittings on the correct connections on the condenser and ice machine.

nut and one to hold the tubing, tighten each coupling.

It is CRITICAL that ONLY the NUT on the pre-charged tube be turned or the diaphragms will be torn loose by the piercing knives and be loose in the refrigeration system causing severe operational problems.

Tighten Swivel Nut

Clean and Lubricate Couplings

The ½ inch discharge line (schrader valve end) goes to the remote condenser fitting marked “discharge line.”

The

inch liquid line (schrader valve end) goes

to the remote condenser fitting marked “liquid line.”

The ½ inch discharge line goes to the ice maker fitting marked “discharge line.”

The

inch liquid line goes to the ice maker

fitting marked “liquid line.”

Final Connections:

4a. Begin by tightening the couplings together by hand. Continue to turn the swivel nuts by hand until is is certain that the threads are properly engaged.

Note: As the coupling is tightened, the diaphragms in the quick connect couplings will begin to be pierced. As that happens, there will be increased resistance to tightening the swivel nut.

4c. Continue tightening the swivel nut until it bottoms out or a very definate increase in resistance is felt (no threads should be showing). Do NOT overtighten.

5. 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.

6. After all connections are made, and after the king valve has been opened (do not open at this time), check the couplings for leaks.

Schrader

Valve

TO REMOTE

CONDENSER

No Schrader

Valve

Rotate Swivel Nut ¼ Turn More

TO ICE MAKER

January 2000

Page 7

NME954R & FME1204R

FOR THE INSTALLER: Location

EXCESS

PRECHARGED

TUBING INSIDE

BUILDING

TWO UNITS ON ONE CONDENSER

REMOTE

CONDENSER

ROOF

CUTAWAY

ICE MAKERS

SERVICE

ACCESS

SERVICE ACCESS

SIDE AND BACK

WALL

CUTAWAY

January 2000

Page 8

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

NME954R & FME1204R

Water Inlet

Field Supplied

Hand Shut

Off Valve

Water Filter

Connect To Cold Water

Water Inlet

3/8" Male Flare

Vent Ice

Maker

Drain, 3/4"

FPT

Connect a cold potable water supply to the ice machine. Use 3/8" O.D. copper tubing and connect it 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

The cabinet has a ¾" FPT drain. connection. The drain is 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 ¾" rigid tubing.

Storage Bin: Install a separate gravity drain to the ice storage bin. Insulation of this drain line is recommended.

Vent Bin Drain

3/4" FPT

Floor Drain

January 2000

Page 9

NME954R & FME1204R

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

Connect the electrical power to the ice machine through the junction box at the back.

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.

Terminal Strip For

Remote

Condenser

Ice Maker

Junction Box

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

Power

Supply

Rain Proof Conduit

January 2000

Page 10

FOR THE ELECTRICIAN: Fan Relay Kit

NME954R & FME1204R

WARNING

Do all wiring with the electrical power disconnected.

To install the KCMR230 fan relay kit when using (2) 230 VOLT ice makers and one 230 volt, two circuit remote condenser (ERC302).

See the remote condenser nameplate for current requirements to determine wire size to be used for electrical hookup. Refer to wiring diagram.

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

1. Mount the control box in a convenient location.

2. Attach a solid earth ground wire to the ground screw.

3. Route connecting wires from the first ice maker junction box

(marked condenser fan) and connect it to the KCMR230 terminal strip marked: NO. 1 ICE MACHINE.

4. Route connecting wires from the second machine junction box

(marked condenser fan) and connect it to the KCMR230 terminal strip marked: NO. 2 ICE MACHINE.

5. Route connecting wires from KCMR230 terminal strip marked: TO REMOTE FAN and connect at the remote condenser junction box.

6. Check phasing of the electrical circuit as follows:

A. The phasing of the wiring MUST now be checked, as incorrect phasing will result in a failure of the kit relay.

Below is an illustration of the KCMR230 terminal strip. Note that each terminal is marked: 1-2-3-4-5-6. For proper phasing:

Terminals #1 and #3 must be connected to the same side of the line (such as L1)

Terminals #2 and #4 must be connected to the same side of the line (such as L2).

B. Make a test with a volt meter as follows:

1. Switch on ice maker #1 first, then switch on ice maker #2.

(The compressors must be operating for this test. Do this after start up.)

2. Test with a volt meter between terminals #2 and #4, then between terminals #1 and #3. Compare the readings obtained to the ones in the following list:

C. Test terminals 1-2 = Full Voltage (208-230)

Possible Location

For KCMR230

Control Box

Test terminals 1-3 = No voltage

Test terminals 2-3 = Full Voltage

Test terminals 2-4 = No voltage

Test terminals 3-4 = Full voltage

Test terminals 1-4 = Full voltage

D. If there is full voltage where there should be no voltage, turn off ice maker #2, (both switches) Then turn off ice maker #1 (both switches). The connections at the KCMR230 terminal strip marked ice maker #1 must be reversed (put the wire that was on 1 on 2 and the wire that was on 2 on 1).

WARNING

Do all wiring with the electrical power disconnected.

January 2000

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