Scotsman MCM1462R Installation Manual

MCM1462R

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 service this ice system.

Table of Contents

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

For the Installer

Location & Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Freeze Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Harvest Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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

This manual was printed on recycled paper.

April, 1993

Page 1

MCM1462R

FOR THE INSTALLER

The MCM1462R will fit Scotsman ice storage bin MDB900 and is stackable with stacking kit KSMCM48. Either a Scotsman remote condenser or a Mac 6 condensing system are required to for this ice system.

Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of U.L., N.S.F., and C.S.A.

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.

Other items required:

•• Precharged tubing kit

•• Power cord and receptical

•• Condenser power cord

•• If stacking two units, a stacking kit

•• If using one unit, a caster kit for the bin.

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

Back View

Model Number Dimensions

(without bin) W" x D" x H"

MCM1462RS-3A

48 x 24

⁄8 x 271⁄2

Basic Electrical

208-230/60/3 R-22 20.5 30 256 oz. Remote Air

Refrigerant Type

Minimum Circuit Ampacity*

Maximum Fuse Size

Refrigerant Charge** R-22

Condenser Type

* Minimum Circuit Ampacity is used to determine wire size and type per the National Electric Code. ** The unit is shipped with the full charge in the receiver. For re-charging purposes, if the nameplate charge

is different than this number, go by the nameplate. Use Scotsman remote condenser RC1422, or Mac 6. Use precharged tubing kit MLS2255 (55’) or

MLS2265 (65’) or MLS2275 (75’). Power Cord is kit number: MPC Caster Kit is number: KBC9 This ice system (except remote condenser) is designed to be installed indoors, in a controlled environment.

MINIMUM MAXIMUM Air Temperature 50 Water Temperature 40 Water Pressure 20 psi 80 psi Voltage -5% +10%

F. 1000F.

April, 1993

Page 2

FOR THE INSTALLER: Location & Assembly

SHIPPING

BRACKETS

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. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the envrionmental limitations.

MCM1462R

Storage Bin:

Tip the storage bin on its back, using parts of the carton to protect the exterior finish. Install the casters, use a heavy duty leg kit if stacking two ice machines on one bin.

1. Arrange for proper electric, water and drain. See instructions for the plumber and for the

electrician.

2. After mounting the casters, position the ice storage bin in the selected location:

Note: Allow enough space to the left and back to service the machine. Do NOT push the bin into postion, instead, lift it there. Pushing a bin may damage the legs and leg mounts.

Level the bin in both the front to rear and side to side directions by adjusting the leg levelers.

3. Inspect the bin top mounting gasket which should be flat, with no wrinkles, to provide a good water seal when the cuber is installed on top of the bin.

ICE MACHINE AND BIN ASSEMBLY

4. Install the bin bumpers onto the top edge of the bin, so that they hang-over the back.

Ice Maker:

Install the modular cuber on top of the bin using care to be sure a good seal is made between the two cabinets. Use of a mechancial lift is recommended. Align the holes in the bottom rear of the cabinet to mate with the two mounting holes on the top rear of the bin.

Use bolts and straps found on the back of the ice machine to secure the ice machine to the bin. When alignment and leveling are completed, tighten the bolts to secure the mounting straps.

Remove the front panel, and remove the evaporator shipping brackets and hardware.

April, 1993

Page 3

MCM1462R

FOR THE INSTALLER: Location & Assembly

Stacking Instructions

A stacking kit, KSMCM48, is required to interconnect the ice level controls, seal the freezing compartments, support the bin with heavy duty legs, and retain the front panels.

Follow the installation instructions of the stacking kit, but in general:

The first thing to do when adding a unit is to replace the bin casters (if the unit has been installed with casters) wtih heavy duty legs.

Casters must not be used with two ice machines on one bin.

When stacking two units, remove the top panel and the evaporator cover from the lower icemaker.

STACKING

(The top removed from the lower icemaker will no longer have any function.)

Add a strip of gasket (from the stacking kit) to the top edge of the bottom ice machines evaporator compartment.

Install the panel retaining bracket onto the bottom ice machine before placing the upper unit on it.

Place additional gasket onto the top edges of the bottom ice machine.

Carefully lift the uncrated top unit onto the bottom one and align the two cabinets. Use of a mechanical lift is recommended for this step.

At the back of the two icemakers, bolt the upper icemaker cabinet to the lower icemaker cabinet using the mounting straps and bolts from the hardware package.

Add the relay kit to interconnect the two ice machine’s bin control circuits.

PANEL RETAINING

BRACKET

EVAPORATOR COVER

April, 1993

Page 4

FOR THE INSTALLER: Scotsman Remote Condenser

MCM1462R

Locate the condenser as near as possible to the interior location of the ice maker.

Location of the condenser is limited by the specific length of precharged refrigerant tubing supplied for the application. The pre-charged tubing connects the icemaker to the remote condenser. The condenser must be above the ice maker.

Select the best available location, protecting the condenser from extremes of dirt, dust, and sun.

Meet all applicable building codes. Roof Attachment:

Install and attach the remote condenser unit 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.

REFRIGERANT CONNECTIONS

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.

////////////////////////////////////////////////////////////////////////////

1. Each set of precharged refrigerant lines 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, the end without access valves goes to the icemaker.

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 1.75". 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.

TYPICAL

INSTALLATION

LOCATE CONDENSER

NO LOWER THAN ICE

MACHINE

////////////////////////////////////////////////////////////////////////////

3. Route the refrigerant lines through the roof opening.

Follow straight line routing whenever possible. Any excess tubing MUST be retained within the

building.

4. Spiral any excess length of pre charged tubing inside the building. Use a horizontal spiral to avoid any traps in the lines.

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

6. The flexible end of the tubing must be installed behind the icemaker; it is to be looped down from the ice machine connection area then back up the wall behind the ice machine. This allows un-stacked units to be pulled out for service.

April, 1993

Page 5

ELECTRICAL

CONNECTION TO

ICE MACHINE

MCM1462R

FOR THE INSTALLER: Mac 6 Remote Condenser

MAC 6 INSTALLATION

DISCHARGE LINE

FROM ICE

MACHINE

LIQUID LINE

TO ICE

MACHINE

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.

////////////////////////////////////////////////////////////////////////////

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 1.75". 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.

4. Spiral any 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.

Mac 6 Connections: The condenser circuits used for the ice machine

are located in the area shown, and are labeled. This Scotsman ice machine uses R-22, be certain

that the circuit being used also contains R-22, not dry air or R-502.

If in doubt about the type of refrigerant, do not complete the connections at the ice machine end until the tubing and condenser circuit have been connected, evacuated and a few ounces of R-22 added.

April, 1993

Page 6

FOR THE INSTALLER: Coupling Instructions

MCM1462R

////////////////////////////////CAUTION///////////////////////////////// The couplings on the sets of precharged lines are

self sealing when installed properly. 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.

••The 1/2 inch discharge line (schrader valve

end) goes to the remote condenser fitting marked “discharge line”.

••The 3/8 inch liquid line (schrader valve end)

goes to the remote condenser fitting marked “liquid line”.

Final Connections:

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.

TIGHTENING THE QUICK CONNECTS

SCHRADER

VALVES

••The 1/2 inch discharge line goes to the

icemaker fitting marked “discharge line”.

••

The 3/8 inch liquid line goes to the icemaker fitting marked “liquid line.”

LIQUID LINEDISCHARGE LINE

INSULATION

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.

April, 1993

Page 7

DETAIL OF JUNCTION BOX

MCM1462R

FOR THE ELECTRICIAN

SEE NAMEPLATE for current requirements to determine wire size to be used for electrical hookup. When the cuber and the remote condenser are connected, each must be grounded to the other using the ground screws provided in the respective junction boxes. The cuber then requires a solid chassis to chassis earth ground wire. See Wiring Diagram. Be certain the cuber is connected to its own electrical circuit and individually fused. Voltage variation should not exceed ten percent of the nameplate rating, even under starting conditions. Low voltages can cause erratic operation and may be responsible for serious damage to the icemaker.

ELECTRICAL CONNECTIONS

The Scotsman remote condenser is designed to be powered from the ice machine. There is a separate electrical junction box at the back of the ice maker for the remote condenser. Wire the remote condenser to the ice maker in accordance with local and national electric codes. All outdoor wiring must be in rainproof conduit.

The Mac 6 is connected to the ice machine’s electrical circuit, but draws no power from it.

The condenser fan motor will run whenever the compressor is running.

Electrical connections are made at the rear of the icemaker, inside the junction box.

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

GROUND

SCREW

HAND

DISCONNECT

SWITCH

POWER

SUPPLY

INTERCONNECTING

WIRES

REMOTE CONNECTION

April, 1993

Page 8

FOR THE PLUMBER

MCM1462R

The recommended water supply line is a 3/8-inch O.D. copper tubing with a minimum operating pressure of 20 PSIG and a maximum of 80 PSIG.

Connect to cold water supply line with standard plumbing fittings, with shut off valve installed in an accessible place between the water supply and the cuber. ln some cases a plumber will be required.

Water Limitations:

An ice machine is a food manufacturing plant, it takes in 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. It is generally better to filter the water, although there is no one filter that will cure all water problems. A good filter combined with a polyphosphate feeder gives about the best overall performance.

DRAIN

Connections: All drains are gravity type and must have a minimum of 1/4-inch fall per foot on horizontal runs. The drains to be installed to conform with the local plumbing code. Install a vertical open vent on drain line high point to insure good draining. The ideal drain receptacle is a trapped and vented floor drain. Recommended bin drain is 5/8 inch O.D. copper tubing and should be vented and run separately. Insulation for high humidity areas is recommended.

The ice machine sump drain is 3/4" FPT. There must be a vent at this connection for proper sump draining.

POTABLE

WATER

SUPPLY

HAND

SHUT OFF

VALVE

AIR GAP BETWEEN

DRAIN LINES AND

BUILDING DRAIN

SUMP DRAIN MUST

BE VENTED

3/4" FPT

OPTIONAL

FILTER

3/8" MALE FLARE

BIN

DRAIN

WATER SUPPLY AND DRAIN CONNECTION

April, 1993

Page 9

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