Scotsman CMS1202R User manual

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.

CMS1202R

September 1993

Page 1

Model Number Dimensions

(without bin)

W" x D" x H"

Basic

Electrical Refrigerant

Type Minimum

Circuit

Ampacity*

Maximum

Fuse

Size

Refrigerant

Charge**

R-22

Condenser

Type

CMS1202RE-3B 48 x 243⁄8x 271⁄2208-230/60/3 R-22 15.2 20 256 oz. Remote Air

CMS1202RE-32B 48 x 243⁄8x 271⁄2208-230/60/1 R-22 21.2 30 256 oz. Remote Air

* 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. Use precharged tubing kit RT2225 (25’) or RT2240 (40").

This ice system (except remote condenser) is designed to be installed indoors, in a controlled environment.

MINIMUM MAXIMUM

Air Temperature 500F. 1000F.

Water Temperature 400F. 1000F.

Water Pressure 20 psi 80 psi

Voltage -5% +10%

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.

Scotsman reserves the right to make

design changes and/or improvements

at any time. Specifications and

designs are subject to change without

notice.

FOR THE INSTALLER

The CMS1202R will fit the following Scotsman ice

storage bins:

••BH900

••BH1000 (with bin top KBT21)

••BH1360

and it will stack (with kits) onto the following ice

machines:

••CMS1402 (with stacking kit KSCMS48)

••CMS1202 (with stacking kit KSCMS48)

Aremote condenser and precharged tubing kit are

required to assemble this ice system.

The normal finish for the machine is enamel

sandalwood. An optional stainless steel panel kit

(SPKCM1402) can be field installed. It contains a

stainless steel top, left side panel, an overlay right

side panel, and front panel.

This manual covers both Aand B models (B

models have 2 front panels).

CMS1202R

September 1993

Page 2

FOR THE INSTALLER: Location & Assembly

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.

Storage Bin:

Tip the storage bin on its back, using parts of the

carton to protect the exterior finish. Install the legs,

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 legs, 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 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.

SHIPPING

BRACKETS

ICE MACHINE AND BIN ASSEMBLY

CMS1202R

September 1993

Page 3

FOR THE INSTALLER: Location & Assembly

Stacking Instructions

When stacking two units, remove the top panel

and the evaporator cover from the lower icemaker.

(The top removed from the lower icemaker will no

longer have any function.)

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.

Astacking kit is required to interconnect the CMS

ice level controls.

EVAPORATOR COVER

STACKING

TRIM STRIP - PART OF

KSCMS48 STACKING KIT

CMS1202R

September 1993

Page 4

FOR THE INSTALLER: Remote Condenser

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.

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.

REFRIGERANT

CONNECTIONS

TYPICAL

INSTALLATION

LOCATE CONDENSER

NO LOWER THAN ICE

MACHINE

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.

CMS1202R

September 1993

Page 5

FOR THE INSTALLER: Coupling Instructions

////////////////////////////////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”.

••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.”

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.

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.

SCHRADER

VALVES

LIQUID LINE

DISCHARGE LINE

INSULATION

TIGHTENING THE QUICK CONNECTS

CMS1202R

September 1993

Page 6

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.

The 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 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.

INTERCONNECTING

WIRES

GROUND

SCREW

DETAIL OF JUNCTION BOX, 3 PHASE SHOWN

ELECTRICAL CONNECTIONS

HAND

DISCONNECT

SWITCH

REMOTE CONNECTION

POWER

SUPPLY

CMS1202R

September 1993

Page 7

FOR THE PLUMBER

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. Even though there isn’t 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.

WATER SUPPLY AND DRAIN CONNECTION

AIR GAP BETWEEN

DRAIN LINES AND

BUILDING DRAIN

BIN

DRAIN

VENT

3/8" MALE FLARE

SUMP DRAIN MUST

BE VENTED

OPTIONAL

FILTER

POTABLE

WATER

SUPPLY

HAND

SHUT OFF

VALVE

3/4" FPT

CMS1202R

September 1993

Page 8

FINAL CHECK LIST

1. Is the cabinet in a room where ambient

temperatures are within the minimum and

maximum temperatures specified?

2. Is there clearance at the left and back sides of

the cabinet for service access?

3. Has water supply pressure been checked to

insure a minimum of 20 PSIG and a maximum of

80 PSIG operating pressure?

4. Is the cabinet level?

5. Check that any shipping material has been

removed from inside the

cabinet.

6. Check that the reservoir is

properly secured to the bottom

of the evaporator plates.

7. Have all electrical, water and

drain connections been made?

8. Is the water supply line shut

off valve installed and electrical

wiring properly connected?

9. Check all refrigerant lines

and conduit lines, to guard

against vibration or rubbing and

possible failure.

10. Have the bin and cabinet

been wiped clean?

11. Has the Manufacturers

Registration form been properly

filled out? Check for correct

model and serial numbers from

Serial nameplate, then mail to

the SCOTSMAN factory.

12. Has the owner/user been

given the Service Manual and

instructed how to operate and

maintain the icemaker?

13. Has the owner been given

the name and telephone

number of the authorized

SCOTSMAN Service Agency

serving him?

LEVEL

ASSEMBLY

SUMP DRAIN

OPTIONAL

FILTER

HAND SHUT

OFF VALVE

FINAL INSTALLATION

BIN DRAIN

PRECHARGED

LINES

CONNECTED

CMS1202R

September 1993

Page 9

INITIAL START UP

Before Start Up:

1. Check that the ICE-OFF-WASH rocker switch

and the Compressor ON-OFF switch are in the

OFF position.

2. Switch on the electrical power. Electrical power

must be supplied to the ice machine for 12 hours

before starting the compressor for the first time.

The crankcase heater will now warm up the

compressor’s oil. The oil is warmed to evaporate

any refrigerant that may have collected in it. If

there is refrigerant in the oil when the compressor

starts, the oil will foam and will not lubricate the

compressor properly, shortening its life.

Do not start the compressor for the first time

unless the dome of the compressor is warm.

Start Up:

1. Remove front panel(s) by removing screws at

the base and pulling out.

2. Remove two screws and the control box cover.

3. OPEN the water supply line shut off valve..

4. Open the “king” valve on the receiver.

5. Inside the control box is the shaft of the timer

and the switch assembly. Rotate the shaft of the

timer and switch assembly clockwise until the

actuator arm on the microswitch drops off outer

cam into cam slot. See “Front View of Timer”.

6. Move the ICE-OFF-WASH to the ICE position.

7. Check the water fill cycle: For several minutes

the inlet water valve will be open and water will

flow into the reservoir. Near the end of the fill

cycle, water should be overflowing the reservoir

and draining thru the reservoir drain. If at the end

of the fill cycle the reservoir is not full, repeat step

Check that the sump covers are snapped in place.

Check that the water distributors are properly

seated at the top of the evaporators, and that

water is flowing over all cube cells.

Note: Some water spray from the evaporators is

normal when the machine is new. The spray will

quit after a few cycles.

8. When the sump has filled, move the compressor

ON-OFF toggle switch, to the ON position.

CUBE SIZE

CONTROL

TIMER

CONTROL BOX

ICE/OFF/WASH

BIN ICE LEVEL SWITCH

FRONT VIEW OF TIMER

MICROSWITCH

ACTUATOR

BUTTON

CAM

HARVEST

PORTION

FREEZE

PORTION

CMS1202R

September 1993

Page 10

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