CMA Dishmachines CWS Service Manual

MODEL CWS

SERVICE & PARTS MANUAL

Rev 1.00

CMA DISHMACHINES
12700 KNOTT AVENUE

GARDEN GROVE, CALIFORNIA 92841

800-854-6417

FAX [phone]

www.cmadishmachines.com

TABLE OF CONTENTS

Model CWS

1. SPECIFICATIONS.........................................................................................2

1.1 CWS ............................................................................................................................................... 2

2. GETTING STARTED .....................................................................................3

2.1. INTRODUCTION TO THE CWS .......................................................................................................... 3

2.2. RECEIVING AND INSTALLATION ...................................................................................................... 4

2.2.1. Electrical ................................................................................................................................4

2.2.2. Plumbing................................................................................................................................. 4

2.2.3. Connecting the Scrap Accumulator and Drain....................................................................... 5

3. OPERATION..................................................................................................6

3.1. INITIAL SETUP................................................................................................................................. 6

3.2. STARTUP PROCEDURES ................................................................................................................... 7

4. PARTS MANUAL ..........................................................................................8

4.1. INITIAL PARTS KIT (P/N)................................................................................................................. 8

4.2. OPTIONAL SANI ALARM .................................................................................................................. 9

4.3. EXPLODED VIEW DRAWINGS......................................................................................................... 10

4.3.1. Cabinet Assembly ................................................................................................................. 10

4.3.2. Three Compartment Sink...................................................................................................... 11

4.3.3. Control Box Assembly .......................................................................................................... 12

4.3.4. Door Actuator Assembly....................................................................................................... 13

4.3.5. Pump Assembly..................................................................................................................... 14

4.3.6. Plumbing System Assembly................................................................................................... 15

4.3.7. Spray System Assembly......................................................................................................... 16

4.3.8. Power Drain Assembly......................................................................................................... 17

4.3.9. Power Drain Retrofit Kit ...................................................................................................... 18

4.3.10. Peristaltic Pump Assembly................................................................................................... 19

4.3.11. Booster Heater Assembly...................................................................................................... 20

5. ELECTRICAL DIAGRAM ............................................................................21

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1. Specifications

Electrical and plumbing connections must be made by a qualified service person who will
compl

with all available Federal, State, and Local Health, Electrical, Plumbing and Safety

1.1 CWS

METRIC USA

WATER CONSUMPTION

PER RACK 1.7 GAL. (6.4 L)
PER HOUR 51 GPH. (193 LPH)

OPERATING CYCLE

WASH TIME-SEC. 57 57
RINSE TIME-SEC. 48 48
DWELL TIME-SEC. 15 15
TOTAL CYCLE 120 SEC. 120 SEC.

OPERATING CAPACITY

RACKS PER HOUR 30 30
WASH TANK CAPACITY 1.7 GAL. (6.4 L)
PUMP CAPACITY 68 GPM (257 LPM)

WATER REQUIREMENTS

REQUIRED MINIMUM TEMP. 120°F (49°C)
RECOMMENDED TEMP. 140°F (60°C)
WATER INLET 3/4” —
DRAIN -MACHINE 2” —
DRAIN-SINKS 1-1/2” —
DIMENSIONS
DEPTH 31” (78.7 cm)
WIDTH CWS 102” (259 cm)
WIDTH CWS W/DRAIN BOARD 120-1/4” (305 cm)
HEIGHT 68” (172 cm)
MAX CLEARANCE FOR DISHES 27” (68 cm)
STRANDARD RACKS 19 ¾” x 19 ¾” (50 x 50 cm)

ELECTRICAL RATING
SINGLE PHASE

SINGLE PHASE
THREE PHASE
THREE PHASE
WASH PUMP MOTOR 2 HP

VOLTS

(60-Hz)

208
240
208
240

AMPS

57
62
38
40

SHIPPING WEIGHT
APPROXIMATE 708# (321 kg)

MODEL CWS SERVICE & PARTS MANUAL Rev. 1.00 Page

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Getting Started

2. Getting Started

2.1. Introduction to the CWS

The CWS Dishmachine is safe and easy to operate with its “Auto Start/Stop” and it’s economical
to operate—using only 1.7gallons of water per cycle. The CWS Dishmachine’s top mounted
controls include built-in chemical pumps and a de-liming system that assures prop er chemical
usage. Its integrated scrap tray prevents food soil from entering the drain system. The CWS can
be run at a rate of 30 racks / 120 covers per hour and its heavy duty stainless steel construction
assures long life and years of trouble free operation.

The supply water to the dishmachine should be 140°F. The pipe supplying the water must be ¾”
minimum. The supply water connects to the gate valve located at the back of the machine (¾”
female pipe thread connection). Temp Sure Hot Water Assurance System guarantees hot water
every cycle. The drain is 2" and comes off of the scrap accumulator for easy attachment of your
drain line. See section

The CWS conceals a three-compartment sink within the soiled dishtable that complies with local
health code requirements.

This manual is structured to provide a complete reference guide to the CWS Dishmachine. It is
presented in a manner that all users will be able to comprehend and use as an effective tool in
supporting the operation and maintenance of the dishmachine. The first section explains how the
machine is packaged and what to look for when receiving the machine.

After unpacking the machine, this manual explains how to install and set up the machine for use.
Requirements are given for plumbing, wiring, and space considerations. These attributes of the

machine are always taken into consideration by our well-trained sales representatives prior to the
order being placed. In the manual, guidance is also given for installation to ensure that the

machine will be able to run at optimum conditions.
The Operation section of the manual may be used for instruction and procedures when required.

We make this portion of the manual easy to understand so that all levels of operators may be
able to read and comprehend the operation of the machine. The function of the machine itself is
mostly automatic and takes little training to put into full operation.

A wiring diagram for the machine is located at the end of the manual.
CMA warranties the workmanship of the machine.
We are committed to providing the best machines and customer service in the food industry and

your feedback is welcome.

2.2.3 Connecting the Scrap Accumulator and Drain

MODEL CWS SERVICE & PARTS MANUAL Rev. 1.00 Page

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Getting Started

2.2. Receiving and Installation

The dishwasher is shipped from the factory in a corrugated box on a wooden pallet. The
installation guidelines give a systematic procedure for setting up the machine.

Start by removing the dishmachine from the box. Remove the packaging, unwrap the machine
and check for the following components:

 Scrap Accumulator complete with lid and scrap tray.
 Inside the wash tank is a box with one control box key, 4 legs, thermometer, spray

arms, machine manual and a cam timer wrench.

 Tube Stiffeners: The tube stiffeners must be used to prevent the feed tubes from

curling up inside the chemical pail allowing the tip to rise out of the chemical.
Remove the tie-wraps securing the tube stiffeners to the dishmachine to free them up
for use. Be careful not to remove any of the tie-wraps securing the tube bundle. Red
is for detergent, white for sanitizer, and blue for rinse aid.

2.2.1. Electrical1

The CWS Dishmachine must be hard wired directly to a dedicated 240 VAC, 60Hz, 3 Phase.
circuit equipped with proper circuit protection.

2.2.2. Plumbing2

The water supply connection is made with a ¾” hot water line to the water supply inlet on the top
of the machine. The water supplied to the machine is recommended to be 140° F (120° F
minimum).

Caution: Do not connect galvanized pipe water supply to dishmachine. This will create
electrolysis, causing corrosion.

The CWS Dishmachine has a 2” drain. The following section explains how to connect the drain.

1

All electrical connections must be made by a qualified electrician

2

All plumbing connections must comply with all plumbing and safety codes

MODEL CWS SERVICE & PARTS MANUAL Rev. 1.00 Page

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Getting Started

2.2.3. Connecting the Scrap Accumulator and Drain

The scrap accumulator is designed to perform two basic functions:

1. It allows a method to discharge all the heavy solids out of the machine with each
wash cycle.

2. It provides accumulation capacity to allow draining the contents of one cycle
regardless of the discharge rate of the existing drain.

The drainpipe is connected to the scrap accumulator drain using a 2” no-hu b connector as shown

Figure 2.2.3 below.

in

SCRAP ACCUMULATOR

2" DRAIN

SLEEVE

Figure

2.2.3

2"

NO-HUB

HOSE

CLAMPS

2" DRAINPIPE

MODEL CWS SERVICE & PARTS MANUAL Rev. 1.00 Page

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Operation

3. Operation

3.1. Initial Setup

All machines are equipped with switches to prime the peristaltic pumps at anytime the master
switch is "ON".

Following completion of the installation, always fill the machine with water before starting the
machine.

1. With the power “ON” hold the fill button until the water level overflows into the scrap
accumulator.

2. Check the chemical lines to the chemical containers.

a. Red: detergent line.
b. Blue: rinse agent line.
c. Clear/White: sanitizers destainer line.

3. Activate the prime switches for the three chemical pumps until product is
discharging into the machine.

4. To start the machine, close the doors - this will automatically start the machine. The
machine will run through its cycle.

5. Operate the machine one cycle and watch to ensure that the chemicals are
delivered and stop during the cycle. Remember: red tube - detergent: blue tube ­rinse: and clear/white tube - sanitizer. Check temperature at the end of the cycle for
140°F, 60°C.

The amount of product delivered by each cam is controlled by adjusting the cam’s
opening. When the micro switch rides down into the cam the peristaltic pump motor
begins to rotate. It will continue to rotate until it rides up out of the groove.
Therefore, to extend the amount of product delivered to the machine, open the
grove; to reduce the amount of product delivered to the machine, close the groove.
The cams are slip fit and a cam adjustment wrench is provided.

CAUTION: The motors on the new peristaltic pumps may be stalled by excessive tightening of
the cover plate screws. If a peristaltic pump does not turn when the micro switch is activated,
loosen the screws on the cover plate.

Technical personnel are available during normal business hours at CMA He adquarters should
you, as an installer, have any questions please call 800-854-6417.

MODEL CWS SERVICE & PARTS MANUAL Rev. 1.00 Page

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