Washtech CD 200 ST User manual

CD 200 ST
RACK CONVEYOR DISHWASHER
ServiceManual

Foreword
User documentation
Please read this manual and keep it in a safe place for future reference.
WARNING
Before installation and commissioning, you must read the safety
instructions and warnings carefully and all the warning labels attached to the
equipment.
IMPORTANT
Failure to comply (even partially) with the instructions given in this manual
will invalidate the product warranty and relieves the manufacturer of any
responsibility.
IMPORTANT
The alteration of machine operation, design or the replacement of parts not
approved by the manufacturer may void warranties and approvals.
Warranty Registration
Complete the information below for quick reference.
Model Number_______________Serial Number________________
Purchased from______________ Date of Purchase______________
If you require further information regarding authorised service providers or
recommended detergent suppliers in your region, or have any other queries,
please do not hesitate to contact us.
IMPORTANT
TO VALIDATE YOUR WARRANTY, PLEASE COMPLETE AND
RETURN THE WARRANTY REGISTRATION CARD WITHIN 30
DAYS FROM THE DAY OF PURCHASE.
Information supplied in this manual is copyright. No part of this work may be reproduced
or copied in any form or by any means, electronic or mechanical without the express
permission of the author / publisher. Document subject to change without prior notice.
!
!
!
Service Manual CD200L 6SD AS(S) 2 Revision 1A

Contents
Safety Instructions .......................................................................................................................................................................4
Installation.........................................................................................................................................................................................5
Installation Diagram ............................................................................................................6
Operation ...........................................................................................................................................................................................7
Description of Controls......................................................................................................7
Operating instructions.........................................................................................................7
Performance.....................................................................................................................................................................................8
Maintenance ....................................................................................................................................................................................9
Troubleshooting Chart.......................................................................................................................................................... 10
Electrical Components.......................................................................................................................................................... 11
Location and Access..........................................................................................................11
CD200 Eco Rinse Tank....................................................................................................12
CD200 Steam Heating ......................................................................................................13
Pressure Switch ..................................................................................................................14
Pressure Switches-Adjustment.........................................................................................15
Rinse Thermostat...............................................................................................................16
Wash Thermostat...............................................................................................................17
Solenoid Valve....................................................................................................................18
Wash Pump.........................................................................................................................19
Pre-Wash Pump .................................................................................................................20
Drive Motor........................................................................................................................21
Electrical Diagram ................................................................................................................................................................... 22
Schematic Diagram............................................................................................................22
Assembly Diagrams ................................................................................................................................................................ 23
Wiring Tray Assembly.......................................................................................................23
Control Panel Assembly ...................................................................................................24
Wash System.......................................................................................................................25
Pre-Wash System ...............................................................................................................26
Wash Upstand ....................................................................................................................27
Pre-Wash Upstand.............................................................................................................28
Drain/Overflow Diagram ................................................................................................29
Rinse System.......................................................................................................................30
Solenoid Valves Assembly................................................................................................31
Rinse Aid Tee Assembly...................................................................................................32
Conveyor Assembly...........................................................................................................33
Drive Shaft Assembly........................................................................................................34
Upper Drive Assembly......................................................................................................35
Final Drive Assembly ........................................................................................................36
Torque Limiter Assembly.................................................................................................37
Spare Parts...................................................................................................................................................................................... 38
Accessories..................................................................................................................................................................................... 40
Revisions.......................................................................................................................................................................................... 41
Service Manual CD200L 6SD AS(S) 3 Revision 1A

Safety Instructions
WARNING
Equipment contains dangerous voltages and can be hazardous if installed or
operated incorrectly. Non-compliance with Warnings or failure to follow
the instructions contained in this manual can result in loss of life, severe
personal injury or serious damage to property.
Installation
♦Use qualified, skilled personnel
♦Follow installation instructions
♦Connect to correct voltage and supply current
♦Provide fully accessible Electrical Isolation Switch
Training and Supervision
♦Read and Understand the Operating instructions
♦Train all staff.
♦This appliance is not intended for use by young children, who must
be supervised to ensure they do not play with the appliance.
♦This appliance is not intended for use by infirm persons without
supervision
♦This appliance is not intended for use as a stepladder
Hot Surfaces
♦Be aware some surfaces can be hot.
Chemicals
♦Commercial dishwashing detergents are hazardous
♦Read and follow the safety information found on the labels of
detergent containers and Material Safety Data Sheets
♦Handle with care
♦Use protective eyewear and clothing if decanting containers
Hot Water
♦Door safety switches are designed for emergency use only.
♦Wait for the green cycle light to go out before opening the door.
♦Wash water is 60°C and contains caustic detergent so DO NOT put
hands in wash water.
Cleaning
♦DO NOT hose down the machine or splash water over the exterior.
♦Watch for broken glass etc when cleaning the inside of the machine.
Service Manual CD200L 6SD AS(S) 4 Revision 1A

Installation
WARNING
Installer must be suitably qualified and ensure compliance with all local codes and
standards including AS/NZS 3500.1.
Failure to comply even partially with installation instructions may void the
warranty.
Install machine on sound waterproof self-draining floor and use adjustable feet to
level machine. Bench work detail drawing available on request.
Allow room for detergent to one side of machine or in adjacent cupboard. 20litre
container requires about 450H x 250W x 350D, but smaller containers are available
from many suppliers.
Water Supply Hot
Temperature Hot 65°C ± 5°C
Connection 15 mm (1/2” BSP Male)
Consumption 300 litres per hour approx.
Pressure 200-400 KPa (30-60 Psi) – above this range fit pressure
limiter
Water Supply Cold
Connection 15 mm (1/2” BSP Male)
Pressure 200-400 KPa (30-60 Psi) – above this range fit pressure
limiter
Flush supply lines before connection.
Do not use small diameter plastic supply lines.
Waste Connection 40 mm, direct waste pipe behind machine or through
open base – refer points B on installation diagram
Power Electrical supply must be 3 Phase, Neutral and Earth 400/415V 20A 50Hz.
Permanent wiring via wall switch to point C on installation diagram. Wash pump
rotation must be checked after installation to ensure correct direction (causes
excessive noise and damage)
Steam Connection 15 mm (1/2” BSP Male)
Pressure 100-200 KPa (1-2 Bars) with recommended operating
pressure of 1.5 Bar
Commissioning Procedures
Connect all services as above. Ensure that all internal components such as filters
and drain upstands are in place. Turn on water and switch on power. Close
machine door and switch machine on, machine will fill. When water sprays from
rinse arms inside machine, switch machine off at wall. Remove lower front panel
and switch commissioning switch by breaking label over same. Close panel and
switch machine on. Machine is now ready for use – refer operating instructions.
Detergent Pump
Refer your professional chemical supplier for advice on wash and rinse chemicals
and dispensers.
!
!
Service Manual CD200L 6SD AS(S) 5 Revision 1A

Service Manual CD200L 6SD AS(S) 6 Revision 1A

Operation
Description of Controls
Operating Instructions
Start up Fit drain upstands, wash pump filters, scrap trays and shut doors.
Turn wall and machine power switches on.
Power light glows red and machine fills automatically.
When wash tanks are full, filling automatically stops.
Ready light glows amber when the machine is up to required temperature.
Operation Press Start button to operate machine.
Green Cycle light glows during an operation.
When Ready light is illuminated racks can be fed into the machine.
The pumps will stop operating after about 2 minutes if there are no racks in the
machine. When rack is fed into machine the pumps will start automatically.
NOTE: Conveyor will not operate unless amber Ready light is illuminated.
Shut down every night
Press Stop button.
Turn machine and wall power switches off.
Remove scrap trays and rinse clean.
Remove drain upstands to drain tanks.
Remove wash pump inlet filters and rinse clean.
Replace drain upstands, filters and scrap trays.
NOTE: Shortest upstand into Ecowash (exit end).
Shorter upstand into pre-wash tank (entry end).
Service Manual CD200L 6SD AS(S) 7 Revision 1A

Performance
Hot Water Supply
An adequate supply of water at the correct temperature and pressure is essential
for effective operation of your machine. Refer Installation information for detail.
Water softening is recommended in hard water areas - especially for glasswashing.
Pre-rinsing Pre-scraping of dishes is required by Food Hygiene Regulations. The best method
is to pre-rinse with warm water with a Fisher Pre-rinse Unit - or alternatively by
scraping or dunking in water. Cutlery should be pre-soaked in warm water,
preferably containing cutlery pre-soak compound - refer your chemical supplier.
Racking Procedures
Do not overload racks or cutlery containers, minimise the overlap of crockery.
Cycle times are short and water consumption per cycle low - so there is no
advantage in overloading racks.
Cycle Times For multi-cycle machine use the longest cycle whenever possible. Note that water
consumption does not increase with longer cycles. Only switch to faster cycles
when it is necessary.
Detergent Use of correct type and quantity of detergent is essential to the performance of the
machine. Low foam specialty products are recommended. We strongly
recommend that you use a professional dishmachine chemical supplier - and will
be pleased to recommend a supplier in your region. Discuss with them the use of
cutlery pre soak solution, detergent and drying agent.
Drying Single tank commercial dishwashers do not have a drying cycle. However, the
machines do rinse at high temperatures which promote fast drying particularly
when drying agents are used. We recommend prompt removal of the rack from
the machine - leave the rack on the bench for 2 to 3 minutes before emptying.
This time will be reduced with correct use of drying agent (rinse fluid) which
reduces water surface tension and allows water to drain quickly from wash ware.
For advice on drying agents and injectors refer to your chemical supplier.
Daily CleaningIt is essential that the machine is drained and cleaned at the end of each day. Drain
the machine then remove, clean and replace filters as per the operating
instructions. Regularly check the wash and rinse jets and clean them if necessary –
refer Maintenance section.
Service Manual CD200L 6SD AS(S) 8 Revision 1A

Maintenance
Regular Cleaning
1. Remove upstandXto drain wash tank. Remove scrap traysYand wash pump
inlet filterZ. Clean them with water and a brush to clear grids.
2. Remove wash arms[– lift to unhook and then withdraw. Remove rinse arms\
– twist and withdraw. Flush arms with water using a toothpick or paperclip, if
necessary, to clear jets.
\
[
[
Y
\
Z
X
Regular Servicing
Regular servicing of the dishwasher is essential to keep the machine in top working
condition and get the best performance results.
Please contact your Service Provider to organize regular servicing of the
dishwasher.
Service Manual CD200L 6SD AS(S) 9 Revision 1A

Troubleshooting Chart
PROBLEM POSSIBLE CAUSES REMEDY (Check/Adjust/Replace)
Rack/s not moving
Rinse Temperature too low Check incoming water
temperature. Recommended 65°C
Incoming water pressure too
high
Fit pressure limiting valve to suit
200 – 400 kPa
Clutch set too light for load
Tighten clutch, refer drawing
600 90052
Limit switch activated
(if fitted)
Remove rack / adjust
Pawl bar jammed
Remove obstruction
Wash pump stops
Upstand not secure
Re-fit upstand
O-ring missing on upstand
(earlier models)
Replace O-ring ARP 027
Pump overload tripped
Adjust setting, confirm current
draw
Auto timer timed out ( if fitted)
Slide new rack in inlet end
Not rinsing
Rinse actuator not operating
Adjust switch / Remove
obstruction
Water isolating valve off
Turn on
Y filter blocked
Remove filter and clean
Rinse jets blocked
Remove arm and flush
Rinse arm not secure
Remove and relocate correctly
Service Manual CD200L 6SD AS(S) 10 Revision 1A