Washtech 3 Series User manual

PW2Series 3
PASSTHROUGH WAREWASHER
ServiceManual

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.
We have checked that the contents of this document correspond to the model described. There may be
discrepancies nevertheless, and no guarantee can be given that they are completely identical. The information
contained in this document is reviewed regularly and any necessary changes will be included in the next
edition. We welcome suggestions for improvement.
Document subject to change without prior notice.
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.
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Contents
Safety Instructions ...........................................................................................................................................................................4
Installation ...........................................................................................................................................................................................5
Installation Diagram ............................................................................................................6
Installation Checklist ...........................................................................................................7
Maintenance Checklist ........................................................................................................8
Operating Instructions..................................................................................................................................................................9
Dishwashing Procedures .......................................................................................................................................................... 10
Troubleshooting Chart............................................................................................................................................................... 12
Components .................................................................................................................................................................................... 14
Location and Access..........................................................................................................14
Timer....................................................................................................................................15
Rinse Thermostat...............................................................................................................16
Wash Thermostat...............................................................................................................17
Solenoid Valve....................................................................................................................18
Pressure Switch ..................................................................................................................19
Wash Pump.........................................................................................................................20
Detergent Pump.................................................................................................................21
Assembly & Electrical Diagrams.......................................................................................................................................... 22
Wiring Tray Assembly.......................................................................................................22
Control Panel Assembly ...................................................................................................23
Wash Assembly ..................................................................................................................24
Rinse Assembly ..................................................................................................................25
Rinse Tank Assembly ........................................................................................................26
Solenoid Valve Assembly .................................................................................................27
Schematic Diagram............................................................................................................28
Wiring Diagram..................................................................................................................29
Spare Parts ........................................................................................................................................................................................ 30
Accessories ....................................................................................................................................................................................... 32
Appendices....................................................................................................................................................................................... 33
Rinse Aid Injector Kit .......................................................................................................33
Drain Pump Kit .................................................................................................................34
Revisions............................................................................................................................................................................................ 35
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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
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Installation
WARNING
Installer must be suitably qualified and ensure compliance with all codes and
standards including AS/NZS3500.1.
Failure to comply even partially with installation instructions may void the
warranty.
Positioning Unpack machine, check for damage and complete delivery. Install machine on
sound waterproof self-draining floor and use adjustable feet to level machine.
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.
Benchwork Refer to the installation diagram. Recommended bench depth is 850 mm, height
900 mm. We recommend sink smaller than rack with guide to prevent rack falling
into sink. Align sink with dishrack path as shown on the installation diagram.
Water Supply Hot water temperature 65°C ± 5°C
Connection 20 mm (3/4"BSP Male)
Flow rate minimum 20 litres per minute
Consumption per cycle 4 litres approximately
Backflow prevention Dual Check Valve fitted standard
Pressure 200-350 KPa = 30-50 Psi.
Above this range fit pressure limiter. Don’t use small diameter plastic supply lines.
FLUSH supply line before connection. Poor quality supply or excessive water
hardness may affect performance or damage machine – filtration and/or softening
is recommended.
Waste 40 mm gravity drain – refer point B on installation diagram – run waste directly
behind the machine.
Power Machine requires 3 Phase, Neutral and Earth, 415V, 50Hz, 18kW, 27A/ph,
permanently wired via wall switch mounted adjacent to machine. Wash pump
rotation must be checked after installation to ensure correct direction (excessive
noise and damage with incorrect direction).
Detergent Insert detergent pump inlet hose into container of commercial low foam detergent.
Open machine door and switch machine on. Press and hold detergent prime
switch behind front cover until chemical flows into machine.
Commercial detergents can be hazardous – read instructions and handle with care.
Installation Checklist
Complete attached Installation Checklist to ensure machine is installed and
running correctly, and operator is familiar with operating procedures.
Troubleshooting
If the machine doesn’t fill after switching on the power, check and ensure that the
hot water supply tap is open, water supply pressure is not below specification and
Dual Check Valve is correctly installed (arrows on the dual check valve’s body
specify water flow direction).
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Installation Checklist
CHECK OK / NOTES
Delivery
Supplied complete no transit damage
Position
Level and stable on sound, waterproof, self draining floor
Water
Isolator valve fitted Accessible, all fittings sound, no leaks
DCVs fitted (Washtech only) Correct direction
Temperature 65 ± 5°C
Flow rate Minimum 20 litres per minute
Pressure 200-350 kpa, limiter fitted if above this range
Booster fitted if below this range
Cold water when required Pressure not above 350 kpa
Hardness Filter or softening if required
Power
Isolating switch Fitted, functional and accessible
Supply as specified Voltage, current, circuit breaker
Waste
Usually 40 mm Sound, no leaks
Air gap on pumped drain
Chemicals
product name container no leaks primed conc.OK
Detergent
RinseAid
Machine operation
Run several cycles
Confirm correct operation Including correct fill levels
Operator training
Confirm Operator has copy of Operator Manual and is familiar with procedures
Start-up Model / Serial
Pre-rinse and racking Owner
Machine operation Location
Drain Technician
Clean Date
Shut-down Signed
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Maintenance Checklist
CHECK OK / NOTES
Installation – use Installation Checklist on previous page to check all services, operator training
and chemical issues
Services water, power, drain etc.
Operator trained / has instructions
Chemicals squeeze tube checked – replacement
recommended every 6 months,
product type, container, leaks etc.
General conditions
Cleanliness of machine daily maintenance
Presence of pests
Leaks
Operation
Temp °C Amps
Elements Wash 60
Rinse 83
Pumps Wash n/a
Rinse n/a
Drain functional n/a
Water Flow Wash arms and jets jets clear, good rotation, bushes OK
Rinse arms and jets jets clear, good rotation, bushes OK
Cycle Fill levels pressure switch settings
Drain operation upstand/pump
Noise sounds OK
Recovery between cycles
Controls Door switch including auto start if fitted
Switches, lights, gauges all sound and functional including door/s
Performance Wash and rinse effective
Electrical
Safety test if required
Cabinet
Door / Handle / Catch operational
Rack slide good rack entry / withdrawal
Comment / Action Required
Model / Serial Technician
Owner Signed
Location Date
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Operating Instructions
Start up
Fit drain upstand, wash pump filters,
scrap trays and shut door.
Turn wall power switch on and select
any cycle (1, 2 or 3).
Power light glows red and machine fills
automatically.
Wash Ready light (water symbol) glows
amber when wash tank is ready.
Rinse Ready light (tick symbol) glows
amber when the machine is up to
required temperature and ready to run.
Operation
Select required cycle (1, 2 or 3 for
2, 4 or 6 minutes cycle accordingly).
Try cycle 3 initially and switch to faster
cycles only if necessary.
Load rack into machine and close door.
Press Start button to start the machine.
Cycle light glows green while machine
operates.
When Cycle light goes out, cycle is
complete.
Open door and remove rack.
NOTE: Machine will not operate unless
Ready lights are on.
Shut down every night
Turn machine and wall power switches off.
Remove drain upstand to drain wash tank.
Remove scrap trays and wash pump filters and rinse clean.
Replace drain upstand, filters and scrap trays.
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Dishwashing Procedures forbest results
Note: these are general instructions to assist in getting the best performance from Washtech dishwashers –
some comments and / or illustrations may not apply to every unit.
Installation
Read the Operator Manual. Correct installation, including an adequate supply of
water at the correct temperature and pressure is essential for effective operation of
your machine. Refer installation instructions for details. Drain hose outlet height
is important on some models. Always install on a sound self-draining floor.
Water softening is recommended in hard water areas - especially for glasswashing
Pre-rinsing
Pre-scraping of dishes is required by hygiene regulations.
The best method is to pre-rinse with a pre-rinse spray unit -
or alternatively by scraping or dunking in water.
Cutlery Procedures
Pre-soak cutlery in warm water, preferably containing cutlery
pre-soak compound - refer your chemical supplier.
Do not overfill cutlery containers. Cutlery should be loose with
handles down. Sort after washing rather than before. Cutlery
of only one type nests together and obscures wash water.
Racking Procedures
Do not overload racks, minimize 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 choose shorter, faster
cycles when necessary.
Detergent
Use of correct type and quantity of low foaming commercial grade
detergent is essential to the performance of the machine. 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.
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