6/26/2019 Washtech TW Operator Manual 7
Chemical
•This dishwasher is supplied with Detergent and Rinse Fluid injector pumps
•To connect to chemicals, insert pump inlet hose into container of commercial low foam
detergent and rinse fluid.
•To prime the detergent, press the detergent prime switch on the machine control panel until
supply hose is refilled.
•To prime the rinse fluid, press the rinse fluid prime switch on the machine control panel until
supply hose is refilled.
NOTE: Externally adjustable chemical pumps are fitted and pre-set at an average level,
these need to be calibrated on site according to the chemical being used and site specific
conditions such as the water quality and how the machine is being used. Failure to do so
may result in excessive dosing which can result in foaming and overflowing, or
insufficient dosing which can cause inferior wash results and impact components
through a build up of grease. If in doubt, contact your chemical company for assistance.
NOTE: Commercial detergents can be hazardous – read instructions, store safely and
handle with care. Care needs to be taken when changing chemicals, ensuring that the
detergent is not accidentally connected to the rinse fluid inlet line.
NOTE: If uncertain, please consult a chemical specialist for assistance in selecting the
right chemicals and calibrating machine settings to suit this along with your unique site
conditions and requirements.
Waste
•A drain pump and drain vent loop are fitted standard on this machine.
•The recommended installation of the drain hose is into a standpipe.
•For drain hose installation into a standpipe, the hose should be lifted no higher than 350mm
above the machine base to avoid water returning to the wash tank after draining.
•For drain hose installation into a sink waste connection, the drain hose must be secured to a
point at least 50mm higher than the sink drain connection. This will avoid water potentially
back-flowing from the sink into the dishwasher. For undercounter installed machines with a
sink waste connection a small amount of water will return to the wash tank after draining.
NOTE: Failure to correctly connect the drain hose and ensure correct plumbing is in
place beyond this may result in blockages, backflow from the sink and/or flooding of the
machine.
NOTE: Either copper or P.V.C. may be used for the waste connection – P.V.C. is more
resistant to some harsh detergents. Some authorities however suggest that copper is
required because the machine rinses at up to 90°C. It is important to note that rinse
water mixes with the 65°C wash water before discharge and then flows into the sink
trap where the water is further cooled before entering the drainage plumbing. We
recommend consulting your local authority to ensure your site remains compliant.
Installation Checklist
•Complete attached Installation Checklist to ensure machine is installed and running correctly,
and operator is familiar with operating procedures.
Installation Instructions
