VORTEX AIR Technical Manual
Revision 6- Issued by N. Shields 24/08/2023
3.6. Water Inlet & Drainage Requirements
The machine should be connected to a suitable cold water supply as follows:-
The connection to the machine water tank is made at the rear of the machine on the top left hand
side corner of the machine. It is a standard connection to a ¾” BSP male fitting. Flow rate should
be 18 litres per minute minimum.
Note: The inlet flow valve is supplied already fitted with a flow restrictor (brown) in place. The
restrictor should be left in place on tank fed installations with heads above 50ft or mains fed
installations with pressures above 1.5 bar (25psi). In all other circumstances the flow restrictor is
not required. The unit has a maximum operating pressure of 600kPa.
Points to watch:
Ensure that the supply line to the unit is not less than 15mm - larger if available head is low.
Ensure that the water supply cannot be starved by any other fittings.
Fit an easily accessible, full way isolating valve close to the unit. For installations with dirty
water supplies it is recommended that an in-line filter is fitted.
Fit an adequate backflow prevention device to the inlet water supply hose suitable for the
cross connection hazard to the inlet water supply hose in accordance with AS/NZS 3500.1 and
NCC PCA 2022
The drain is connected by inserting a 2” (50mm) pipe into the P-Trap and tightening the
compression fitting provided. Please note there is a P trap integrated into the machine so an
external one is not required.
▪ Ensure that the water supply line to the unit is at no point less than 15mm in diameter - larger if available
head is low.
▪ Ensure that the water supply cannot be starved by any other fittings.
▪ Fit an easily accessible, full way isolating valve close to the unit.
▪ For installations with dirty water supplies it is recommended that an in-line filter is fitted.
▪ Ensure that the route taken to soil drain is the shortest, with minimum number of bends.
If necessary, use long radius or ‘swept’ bends - never short or 90’ elbows.
▪ The waste must be run separately to the soil stack or drain.
▪ Ensure that there is a fall of a minimum of 1 in 25 or a sufficient fall to maintain a self-cleansing velocity.
▪ Provide easy access for roding/drain cleaning.
▪ Ensure a clean run inside the pipework - leave no burrs or reducing shoulders.
▪ With plastic pipework, ensure that there is no reduction in the bore size and that there is adequate support
for long distance pipe runs to prevent sagging. Remember, ceiling voids can get very warm.
▪ Avoid running the drain line near or across hot water pipes.
▪ Anti-syphon precautions should be in line with general practice.
▪ If all of the above has been noted and the water pressure remains below 18l/min a booster pump may be
required, this will prevent excessive waiting time between cycles (2 min time-out for water fill before an
error is shown).
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