WATER FILL CIRCUIT
The operating conditions for regular operation of the water fill circuit are as follows:
3. Fill solenoid energized
12. Volumetric control reservoir empty
13. Reset solenoid energized
14. Pressure switch set to “empty” (1 - 2)
PATH OF WATER FILL
From the solenoid valve (3), the fill water passes across the air break (5) and descends through the resin
reservoir (10) and then to the volumetric distributor (11), where it is subdivided into two parts:
- A small quantity (1/6) of the total quantity of water is ducted into the reservoir of the volumetric control
device (12).
- The remaining water (5/6) passes through the ducts directly into the sump.
1/6 DISTRIBUTION OF WATER FILL
The water which is ducted into the volumetric control (12), when it reaches the “overflow” level (i.e. full),
activates the internal drain siphon, which ducts the water towards the bottom of the IWMS.
As the water passes through the duct, the flow generates a dynamic pressure in the pressure chamber of
the pressure switch (14); the pressure switch (electrical switching on full 1 - 3) disactivates the solenoid
valve and, at the same time, actions the power loads (motor and heating element), thus allowing the
programme to continue.
At the end of the fill phase, or in any case before the commencement of a subsequent fill phase, the reset
solenoid is (13) activated (reservoir reset) in order to ensure that the reservoir of the volumetric control (12)
is completely emptied, since any water remaining in the reservoir may alter the quantity of water for the
subsequent fill.
5/6 DISTRIBUTION OF WATER FILL
Most of the water (5/6) coming from the volumetric distributor (11) flows into the sump through a single
open duct.
The channel connecting the two parts (IWMS - sump) also permits the following functions:
- Control of the level of water in the tub in order to maintain the level pressure switch actioned.
- Control of excess water level in the tub to action the anti-overflow device.
- Draining of the water during the drain phase in order to reset the devices (level - anti-overflow).
In order to guarantee the reliability of the functional systems, the constant presence of a strong water intake
flow serves to prevent possible blockage of the circuit by keeping the duct clean at all times.
In the section of the circuit between the air-break (5) and the resin reservoir (10), the chambers of the
regeneration reservoir (7) are filled (with natural water) through a calibrated valve (6) according to the
hardness selected by the regulator (4).
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