How Your Shower Works - Home of ultra AX301 Handbook

How your Shower Works

Your shower is designed for convenience, economy and safety of use.
1. Water is heated instantaneously as it flows over the heating elements in the copper cylinder (diagram 2)
2. The required water temperature is achieved by adjusting the rate of water flow. Diagram 3
shows the principle involved in relating temperature rise to flow rate. The higher the water
rate the lower the temperature rise and vice versa. The temperature of the water supplied
from the mains can vary considerably throughout the year from 5 to 20°C. This means
that in the winter, flow rate will be less than in the summer to achieve the same outlet
temperature. In summer the "HALF HEAT" power setting may give adequate hot water.
3. The heaters are only switched on when sufficient water is flowing.
This is done automatically with a switch which works on water pressure and is indicated by 2 or 3 lights illuminating
depending on knob "A" power selection.
4. The water is turned on and off by the solenoid valve built into the shower. This is switched on by button "B".
5. The flow of water is automatically held at the level set by the user even though the supply pressure may vary
(See "How to use your shower" note 10).
6. If the water supply falls below a set limit, the pressure switch will operate and switch off the
power to the elements. This is indicated by the middle power setting lights flickering and
going out (see "How to use your shower" note 11).
7. As a further safeguard, a thermal cut-out switches the power off if the water temperature
climbs above the set limit and the "OVERHEAT" light will come on.
This cut-out, which gives an audible click, may also operate due to residual heat when the
shower is switched off. It will reset itself if water is run through the shower for 10 to 20
seconds, and the "OVERHEAT" light will go out.
8. The pressure relief device is to safeguard against abnormal pressure conditions, and
provides a level of appliance protection should an excessive build up of pressure occur
within the shower.
9. There are a number of defined spray plate setting modes (patterns) adjustable by rotating
the spray plate (see diagram 4).
These modes (patterns) have a positive click to identify them.
The spray plate rotates through a full circle (360°) in either direction.
IN ORDER TO MAINTAIN THE PERFORMANCE OF YOUR SHOWER,
YOU MUST CLEAN THE SHOWERHEAD REGULARLY.
All water contains particles of lime-scale, which build up in the showerhead and unit reducing
the performance. It is therefore important to clean the showerhead by simply rubbing the
rubber nozzles, or soaking in a proprietary lime-scale remover and rinsing thoroughly before
use.
NOTE: After use it is normal for some water to drip from the showerhead for a few moments.
This inhibits lime-scale build-up over prolonged use.
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