24
15. hOW yOUR ShOWER WORKS
1.
The cold incoming water is heated
instantaneously as it flows over
the heaters in the heat exchanger
assembly.
2.
At start up the seven segment display
will activate and display the outlet
temperature digit. For units with a
temperature start function set to
FIXED (Thermostatic Care in factory
default state), digit 8 (nominal 40 ºC)
will be displayed. For units set to
MEMORY temperature start function
(Thermostatic Plus by default) the last
used temperature digit will display.
A double bleep confirms to the user
when the outlet temperature has been
reached.
3.
The built in motorised flow valve
allows for automatic water flow control
ensuring thermostatic operation at all
times.
4.
When a maximum temperature
programme function is set, the
maximum temperature lock LED will
illuminate showing that this feature is
active.
5.
When pressing the warmer (+) and
cooler (-) push buttons the water
temperature set point is adjusted
automatically by the electronic control
and the seven segment display will
move one digit higher or lower.
6.
The amount of hot water available at
the set temperature is limited by the
total power of the heater.
7.
Audible bleep feedback to all push
button command is included (unless
de-selected at installation).
8.
The water is turned on and off by the
solenoid valve built into the shower
activated by the start / stop push button
on the front cover.
9.
The water flow, inlet and outlet water
temperatures are measured and
monitored to provide information to the
control PCB at all times the shower is
operating.
10.
A stabiliser built into the water flow
valve automatically compensates for
small fluctuations in water pressure
that frequently occur in households.
There are three further controls that
cater for exceptional restrictions in
water pressure to prevent the shower
from getting too hot.
a.
If the water flow is less than 2L/min the
power to the elements is switched off
but the solenoid remains on allowing
water to flow through the unit.
b.
If the outlet water temperature reaches
a level of 10 °C above the limit set
by the maximum temperature lock
programme the heating elements and
water solenoid are switched off giving
full shower shut down for ultimate user
protection. The display will show “o – t”
(over temperature). See 12 below for
further details.
c.
A two stage mechanical cut-out is
mounted on top of the heat exchanger
independent of the electronic controls.
Stage 1 switches the power off to the
elements if it senses an excessive
temperature. The switch operates
with an audible click and will re-set if
cold water is run through the shower.
Stage two only operates if an extreme
temperature is sensed. The cut-out
will permanently switch off and will
then have to be replaced. Due to the
