14
1.
Water is heated instantaneously as it flows
over the heating elements in the copper
cylinder (Diagram 9).
2.
The heaters are only switched on when
sufficient water is flowing.
This is done automatically with a switch
which works on water pressure.
3.
The water is turned on and off by the
solenoid valve
(and Timer PCB on
10.5kW models)
built into the shower.
This is switched on when button “B” is
pressed.
4.
The flow of water is automatically held at
the level set by the user even though the
supply pressure may vary (see “Effect of
Other Water Devices on Incoming Water
Supply”).
5.
If the water supply falls below a set limit,
the pressure switch will operate and
switch off the power to the elements. (see
“Effect of Other Water Devices on Incoming Water Supply”).
6.
As a further safeguard
, a thermal cut-out switches the power off if the water temperature
climbs above the set limit.
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.
7.
The pressure relief device is to safeguard against abnormal pressure conditions, and provides a
level of appliance protection should an excessive build of pressure occur within the shower.
Effect of Seasonal Incoming Water Temperature Changes
The required water temperature is achieved by adjusting the rate of water flow.
Diagram 10 shows the principle involved in relating temperature rise to flow
rate. The higher the water rate the lower the temperature 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 Medium
(2 red bands)
power setting may give adequate hot water.
In some
winter
conditions, it may be necessary to select the
inner or outer spray pattern
only of
your shower handset. This will ensure correct operation of the shower with a slightly lower flow rate.
Effect of Other Water Devices on Incoming Water Supply
Your shower is
designed to stabilise temperature
changes caused by water pressure
fluctuations. These can result from toilets being flushed or taps being turned on and off.
When this happens your showering temperature will be held within a controlled band, provided that
the minimum pressure required by the shower is maintained.
Your shower requires a minimum running pressure of 69kPa (0.7 bar, 10 psi).
At pressures above 69kPa (0.7 bar, 10 psi) it will minimise temperature fluctuations as detailed
above. If the water pressure falls below 69kPa (0.7 bar, 10 psi) it is likely that the pressure switch
will turn off the power to the heating elements, resulting in a cold shower.
HOW YOUR
AquaNoir
SHOWER WORKS
Diagram10
3
INTRODUCTION
If you experience any difficulty with the installation or operation of your new
shower, then please refer to the “What to do if things go wrong” section in this
manual before contacting us.
Thank you for purchasing a quality
Creda AquaNoir
shower manufactured in England.
To enjoy your new shower at its best, please take time to read this manual thoroughly to
familiarise yourself with all instructions, BEFORE beginning installation.
Having done so, keep this manual handy for future reference.
The
Creda AquaNoir
is an electric shower incorporating our unique
“Backlit LED light feature”
with a
“
Set and Forget
” function of a push-button start/stop facility which starts the shower at a pre-set
power and flow rate reducing the amount of adjustment required.
Your shower is designed to stabilise temperature changes caused by water pressure fluctuations.
These can result from toilets being flushed or taps being turned on and off.
When this happens, your showering temperature will be held within a controlled band, provided that
the minimum pressure required by the shower is maintained (see “Effect of Other Water Devices”).
1.
Your shower has been designed for convenience, economy and safety of use, provided that it is
installed, used and maintained in good working order and in accordance with our instructions and
recommendations.
2.
All wiring and installation must be supervised by a suitably qualified person.
3.
THIS APPLIANCE MUST BE EARTHED.
4.
The installation must be in accordance with the current edition of BS.7671 (
the “IEE Wiring
Regulations”)
and “Part P” of the
“Building Regulations”
in force at the time of installation.
Installations outside of England and Wales must also conform to any local regulations in effect.
This appliance is intended to be permanently connected to the fixed electrical wiring of the mains
supply with its own dedicated supply.
5.
This appliance must
NOT
be fitted where it may be subjected to freezing conditions.
6.
DO NOT
switch the appliance on if you suspect it of being frozen.
Wait until you are sure it has thawed out.
7.
DO NOT
fit any sort of tap or control on the appliance outlet.
The appliance is designed to have an open outlet and should only be used with “Creda”
recommended fittings.
8.
The shower handset provided is designed to work with electric showers.
Only use the manufacturers approved accessories with this shower.
9.
Take care to avoid restricting the outlet of the pressure relief device.
If water is discharged from the pressure relief device, maintenance will be required before the
appliance can be safely used.
10.
Isolate the mains electrical and water supply before removing the front cover of the appliance.
IMPORTANT SAFETY INFORMATION