User guide

10
1. Water is heated instantaneously as it
flows over the heating elements in
the copper cylinder.
2. Your shower incorporates a pump
which boosts the incoming water
pressure to a level more suitable for
showering.
The motor is controlled by a switch
connected to knob “B”
3. The heaters are only switched on
when sufficient water is flowing.
This will happen when the motor is
switched on, and is done automatically
with a switch which works on water
pressure.
4. The water is turned on and off by
a tap that is built into the shower.
5. If the water supply falls below a set limit, the pressure
switch will operate and switch off the power to the elements.
6. 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 illuminate.
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.
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 8 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 cold water storage cistern
can vary considerably throughout the year from 5 to 3
0°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 “low 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.
HOW YOUR EXPRESSIONS 570 SHOWER WORKS
3
WARNING: ALL WIRING AND INSTALLATION MUST BE SUPERVISED BY A SUITABLY
QUALIFIED PERSON.
WARNING: DO NOT INSTALL THIS SHOWER WHERE IT MAY BE SUBJECTED TO
FREEZING CONDITIONS
We recommend that the installation is done in the following sequence.
a. Fixing the shower to the wall b. Plumbing c. Electrical connections d. Commissioning
a. FIXING THE SHOWER TO THE WALL
1. Position the riser rail at a convenient height for majority of users as detailed in Diagram 1a/b
and mark its position.
2. Position the heater so that the top of the unit is horizontal and level with, or a maximum of
0.3 metres (1ft) below the top of the riser rail. Choose a flat piece of wall to avoid the
possibility of distorting the backplate thus making the front cover a poor fit.
3. Adjust the position to get the most convenient arrangement taking the following into account.
• The heater must not be mounted in the direct spray from the handset.
• The handset must not be able to come into contact with used water in the cubicle, bath or
basin. If it can, even after the hose has been retained by the soap dish (see Diagram 10a/b),
a vacuum breaker must be fitted (available from us).
4. Fix the riser rail with screws provided. The fixing holes at the base of the brackets will be
revealed by removing the plastic fronts. Assemble as shown in Diagram 10a/b.
5. Decide the position of the electrical cable into the unit.
If top or bottom entry is chosen, cut away the walls in the backplate as shown in Diagram 3.
6. Decide the position of entry of the cold water pipe into the unit.
If top or bottom entry is chosen, carefully cut away the relevant walls of the backplate as shown
in Diagram 3.
If bottom entry is chosen, refer to note 5 in the plumbing section.
HOW TO INSTALL YOUR EXPRESSIONS 570 SHOWER