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4 ELECTRICAL INSTALLATION
WARNING
4.1 This appliance must be earthed.
4.2 The installation must comply with the
Building Regulations Part P. Where there
is a new installation, or a replacement
product is not identical to the one being
replaced, the cable sizes, circuit protective
devices, bonding and other requirements
of the Building Regulations must be
assessed by a (registered) qualified and
competent electrician, who should carry
out the installation taking into account the
site conditions.
The following notes are for guidance only:
4.3 The shower heater must only be
connected to a 230/240V ac supply.
4.4 Before making any electrical
connections within the installation,
make sure that no terminal is live. If in
doubt, SWITCH OFF the whole installation
at the consumer unit or switch fuse (where
fitted).
4.5 It is strongly recommended that a
30mA rcd is incorporated in the circuit,
even if it is not required to comply with BS
7671.
4.6 A double-pole isolating switch with a
contact separation of at least 3mm in each
pole, must be incorporated in the circuit.
This must have a mechanical indicator
showing when the switch is in the OFF
position. A neon lamp alone is not
sufficient.
Double pole isolating switch:
pull cord or wall mounted in accordance
with IEE regulations
RCD (can be part of the
consumer unit)
Shower unit
(use rear entry when it is possible)
80A or 100A main switch
Meter
Meter 'tails'
Consumer unit
Figure 7 Schematic of typical electrical layout
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5.48 The 'MED' and 'LOW' power settings
allow you to reduce the power used by the
heater and can be used at times of the
year when the inlet water temperature is
higher. They can also be used to obtain a
cooler spray without adjusting the water
control knob. A cold shower cannot be
obtained.
5.49 To stop the shower, press the
'START/STOP' button. The 'START/
STOP' and 'HIGH', 'MEDIUM' or 'LOW'
lights will go OFF. Water will continue to
flow for a few seconds and the 'PHASED
SHUTDOWN' light will flash. This allows
hot water to be flushed from the can.
When flow stops, turn off the isolating
switch.
USER PROTECT SYSTEM
5.50 The User Protect system is intended
to prevent showering temperatures
reaching harmful levels. To test its
operation, turn on the shower by pressing
'HIGH'. Turn the water control slowly
clockwise until the 'USER PROTECT' light
flashes. This indicates that if the water
temperature is not reduced soon the
shower will automatically switch to the next
lowest power setting. The shower will
remain at the new power setting until reset
by the user.
5.51 If the shower senses that the
temperature is rising too fast to prevent
the spray from becoming very hot, it will
automatically shut off the water flow. All
the temperature indicators and the
'PHASED SHUTDOWN' light will flash,
and the 'USER PROTECT' light will come
on steady. To reset see section 9 FAULT
FINDING, item 1F.
INSPECT HANDSET LIGHT
5.52 This product is fitted with an
electronic 'descale timer' which keeps
track of the total time the shower has run
since the timer was last reset. After a
certain number of hours has elapsed, the
'Inspect Handset' light will flash, indicating
that the shower head is probably now in
need of descaling. Depending on the
hardness of your water, a different duration
between cleaning will be needed, so there
is a facility to set the time duration after
which the 'Inspect Handset' light will go
on. This is called the 'descale time'.
SETTING THE DESCALE TIME
5.53 The descale time (the time duration
before the 'INSPECT HANDSET ' light
flashes) is set at the factory for hard water
areas, but it can be reset, as follows:-
1. Switch shower isolating switch OFF.
2. Press and hold button as listed below,
To
Press and hold in:
Set for VERY SOFT
water (approx. 90 hours)
'STOP' button
Set for SOFT water
(approx. 30 hours)
'LOW' button
Set for HARD water
(approx. 20 hours)
'MED' button
Set for VERY HARD
water (approx. 10 hours)
'HIGH' button
3. Turn shower isolating switch ON.
4. Then release the button.
5.54 The settings can be changed at any
time using the above procedure. This
does not automatically set the timer to
zero; if the system is changed to a 'harder'
setting, then the 'INSPECT HANDSET'
light may immediately flash on.
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