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PROFESSIONAL SERVICE
If the previous 'Self Help' checks fail to restore
the performance, you should seek professional
help.
The person who installed the shower is probably
the best one to investigate and correct it and is
certainly the person to contact if you have had a
problem in the guarantee period.
The following additional checklist is provided for
the benefit of the qualified service person.
WARNING:
SWITCH OFF THE ELECTRICITY
AT THE LOCAL ISOLATOR
BEFORE REMOVING THE COVER
TO MAKE CHECKS.
Water flow restricted by blockage
Water
in filter housing.
too
Switch off water, remove filter cap
HOT
check and clean metal inlet filter.
Check circuit through
thermal cut-out.
Check circuit through
Water
microswitches on the pressure
too
switch.
COLD
Check each element circuit.
Check tightness of electrical
connections.
Undo headworks of stabiliser valve
No
water flow
Check stabiliser is in place and
control
remove any debris in valve.
Check for cause of high pressure
Water
and remove it.
discharge
Blockage on outlet e.g. blocked
from
pressure
shower handset.
relief valve
Replace the pressure relief device.
Water does
Check circuit through solenoid coil
not flow
& switch. If defective then replace.
when
button 'C'
is pressed.
1. Water is heated instantaneously as it flows
over the heating elements in the heat
exchanger (fig.15).
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 built into the shower.
This is switched on when Button 'C' 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 'Advice to Users').
5. If the water supply falls below a set limit, the
pressure switch will operate and switch off
the power to the elements, resulting in a cold
shower (see 'Advice to Users' on page.2) .
6. As a further safeguard, a thermal cut-out
switches the power off if the water
temperature climbs above the set limit and
the 'auto reset' 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 'auto
reset' 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 up 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.
The diagram 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.
11
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