14
Water comes in through the inlet, via a flow switch.
The flow switch measures how much water is passing through the unit.
If it detects more than the preset level of:-
2.7 litres/minute for the 9.5kW model and 3.3 litres/minute for the 10.8kW.
The units heating elements are switched on. This is shown by the neon light glowing.
The water is heated instantly as it passes through the copper heat exchanger tube.
The temperature of the water coming out of the unit depends on:-
The temperature of the mains water supply
The water flow rate
The power consumption of the unit (power level selected)
The temperature of the main supply can vary from 5°C in winter up to about 20°C in summer, with
an average of about 12°C. The charts below show the water temperature (°C) you can expect from
the unit, at the different power settings for different flow rates in litres/minute.
9.5kW Powerstream-Eco
Flow rate
(litres/min.)
3.0
4.0
6.0
Power level
High Eco Low High Eco Low High Eco Low
Summer temp °C 65° 46° 40° 54° 39° 35° 43° 33° 30°
Winter temp °C
50° 31° 25° 39° 24° 20° 28° 18° 15°
10.8kW Powerstream-Eco
Flow rate
(litres/min.)
4.0
5.0
6.0
Power level
High Eco Low High Eco Low High Eco Low
Summer temp °C 58° 41° 37° 51° 37° 34° 46° 34° 31°
Winter temp °C
43° 26° 22° 36° 22° 19° 31° 19° 16°
The unit includes a dual thermal cut-out (diagram 10) which is attached to the heat exchanger tube.
It will switch off the heater elements if the water flow is reduced too much and the temperature goes
above a set limit.
The first stage cut-out is cyclic and will automatically
reset as the water temperature falls.
The unit will then function normally again.
The second stage cut-out when triggered needs to be re-set
manually inside the unit (diagram 10).
This cut-out will only operate in exceptional circumstances.
The unit can supply two outlets,
For example, a shower and a basin, or up to two basins
– but water from the unit will be shared between the outlets.
This is particularly important if a unit supplies a shower and a basin,
as the basin should not be used while someone is using the shower.
The unit is NOT to be fitted to a bath or kitchen sink other than for hand-washing purposes.
HOW YOUR
POWERSTREAM-ECO
WORKS
On average on “high”
(12°C main water supply
at 4 litres/minute)
an outlet temperature of
46°C will be achieved.
On average on “high”
(12°C main water supply
at 5 litres/minute) an
outlet temperature of
43°C will be achieved.
Diagram 10
Thermal Cut-Out