Part No. 5106463
5
Technical Data
Statesman System, Flowsure & F
Principal boiler components
Automatic and Manual Air Vents
Manual air vents are provided on the Flowsure and
F only.
Pressure Relief Valve
This is factory set at 3 bar (45 lb/in²).
Pump
An integral circulating pump is incorporated within
the boiler casing. This also serves the functions of
both the central heating circuit and domestic hot
water (Flowsure/F).
Expansion Vessel
A 10 litre expansion vessel, charged to 0.5 bar and
is suitable for a static head of 5 metres (16.5 ft), is
included within the boiler casing.
Diverter Valve
On the Flowsure and F, a motorised
diverter valve is located on the pump outlet. The
valve is normally closed to the central heating circuit
and is powered open when there is a demand for
central heating via the room thermostat.
Flow Switch
On the Flowsure and F, the domestic
mains water inlet is connected to a flow switch, this
detects when a domestic hot water tap has been
opened. This activates the burner and pump.
Domestic Service Cock
The domestic service cock fitted to the mains water
inlet of the Flowsure and Fl, incorporates
a pre-set flow regulation device, this restricts the
maximum flow of domestic hot water to the taps,
13 l/m and 17.5 l/m respectively.
Domestic Hot Water Heat Exchanger
On the Flowsure and F, a water to water
heat exchanger is located within the boiler casing.
Primary water is pumped from the boiler (heatstore
tank on F) to the heat exchanger whenever
there is a flow of domestic water through a hot water
tap. The domestic water thereby extracts the heat
from the plate heat exchanger giving mains
pressure domestic hot water. The domestic hot
water temperature can be increased by reducing
the water flow rate at the tap (Flowsure) or adjusting
the hot water mixing valve to a higher setting
(F).
Pump overrun
On the Flowsure and F, a pump overrun
facility has been incorporated into the electrical
control panel which allows excess heat to be
dissipated to either the central heating circuit or
boiler shell, dependant on mode selected. This
prevents the possibility of the boiler overheating.
Heatstore tank
On the F, the heatstore tank is a heatbank
containing 40 litres (8.8 gallons) of primary hot
water. The tank temperature is controlled by the
DHW thermostat to approximately 75 °C.
Note: A bypass system should be fitted between
the flow and return pipes, where primary water
flow may be prevented during a pump overrun
situation (Flowsure, F).
DHW Mixing Valve (F Only)
The DHW mixing valve is factory set to the mid
position, this will give a blended water temperature
of approximately 60°C. After removing the front
casing (Pull forward off the mounting clips), the
control knob (top right, behind control panel) will
be accessible and can be turned as required.
Clockwise to decrease and anti-clockwise to
increase temperature - See Fig. 4. for the position
of the valve.
MIN
Mid
Position
Fully
Open
Turn the
Control Knob
anti-clockwise
3 notches for
mid position
60˚ Approx.
+ Temp.
- Temp.
Turn the
Control Knob
anti-clockwise
3 notches for
fully open position
ST00193A
Fig. 1
