12.1 The boiler must not be operated without water.
12.2 On completion of the boiler installation and
ensuring that all water connections are correctly
made the boiler may be filled with water via the filling
loop (not supplied with the boiler). Ensure that two
manual feed valves and boiler isolation valves are
open.
12.3 Release the cover cap of the boiler's automatic air
vent situated on top of the pump.
(Figure 17)
12.4 The manual feed valves must be closed and the
filling loop disconnected once the pressure gauge,
sited on the boiler’s control panel, indicates a system
pressure between 1.0 and 1.5 bar.
12.5 Check that all the water connections throughout
the system are sound and bleed each of the heating
system’s radiators in turn. As air is vented the system
pressure may need topping back up to 1.0bar.
12.6 Air must be vented from the boiler's pump by
unscrewing the pump’s integral vent plug and allowing
water to bleed for a few seconds. Take care not to
allow water to splash onto any electrical components.
12.7 When the system is bled of any air it must be re-
filled until the pressure shown on the display gauge
indicates a system pressure of 1.5 bar.
12.8 If the pressure shown on the gauge exceeds 1.5
bar discharge the excess pressure from the system via
a radiator valve or pipe connection. Do not use the
safety discharge valve as the valve seat may become
contaminated with debris and fail to re-seal.
Figure 18
1-
Timer
2-
D.H.W. temperature control
3-
Function switch
4-
C.Heating temperature control
5-
System pressure gauge
6-
LED display
13.1 Central heating and D.H.W. temperature controls:
The boiler's integral control unit monitors and adjusts
both the boiler’s hydraulic circuit and D.H.W. water outlet
temperatures by means of sensors located on the
Central/heating and D.H.W. flow outlets. The sensors
electrical resistance, which is dependant on temperature,
determines the current passing through the control
potentiometers located on the control panel.
The
respective potentiometer control dial allows manual
setting of the maximum required temperature (reference
value) being between 30º and 85ºC for C/heating and 35º
and 64ºC for D.H.W. When the boiler operates in heating
or D.H.W. mode, the current received is compared to the
manually set reference value. The difference of the two
values operates the modulation of the gas valve adjusting
the useful heat output generated and stabilising the
temperature to within ±1ºC.
13.2 Re-set function: Should the boiler lock out at
any time, please check the gas supply and ionisation
probe position, the boiler may be re-started by
switching to standby “O” position (
Switch 3 figure 18 )
waiting 15-30 seconds and switching back to its
previous
position
once
the
fault
has
been
eliminated.
13.3 Function switch: The three position switch
allows the boilers operation to be set to 'Stand-by’
(centre position), ‘H D.H.W.’ (left hand
position) or ‘D.H.W. only’ (right hand position)
12. Filling the System
Release the cover cap
(behind the pump) when
the filling complete
Figure 17
13. Control Panel Functions
Page 17
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18
17
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15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
24
23
bar
1
2
3
4
bar
0
1
3
4
2
6
5
ON
bar
Boiler Stand-by
Indicator
Water
Temperature
Flashing
Fault on CH
sensor
Flashing
Fault on
Outdoor sensor
Flashing
Fault on Air
Pressure Switch
Flashing
Flames or Gas
Failure
Flashing
Fault on
DHW sensor
Flashing
Low System
Pressure
Flashing
Overheat
Themostat
30
40
50
60
70
80
90
bar
17