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12. Filling the System
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).
valves and boiler isolation valves are open.
12.3 Release the cover cap on the boiler's
automatic air vent, located on top of the
internal pump (figure 16), when filling the
system.
Figure 16
Release the cover cap
(behind the pump)
When filling system
20
12.4 The manual feed valves must be closed
and the filling loop disconnected once the
pressure sensor, sited on the boiler's control
panel, indicates a system pressure of 1.5bar.
12.5 Check that all the water connections
throughout the system are sound and bleed
each of the heating system's radiators in turn.
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 the
system pressure must be topped until the
pressure LCD display indicates a system
pressure of 1.5bar.
12.8 If the pressure exceeds 1.5bar 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
Ensure that two manual feed
may become contaminated with debris and fail to
re-seal.
Important Note.
In order to maintain operation and the appliance's
warranty; after initial filling the heating system
must be thoroughly flushed using a propriety
cleanser
to
remove
contaminants and dosed with sufficient anti-
13. Control Panel Functions
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 C/heating and
D.H.W. flow outlets. The sensors convert the
water temperature into an electrical resistance that
is relayed back to the control potentiometers (2 &
3 figure 17) located on the control panel. The
respective potentiometer control dial allows
manual
setting
of
temperature (reference value) between 30º and
85ºC for C/heating and 35º and 64ºC for D.H.W.
When the boiler functions in heating or D.H.W.
mode, the resistance measured is compared to the
manually set reference value. The differential
determines 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 turning both the CH & DHW
to minimum, switching to the standby "O"
position and switching off at the fused spur or
socket (Switch 4 figure 7) waiting 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 - O) 'Heating +
D.H.W.' (left) or 'D.H.W. only' (right).
Page 20
solaris 24PC, 30PC
foreign
material
and
the
maximum
required
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