Atmos Multi 24/80, Installation & Servicing Instructions Manual, Page: 30 / 43

ATMOS MULTI version 2002 Page 30
8.1 Filling the heating system.
Warning! The Atmos Multi must not be operated
in a waterless condition.
On completion of the boiler installation and
ensuring that all water connections are correctly
made and tight, the boiler may be filled with clean
water by fitting the supplied filling hose and
opening the two Robokit manual filling valves. (fig
25)
Figure 25: Filling hose connection.
On filling:
q
Ensure that the boiler's automatic air vent
sealing cap is loose.
q
Slowly fill the installation until a system
pressure of 2bar is obtained.
q
Vent each system radiator and purpose fitted air
vent in turn starting with the lowest in the system.
The system pressure should be regularly monitored
during this process and topped up when required.
q
Air must be vented from the boiler pump by
unscrewing the pump’s integral vent plug (fig 26)
and allowing water to bleed for a few seconds,
taking care not to allow water to splash onto the
boiler's electric parts. This process may have to be
repeated two or three times during the filling
process.
Figure26: Venting the pump
q
Test the operation of the system’s outlet safety
valve by turning the valve knob anti-clockwise until
water is released, at which point the valve must be
closed and re -set.
q
Continue to fill the system until all air has been
expelled, leaving the system pressure at a nominal
2bar.
q
Check the system for water soundness,
rectifying where necessary and remove the system
filling hose.
Figure 27: Three-way valve
To aid filling the boiler is supplied with its integral
three way valve locked in the middle position. On
completion the valve must be unlocked by lightly