Fig. 29. Filling the System - Typical
I-52
B-070343_EN • B
c
ommIssIonInG
Filling the System
Safety Instructions Before Start-up
Once the initial start-up process is
complete, fill in the installation check-
list with all the relevant information on
the system for future reference. Refer
to
“Installation Checklist” on page
I-78.
i
Before starting the appli-
ance, check that the heating
circuit is full of water and the
appliance is supplied with
gas and electrical power.
Check that the gas pressure
is within the allowed range.
Check that the water pressure is suffi -
cient (at least 1.2 bar when cold). Low
water pressure is detected by the ap-
pliance sensor and will be indicated on
the control panel display. Top up the
circuit as required.
In case of repeated indication of low
pressure in the water circuit, check for
leaks and repair as required.
Once the fi lling of the heating circuit is
complete, close the fi lling valve.
Check that all connections (electrical,
fl ue pipe, hydraulic, gas) have been
carried out and that they are tight and
secure.
Ensure that the condensate trap is full
of water before starting up the appli-
ance.
Conditions:
Procedure:
1. Connect the fi lling hose (
) to the system
fi lling valve (
) and to the water network tap.
2. Make sure that the draining valve
(
) is closed.
3. Open the isolating valves (
).
4. Open the fi lling valve (
) and the water net-
work tap.
5. Bleed the air from the system and bring the
system pressure at minimum 1.2 bar.
Pressure should be suitable for
the size/height of the heating sys-
tem and take into account the
pressure rating of the safety valve.
6. Close the fi lling valve (
).
7. Remove the fi lling hose (
) from the fi lling
valve (
) as required.
Follow-on Task(s):
None
OFF
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