Technical data

Installation and maintenance instructions ecoTEC exclusive 0020017768_0540
8.6 Checking the expansion vessel
1
Fig. 8.9 Checking the expansion vessel
h
Note!
This check need not be performed every
year - a check every three years is sufficient.
• The maintenance cocks of the central heating system
must be closed.
• Release the pressure from the appliance.
• Remove the valve cover from the filling connection
of the expansion vessel.
• Check that the internal pressure in the expansion
vessel is between 0.75 and 0.9 bar. If the pressure
is less than this, the vessel must be pumped up again
using an air pump.
• Refit the valve cover.
• Re-pressurise the boiler and the heating system.
8.7 Checking the connection pressure
(gas inlet working pressure)
To check the connection pressure proceed as described
in Section 6.2.3.
8.8 Checking CO
2
content and adjusting if
necessary
To check the air figure proceed as described in
Section 8.1.3.
8.9 Test operation
Always perform the following checks after completing
any inspection/maintenance task:
• Commission the appliance in accordance with the
instructions in the relevant operating manual.
Fig. 8.10 Function check
• Check the appliance for gas and water leaks.
• Check the flue system for leaks and that it is fixed
properly.
• Check over-ignition and that the flame on the burner
is burning evenly.
• Check the function of the heating (see Section 6.3.1)
and the hot water preparation (see Section 6.3.2)
• Document the inspection/maintenance tasks per-
formed in the form provided in the inspection or
maintenance contract.
8 Inspection and maintenance