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MAINTENANCE
5 - EXPANSION VESSEL PRE-INFLATION PRESSURE CHECK
- Drop the pressure in the heating installation by
opening the drain cock or the safety valve (pres
-
sure gauge reading under 0.5 bar).
- Check the pressure in the expansion vessel and
if necessary bring it back up to pressure, or repla
-
ce it if the membrane is punctured (water present
in the inflating valve).
- To optimise the efficiency of the vessel:
• adjust its pre-inflation pressure in line with the
installation. It must correspond to the static
height of the installation (H) expressed in bars
(height between the highest point of the instal
-
lation and the expansion vessel, with 10 me-
tres = 1 bar),
• adjust the filling pressure of the installation to a
value of over 0.2 bar above the pre-inflation
pressure of the vessel (after totally bleeding
the air from the installation).
6 - COMBUSTION PRODUCT FLUES
- Have the combustion product outlet checked and
cleaned at least once a year (by qualified person
-
nel). (non blocked conduit).
The outlet can be cleaned with running water.
The water flow must not be too great so that it can
be evacuated through the condensate outlet (
∅
40).
- Be sure to maintain proper watertightness and
the unobstructed flow of the combustion pro
-
ducts. Replace any damaged tightness seals if
necessary.
Leaks can be detected through the appearance
of condensate runoff traces on the outside of the
tubes.
Check:
• the inside of the outlet with an electric torch,
• the entrance of the outlet through the combus-
tion test point (fig. 63, item no. 34),
• the end of the outlet through the horizontal or
vertical terminal.
• Clean the air suction inlet sheath at the burner.
7 - OIL FILTER
Clean the oil filter yearly or in the event of premature
fouling (e.g. when filling the tank).
- Turn off the oil inlet cock,
• o unscrew the cap.
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