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3 - BURNER MAINTENANCE
Turn-off and disconnect the boiler
!
4 - CHECKING ACCESSORIES
- Check annually that the safety and regulation de-
vices
(30 Psi safety valve, air bleed, safety
control box, etc.) are operating properly.
- Check that the condensate drain siphon is clean
(remove it, clean it, replace it and then fill it with
water).
- Also check that neither the installation nor the
boiler present any water or fuel leaks (leaks may
produce a risk for safety and shorten the lifes-
pan).
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 7-8 PSI (0.5 bar)).
- Check the pressure in the expansion vessel and
if necessary bring it back up to pressure, or re-
place it if the membrane is punctured (water pre-
sent in the inflating valve).
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 = 1,6 inch).
- Be sure to maintain proper watertightness and
the unobstructed flow of the combustion pro-
ducts. Replace any damaged tightness seals if
necessary.
Annual burner maintenance is sufficient if it is pro-
perly adjusted.
- cleaning: See boiler instructions,
- check that the spray nozzles are in good condi-
tion (s. section 5.3 - page 34 - chapter VI - COM-
MISSIONING, ).
- check that there is no fuel leak.
- When it is frequently necessary to add water to
maintain pressure in the installation, even though
no leaks have been discovered, perform an ex-
pansion vessel check (s. section 5 - page 37 -
chapter VII - MAINTENANCE).
- Check the condition of the various seals (burner
flange, burner door, flue outlet, etc.).
- To avoid any sludging risk, it is recommended to
switch-on the circulator heater and to operate the
mixing control valve at least twice during the sum-
mer (see the operating instructions).
- 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
metres (32.8 ft) = 1 bar (14.5 Psi)),
• adjust the filling pressure of the installation to a
value of over 3 PSI (0.2 bar) above the pre-in-
flation pressure of the vessel (after totally blee-
ding the air from the installation).
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. 41, 15),
• the end of the outlet through the horizontal or
vertical terminal.
• Clean the air suction inlet sheath at the burner.
- 37 -
MAINTENANCE
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