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MAINTENANCE
MAINTENANCE
Attention, to reassemble repeat
the operations carried out in re-
verse order. Be careful not to
damage the OR gasket of the
gas pipe when inserting the pipe
in Air box.
After any service operation on
the components of the gas cir-
cuit check all the connections
for gas leaks.
Check the pressure of the
9.6
heating expansion vessel
Drain the heating circuit as described in
sec-
tion "Emptying the c.h. system" to page 73
and check that the expansion vessel pres-
sure is not less than 1 bar.
If the pressure is less, see to correct pres-
surisation.
Cleaning the domestic hot
9.7
water exchanger
Descaling the domestic hot water exchang-
er will be valued by an approved Sevice En-
gineer, who will carry out any cleaning using
specifi c products.
Checking the fl ue expulsion
9.8
pipe
Have the integrity of the fl ue outlet pipe air
intake pipe, checked periodically, at least
once a year. For all the above maintenance
operations it is advisable to call an approved
Service Engineer.
Combustion analysis check
9.9
It is recommended that a combustion analy-
sis check is made. Remove the plug as in-
dicated in Fig. 9.9 and carry out combustion
analysis check and adjustment if necessary
as described in the section Gas valve - Ad-
justment of the Service manual.
Fig. 9.9
Flue analysis
points
Checking the condensate
9.10
drain pipe
The condensate drain pipe
34
( Fig. 9.10
)
does not require any particular maintenance
but just check:
That no solid deposits have formed, if so
•
remove them.
That the condensate drain piping is not
•
clogged.
Unscrew the plug to clean inside the pipe.
Fig. 9.10
34
