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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.
9.5
Check the pressure of the
heating expansion vessel
Drain the heating circuit as described in sec-
tion "Emptying the c.h. system" to page 70
and check that the expansion vessel pres-
sure is not less than 1 bar.
If the pressure is less, see to correct pres-
surisation.
9.6
Checking the fl ue expulsion
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.
9.7
Combustion analysis check
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.
- 72 -
MAINTENANCE
Fig. 9.9
9.8
The condensate drain pipe 29 ( 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
9.9
Visually inspect all water joints, seals and
connections for any evidence of leakage
and retighten, grease or replace them as
necessary.
Flue analysis
Checking the condensate
drain pipe
Visual inspection of appliance
points
29
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