Table of Contents
Advertisement
9.4
Combustion analysis check
If it is necessary to carry out a combus-
tion analysis remove the plugs indicated
in Fig. 9.1.
Reference figures are given in the sections
"Technical Data" on pag. 18 or pag. 21 (Flue
gas figures).
9.5
Cleaning the primary heat
exchanger
• Take off the front of the case.
• Take off the removable front of the sealed
chamber and the front panel of the com-
bustion chamber.
If you notice dirt on the fins of the primary
heat exchanger (33on page 17):
• Cover the sloping surfaces of the burner
(30on page 17) entirely in a protective lay-
er (sheets of newspaper or similar).
• Brush out the primary heat exchanger
(33on page 17) with a bristle paintbrush.
9.6
Checking the pressurisation
in the expansion vessel
Empty the central heating systemas de-
scribed in section "Emptying the c.h. sys-
tem" to page 50 and check that the expan-
sion vessel pressure is not less than 1 bar.
See also section "Expansion vessel" to
page 24.
If the pressure is lower, take steps to correct
the pressure level
9.7
Cleaning the burner
The sloping and multi-gas type burner
(30on page 17) does not need special main-
tenance, but it is sufficient to dust it with a
bristle paintbrush.
To reach the burner:
MAINTENANCE
• Take off the front of the case.
• Take off the removable front of the sealed
chamber and the front panel of the com-
bustion chamber.
• Brush out the burner with a bristle paint-
brush.
9.8
Have the integrity of the flue outlet pipe
(40on page 17) air intake pipe (41on page
17), checked periodically, the air pressure
sensor* (16on page 16) and the efficiency
of the flue safety circuit checked at least
once a year.
* For details see the section Fan and air
pressure sensor in the service manual.
For all the above maintenance operations
it is advisable to call an approved Service
Engineer.
9.9
Check the soundness and integrity of the
condensate drain pipe.
Verify the cleaness and correct filling of the
condensate traps.
9.10 Visual inspection of appliance
Visually inspect all water joints, seals and
connections for any evidence of leakage
and retighten, grease or replace them as
necessary.
9.11 Gas pressures and tightness
Check appliance for gas tightness. Recheck
operational pressures and adjust as neces-
sary as described in section "Checking the
gas pressure at the burner" to page 45.
Checking the flue
Drain pipe inspection
- 51 -
Advertisement
Table of Contents
