Baxi Slim HPS 1.80 Installer's Instructions page 54

"1.80 - 1.99" models. To adjust the opera-
ting pressures, refer to section 4.2.
When the working pressures have been
adjusted, reseal the regulators.
After have ultimated the conversion of the
boiler, please stick onto the casing panel
the plate showing the relevant feeding gas
which is included into the conversion kit.
NOTE: After assembling all the gas con-
nections, a test for gas tightness must be
carried out using soapy water or special
products. Do not use naked flames. The
conversion to different gas must be car-
ried out exclusively by authorized techni-
cal personnel.
4.5 SHELL DISASSEMBLY
Follow the steps described below to disas-
semble the shell (fig. 12):
– Remove the shell door (1) which is atta-
ched with pressure fit pins.
– To remove the cover (3) loosen the two
screws that attach it to the flue gas
chamber and lift.
– Remove the top front panel (2) placing it
against the flue gas chamber.
– Disassemble the left side (4) unscrewing
the nuts that attach it to the tie rods.
– Do the same operation to disassemble
the right side (5).
– Remove the inner wall (6) by pulling it
forward.
– Unscrew the nuts that secure the rear
wall (7) to remove it from the tie rods.
4.6 CLEANING AND
MAINTENANCE
At the end of each heating season, it is
essential to have the boiler thoroughly
checked and cleaned out.
Proceed as follows:
– Turn the main switch off to stop electric
power reaching the boiler and close the
gas feed cock.
– Remove the shell door and cover.
– Remove the top panel of the flue gas
chamber attached to it with self-threa-
ding screws.
– Remove the gas unit.
– Insert a special brush from the top into
the rows of pins in the cast iron exchan-
ger and move the brush up and down to
remove the scales.
– Remove the burner from the nozzle hea-
der and aim a jet of air toward the inside
of the burners to remove any dust. Make
sure that there are no scales on the top
drilled part of the burners (fig. 13).
– Remove any scales from the bottom of
the boiler and replace the items that
were removed, checking the position of
the gaskets.
– Check the chimney to make sure that
the flue is clean.
– Check operation of the equipment and
the main burner.
54
– After assembly of all the gas connec-
tions, these must be tested for sound-
ness, using soapy water or appropriate
products. DO NOT USE NAKED FLAMES.
Preventive maintenance and checking of
efficient operation of equipment and
safety devices must be carried out exclu-
sively by authorized technical personnel.
4.7 FAULT FINDING
The main burner does not ignite.
– This means that the flue smoke stat has
tripped off (point 3.3).
– Make sure power arrives to the gas
valve.
– Replace the electric operator of the
valve.
KEY
1 Boiler body
2 Burner
3 Main nozzle
4 Aluminium washer
5 Burner manifold
Fig. 12
Fig. 13