Cleaning And Maintenance; Fault Finding - Sime RMG Mk.II Serie Instrucciones Para El Instalador

the LPG adaptor code 6248301 onto
the gas valve (5 fig. 10).
To adjust the operating 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
connections, a test for gas tightness
must be carried out using soapy
water or special products.
Do not use naked flames. The conver-
sion to different gas must be carried
out exclusively by authorized techni-
cal personnel.
4.4 SHELL DISASSEMBLY
Follow the steps described below to
disassemble the shell (fig. 12):
– Remove the shell door (1) which is
attached 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) pla-
cing 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 disassem-
ble 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.
4.5 CLEANING AND
MAINTENANCE
At the end of each heating season, it is
essential to have the boiler thoroughly
54
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-
threading screws.
– Remove the gas unit.
– Insert a special brush from the top
into the rows of pins in the cast iron
exchanger and move the brush up
and down to remove the scales.
– Remove the burner from the nozzle
header 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
KEY
1 Boiler body
2 Burner
3 Main nozzle
4 Aluminium washer
5 Burner manifold
position of the gaskets.
– Check the chimney to make sure
that the flue is clean.
– Check operation of the equipment
and the main burner.
– After assembly of all the gas con-
nections, these must be tested for
soundness, using soapy water or
appropriate products. DO NOT USE
NAKED FLAMES.
Preventive
checking of efficient operation of
equipment and safety devices must
be carried out exclusively by authori-
zed technical personnel.
4.6

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.
– Replace the valve.
The boiler reaches the set tempe-
rature, but the radiators do not
heat up.
– Make sure there are no air bubbles
in the system, if so purge from
appropriate air vents.
– The room stat is too low or must be
replaced if faulty.
Fig. 13
– The connections of the room stat
Fig. 12
maintenance and