Cleaning And Maintenance; Fault Finding - Sime RX 26 BF Manual Del Usuario

preset values; correct the regulations if
required.
– Adjust, and make sure that you have
restored the power to the modulator.
– Put the pipe back on the valve VENT
pressure test point.
– Remove the manometer, remembering
to tighten the screw for closing the pres-
sure test point (4 fig. 11).
– Put the plastic cap (3) back on the modu-
lator and seal with a drop of coloured
sealant if necessary.
4.3 CLEANING AND
MAINTENANCE
Scheduled maintenance of the generator
is carried out each year by qualified person-
nel. Follow the procedure listed below:
– Clean the gaps of the boiler casing by
moving the relevant swab up and down
inside the gaps.
– Clean the principal burner and wipe the
scale off from the electrodes.
– Check the combustion product dis-
charge system.
– Check appliance start-up, shutdown and
operation.
– After assembly, all the gas connections
must be seal tested by using soapy
water or any other suitable product,
avoiding the use of open flames.
4.4

FAULT FINDING

The principal burner does not start.
– Check if power is supplied to the gas valve
enabling device; check its operation and
replace it if required.
– Check flue gas pressure switch operation.
– The fan works but with less revolutions
and therefore it does not enable the flue
gas pressure switch, replace it.
The principal burner does not burn prop-
erly: flame too high, yellow flame.
– Make sure that the gas pressure of the
burner is regular.
– Make sure that the burners are clean.
The boiler works at the maximum C.H.
output.
– Check the calibration value of the heating
pressure.
– Make sure that the coil assembled on
the valve is not interrupted, replace it if
required.
The radiators heat up even during the
summer.
– Check that the check valve seat is free
from impurities.
– Replace the check valve if faulty.
– Assemble a check valve on the system
return pipes.
The radiators do not heat up during the
winter.
– The room stat has been regulated too
low or is faulty and needs to be replaced.
– The electrical connections of the room
stat have not been carried out properly.
– The circulation pump of the system is
stopped, release it.
The safety valve of the boiler intervenes
too often.
– Check that the cold system is not filled
up too high, refer to the recommended
values.
– Check the system valve if it is not-calibrat-
ed replace it.
– Check the expansion vessel pre-inflating
pressure.
– Replace the expansion vessel if needed.
The boiler works but the temperature
does not rise.
– Check that gas consumption is not less
than the one foreseen.
– Make sure that the boiler is clean.
– Make sure that the capacity of the boiler
is suitable for the system.
The fan works but the burner does not
start.
– Check and if needed remove impurities
and condensate from the connection
pipes of the flue gas pressure switch.
– Needs to be calibrated again or even it
will be even better to replace the flue
gas pressure switch with a new one that
has been calibrated in the factory.
The fan does not start.
– Check if the starting motor terminals
are live.
– The electrical winding of the starting
motor is burnt and needs to be replaced.
IT
ES
PT
GB
45