Routine Cleaning And Inspection - Saunier Duval ISOFAST F 28 E Installation And Operating Instructions Manual

ROUTINE CLEANING AND INSPECTION

To ensure the continued efficient and safe opera-
tion of the boiler it is recommended that it is
checked and serviced at regular intervals. The fre-
quency of servicing will depend upon the particu-
lar installation conditions and usage, but in gen-
eral once a year should be enough.
It is the law that any servicing is carried out by a
competent person.
Service Check and Preparation.
• Operate boiler and check for any faults that need
to be put right.
• Isolate boiler from the gas and electrical supplies.
• On completion check all gas carrying parts for
soundness with leak detection fluid.
• Remove boiler casing as follows:
Upper front panel
• Remove the two front panel retaining brackets
from the top of the boiler.
• Remove panel by lifting up and forward.
Sealed chamber cover
• Unclip two toggle clips holding the sealed cham-
ber cover, see diagram. 1.
• Lift cover up and off boiler.
Front control panel
• Lift control panel up and lower forwards to gain
access to lower part of boiler.
Side panels
• Unscrew and remove the four screws securing
lower grille onto boiler. Unhook grille from rear of
boiler and remove.
• Remove three screws from front of each side panel.
• Unclip the toggle clips securing top of each panel.
Lift each panel up and then forward to remove.
Combustion chamber cover
• Unclip two toggle clips and unscrew two screws
securing combustion chamber cover to combus-
tion chamber, see diagram 2.
• Remove combustion chamber cover from boiler.
• Undo, but do not remove, two burner support screws
at rear of burner chamber.
Burner
• Undo main gas supply nut from burner.
• Pull off the ignition and flame sense leads from the
gas valve remove burner from boiler by lifting up and
pulling forwards from keyhole slots.
Note: The washer between main burner and main
burner gas supply must be kept for use on
reassembly.
• Remove ignition and flame sense electrodes from
burner.
• Unscrew and remove injector bar retaining
screws and separate injector bar from burner.
• Examine and clean injectors as necessary.
Note: DO NOT use a wire or sharp instrument on
the holes.
Clean burner by washing in soapy water. Dry thor-
oughly before re-fitting.
2 0
Diagram 1
Diagram 2
Heat exchanger
• Disconnect power supply leads and earth lead
from fan.
• Unscrew and remove, two fan retaining screws
at front edge of fan mounting plate.
• Remove fan with mounting plate attached by
pulling forwards out of boiler.
• Remove air pressure switch sensing tube from
sensing probe on flue hood.
• Unscrew and remove screws securing flue hood
to rear panel.
• Withdraw flue hood from boiler.
• Examine heat exchanger for any blockages or
build up of deposits.
• Clean heat exchanger with soft brush or vacuum
cleaner. Do not use any tool likely to damage
painted finish of heat exchanger.
Reassembly of parts removed for servicing
All parts are replaced in reverse order to removal.