l
5.2 Servicing Procedure - Major
Component
Parts
Flue
A visual
inspection
should
be
carried
out
to
ensure
that
the flue
remains
adequately
supported,
both
internally
as well as externally,
and
that
the
various
joints
are
effectively sealed. Inspection
covers,
where
fitted,
should
be
removed
and
the flue checked to
see
whether
cleaning
is required.
ff
inspection
covers
are
not
fitted
the
gas
exit
duct
and
flue
spigot
will
provide
not
only
an
indication
of
the cleanliness
of
the flue,
but
will also
enable
access for cleaning. The
presence
of
the
flue
terminal
should
be checked.
If a
condensate
trap
and
drain
facility
is
fitted this
should
be checked to
ensure
that
it
continues
to function correctly,
and
the
drainage
of
condensates
is not
impaired.
Main Fan Motor
Remove
access panel.
Dust
and
other
foreign
matter
should
be
cleaned
by
blowing
over
with
compressed
air
and
through
the
use
of
a soft bristle
brush
and
cloth. Solvent
wipes
may
be
used
to
remove
heavy
soiling
from the
motor
casing.
Traces
of
surplus
lubricants
spreading
from
the
bearings
should
also be cleaned away.
Where
motors
are
fitted
with
grease
nipples
bearings
should
be
lubricatd
with
the correct
grade
of lubricant.
Motors
which
do
not
have
grease
nipples
feature
sealed
bearings
,,,,hich
are
lubricated
during
manufacture
for their life.
The electrical connections
should
be checked as follows. The cover to the
terminal
box
should
be
removed
by
undoing
the
screws
which
secure
it.
Check
connections
for
signs
of
corrosion,
tightness,
and
ensure
that
there
are
no
stray
strands
which
could
form a
short
circuit.
Clean,
tighten,
and
replace as necessary. Replace cover
and
secure.
Main Fan
Remove
dust
and
other
foreign
matter
by
blowing
off
with
compressed
air
or
through
the
use
of
a soft bristle
brush.
Check
that
the
bearings
do
not
show
signs of excessive wear.
It
should
be
noted
that
these
bearings
do
not
require
lubricating
. If
the
bearings
require
replacing
the
following
pro
cedure
should
be followed.
Re
move
belt(s).
s
en
set screw
on
eccentric collar
and
tap
collar in the
opposite
direction to fan rotation.
- Remove collar
and
bearing.
Ch
k
sha
ft for
alignment
and
straightness
.
Ie
d e the
bearing
in its
seat
and
place
on
the
shaft
with
the
cam
facing
outwards
.
(tl Fit
the
eccentric collar
and
engage
the cams.
(g)
Ti
hten
initially
by
rotating,
and
then
by
tapping
in the direction
of
the fan rotation.
(h)
Rep
lc\ct'
faste
ners
and
secure.
(i) Turn b hand to
ensure
free fan rotation.
Pulleys
Check
pulleys
for
alignment
using
a
straight
edge,
if necessary reposition
either
or
both
of
the
pulleys
and
the fan motor.
Check
for excessive
wear
within
the root
and
sides
of
the grooves,
and
check for
any
other
signs
of
wear
or
damage,
if necessary replace the
pulley
as follows.
(a) Release tension on belts
and
remove.
(b) Release the
taper
locks
by
slackening
the
securing
screws
by
several
complete
turns.
25
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