(c) Fully
remove
one
screw
from
the
taper
lock,
and
having
oiled
it,
insert
into
the
threaded
jacking point.
(d) Tighten
screw
until the taperlock is free.
(e) Remove taperlock
and
pulley.
(f)
Fit taperlock in
new
pulley,
and
provisionally position
on
the shaft.
(g) Remove the
screw
from the jacking point,
and
tighten
both
screws in their
clamping
points
until the
pulley
can
just be
moved
on
the shaft
by
hand.
(h) Align
pulleys
using
a
straight
edge,
and
by
gradual
alternative tightening of the screws
clamp
in position.
(i)
Refit belts
and
check for
the
correct
amount
of
tension.
Fan Belts
Check belts for signs
of
wear
. Frayed
or
split belts
must
be replaced
using
belts
with
a
common
batch
code. Belt
tension
must
be
checked
,
and
if
on
multi-belt
units
it is
found
that
one
belt
contains
more
slack
than
its
accompanying
belts,
then
all the belts
on
the
unit
must
be replaced,
again
using
a
common
batch code. Replacement
and
tensioning is carried
out
as follows.
Note
The
maximum
displacement
at
the
mid
point
of the
top
edge
of the belt
must
not
be
greater
than
16mm
per
metre of
span,
when
a force of
3kg
is
applied
in a
plane
perpendicular
to the belt.
(a) Loosen fan
motor
securing
bolts
on
chassis.
(b) Loosen fan
motor
slide
adjustment
bolt.
(c) Slide fan
motor
tmvards
fan to slacken belts.
(d) Replace belts,
pull
fan
motor
away
from fan until belts are tight.
(e) Tighten
adjustment
bolt
to hold motor.
(f)
Tighten fan
securing
bolts
ensuring
that
the fan is
square
and
the pulleys aligned.
(g) Check belt tension,
making
final
adjustments
as necessary.
(h) Tighten
and
clamp
fasteners to hold fan
motor
in position.
Heat Exchanger
The
heat
exchanger
requires
a
visual
inspection
at
least
once
per
year,
this
should
be
accompanied
by
cleaning.
It
is
recommended
that a flue
brush
and
vacuum
cleaning
are
used
to
facilitate this. Access to the
heat
exchanger
is
gained
through
the removal
of
the
rear
upper
panel
and
heat
shield. Servicing
and
cleaning
should
be
performed
as follows.
(a) Remove brass
nuts
and
cover from heat exchanger
end
assembly to expose heat exchanger tubes.
(b) Remove
any
accumulated
deposits
from the tubes
by
pushing
through
the full length "vith a
flue
brush.
(c) The flue
brush
should
be
withdrawn
so as to
pull
any
deposits
back into the
bottom
of the flue
box
where
they can
then
be
removed
by
using
a
vacuum
cleaner.
(d) Particular
attention
should
be
paid
to
the
upper
internal surfaces of the tubes,
where
through
convection
heavier
deposition
is likely to occur.
(e)
Any
deposits
which
may
have
accumulated
within
the
combustion
chamber
can
be
removed
with
a
vacuum
cleaner once the
burner
is removed.
26
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