(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
towards
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
that
the pulleys are 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
with
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withdrawn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.
30
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