4.3
Commissioning
-
air
delivery
system
Caution
On
ducted
applications
it is
necessary
that
the
system
is
balanced
in
order
to
optimise
the
efficiency of the heater
and
the air distribution
and
delivery system. Failure to balance the
system
can
result
in fan
motor
overloading
and
premature
component
failure,
it
can
also
result
in
an
inefficient
heating/ventilation
system.
(a)
Check
that
the
amount
of
fan
produced
air
volume
is
in
accordance
with
the
heater
specification, if the
volume
is too great
the
fan can be overloaded.
Ensure
that
the
running
current
is as
per
that
stated
on
the
heater
data
plate. Alternatively, the static pressure
should
be
measured
at the start
of
the
ductwork
to confirm
that
it
is within the permissible tolerance.
(b)
If
the
current
drawn
is greater
than
the stated
running
current, in most probability this will be
caused
by
insufficient static
pressure
within
the
ductwork,
in
which
case system resistance
should
be increased
through
the introduction of a
damper
placed as close to the start of the
ductwork
as possible, thereby resulting in a reduction in
drawn
current. The
damper
should
be
adjusted until the current is in accordance
with
that
stated
on
the data plate.
(c)
If
the
current
drawn
is too
low
the
duct
outlet
grilles will require
opening
to
reduce
static
pressure
and
increase air
volume
,
if
this is
not
the case overheat
cut
outs
can
be
caused.
4.4
Commissioning
-
hand
over
(a)
Upon
full
and
satisfactory
completion
of
commissioning,
a
record
of
commissioning
information (contact, date, etc)
should
be left
with
the heater, a copy of which
must
also be
forwarded
to Benson Environmental Ltd Service Department.
(b) The commissioning engineer
must
ensure
that the
user
is familiar with the safe
and
efficient
use
of
the
heater, detailing the function of all controls,
and
main
components.
(c)
The
user
should
be
made
aware
of
the following in particular
(i)
Lighting,
shutdown,
and
operational information.
(ii) Safety features,
data
plate,
and
labelling.
(iii) The
requirement
for regular inspection - especially if the heater is within a more
demanding
environment
-
and
the need for regular servicing, carried
out
by
competent
and
qualified persons.
(d) Section C 'User Instructions'
should
be left
with
the
customer
upon
satisfactory completion
of
the commissioning
and
hand-over.
Caution
After approximately
100
hours
of running, the tension of the fan belts
must
be checked to ensure
that
they are correct
and
that they have
not
stretched. See section 5.2 for further instructions.
5.0
Servicing
Warning
Servicing
must
be carried
out
on
a regular basis, the
maximum
interval
between
services being
1 year. It is a
requirement
that
only
suitably
qualified
and
competent
persons
are
allowed
to
undertake
servicing.
Before
any
maintenance
or
servicing
work
is carried out,
the
heater
must
be
shut
down
and
allowed
to cool,
and
have
the
oil
and
electric
supplies
to
it
turned
off
at
the
supply
valve
and
isolator
respectively.
27
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