1. Before use
6
6
9) Checks
to
electrical
devices
Repair
and
maintenance
to
electrical
components
shall
include
initial
safety
checks
and
component
inspection
procedures.
If
a
fault
exists
that
could
compromise
safety,
then
no
electrical
supply
shall
be
connected
to
the
circuit
until
it
is
satisfactorily
dealt
with.
If
the
fault
cannot
be
corrected
immediately
but
it
is
necessary
to
continue
operation,
an
adequate
temporary
solution
shall
be
used.
This
shall
be
reported
to
the
owner
of
the
equipment
so
all
parties
are
advised.
Initial
safety
checks
shall
include:
.That
capacitors
are
discharged:
this
shall
be
done
in
a
safe
manner
to
avoid
possibility
of
sparking;
That
there
no
live
electrical
components
and
wiring
are
exposed
while
charging,
recovering
or
purging
the
system;
That
there
is
continuity
of
earth
bonding.
.
.
7.Repairs
to
sealed
components
During
repairs
to
sealed
components,
all
electrical
supplies
shall
be
disconnected
from
the
equipment
being
worked
upon
prior
to
any
removal
of
sealed
covers,
etc.
If
it
isabsolutely
necessary
to
have
an
electrical
supply
to
equipment
during
servicing,
then
a
permanently
operating
form
of
leak
detection
shall
be
located
at
the
most
critical
point
to
warn
of
a
potentially
hazardous
situation.
Particular
attention
shall
be
paid
to
the
following
to
ensure
that
by
working
on
electrical
components,
the
casing
is
not
altered
in
such
a
way
that
the
level
of
protection
is
affected.
This
shall
include
damage
to
cables,
excessive
number
of
connections,
terminals
not
made
to
original
specification,
damage
to
seals,
incorrect
fitting
of
glands,
etc.
Ensure
that
apparatus
is
mounted
securely.
Ensure
that
seals
or
sealing
materials
have
not
degraded
such
that
they
no
longer
serve
the
purpose
of
preventing
the
ingress
of
flammable
atmospheres.
Replacement
parts
shall
be
in
accordance
with
the
manufacturer’s
specifications.
NOTE:
The
use
of
silicon
sealant
may
inhibit
the
effectiveness
of
some
types
of
leak
detection
equipment.
Intrinsically
safe
components
do
not
have
to
be
isolated
prior
to
working
on
them.
1)
2)
8.Repair
to
intrinsically
safe
components
Do
not
apply
any
permanent
inductive
or
capacitance
loads
to
the
circuit
without
ensuring
that
this
will
not
exceed
the
permissible
voltage
and
current
permitted
for
the
equipment
in
use.
Intrinsically
safe
components
are
the
only
types
that
can
be
worked
on
while
live
in
the
presence
of
a
flammable
atmosphere.The
test
apparatus
shall
be
at
the
correct
rating.
Replace
components
only
with
parts
specified
by
the
manufacturer.
Other
parts
may
result
in
the
ignition
of
refrigerant
in
the
atmosphere
from
a
leak.
Summary of Contents for Thermal Plus 12
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