A
PD MANUAL
IOM-39
22 of 36
Aug 99 R1
Do
not
change
the
type
of
refrigerant
in
the
system.
Warranty
is
void
if
refrigerant
type
is
changed.
Zeotropic
refrigerants
(e.g.
R410A,
R407c,
R404A),
must
be
charged
into
the
system
as
a
liquid.
Care
must
be
taken
to
introduce
the
refrigerant
safely.
COMPRESSOR
OIL
Several
types
of
oil
are
used
by
compressor
manufacturers.
The
different
types
of
oil
cannot
be
mixed
or
interchanged.
Consult
the
compressor
manufacturer
for
the
correct
type,
viscosity
and
quantity
of
oil
used
in
the
compressor.
On
larger
compressors,
it
is
a
good
practice
to
do
an
acid
test
yearly.
If
the
oil
is
acidic,
discolored
or
has
a
bad
smell,
change
the
oil
and
take
corrective
action
to
stop
acid
formation.
Small
Hermetic
compressors
have
no
visual
means
of
determining
oil
level.
In
the
case
of
a
leak,
if
the
amount
of
oil
lost
is
small
and
can
be
reasonably
calculated,
this
amount
should
be
added
to
the
compressor.
If
there
is
a
major
loss
of
oil,
the
service
personnel
must
remove
the
compressor,
drain
the
oil
completely
and
add
the
compressor
manufacturers
measured
oil
charge
for
replacement
compressors
before
placing
the
compressor
into
operation.
Contact
the
compressor
manufacturer
for
the
type
and
quantity
of
oil
required.
Larger
hermetic,
semi
‐
hermetic
and
screw
compressors
are
equipped
with
an
oil
level
sight
glass.
Consult
compressor
manufacturer
for
correct
oil
level.
The
oil
level
sight
glass
is
typically
between
1/4
and
3/4
full.
Excessive
oil
in
the
system
can
damage
the
compressor.
SHUTDOWN
PROCEDURE
Warning:
Electrical
shock
or
death
can
occur
if
instructions
are
not
followed.
This
equipment
contains
moving
parts
that
can
start
unexpectedly.
Injury
or
death
could
occur
if
instructions
are
not
followed.
All
work
should
be
performed
by
a
qualified
technician.
Always
disconnect
power
before
servicing.
DO
NOT
bypass
any
interlock
or
safety
switches
under
any
circumstances.
1.
Temporary
Shutdown
To
shut
the
unit
down
for
a
short
time
(such
as
for
inspection
or
service).
Shut
of
the
service
switch
in
the
main
control
panel
then
turn
off
the
main
disconnect.
2.
Re
‐
Startup
after
Temporary
Shutdown
a)
Turn
on
main
disconnect
for
the
unit.
b)
After
the
crankcase
oil
is
warm
again,
turn
on
service
switch.
