Du Pont SORVALL RC-5 Service Manual page 181

Sorvall®
Centrifuges
Maintenance
&
Repaire.
Reinstallation of
Components1.
Reinstall
counter spring adjuster and adjust so
that
door
will
not
strike the
latchwhen
allowed to fall from the fully
open
position.2.
Refit the
solenoid.
Shim
as necessary
with
special rectangular 0.8 mm
(1/32
in)shims.
The interlock
pin
must travel free.
Refit and
adjust
the
microswitch.3.
Reinstall
the
deck
and
console and check
that neither
hinge nor
latch
interfereswith
the
lip of
the deck
cover in
any
position.6-16.
Refrigeration
Maintenancea.
Compressor
Resistance
ValuesTecumseh
compressor
motor resistance values
are
measured
across compressor
termi¬nal
leads. Approximate resistance
of
motor windings at
ambient
temperature
of
25°C(77°F)
is given
in Table 6-1.
Resistance
of both
windings is measured across
compressorterminals
R
and
S
to common
C.b.
Compressor
BurnoutIf
a compressor
failure
has been determined,
it will
be
necessary
to
replace
the
completecondensing
assembly.
In this
case, a determination must be made of the
type
of
burn¬out
that has
occurred so
that the
evaporator liner can be cleaned
accordingly.Two
types
of burnouts can occur: a standing burnout
or a running burnout.
These
canbe
determined
by
smelling and visually examining the
refrigerant.1.
Open a
service valve while holding a white cloth
or
white
tissue over
the
opening
tocatch
a
few
drops
of
oil.2.
Sniff the
refrigerant; an
acrid odor indicates
a
burnout.3.
Examine
the
refrigerant.
If
the oil is
clean, a standing burnout is indicated and
thecontamination
of the
evaporator
liner will
not be
extensive.Table
6-1.
Tecumseh Compressor Motor Resistance
ValuesTecumseh
ModelAH2511JAH2466AJE150JB100ResistanceSTART1-53-63-66-9Range
(Ohms)BOTH2-5}3-6}4-7)7-10}Terminal
StripLocationcS^R000C
S
R6-43