W}len cranlcase
oil temp€rature falls
wirhin rhe 120
to
135 F range, tbe
shaft seal housing temperature
should be
approxinarely
140 ro 150 F.
Shafr seal housing
tempera-
tures above
170 F may cause shaft
seal to age rapidly, and
harden and crack. Therefore:
lfshafi
seal housins temDerarur
e\ceeds 170 F. STOP
THE COMPRESSoR.
DO NO r resran uni;t
rhe
(au5(
of overheating has been
identified, and the condition
Fig. 19
-
Oil Filter
Accessory Package
{5H40
thloush
5H861
CHECK OIL AND SHAFT SEAL TEMPERATURE
The
normal operating
temperature of the oil in the crankcase
ranges fiom 100 F to 135 F when
fully loaded. Do not
per-
nit
maximum
oil temperature to
exceed
150 F.
Conditions
und€r whi€h
such excessive temperatures could occur in-
clude situations wherc
the comprcssor operates in a fully
unloaded condition for an ext€nded
Deriod. because thecom-
pressor
would
not be able to remove all of the heat
gener-
ated by compression
and friction. In such situations, use an
oil cooler to maintain
safe operating temperatures. Refer to
5F.H Aoplication Data for more information.
OIL
COOLER USAGE
-
The accessory
oil cooler main,
tains safe
operating oil temp€ratures whenl
l. Applying
long stroke €ompressors
(5H46,
66. 86 and
126). For
added reliability, an oil cooler
is required on
all
long stroke models
regardless of operating range
or
lype
of
reftigerant.
Additional heat
of friction from ex,
tended
piston
lravel
on long stroke models increases
oil
2. The suct;on
gas
becomes highly
superheated
(Table
7).
3. a. Th€
compression ratio exceeds
5rl on R-22 systems.
b. Application data
indicates the need
for an oil cooler
for R-12 and R-502 systems.
The €ompressron
rato
can
be determined from the following
formula:
Absolule
Discharye
Compression
Ratio
=
Absolute
Suction Pressure
rl.!{ |
(Auto.-Rev€rcing)
B
(Manual
Revercang)
*tle
H-
t
Fig. 20
-
Oil Pump and Filter Assembly
(5H120,
126)
l8
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