86
Chapter 5
I.
Compressor Tube
Connections
Tecumseh Products Company supplies compressors
to hundreds of manufacturers requiring different
tubing sizes and arrangements. Because of this the
same compressor model may be found in the field in
many suction and discharge tube variations, each
depending upon the specific application in which it
is installed.
Suction connections can usually be identified as the
largest diameter stub tube in the housing. If 2 stubs
have the same outer diameter (OD), then the one
with the heavier wall will be the suction connection.
If both of the largest stub tubes are the same OD
and wall thickness, then either can be used as the
suction connection. Whenever possible, suction
connections should be kept away from the hermetic
terminal area so that condensation will not drip on
hermetic terminals, causing corrosion.
The stub tube, not chosen for the suction connec-
tion, may be used for processing the system.
Identification of compressor connections can usually
be accomplished without difficulty; however, occa-
sionally some question arises concerning oil cooler
tubes and process tubes.
Oil cooler tubes are found only in low temperature
refrigeration models. These tubes connect to a coil
or hairpin bend within the compressor oil sump.
This coil or hairpin bend is not open inside the
compressor and its only function is to cool the com-
pressor sump oil. The oil cooler tubes are most gen-
erally connected to a separated tubing circuit in the
air cooled condenser.
Process tubes are installed in compressor housings
during manufacture as an aid in factory dehydration
and charging.
Standard discharge tubing arrangements for Tecum-
seh hermetic compressors are outlined below. Dis-
charge tubes are generally in the same position
within any model family. Suction and process tube
positions may vary substantially.
Figure 5-1.
Standard discharge tubing arrangements.
Discharge
Tube
Discharge
Tube
Discharge
Tube
Discharge
Tube
On some AE refrigeration
models the terminal cover
faces the other way.
Optional
Oil Cooler Tubes
AE
Refrigeration
AW-E
AW-F
AE
Air Conditioning