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3.13 — 06CC, E Discharge Gas Cylinder Head
Temperature Sensor and 06E Pressure Relief Valve
All OEM Carlyle 06EA, EM, ER compressors since 1982 are
equipped with a discharge gas temperature sensor. The sensor
is installed in the discharge or center head on all six-cylinder
(three-head) models. The four-cylinder 06E compressors (two
heads) have the sensor in the left side head as viewed from
the oil pump end. All 06CC compressors have the sensor
located in the discharge (high stage) head.
Pressure Relief Valve
All 06E compressors and all 06CC 50-99 cfm compressors
are equipped with a pressure relief valve that relieves from
discharge pressure to crankcase pressure. It is located under
the center cylinder head on all 6-cylinder 06E and 06CC com-
pressors, and under the discharge service valve on all 4-cylin-
der 06E compressors. The relief valve is sealed with a metal
gasket:
Part Number Description
EB51FN272 - 400 psi Relief Valve (differential pressure)
6G65-1251 - Relief Valve, Gasket
An 11/16 in. drag link socket can be useful for removing or
installing the relief valve.
When the discharge gas temperature in the cylinder head
exceeds the sensor trip setting (see below), the sensor will
open the control circuit and shut off the compressor. The
head sensor must be wired into the control circuit by the
OEM and is pilot duty only at 240V = 0.52A, at 115V =
1.04A. The sensors are threaded into the head without a
well. Therefore, when changing a sensor, the compressor
must first be isolated and evacuated.
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