74
3.12 — Oil Pressure Safety Switch
Carlyle uses as standard the 120-second time delay oil safety
switch, as this time period is preferred for HFC/POE sys-
tems. This is a change from the 45 to 60-second time delay
used previously with CFC and HCFC systems. It is not nec-
essary to change out the older, shorter time delay switch
unless the unit is converted to an HFC/POE system.
The oil safety switch protects the compressor when lubrica-
tion is lost for more than 120 seconds. The switch closes the
control circuit at start-up allowing the compressor to run for
120 seconds. Operating oil pressure must reach the mini-
mum required start pressure above suction pressure within
120 seconds for the switch to remain closed, which allows
the compressor to run. If the operating oil pressure falls to
below the minimum stop pressure above suction for longer
than 120 seconds, the switch will open the control circuit,
shutting down the compressor.
Carlyle has approved the following oil safety switches for
all applications with 06D, E, CC compressors:
CARLYLE
PART NO.
TIME
DELAY
(SEC)
CONN.
PRESSURE
DIFF. (PSI)
VOLTS RESET
REMOTE
ALARM
CIRCUIT
START STOP
060B210966 120
1/4-in.
Male
Flares
8-11 4-8
115/
230
Manual Yes
060B2164 120
36-in.
Long
Capacity
Tube 1/4-
in. SAE
Nuts
8-11 4-8
115/
230
Manual Yes
06DA509570 120 N/A 12-14 8-10
115/
230
Manual Yes
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