Specifications

75
3.14 — Oil Safety Switch
Carlyle uses as standard the 120-second time delay oil
safety switch, as this time period is preferred for HFC/
POE systems. This is a change from the 45 to 60-second
time delay used previously with CFC and HCFC
systems. It is not necessary 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
lubrication 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 11 psi 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 4 psi 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:
• Danfoss - Type MP54. See details below
• Penn/Johnson electronic switch - P445
ELYLRAC
TRAP
.ON
SSOFNAD
TRAP
.ON
EMIT
YALED
)CES(
.NNOC
ERUSSERP
)ISP(.FFID
STLOVTESER
ETOMER
MRALA
TIUCRIC
nI-tuCtuotuC
0342-925P9012B060021
elaM4/1
seralF
11-88-4032/511launaMseY
0142-925P4612B060021
gnoL"63
yticapaC
ebuT
EAS"4/1
stuN
11-88-4032/511launaMseY