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4.10 — 06D and 06CC (16-37 Cfm) Electronic Overcurrent
Protection
The latest production Carlyle 06D and 06CC (16-37 Cfm)
compressors manufactured after August 2015, S/N starting
with '3115', include a new electronic overcurrent protection
module, that interprets a signal from a PTC triplet (embed-
ded in the stator windings) and a current transformer
(located in terminal box). This module will shut down the
compressor when it is operated at conditions that are not
suitable.
The most significant difference between the electromechani-
cal overcurrent protection scheme and the new electronic
overcurrent protection scheme is that the new electronic
module will require OEM customers to provide control volt-
age to the terminal box of the compressor for the compres-
sor protection module. The electronic overcurrent protection
module and current transformer are factory installed, with
a
preprogrammed MCC value based on the compressor model
number.
Customer model number changes and service replacement
kit information for both replacement and retrofit (three
phase and single phase) are outlined within this section.
There will be three different electronic overcurrent protec-
tion modules that may be applied to allow for control wiring
in four control voltages. One of the modules is dual rated for
120 / 240 volts while the others are single-voltage rated at
24 VAC and 24 VDC. The new electronic system also
requires some changes to the compressor wiring. Wiring
specifications are shown in Section 4.11.
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