143
COMP/ALARM
The compressor contactor output is a relay output. The relay
operating voltage is 24 to 240 VAC with a maximum con-
tinuous current of 2.5 amps (600 VA). The compressor
COMP contactor will open when any of the following con-
ditions exist:
• Loss of 24 VAC supply power
• Discharge temperature sensor failure, discharge tem-
perature >295 F
• The input demand voltage is > 8.0 VDC.
The Comp/Alarm contactor should be wired into the
compressor’s control power circuit if the Carlyle dis-
charge temperature sensor is being used to control com-
pressor discharge temperature. This will ensure the
compressor will shut down if discharge temperature
exceeds 295 F or sensor fails. The triac output for Coil 1,
Coil 2, and the LIV (Liquid Injection Valve) will open, dis-
abling the unloader valves and liquid injection valve if the
Comp/Alarm contactor is opened.
CYLINDER HEAD FAN LEAD WIRES
The smart controller has two 6-in. lead wires for wiring to
the compressor’s cylinder head fan. The smart controller
will energize/de-energize the internal cylinder head fan
relay as required to maintain discharge temperatures below
220 F. The lead wires are rated for 230/460 VAC with a
maximum continuous rating of 2.5 amps.
AC IN
Line voltage input to provide power to the unloader solenoid
coils and the liquid injection solenoid coil. Rated for 115/
208-230 VAC with a maximum continuous rating of 30 VA.
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