CGC HKV020, Установка, эксплуатация и обслуживание

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Hybrid Vertical Stack – Installation Operation Maintenance Manual
OPERATION ‐ DETAILED
R090303 Installation Operation Maintenance Manual is subject to change without notice Page 12
start ‐ up. If the switch does not remake within the 5 minute ignore period, the
compressor will be immediately stopped.
e. Air Temperature Sensor Ta – Sensor Ta will prevent compressor operation if the
air flowing through the unit is below 60
°
F (15
°
C).
f. Water Temperature Sensor Tw – Sensor Tw will prevent compressor operation if
the outgoing system fluid temperature is above 140
°
F (60
°
C).
g. Refrigerant Temperature Sensor Tr – Sensor Tr will prevent compressor
operation if the coil temperature is below 35
°
F (2
°
C).
h. Any of the above faults will be indicated with the Diagnostic Code described
under DIAGNOSTICS
COOL OPERATION
2. Monitoring of the refrigerant cycle continues during operation of the compressor. The
following malfunctions will cause the compressor to shutdown:
a. If the head pressure exceeds the set point of the high pressure switch, it will
open, and the control board will terminate the compressor operation within 10
seconds. At this time the flash code 6 will be initiated on the red diagnostic LED.
Compressor operation will be restored in accordance with the “Intelligent Reset”
algorithm.
b. If the suction pressure drops below the set point of the low pressure switch, the
switch will open and if it remains open beyond the 5 minute ignore period after
start up, compressor operation will be terminated within 10 seconds.
Compressor operation will be restored in accordance with the “Intelligent Reset”
algorithm. A flash code of 5 on the red diagnostic LED will be initiated at this
time.
c. Intelligent Reset Algorithm – If a low or high pressure switch opens, the
compressor will be shut down. There is a 20 minute delay before the system is
automatically reset, after which if there is a cool call in place and all other
enablers are within the start parameters, the compressor will again be put into
operation. Should either of the pressure switches open again, the shutdown
procedure will cycle again, followed by a restart. The intelligent reset will allow
two open switch shutdowns and restarts in a 24 hour period, but a third
shutdown within 24 hours will put the refrigeration system into a full and hard
lockout requiring a power down to reset. If two or less switch open shutdowns
occur within a 24 hour period, they will be erased from memory and will not
contribute to a future hard lockout. (A hard lockout will prevent compressor