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Operating and start-up instructions
YLCC and YLCC-H control system
The YLCC and YLCC-H-42, 62, 82 and 102 (two separate
compressors and two cooling circuits) is a multipurpose con-
troller programmed for use with air-water chiller and heat pump
units.
Standard components
- System and first cooling circuit control base plate. This
is the central nucleus that processes the signals coming
from the probes and protection elements of the entire sys-
tem. Directly receives the signals from the first circuit and
controls its active elements: compressor 1, fan 1, 4-way
valve 1, water circulating pump, alarm relay and antifreeze
heater 1 (if installed). 24 Vac.
- Second cooling circuit expansion and control board.
This is an expansion of the base plate to be connected by
means of a specific connector. Receives the signals from
the second circuit and controls its active elements: com-
pressor 2, fan 2, 4-way valve 2 and backup heater 2 (if in-
stalled).
- Local terminal. For accessing and controlling the system
by means of the display, keys and LEDs. Allows selecting
cool, heat and off functions. Also allows changing operat-
ing parameters, as well as monitoring the system. Can be
installed at a distance of 2 m. from the base plate. Is in-
cluded inside the control panel and is to be connected to
the base plate by means of an 8-lead telephone cable.
- Fan ON/OFF control module. Used on heat pump units
with centrifugal fans equiped with three-phase motors with
on speed control. These modules should be connected to
the base and expansion plates respectively. They act di-
rectly upon the fan contactor.
- NTC probes. 5 NTC probes are used to read system tem-
peratures. One is located at the common water intake of
the two evaporating units, another two at each water outlet
of said units, and the remaining two at the coil to control
defrost cycles. (On cooling units, 3 NTC probes are used:
one at water intake and two at water discharge).
Note: (1) Used on heat pump models.
ANTIFREEZE
HEATER-1
CONDENSER SENSOR-1
FAN-1
CONDENSER-1
EVAPORATOR-1
CONDENSER SENSOR-2
FAN-2
CONDENSER-2
EVAPORATOR-2
ANTIFREEZE
HEATER-2
4-WAY
VALVE-1
HIGH
PRESSURE
SWITCH-1
THERMAL PROTECTOR
COMP.-1
PUMP
EWT
SENSOR
FLOW
SWITCH
LWT SENSOR
EXCHANGER-1
LWT SENSOR
EXCHANGER-2
4-WAY
VALVE-2
HIGH
PRESSURE
SWITCH-2
THERMAL PROTECTOR
COMP.-2
LOW PRESSURE
SWITCH-1
LOW
PRESSURE
SWITCH-2
(1)
(1)