York 122, YLCC 42/62/82/102/112, YLCC-h, 152 Ylcc and YLCC-H control system, Standard components

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.

-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.

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).

-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).

FAN-1

(1) CONDENSER SENSOR-1

CONDENSER-1

EVAPORATOR-1

4-WAY VALVE-1

LWT SENSOR EXCHANGER-1

ANTIFREEZE HEATER-1

FLOW

SWITCH

LWT SENSOR EXCHANGER-2

ANTIFREEZE HEATER-2

FAN-2

(1) CONDENSER SENSOR-2

CONDENSER-2

EVAPORATOR-2

4-WAY VALVE-2

HIGH PRESSURE SWITCH-1

LOW PRESSURE SWITCH-1

EWTLOW

SENSOR PRESSURE SWITCH-2

PUMP

HIGH PRESSURE SWITCH-2

THERMAL PROTECTOR COMP.-1

THERMAL PROTECTOR COMP.-2

Note: (1) Used on heat pump models.

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