Carrier 30AJ, Инструкция по установке, эксплуатации и обслуживанию

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6. Control speci fi cations
6.1 Logic control unit
Description: Logic control unit for liquid chillers with the
following characteristics:
• Control panel of the “Soft Touch” type with on/off
keys and indicators of: Power supply, compressor
in operation, timer, protection against freezing and
protection by pressostats.
• A n a l o g i n p u t s f o r l e a v i n g / r e t u r n w a t e r
temperature sensors.
• Digital inputs for: Selection of the freezing temperature
(2°C o –7°C), protection pressostat and inlets to control
the distance.
• Control outlets for the compressor and liquid
line solenoid.
• Potentiometer to set the temperature and water outlet.
6.2 Control board diagram
6.3 Description of terminals
24V, GND : Power supply for the control board,
24Vca - 50/60Hz.
IN 1 : Pressostat input
IN 2 : Power supply for the solenoid valve
IN 4 : Freezing temperature
selection: without connecting
it is equivalent to 2°C, connecting to
24Vca it is equal to –7°C.
IN 5 : Remote On/Off: without connecting, the
unit remains off, connecting at 24Vca,
the unit will turn on remotely or locally
depending on the IN6 input.
IN 6 : Remote control activation: Without
connecting, the control is local through
the control front buttons, connecting
at 24VCa, the remote control is made
through the IN5 input.
Connecting
adjustment
temperature
Connecting
front of the
control
A 3 : Connector for the water temperature
s e n s o r a t t h e c h i l l e r o u t l e t
(inside sensor).
A 4 : Connector for the water temperature
sensor outside the chiller (outside
sensor).
OUT1 : Output for the activation of the
compressor contactor.
OUT2 : O u t p u t f o r t h e l i q u i d l i n e
solenoid activation.
6.4 Control front buttons and indicators
P1 : OFF button.
P2 : ON button.
L1 : Equipment ON indicator.
L2 : Operating compressor indicator.
L3 : Activated anti-cycling timer indicator.
L4 : Anti-freeze device activated.
L5 : Pressostat opening indicator.
L6 : Power supply ON Indicator.
To board control
L1
L2
L3
L4
L5 L6
P1
P2