Table of Contents
Advertisement
AI11
These inputs indicate the panel temperature (optional).
This applies to Heating Mode. It is used when
temperature control inside control panel is required
either heating (for cold environment) or cooling (for hot
environment).
Analog Outputs
Analog output (AO) data includes these parameters:
AO1
These outputs indicate the variable speed of Fan Bank
1.
AO2
These outputs indicate the variable speed of Fan Bank
2.
AO3
These outputs indicate the evaporator's isolation valve
position.
AO4
These outputs indicate the evaporator's flow demand
hard-wired signal for BAS.
AO5
These outputs indicate the variable speed
compressor's hard-wired control signal.
Digital Inputs
Digital input (DI) data includes these parameters:
Digital LEDs
There is an LED for each digital input that indicates its
current state. For all inputs, the color of the LED
signifies its current state:
G G r r e e e e n n L L E E D D — This digital input is energized, the
connected device is closed.
G G r r a a y y L L E E D D — This digital input is de-energized, the
connected device is open.
DI1 Remote On/Off
This activates a module on or off via digital input. If the
primary digital on-off input is enabled, toggling the D D I I 1 1
on the primary module will turn the entire chiller/heater
on or off.
DI2, DI3
These show the Discharge / Suction Pressure switches
of Circuit 1. DI closed - pressure is in the normal range;
ARTC-SVX001B-EN
DI opened - pressure is exceeding normal range
threshold (faulty state).
DI4
These show the state of Evaporator flow switch. DI
closed - flow present; DI opened - flow absent.
DI8 Phase Monitor
This is feedback for the three-phase power supply
protection feature. If the digital input for this switch
indicates closed, there are no power supply issues. If
the digital input for this switch indicates open, a power
supply failure has been detected.
If common power supply protection module is used for
the chiller, its failure will affect each module. In such a
case this DI is optional for secondary module.
DI9
This is the feedback for Pump-down pressure switch of
Circuit 1. DI closed - pressure is in the normal range; DI
opened - pressure is exceeding normal range threshold
(faulty state).
Digital Outputs
There is an LED for each digital output which shows its
current state.
Digital LEDs
There is an LED for each digital input that indicates its
current state. For all inputs, the color of the LED
signifies its current state:
G G r r e e e e n n L L E E D D — This digital output is energized, the
connected device is powered up or running.
G G r r a a y y L L E E D D — This digital output is de-energized, the
connected device is not powered up or not running.
DO1, DO2 Comp On/Off
This digital output turns a compressor on and off.
DO3 Liq Line Solenoid
This digital output energizes and de-energizes the
liquid line solenoid valve.
DO4 Free Cooling Valve
This digital output energizes / deenergizes Free Cooling
diverting valve. When Free Cooling is active, this valve
is utilized to direct Evaporator Flow via Free Cooling
Condenser coils that maintain System Chilled Water
Temperature in Free Cooling Mode.
DO6-DO8 Fans 1, 2, 3
This digital output is used to turn fans of Fan Bank 1 on
and off.
O O p p e e r r a a t t i i n n g g P P r r o o c c e e d d u u r r e e s s
35
Advertisement
Table of Contents
