9
Damper Valve
Feedback Fully Close
DI2 IOB2
High Pressure Switch DI3 IOB2
Ice Build Contact DI4 IOB2 User option, dry contact
Oil Heater Relay DO1 IOB2
Oil Pump Relay DO2 IOB2
Economizer Damper
Valve Open
DO3 IOB2
Economizer Damper
Valve Close
DO4 IOB2
Low Speed ME Brg
Temp
AI1 IOB3
Low Speed CE Brg
Temp
AI2 IOB3
High Speed ME Brg
Temp
AI3 IOB3
High Speed CE Brg
Temp
AI4 IOB3
Remote Reset Sensor AI5 IOB3 User option, 5K thermistor
Guide Vane 1 Actual
Pos
AI6 IOB3
Common CHWS
Temp
AI7 IOB3 Used for lead lag option
Auto Water Temp
Reset
AI8 IOB3 User option, 4~20mA
Common CHWR
Temp
AI9 IOB3 Used for lead lag option
Head Pressure
Output
AO1 IOB3 Factory option
EC Valve Feedback
Fully Open
DI1 IOB3 Factory option
EC Valve Feedback
Fully Close
DI2 IOB3 Factory option
Spare Safety DI3 IOB3 User option, dry contact,
normal open
Power Request
Feedback
DI4 IOB3 Marine option
EC Valve Solenoid /
Open
DO1 IOB3 Factory option
EC Valve Close DO2 IOB3 Factory option
Free Cooling Mode DO3 IOB3 Factory option
Power Request
Output
DO4 IOB3 Marine option
Entering Evap Water
Pressure
AI3 IOB4 User option, if IOB4
installed, same as follows
Leaving Evap Water
Pressure
AI4 IOB4 User option
Entering Cond Water
Pressure
AI5 IOB4 User option
Leaving Cond Water
Pressure
AI6 IOB4 User option
Evap Water Flow
Measurement
AI8 IOB4 User option, 4~20mA
Cond Water Flow
Measurement
AI9 IOB4 User option, 4~20mA
Chilled Water Pump
(Variable)
AO1 IOB4 User option, 4~20mA/0~5V
Condenser Water
Pump (Variable)
AO2 IOB4 User option, 4~20mA/0~5V
Tower Fan (Variable) AO3 IOB4 User option, 4~20mA/0~5V
Customer Alert DI3 IOB4 Marine option, dry contact
Free Cooling Start
Switch
DI4 IOB4 Marine option, dry contact
Chilled Water Pump DO1 IOB4 User option
Condenser Water
Pump
DO2 IOB4 User option
Tower Fan High DO3 IOB4 User option
Tower Fan Low DO4 IOB4 User option
19XR2~E/V/D I/O, 19XRC mapping:
Entering Chilled
Water Temperature
AI1 IOB1
Leaving Chilled Water
Temperature
AI2 IOB1
Entering Condenser
Water Temperature
AI3 IOB1
Leaving Condenser
Water Temperature
AI4 IOB1
Evap. Refrigerant
Liquid Temperature
AI5 IOB1
Comp Discharge
Temperature
AI6 IOB1
Condenser Pressure AI7 IOB1
Evaporator Pressure AI8 IOB1
FS VFD Load Current AI10 IOB1 For free standing VFD
Variable Speed Oil
Pump
AO1 IOB1 Factory option
Oil EXV Output AO2 IOB1 Factory option, 4~20mA
EC Valve Output mA AO3 IOB1 Factory option, 4~20mA
Chiller Lockout Input DI1 IOB1 User option, dry contact,
normal open
Spare Safety DI2 IOB1 User option, dry contact,
normal open
Remote Contact Input DI3 IOB1 User option, dry contact,
“Closed” indicates Turn ON
the chiller
Remote Emergency
Stop Input
DI4 IOB1 User option, dry contact,
“Closed” indicates chiller
emergency stop
Stage 1 IGV Increase DO1 IOB1
Stage 1 IGV
Decrease
DO2 IOB1
Chiller Alarm Relay DO3 IOB1 User option, 24VAC output,
recommend with external
power supply
Motor Winding
Temperature 1
AI1 IOB2
Thrust Bearing Oil
Temperature
AI2 IOB2
Oil Sump
Temperature
AI3 IOB2
Oil Supply
Temperature
AI4 IOB2 Factory option
Guide Vane 1 Actual
Pos
AI5 IOB2
Oil Supply Pressure AI6 IOB2
Oil Sump Pressure AI7 IOB2
EC Valve Feedback AI8 IOB2 Factory option, 4~20mA
Motor Winding
Temperature 2
AI9 IOB2 For high voltage motor
Motor Winding
Temperature 3
AI10 IOB2 For high voltage motor
Diuser Pressure AI11 IOB2 Factory option
Guide Vane1 Output AO1 IOB2 Factory option, for 4~20mA
type guide vane
Diuser Output AO2 IOB2 Factory option
Evap Water Flow
Switch
DI1 IOB2 User option, dry contact,
“Closed” indicates “FLOW”
Cond Water Flow
Switch
DI2 IOB2 User option, dry contact,
“Closed” indicates “FLOW”
Ice Build Contact DI4 IOB2 User option, dry contact
Oil Heater Relay DO1 IOB2
Oil Pump Relay DO2 IOB2
EC Valve Soleniod /
Open
DO3 IOB2 Factory option
Vapor Source SV DO4 IOB2 Factory option, for 19XRC
Heat Reclaim
Entering Temp
AI3 IOB3 Heat reclaim option
Heat Reclaim Leaving
Temp
AI4 IOB3 Heat reclaim option
Remote Reset Sensor AI5 IOB3 User option, 5K thermistor
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