Controller Operation
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IOM 1242-8 • PATHFINDER
®
MODEL AWV CHILLERS
Set Points
The following parameters are remembered during power off (permanent memory), are factory set to the Default value, and can be
adjusted to any value in the Range column.
Unit Level Set Points
All of these settings require the unit switch to be off in order to make a change and require rebooting the controller in order to apply
a change. Unit modes Cool/Ice and Ice will both require Evaporator Glycol set point to have Yes selected.
Table 36: Set Point Default and Range
Description
Default
Range
Basic Unit Configuration
Input Voltage
Not Set
Not Set, 380, 400, 460, 575
Evaporator Configuration
Not Set
Not Set, Packaged, Remote
Ground Fault Protection Option
No
No, Single Point, Multi Point
Refrigerant Economizers
Yes
No, Yes
Refrigerant Economizer Piping
Not Set
Not Set, Steel, Copper
Liquid Line Solenoid Valves
No
No, Yes
Liquid Injection
No
No, Yes
Condenser Fan Configuration
Not Set
Not Set, No VFD, 1st Fan VFD, All Fan VFD
RapidRestore
No
No, Yes
Evaporator Glycol
No
No, Yes - Modes Cool/Ice and Ice will require Evaporator Glycol to be Yes.
Available Modes
Cool
Cool, Cool/Ice, Ice
Oil Presence Sensors
Yes
No, Yes
Compressor VFD Parameter Set
No
No, Yes
Circuit #1 Compressor Type
Not Set
Not Set, F3ALVVR60, F3ALVVR86, F3BLVVR86, F4ALVVR80
Circuit #2 Compressor Type
Not Set
Not Set, F3ALVVR60, F3ALVVR86, F3BLVVR86, F4ALVVR80
Circuit #1 Compressor Max Speed
45 Hz
45 to 60, 45 to 70, 45 to 80, 45 to 86, 45 to 90 - Dependent on type
Circuit #2 Compressor Max Speed
45 Hz
45 to 60, 45 to 70, 45 to 80, 45 to 86, 45 to 90 - Dependent on type
Circuit 1 Compressor VFD Input RLA
100
1 to 1000 amps
Circuit 2 Compressor VFD Input RLA
100
1 to 1000 amps
Circuit #1 Number of Fans
Not Set
Not Set, 4, 6, 8, 10, 12, 14, 16
Circuit #2 Number of Fans
Not Set
Not Set, 4, 6, 8, 10, 12, 14, 16
Circuit #1 Evaporator EXV Type
Not Set
Not Set, E6V, ETS50, ETS100, ETS250, ETS400
Circuit #2 Evaporator EXV Type
Not Set
Not Set, E6V, ETS50, ETS100, ETS250, ETS400
Unit Mode and Enabling
Unit Enable
Enable
Disable, Enable
Unit Enable Initial Value
Enable
Disable, Enable
Control source
Local
Local, Network
Unit Test Mode
Off
Off, On
Staging and Capacity Control
Cool LWT
6.67°C (44°F)
See Dynamic Set Point Ranges section
Ice LWT
-3.89°C (25°F)
-8.33
°
C to -2.22°C (17
°
F to 28°F)
Startup Delta T
2.7°C (4.9°F)
1.67 to 5.0°C (3 to 9.0°F)
Shut Down Delta T
1.5°C (2.7°F)
0 to 2°C (0 to 3.6°F)
Stage Up Delta T
1.0°C (1.8°F)
0 to 2°C (0 to 3.6°F)
Stage Down Delta T
1.0°C (1.8°F)
0 to 1.7°C (0 to 3.1°F)
Stage Up Delay
3 minutes
0 to 60 minutes
Stage Delay Clear
No
No, Yes
EWT Pulldown Limit Max
3°C/min (5.4°F/min)
2 to 6°C/min (3.6 to 10.8°F/min)
Light Load Stage Down
40%
20 to 50%
High Load Stage Up
80%
50 to 90%
Max Number of Circuits Running
2
1-2
Sequence Number Circuit #1 - #2
1
1-2
Ice Cycle Delay
12
1-23 hours
Clear Ice Delay
No
No, Yes
RapidRestore Max Power Off Time
15 seconds
15 to 180 seconds