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IOM 1242-2 • PATHFINDER
®
MODEL AWV CHILLERS
Circuit Level Set Points
The settings in this section all exist for each individual circuit.
Table 39: Set Points for Individual Circuits
Description
Default
Range
Mode, Enabling, Configuration
Circuit Mode
Enable
Disable, Enable, Test
Capacity Control
Auto
Auto, Manual
Manual Speed
See Note 1
Condenser Control
Condenser Temp Target Max
50.0°C (122°F)
30.0
°
C to 55.0°C (86
°
F to 131°F)
Fan Staging Deadbands
See
Table 40 and Table 41
1 to 10°C (1.8 to 18°F)
Sensor Offsets
Evap Pressure Offset
0 kPa (0 psi)
-100 to 100 kPa (-14.5 to 14.5 psi)
Cond Pressure Offset
0 kPa (0 psi)
-100 to 100 kPa (-14.5 to 14.5 psi)
Oil Pressure Offset
0 kPa (0 psi)
-100 to 100 kPa (-14.5 to 14.5 psi)
Economizer Pressure Offset
0 kPa (0 psi)
-100 to 100 kPa (-14.5 to 14.5 psi)
Suction Temp Offset
0°C (0°F)
-5.0 to 5.0°C (-9.0 to 9.0°F)
Discharge Temp Offset
0°C (0°F)
-5.0 to 5.0°C (-9.0 to 9.0°F)
Economizer Temp Offset
0°C (0°F)
-5.0 to 5.0°C (-9.0 to 9.0°F)
Administrative and Service Support
Clear Cycle Timers
No
No, Yes
Service Pumpdown
Off
Off, On
Compressor Run Hours
0
0 to 999999 hours
Compressor Starts
0
0 to 65535
Event Log - Event Selection
Low Pressure Hold
Low Press Hold, Low Press Unload, High Press Hold, Hi Press
Unload, Low Pr Diff/Ration, Hi Motor Amps Hold, Hi Motor Amps
Unload, Hi VFD Amps Hold, Hi VFD Amps Unld, Hi VFD Temp Hold, Hi
VFD Temp Unld, Comp Start Fail, Part Load Shutdown
Event Log - Day Selection
Current
Current, 2nd Day, 3rd Day, 4th Day, 5th Day, 6th Day, 7th Day
NOTE:
The Manual Speed value will follow the compressor speed command while Speed Control = Auto. When Speed Control
= Manual, the Manual Speed set point can be set to the desired value. Manual Speed set point should have a maximum
value equal to the Maximum Compressor Speed set point for that circuit.
Fan Staging Deadbands
Fan Stage Deadband settings will only be visible if Fan VFD Configuration is set to None or 1st Fan VFD. The condenser fan
staging deadbands have different default values based on the Fan VFD Configuration set point. When that set point is changed, a
set of default values for the fan staging deadbands is loaded as shown.
Table 40:
Fan VFD Configuration = None
Set Point
Default Value Loaded
Fan Stage Up Deadband 0
4°C (7.2°F)
Fan Stage Up Deadband 1
5°C (9°F)
Fan Stage Up Deadband 2
5.5°C (9.9°F)
Fan Stage Up Deadband 3
6°C (10.8°F)
Fan Stage Up Deadband 4
6.5°C (11.7°F)
Fan Stage Up Deadband 5
6.5°C (11.7°F)
Fan Stage Down Deadband 1
10°C (18°F)
Fan Stage Down Deadband 2
8°C (14.4°F)
Fan Stage Down Deadband 3
5.5°C (9.9°F)
Fan Stage Down Deadband 4
4°C (7.2°F)
Fan Stage Down Deadband 5
4°C (7.2°F)
Table 41:
Fan VFD Configuration = 1st Fan VFD
Set Point
Default Value Loaded
Fan Stage Up Deadband 0
2.5°C (4.5°F)
Fan Stage Up Deadband 1
2.5°C (4.5°F)
Fan Stage Up Deadband 2
4°C (7.2°F)
Fan Stage Up Deadband 3
5°C (9°F)
Fan Stage Up Deadband 4
4°C (7.2°F)
Fan Stage Up Deadband 5
4°C (7.2°F)
Fan Stage Down Deadband 1
4°C (7.2°F)
Fan Stage Down Deadband 2
3.5°C (6.3°F)
Fan Stage Down Deadband 3
3°C (5.4°F)
Fan Stage Down Deadband 4
2.5°C (4.5°F)
Fan Stage Down Deadband 5
2.5°C (4.5°F)
Summary of Contents for Pathfinder AWV Series
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