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Start-up and Commissioning
Sequence
Expand Condenser Water Temperature Optimizer Reset for the following:
Section 1 - Condenser Water System Optimizer – Enable Conditions (page 82)
Verify CWS Optimizer ON Switch is set to to DISABLED.
Section 2 - Manual Overrides of Condenser Water Reset (page 83)
Verify the following:
Manual "Reinitialize" & "Pause & Hold" are both Off.
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Manual "Quick Warm Up" conditions have been set appropriately to match the system's operating
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requirements. We recommend that you use the default values initially unless changes are required.
The quick warm up status displays Quick Warm Up is: OFF. If it is on, then determine which condition is
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causing it to display ON and correct as necessary.
Configure the First Reset by initially using the default value of 6 (deg). Adjust after observing the response.
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NOTE This value should be between 4.0 and 8.0 (deg).
EXAMPLE Your default Resting temperature (Condenser Water Optimizer Operation Overview - Notes >
Condenser Water Supply Setpoint Range - Based on OA Wet Bulb Temperature (the condenser water supply
temperature setpoint when the optimizer is off) is set to 8 degrees above wet bulb. Your First Reset priming
temperature might be 7 degrees above wet bulb. This first reset would lower the condenser water supply
temperature by 1 degree (from 8 degrees to 7 degrees above wet bulb). This would result in the fans running
slightly faster (increasing energy use at the fans) and lowering the lift slightly at the chiller (reducing energy
demand at the chiller). This First Reset starts the optimization program in its search for lower energy use and
balancing lower energy demand at the chiller with higher energy demand at the tower fans (and any variable
flow pumps).
Initially start with a default Input Smoothing value of 50 and then fine tune it according to your system.
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System Response Time in minutes: is set to the initial response time.
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NOTE Start with 5 minutes for a facility where the cooling towers are near the chiller, and 8 to 10 minutes for
a facility where they are remote.
Chilled Water System Optimizer v2
Installation and Start-up Guide
40
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