Delay Btw Stages: Is the minimum time it will take to stage the next compressor
on. Selection is 30 to 300 seconds with a default setting of 60 seconds.
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R
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3600
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Note: This Compressor Settings screen is only shown on the IRDX model.
Type: The available compressor selections include: None -
Selection for chilled water cooling only. On/Off
Comp - One fixed speed compressor. Variable -
One variable speed compressor (Default).
Mode: The compressors will be used to maintain:
Ret T-Constant- Compressor will run at a constant speed to maintain the
return air temperature.
Ret T-Variable- Compressor will modulate in speed to maintain the return
air temperature.
Dis T-Variable- Compressor will modulate in speed to maintain the
discharge air temperature.
D T-Var Latent- Compressor will modulate in speed to maintain the
discharge air temperature based on the calculated latent set point.
Run Speed: (Only show when mode is Ret-T Constant) Selection is from 1800 to
5400rpm with a default setting of 3600rpm.
DX Delay: Initialize (default) The compressors are delayed from starting after the
system has been on for the initial 60 seconds.
Every Cycle The compressors are delayed from starting on each cooling
or dehumidification cycle. This mode is useful to allow time for glycol to flow.
The time setting should be adjusted for adequate flow to occur.
Range of adjustment is 0 to 600 seconds with a default of 5 seconds.
Min Run Time: Once a compressor is started, it must run for at least this much
time. Range of adjustment is 1 to 10 mins with a default of 3 mins.
Min Off Time: After a compressor stops, it must wait at least this much time before
it can be restarted. Range of adjustment is 2 to 10 mins with a default of 2
mins.
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