Data Aire dap4 User Manual page 43

MENU J – FACTORY SETTINGS (factory level) continued
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.
Min Run Time: (Only shown when variable compressor selected). Once the
variable 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.
Run Speed: (Only show when mode is constant speed) Selection is from 1800 to
5400rpm with a default setting of 3600rpm.
HP Lockout: The selection of when the compressor should be locked out due to
high pressure alarms. (On units with auto-reset HP switch only). Once
locked out, the compressor will not return to service until the alarm is
acknowledged and cleared. Selections are: None (comps do not get locked
out), or at a maximum HP alarm frequency of: Max 2/Hr, Max 3/Hr, Max
4/Hr or Max 5/Hr. The default setting is None.
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