Data Aire dap 4 User Manual

72•dap4UserManual
Cool 4 ON at Humidity Setpoint + Humidity Deadband + 3%
Cool 4 OFF at Humidity Setpoint + 3%
Cool 3 OFF at Humidity Setpoint + 2%
Cool 2 OFF at Humidity Setpoint + 1%
Cool 1 OFF at Humidity Setpoint
8.ThesequencefordehumidicationwithEnergySaverorAuxiliaryChilledWaterCoolingisas
follows:
Valve is OPENED to 100% at Humidity Setpoint + Humidity Deadband
Valve is CLOSED at Humidity Setpoint
DEHUMIDIFICATION FOR CHILLED WATER UNITS
1.Allthestandarddehumidicationrulesfordehumidicationwithcompressorsappliestochilled
water units.
2. The chilled water valve responds to a change of the return air relative humidity (RH) after each
adjustment period. When a change is made to the setpoint, the chilled water valve will delay its
 responseforve(5)minutesafterwhichitwillrespondaftereachadjustmentperiod.
3.Thedehumidicationsequenceforchilledwaterunitsisasfollows:
Valve is OPENED to 100% at Humidity Setpoint + Humidity Deadband
Valve is CLOSED at Humidity Setpoint
DEWPOINT LOGIC
Relevant Menu Settings and Display
1. There will be additional menus required to program for Dewpoint control in dap4 and Mini-dap4:
Menu B - Setpoints
- High Dewpoint setpoint (Range 50 to 65) - default 59°F
- High Dewpoint Deadband (Range 1.0 to 3.0) - default 1°F
- Low Dewpoint setpoint (Range 40 to 55) – default 45°F
- Low Dewpoint Deadband (Range 1.0 to 3.0) - default 1°F
The high and low dewpoint setpoint cannot overlap.
Menu J - Factory Settings – Humidity settings menu
- Control: Rel. Hum or Dewpoint
2. Display will show dewpoint when this mode is selected.
DXDehumidication
In DX mode, 2-cooling stages on as follows:
Cooling 1 on when dewpoint = High Dewpoint Setpoint - 0.2°F OR Humidity Setpoint - 1%
Cooling 2 on when dewpoint = High Dewpoint Setpoint - 0.0°F OR Humidity Setpoint - 0%

Data Aire dap 4 Specifications

General

Brand	Data Aire
Model	dap 4
Category	Control Unit
Language	English