Data Aire dap 4 User Manual

78•dap4UserManual
Current Temperature = Setpoint + Deadband + 0.0ºF = 0% Position
Current Temperature = Setpoint + Deadband + 0.1ºF = 10% Position
Current Temperature = Setpoint + Deadband + 0.2ºF = 20% Position
Current Temperature = Setpoint + Deadband + 0.3ºF = 30% Position
Current Temperature = Setpoint + Deadband + 0.4ºF = 40% Position
Current Temperature = Setpoint + Deadband + 0.5F = 50% Position
Current Temperature = Setpoint + Deadband + 0.6ºF = 60% Position
Current Temperature = Setpoint + Deadband + 0.7ºF = 70% Position
Current Temperature = Setpoint + Deadband + 0.8ºF = 80% Position
Current Temperature = Setpoint + Deadband + 0.9ºF = 90% Position
Current Temperature = Setpoint + Deadband + 1.0ºF = 100% Position
6. The chilled water valve proportionally closes 10% for each 0.1ºF below the
temperature setpoint + 1.0ºF.
7. If the current temperature is lower than at the last adjustment period, the following
sequence is used to determine the new valve position.
Current Temperature = Setpoint + 1.0ºF = 100% Position
Current Temperature = Setpoint + 0.9ºF = 90% Position
Current Temperature = Setpoint + 0.8ºF = 80% Position
Current Temperature = Setpoint + 0.7ºF = 70% Position
Current Temperature = Setpoint + 0.6ºF = 60% Position
Current Temperature = Setpoint + 0.5ºF = 50% Position
Current Temperature = Setpoint + 0.4ºF = 40% Position
Current Temperature = Setpoint + 0.3ºF = 30% Position
Current Temperature = Setpoint + 0.2ºF = 20% Position
Current Temperature = Setpoint + 0.1ºF = 10% Position
Current Temperature = Setpoint = 0% Position
8. When unit switches to DX mode because chilled water temperature is higher than
Energy saver chilled water setpoint or because of the temperature is higher than
setpoint plus deadband plus the energy saver change- over band, dap4 will use the
DX cooling logic above to maintain the return air temperature setpoint. All DX
safeties are applied.
9. If Chilled water temperature drops below Energy saver setpoint or return air
temperature drops below setpoint plus deadband then system will switch back to
Energy saver cooling after the energy saver lock out time delay.
d) Energysaver/AuxiliarycoolingwithDXcoolingassist.
 1. EnergySaver/AuxiliaryChilledWaterCoolingcanoperatesimultaneouslywith
compressor cooling if Energy saver assist mode is set to 1 Comp or 2 Comp and the
optional Discharge Air Sensor is required.
2. If Energy saver chilled water is available (inlet water temperature is below energy
saver water thermostat set in menu B-setpoint), the chilled water will be used as a
primary cooling, and DX will be a supplemental cooling.

Data Aire dap 4 Specifications

General

Brand	Data Aire
Model	dap 4
Category	Control Unit
Language	English