Data Aire dap 4 User Manual

67•dap4UserManual
Current Temperature = Setpoint + 0.7°F = 70% Position Open
Current Temperature = Setpoint + 0.6°F = 60% Position Open
Current Temperature = Setpoint + 0.5°F = 50% Position Open
Current Temperature = Setpoint + 0.4°F = 40% Position Open
Current Temperature = Setpoint + 0.3°F = 30% Position Open
Current Temperature = Setpoint + 0.2°F = 20% Position Open
Current Temperature = Setpoint + 0.1°F = 10% Position Open
Current Temperature = Setpoint + 0.0°F = 0% Position Open
4. If the temperature is consistently rising, the valve will open accordingly at each adjustment pe-
riod. Likewise, if the temperature is consistently falling, the valve will close accordingly at each
adjustment period. However, if the temperature changes directions, the temperature must
change the amount of the deadband before the valve will be repositioned. The temperature
can slowly drift back and forth within a deadband window at any point in the adjustment period
without a valve position change.
ENERGY SAVER and AUXILIARY CHILLED WATER COOLING
1.EnergySaver/AuxiliaryChilledWaterCoolingwillbeavailablewhenevertheincomingwater(or
water/glycol) supply is below the Energy Saver/Chilled Water temperature setpoint (Menu B –
Setpoint).
2.TheEnergySaver/AuxiliaryChilledWaterCoolingmodewilloperateonlyinatwo(2)degree
range. The range is between the return air setpoint plus deadband and two (2) degrees. If the
temperaturerisesabovethisrange,theEnergySaver/AuxiliaryChilledWaterCoolingwillbe
inhibited for the amount of time set in Menu J, “Energy Saver Lockout Time” and DX (Direct
Expansion)coolingwilltakeover.AftertheamountoftimesetinMenuJ–FactorySettings,
“EnergySaverLockoutTime”,itwilltryEnergySaver/AuxiliaryChilledWaterCoolingagain.
3. The chilled water valve proportionally opens 10% for each 0.1°F above the temperature set
point plus temperature deadband.
4. The chilled water valve responds to a change of the return air temperature after each adjust-
ment period.
5. If the temperature is consistently rising, the valve will be opened more at each adjustment pe-
riod. Likewise, if the temperature is consistently falling, the valve will be closed more at each
adjustment period. However, if the temperature movement changes directions, then it must
change the amount of the deadband before the valve will be repositioned. The temperature
can be slowly drifting back and forth within a deadband window at any point in the adjustment
period and no valve changes will be made.
6. If the current temperature is higher than at the last adjustment period, the following sequence
is used to determine the new valve position:
Current Temperature = Setpoint + Deadband + 0.0°F = 0% Position Open
Current Temperature = Setpoint + Deadband + 0.1°F = 10% Position Open
Current Temperature = Setpoint + Deadband + 0.2°F = 20% Position Open
Current Temperature = Setpoint + Deadband + 0.3°F = 30% Position Open
Current Temperature = Setpoint + Deadband + 0.4°F = 40% Position Open
Current Temperature = Setpoint + Deadband + 0.5°F = 50% Position Open

Data Aire dap 4 Specifications

General

Brand	Data Aire
Model	dap 4
Category	Control Unit
Language	English