Data Aire dap 4 - Chilled Water Dehumidification; CW Valve Modulation Based on Dewpoint; CW Valve Modulation Based on Humidity

73•dap4UserManual
In DX mode, 2-cooling stages off as follows:
Cooling 2 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.0°F AND
Humidity Setpoint - Humidity Deadband - 0%
Cooling 1 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.2°F AND
Humidity Setpoint - Humidity Deadband - 1%
In DX mode, 4-cooling stages on as follows:
Cooling 1 on when dewpoint = High Dewpoint Setpoint- 0.6°F OR Humidity Setpoint - 3%
Cooling 2 on when dewpoint = High Dewpoint Setpoint - 0.4°F OR Humidity Setpoint - 2%
Cooling 3 on when dewpoint = High Dewpoint Setpoint - 0.2°F OR Humidity Setpoint - 1%
Cooling 4 on when dewpoint = High Dewpoint Setpoint - 0.0°F OR Humidity Setpoint - 0%
In DX mode, 4-cooling stages off as follows:
Cooling 4 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.0°F AND
Humidity Setpoint - Humidity Deadband - 0%
Cooling 3 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.2°F AND
Humidity Setpoint - Humidity Deadband - 1%
Cooling 2 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.4°F AND
Humidity Setpoint - Humidity Deadband - 2%
Cooling 1 off when dewpoint = High Dewpoint Setpoint - High Dewpoint DB - 0.6°F AND
Humidity Setpoint - Humidity Deadband - 3%
ChilledWaterDehumidication
Chilled Water valve opening
Chilled Water valve will open if dewpoint is increasing OR relative humidity is increasing closer
to the setpoints. Either high dewpoint or high relative humidity can cause the CW to open and
 callfordehumidication.ThemodulationoftheCWvalvewillbebasedonwhicheverhas 
 higherdemandforCWvalvetoopen.Forexample,ifdewpointrequirestheCWvalvetoopen
20% and humidity requires the CW valve to open 50%, as a result, CW valve will open 50%.
Individual logic for CW valve opening based on dewpoint and humidity is as followes:
CW valve modulation based on dewpoint
  Dehumidicationmodewillstartifreturndewpointrisestohigh_dewpoint_setpoint–1.0°F;
after that, CW valve will:
   Open10%ifreturndewpoint=high_dewpoint_setpoint–0.9°F
   Open20%ifreturndewpoint=high_dewpoint_setpoint–0.8°F
   Open30%ifreturndewpoint=high_dewpoint_setpoint–0.7°F
   Open40%ifreturndewpoint=high_dewpoint_setpoint–0.6°F
   Open50%ifreturndewpoint=high_dewpoint_setpoint–0.5°F
   Open60%ifreturndewpoint=high_dewpoint_setpoint–0.4°F
   Open70%ifreturndewpoint=high_dewpoint_setpoint–0.3°F
   Open80%ifreturndewpoint=high_dewpoint_setpoint–0.2°F
   Open90%ifreturndewpoint=high_dewpoint_setpoint–0.1°F
   Open100%ifreturndewpoint=high_dewpoint_setpoint
CW valve modulation based on humidity
  Dehumidicationmodewillstartifreturn_relative_humidityrisestohumidity_setpoint– 
1.0%; after that, CW valve will:
   Open10%ifreturn_relative_humidity=humidity_setpoint–0.9%