Data Aire Mini dap4 Installation, Operation & Maintenance Manual page 46

3. Reheat will be overridden by humidification when the humidifier setting is programmed for Computer, Non-Modulat
ing or Computer, Modulating (See Menu J – Factory Settings).
HUMIDIFICATION
1. Humidification will inhibit the reheat if programmed (See Menu J - Factory Settings) for Humidifier: Computer Non-
Modulating or Humidifier: Computer Modulating. Reheat is allowed during humidification if programmed for
Humidifier Comfort, Non-Modulating or Humidifier Comfort, Modulating.
2. There is a one (1) minute delay between the stop-to-start of humidification.
3. There is a five (5) minute delay between the dehumidification and start of humidification.
4. The humidification staging sequence of each adjustment period for ON/OFF of non-modulating humidifiers is as
follows:
Humidifier is ON at Humidity Setpoint – Humidity Deadband
Humidifier is OFF at Humidity Setpoint – 1.0%
5. The humidification staging sequence for a modulating humidifier is as follows:
Valve is OPENED at Humidity Setpoint – 1.0%
Valve is CLOSED at Humidity Setpoint – 0.5%
6. When the humidifier valve is opened, its position will follow a linear ramp that goes from 25% open with the
humidity at setpoint minus 0.5% to 100% open at setpoint minus humidity deadband.
DEHUMIDIFICATION
1. Dehumidification Mode can be programmed with one or two compressors (dual compressor units only) for
dehumidification and with or without reheat limits (See Menu J – Factory Settings).
2. If dehumidification is programmed for "In Limits" dehumidification will inhibit if the return air temperature drops to
temperature setpoint minus temperature deadband minus 2°F. Dehumidification will be inhibited until the return air
temperature rises to the temperature setpoint. Compressor short-cycle time will not be violated.
3. If dehumidification is programmed for "No Limits" it will remain ON until the humidity setpoint is reached. In this
mode dehumidification has priority and overcooling is disregarded. The reheat sequence will remain the same.
4. If dehumidification is programmed for two (2) compressors, with or without reheat limits, only one (1) compressor
will be allowed if reheat is required.
5. There is a one (1) minute delay between stop-to-start of dehumidification. Compressor short-cycle time delay will
not be violated.
6. There is a five (5) minute delay between dehumidification and humidification.
7. The compressor staging sequence for dehumidification at each adjustment period is as follows:
Cool 1 ON at Humidity Setpoint + Humidity Deadband
Cool 2 ON at Humidity Setpoint + Humidity Deadband + 1% (LCS Dual Compressor Units)
Cool 2 OFF at Humidity Setpoint + 1% (LCS Dual Compressor Units)
Cool 1 OFF at Humidity Setpoint
8. The sequence for dehumidification 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
46 • Mini dap4 User Manual