68 • dap4 User Manual
Current Temperature = Se De 0.6°F = 60% Position Open
Current Temperature = Se De 0.7°F = 70% Position Open
Current Temperature = Se De 0.8°F = 80% Position Open
Current Temperature = Se De 0.9°F = 90% Position Open
Current Temperature = Se De 1.0°F = 100% Position Open
7. The chilled water valve proportionally closes 10% for each 0.1°F below the temperature set
point plus 1°F.
8. 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 = Se 1.0°F = 100% Position Open
Current Temperature = Se 0.9°F = 90% Position Open
Current Temperature = Se 0.8°F = 80% Position Open
Current Temperature = Se 0.7°F = 70% Position Open
Current Temperature = Se 0.6°F = 60% Position Open
Current Temperature = Se 0.5°F = 50% Position Open
Current Temperature = Se 0.4°F = 40% Position Open
Current Temperature = Se 0.3°F = 30% Position Open
Current Temperature = Se 0.2°F = 20% Position Open
Current Temperature = Se 0.1°F = 10% Position Open
Current Temperature = Se 0.0°F = 0% Position Open
9. The dap4 will switch the unit to DX cooling for one (1) hour after every 100 hours of continuous
hours of Energy Saver or Auxiliary Chilled Water Cooling.
ENERGY SAVER and AUXILIARY CHILLED WATER COOLING ASSIST
1. Energy Saver/Auxiliary Chilled Water Cooling can operate simultaneously with compressor
cooling. An optional discharge temperature sensor is required.
2. The Energy Saver/Auxiliary Chilled Water Cooling will be the same and the compressor rules
for short-cycle time will not be violated.
3. The following is the compressor staging sequence at each adjustment period.
UNITS WITH STANDARD (DUAL) SCROLL COMPRESSORS
Cool 1 ON at Temperature Se Temperature De 1.3°F and Valve 100% Open
Cool 2 ON at Temperature Se Temperature De 1.6°F and Valve 100% Open
Cool 2 OFF at Temperature Se 1.6°F and Valve 100% Open
Cool 1 OFF at Temperature Se 1.3°F and Valve 100% Open until next adjustment period
UNITS WITH OPTIONAL TANDEM SCROLL or SEMI-HERMETIC (W/UNLOADING) COMPRESSORS
Cool 1 ON at Temperature Se Temperature De 1.3°F and Valve 100% Open
Cool 2 ON at Temperature Se Temperature De 1.6°F and Valve 100% Open
Cool 3 ON at Temperature Se Temperature De 1.9°F and Valve 100% Open
Cool 4 ON at Temperature Se Temperature De 2.2°F and Valve 100% Open
Содержание dap4 touch
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