Data Aire dap4 touch, Инструкция по установке, эксплуатации и обслуживанию

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77 • dap4 User Manual
For instance: SP = 72, DB = 2, STS = 0.3. Compressor will be on at 74.3 deg.
Return air temperature is dropping (Off cycle):
-- Fixed speed compressor C2 turns off when return air temperature drops below
temperature setpoint – STS band (default STS band=0.3 deg F) for duration of C2
off delay (default =5s). For instance: SP = 72, STS = 0.3 Compressor goes off at
71.7 degrees after 5 seconds delay.
-- After Fixed speed compressor C2 turns off, variable speed compressor C1 ramps
up to its maximum speed and operates at maximum speed for a “Delay Modulation”
period (default=60s). The Delay modulation is set in the Compressor/Factory
settings menu.
-- Variable speed compressor C1 will then modulate to maintain setpoint and turns
off when return air temperature drops to temperature setpoint – C1offset
(default=2degF); and C1 has operated for at least minimum runtime period.
For instance: SP= 72, C1 offset = 2, compressor goes off at 70 deg if it has ran for
6 minutes (minimum runtime is set to 6 minutes).
c) Energy saver/ auxiliary cooling without DX cooling assist.
1. Energy Saver/Auxiliary Chilled Water Cooling will be available whenever the
incoming water supply is below the setpoint of the Energy saver Water Thermostat
in menu B-setpoint – Energy Saver
2. The Energy Saver/Auxiliary Chilled Water mode will operate when space
temperature is between the return air setpoint plus deadband and plus Energy
saver to DX change-over band. If the temperature rises above this range, Energy
Saver/ Auxiliary Chilled Water Cooling will be inhibited for at least 15 minute to an
hour (see Energy saver Lockout setting in Factory settings menu for details) and
only DX cooling will be available. After a lockout time delay, system will try Energy
Saver/Auxiliary Chilled Water Cooling again.
3. The chilled water valve proportionally opens 10% for each 0.1ºF above the
temperature se temperature deadband.
4. If the temperature is consistently rising, then the valve will be opened wider.
Likewise, if the temperature is consistently falling, then the valve will be close
gradually. However, if 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 position changes will be made.
5. If the current temperature is higher than temperature setpoint, the following
sequence is used to determine the new valve position.