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HumiTherm Ultra
User Manual
The figure above illustrates 3 cases. Case (1) illustrates power-up delay. In case (2); the time elapses before PV rises above
the SP. The compressor is thus switched ON as soon as the PV rises above the SP. In case (3); the PV rises above the SP while
the time delay is still in progress. The compressor is switched ON as soon as the delay time elapses.
The following table list various parameters related to Compressor Switching Mode / Operation & their respective locations.
Compressor
Status
OFF
ON
20.0
19.8
21.0
°C
Case 2
Case 3
Case 1
PV (Temperature)
SP
Compressor Switch-ON Level
Compressor Switch-OFF Level
Compressor Switch-ON Level = 20.0 + 1.0 = 21.0°C
Temperature SP = 20.0°C
Compressor Set-point = 1.0°C
Compressor Hysteresis = 1.2°C
Compressor Switch-OFF Level = 21.0 - 1.2 = 19.8°C
Parameter Name
Navigation
(Where to Locate)
Factory
Compressor
Mode
Boundary SP
Time Delay
Hysteresis
Zone Select