Hitachi PSC-A1T - Page 580

6 Building air conditioning controls
CSNET Manager LT/XT
TCGB0106 rev.0 - 12/2014
564564
- Correction value: Temperature corrected on changing the operation mode, to ensure greater comfort..
- Pre set adjustment: 0.
- 1ºC steps.
- Margin: 0, 1, 2.
The Setting temperature is adjusted using the following formula when the operation mode is changed, depending
on the DIFF option selected:
Correction value Change from cool to heat Change from heat to cool
0 Corrected temp = Setting temp Corrected temp = Setting temp
1 Corrected temp = Setting temp + 0 Corrected temp = Setting temp + 1
2 Corrected temp = Setting temp - 1 Corrected temp = Setting temp + 1
Where:
Corrected temperature: Temperature used to calculate the change of operation mode.
Setting temperature: Temperature selected by CSNET or by the remote control of the indoor unit.
NOTE
The remote control and the CSNET always show the corrected temperature (the result is the setting temperature).
• Hysteresis:
- HYSTC: Value of the temperature difference calculated to pass from heat to cool mode.
- Pre set adjustment: + 2°C.
- 0.1°C steps.
- 1°C... 2°C margin.
- HYSTH: Value of the temperature difference calculated to pass from cool to heat mode.
- Preset adjustment: 1.3°C.
- 0.1°C steps.
- 1°C... 2°C margin.
• Ta Limits:
- MAXOAT: Maximum outdoor ambient temperature for heat operation.
- Pre set adjustment: +20°C.
- 1°C steps.
- 0°C... 40°C margin.
- MAXOAT should be higher than MINOAT.
- MAXOAT should be lower than the dry bulb (DB) temperature equivalent to the margin of maximum outdoor
ambient temperature for the heat mode:
- The margin of maximum outdoor ambient temperature for heat mode of the outdoor unit is 15.5 WB
- Equivalent dry bulb temperature:
Relative humidity of 95% = 16 DB
Relative humidity of 77% = 18 DB
Relative humidity of 62% = 20 DB
Relative humidity of 50% = 22 DB, etc.
- MINOAT: Minimum outdoor ambient temperature for cool operation.
- Pre set adjustment: +10°C.
- 1°C steps.
- 0°C... 40 °C margin.