Hitachi PC-ARF Technical Catalogue page 580

6 Building air conditioning controls
CSNET Manager LT/XT
- 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
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.
N O T E
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.
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TCGB0106 rev.0 - 12/2014
Change from cool to heat
0 Corrected temp = Setting temp
1 Corrected temp = Setting temp + 0
2 Corrected temp = Setting temp - 1
Change from heat to cool
Corrected temp = Setting temp
Corrected temp = Setting temp + 1
Corrected temp = Setting temp + 1