Hitachi PSC-A1T Technical Catalogue

6 Building air conditioning controls
CSNET WEB (PSC-A160WEB1)
TCGB0106 rev.0 - 12/2014
475475
6
MAXOAT: Maximum outdoor ambient temperature for heat operation.
- Preset 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.
USERMIN: Minimum Setting temperature. If the selected temperature is lower, CSNET WEB will use USERMIN as the
value for the Setting temperature, changing this value as soon as the operation mode changes.
- Preset adjustment: +20°C.
- 1°C steps.
- 17°C... 30°C margin.
USERMAX: Maximum Setting temperature. If the selected temperature is higher, CSNET WEB will use USERMAX as the
value for the Setting temperature, changing this value as soon as the operation mode changes.
- Preset adjustment: +25°C.
- 1°C steps.
- 17°C... 30°C margin.
HYSTC: Value of the temperature difference calculated to pass from heat to cool mode.
- Preset 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.
DELAY: The time which must elapse between the last change of operation mode to the next change.
- Preset adjustment: 20 min.
- 10 min steps.
- 20 min... 60 min margin.
CORRECTION: Temperature corrected on changing the operation mode, to ensure greater comfort..
- Preset 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

Hitachi PSC-A1T Specifications

General

Brand	Hitachi
Model	PSC-A1T
Category	Controller
Language	English