Hitachi ADVANCED COLOR PC-ARFH2E Manuel D'installation Et D'utilisation page 79

◆ Compensation factors for Heating / Cooling
The temperature of the water supplied by the YUTAKI unit to the circuits is determined by means
"Water calculation mode").
of OTC (See
This control determines water temperature according to the outdoor temperature. The higher the
outdoor temperature, the lower the building demand is, and in consequence the temperature of
the water supplied to the circuits is lower. Conversely, the thermal demand of the building rises
in the case of low outdoor temperature, and therefore the temperature of the supplied water
becomes higher.
The room temperature compensation control allows to modify the water temperature determined
by OTC control according to the setting room temperature and the actual room temperature.
In the case of heating, if the difference between room temperature and setting temperature is
large, then water temperature is increased by the YUTAKI unit in order to achieve the desired
room temperature in a faster way, thus compensating the thermal difference between setting
temperature and actual temperature.
In this manner, given two identical rooms, the YUTAKI unit determines the same room temperature
according to OTC control. On the other hand, for a room in which there is a wider difference
between setting temperature and actual temperature, the YUTAKI unit will increase the
temperature of the pumped water in order to ensure a similar heating up time until reaching the
setting temperature.
1
Compensation has no effect if Compensation factor is 0 or when OTC is Fix, and water temperature
is determined according to OTC in chapter "Water calculation mode" in such case.
The more the factor is increased, the more is water temperature increased by the YUTAKI unit
according to the difference between setting temperature and the current temperature.
Maximum compensation factor heat + and -: Maximum difference between room temperature
and setting temperature. In case that the difference between room temperature and setting
temperature is higher than this value, the YUTAKI unit takes the selected value as the maximum.
1.18.2 Water settings configuration
This menu is only visible for a room thermostat if the controller is not controlling the unit.
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