Hitachi YUTAKI S80 Series - Control Features; Flexible Space Heating Configuration and Control

2. Features and benets
TCGB0075 rev.0 - 11/2012
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2.6 Control features
2.6.1 Flexible space heating conguration and control

Many available system congurations
As mentioned before, YUTAKI S80 allows the control of a large variety of congurations.
N O T E
Forthedetailedinformation,pleaserefertothesection“Installationcongurations”.

Second water temperature control
YUTAKI S80 allows the water temperature control of two zones with different required temperatures (radiators + heating
oor for example) by means of the 2nd Temperature Room Thermostat (as accessory).
The mixing valve is controlled to maintain the second supply temperature at the second temperature set-point. The system
control then decides how much to open or close the mixing valve to achieve the desired position for the valve.
To heat pump
system control
To heat pump
Zone 1 system
Zone 2: Low temperature
Second temperature
control
Secondary
water pump
Motorized
3-way valve
Hydraulic
separator
N O T E
High temperature must be the direct circuit and low temperature must be the second circuit.