Hitachi YUTAKI S80 Series - Start-Up Benefits; Start-Up by Pressing the Run;Stop Button of LCD Users Interface; Floor Screed Drying (Circuits 1 & 2) (Optional Function); Test Run Operation from LCD Users Interface

2. Features and benets
TCGB0075 rev.0 - 11/2012
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2.4 Start-up benets
2.4.1 Start-up by pressing the Run/Stop button of LCD user’s interface
The unit is factory set to work only by pressing the Run/Stop button of the LCD user’s interface.
The default value is set for one circuit (Direct) with OTC gradient for heating space of 1.4, corresponding to a high tempe-
rature system (for example, radiators).
2.4.2 Floor screed drying (Circuits 1 & 2) (Optional function)
The new air to water heat pump has an special optional function used exclusively for the process of drying of newly applied
screed on oor heating system. This process is based on EN-1264 part 4.
When the user activates the oor screed drying function, the water set point follows a predetermined schedule:
1 Water set-point is kept constant at 25ºC for 3
days.
2 Water set-point is set to the maximum heating
supply temperature (but always limited to ≤
55ºC) for 4 days.
3 After 7 days started the oor screed drying, the
water outlet temperature will return at the assig-
ned water temperature setting, depending on
the water rule selected.
0 1 2 3 4 5 6 7 8 9 10
25
30
35
40
11
Water outlet
temperature
(ºC)
Days
2.4.3 Test run operation from LCD user’s interface
In addition to the usual test run by outdoor unit, there is available a test run function from the LCD user’s interface of the
indoor unit to check the system performance.
N O T E
For more information, please refer to YUTAKI S80 indoor unit Installation and operation manual.