Start-Up Benefits; Start-Up By Pressing The Run/Stop Button Of Lcd User's Interface; Floor Screed Drying (Circuits 1 & 2) (Optional Function); Test Run Operation From Lcd User's Interface - Hitachi YUTAKI S80 Series Technical Catalogue

2. Features and benefits

2.4 Start-up benefits

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 floor heating system. This process is based on EN-1264 part 4.
When the user activates the floor screed drying function, the water set point follows a predetermined schedule:
Water outlet
temperature
(ºC)
40
35
30
25
0 1 2 3 4

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.
40
TCGB0075 rev.0 - 11/2012
5 6 7 8 9 10 11
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 floor screed drying, the
water outlet temperature will return at the assig-
ned water temperature setting, depending on
the water rule selected.
Days