Fujitsu UTW-SCBYA, Installation And Operating Manual

Line

Function

Setting range or display

Setting 

increment

Basic setting

Holidays, heating circuit 1

641

U

Preselection

Period 1 to 8

Period 1

642

U

Start (Day / Month)

01.01... 31.12

1

643

U

End (Day / Month)

01.01... 31.12

1

648

U

Operating level (during the holidays)

Frost protection, Reduced

Frost 

protection

Heating, circuit 1

710

U

Comfort heating setpoint

from reduced setpoint to 35°C

0,5 °C

20 °C

712

U

Reduced setpoint

from frost protection setpoint… 

to comfort setpoint

0,5 °C

18 °C

714

U

Frost protection setpoint

from 4°C… 

to reduced setpoint

0,5 °C

8 °C

716

S

Comfort setpoint max

20 °C... 35 °C

1 °C

28 °C

720

I

Heating curve slope (See 

figure 12

).

0,1... 4

0,02

0,5

721

I

Heating curve displacement

-4,5 °C... 4,5 °C

0,5 °C

0

726

I

Heating curve adaption (

see § 3.2.3

)

Off, On

Off

730

I

Summer / Winter heating limits

8 °C... 30 °C

0,5 °C

18 °C

When the average of the outdoor temperatures over the past 24 hours reaches 18°C, the regulator switches off the 

heating (as an economy measure).
During summer mode, the display shows "Eco". This function is only active in automatic mode.

732

S

24-hour heating limit

-10 °C... 10 °C

1 °C

-3 °C

This function enables you partially to offset the automatic summer / winter switchover during the intermediate seasons.
Increasing the value delays the switchover to summer regime.
Decreasing the value advances the switchover to summer regime.
This function is only active in automatic mode.

740

S

Flow temp setpoint min (for fan convectors)

8... 95 °C

1 °C

8 °C

741

S

Flow temp setpoint max

8... 95 °C

1 °C

55 °C

Floor heating system = 50 °C / Higher temperature radiator = 65 °C

750

S

Room influence

1%... 100%

1%

20%

If the installation is fitted with a room thermostat :
This function enables you to choose the ambient temperature's influence on the setting.
If no value is entered, the setting is made based on the temperature control.
If the parameter is set at 100%, the setting is only based on the ambient temperature.

790

S

Optimum start control max 

(Early start to switch to the comfort setting.).

0... 360 min

10 min

120 min

791

S

Optimum stop control max 

(Early stop to switch from the comfort setting to the 

reduced setting.).

0... 360 min

10 min

120 min

800

S

Reduced setp increase start

-30... 10 °C

1 °C

--

801

S

Reduced setp increase end

-30... 10 °C

1 °C

-5 °C

830

S

Mixer valve boost

0... 50 °C

1 °C

0

834

S

Actuator running time

30... 873 s

1 s

240 s

Installation and operating manual "1395 - EN"

Control Box

- 18 -