Fujitsu UTW-C75XA Operating instructions

Brand: Fujitsu

Model: UTW-C75XA

Type: Operating instructions

02.06.2006 74 319 0450 0 c En

QAA75…

QAA78…

AVS37…

74 319 0450 0

B2358X01

Operating Instructions

Has the right operating mode been selected?

Press the button to switch be-

tween the different operating

modes. The selected operating

mode is indicated by a bar below

the respective symbol.

Automatic mode

Automatic mode controls the room temperature ac-

cording to the time program.

Continuous operation or

Continuous operation maintains the room temperature

at the selected operating level.

Heating to the Comfort setpoint

Heating to the Reduced setpoint

Protection

In Protection mode, the heating system is off, but

protected against frost (frost protection temperature).

Cooling mode

Cooling mode controls the room tempera-

ture in accordance with the selected

operating mode. (Optional)

DHW mode

DHW is heated according to the

selected mode.

Are you too warm or too cold?

Settings:

1. Turn the setting knob to increase or

decrease the Comfort setpoint .

Confirm the setting with the

operating mode button.

2. For the reduced setpoint , press

OK, select operating page “Heating circuit“ and ad-

just the “Reduced setpoint”.

Tip: Each time you make a readjustment, wait at least 2

hours, allowing the room temperature to adapt.

Will you leave the rooms for some time?

If you do not use the rooms for a longer

period of time, you can press the

occupancy button to reduce the room

temperature, thus saving heating energy.

When the rooms are occupied again, press again the

occupancy button to resume heating operation.

Heating to the Comfort setpoint

Heating to the Reduced setpoint

The occupancy button is only active in automatic

mode

The current selection is active until the next swit-

ching action according to the heating program oc-

curs

Do you want to display information?

1. The Info button can be used to retrieve

information.

2. In exceptional cases, the display shows

one of the following symbols:

Error message

If this symbol appears, a plant fault has occurred. In

that case, press the Info button to obtain more informa-

tion.

Maintenance

If this symbol appears, a maintenance message is

delivered, or the plant has changed to some special

mode. In that case, press the Info button to obtain

more information.

What do the following mean?

Heating to the Com-

fort setpoint

Info level activated

Heating to the Re-

duced setpoint

Setting level

activated

Heating to the frost

protection setpoint

Heating system

temporarily off

Process running –

please wait Holiday function

active

Change battery Reference to

heating circuit

Burner in operation

(only oil / gas burner)

Do you want to make settings?

Additional settings that are not directly accessible via

the user interface are made on the setting level. The

basic setting procedure is shown here. By pressing the

ESC button, you go back one step at a time.

Operating page Operating line

1 2 3 4 5

Setting value

6 7

XXXX.XX XX

The following settings are accessible:

Operating page Operating line

Time of day and date Hours / minutes

Month, day

Year

Operator unit Language

Time program Preselected period

1st phase on / off

2nd phase on / off

3rd phase on / off

Standard values

Holidays heating circuits

1,2,P

Start

End

Operating level

Heating circuits 1,2,P Comfort setpoint

Reduced setpoint

Frost protection setpoint

Heating curve slope

Summer/winter heating limit

DHW Nominal setpoint

Maintenance / service …

Note: Depending on the type of controller used, the table

may partly deviate from the operating lines displayed.

Is the DHW too hot or too cold?

Caution! If the DHW is too hot, there is a risk of scalding!

Setting:

Select operating page “DHW“ and set the “Nominal

setpoint“ to the required level.

Do you want to readjust the time or the date?

Note: Summer- and wintertime changeover is automatic!

Setting:

To ensure that your heating system operates properly,

the time of day must be correctly set. Select operating

page “Time of day and date“ and then the relevant

operating line.

Do you intend to go on holiday?

You can enter a holiday period. At the beginning of the

holiday period, the unit will switch to the selected

operating level and resume the selected operating

mode at the end of the holiday period.

The holiday function is only active in automatic

mode

Setting:

Select operating page “Holidays“ and set “Start“, “End“

and the “Operating level“ to be used during the holiday

period.

Do you want the text display in another language?

Setting:

Select operating page “Operator unit“ and then “Lan-

guage“ for the display.

Do you know the following energy savings tips?

During the day, do not allow the room temperature

to rise above 21 °C

Air rooms only briefly with the windows fully open

In unoccupied rooms, set the thermostatic radiator

valves to the frost protection position

Make certain that there are no curtains, furniture,

etc., in front of the radiators

Note: For more information, please refer to the documen-

tation of your heating system.

Fujitsu UTW-C75XA Operating instructions

Fujitsu UTW-C75XA Operating instructions

Fujitsu UTW-C75XA Operating instructions

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