STIEBEL ELTRON FEK Operating And Installation Instructions

26_03_01_0106

270783

FEK

Control module
Operating and installation instructions

Index

1. Operating instructions 2

for users and contractors

1.1 Equipment description 2

1.2 Equipment overview 2

1.3 Important information 2

1.4 Operation 3

1.5 Settings 3

2. Installation instructions 12

for contractors

2.1 Standard delivery 12

2.2 General 12

2.3 Installation 12

2.4 Specification 13

2.5 Commissioning 13

2

1 Operating instructions for users and contractors

1.1 Equipment description

The FEK control module only works in
conjunction with the weather-compensated
WPMi control unit. It enables the convenient
entry and display of system parameters, e.g.
outside temperature, relative humidity and
heating circuit parameters (e.g. heating times
and required room temperature) for the
heating system from the user’s living room.
This allows the constant monitoring and
optimising of the heating system, both in
heating and in cooling mode.
In addition, hooking up a room temperature
enables the correction of the weather­compensated WPMi control unit.

1.2 Equipment overview

1.2.1 With closed control flap and standard
display

Relative humidity

Heating times

Time

Room temperature

Day

1.2.2 With the control flap open and with all
indicator elements on display

2

1

1 Programming indicator
2 + key
3 PRG key
4 - key
5 Reset

1.3 Important information

3 4

The control module must only be
installed and maintained by qualified
contractors.

5

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1 2

1 Away key
2 Operating mode key
3 Help key
4 Rotary selector for changing the set

room temperature ± 5 K

3 4

1.4 Operation

The operation is split over three control levels.
Control levels
and contractors alike. Control level 3 is only
designed for qualified contractors:

Control level 1

This enables the adjustment of operating
modes, such as standby mode, programmed

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operation, constant day or setback mode (for
this, see section 1.5.1).

Control level 2

This enables parameters, such as room
temperature, heating programs, etc. to be
adjusted (for this, see section 1.5.5).

1 and 2 are accessible to users

(control flap closed)

(control flap open)

3

Control level 3 (for contractors only)
This level is protected by a code and should
only be used by contractors. At this level,
heat pump and system-specific details are
determined (for this, see section 2.5).

1.5 Adjustments (control level 1)

With the flap closed, the display shows the
operating mode, time and day, as well as
the current room temperature and relative
humidity.

1.5.1 Operating mode key

Vital facts in brief

Settings

All adjustments follow the same pattern:

Opening the control flap toggles the FEK
to control level 2. The display shows the
parameter “room temp.”.
Pressing enables you to adjust the
parameter you want to change.
Press to change the value of the
parameter. You can change the currently
displayed value with
indicator is illuminated. Press again, the
indicator then extinguishes and the new
set value has been saved. You can modify
further values for this parameter by pressing

or , if the red indicator has not been
extinguished after saving.
The programming step can only be
terminated when the red indicator has
extinguished.

Terminating programming

You can terminate the programming process
after entering and saving the required
parameter changes by closing the control
flap. However, if you want to make further
changes, press one of the keys until the
display shows BACK, then press
will return you to the previous level. Closing
the control flap with illuminated indicator
returns the FEK into its original position. The
modified value will then not be saved.

or , when the red

. This

When connecting a FEK, only the operating
modes for the pre-selected heating circuit are
adopted by the WPMi.

You can select the required operating mode
by pressing this key several times with the
flap closed. The selected operating mode is
indicated by a symbol in the display. It becomes
effective if the setting was not changed for five
seconds.

Standby mode

Frost protection for the heating operation
is active. The standby symbol flashes, when
the heat pump manager is in standby
mode, and the operating mode cannot be
adjusted.
Application: During holidays.

Automatic mode
Heating according to time switch program.

Changeover between day temperature
and setback temperature. With this
operating mode, an additional symbol (sun
or moon) indicates in the display, whether
the heating circuit is currently in day or in
setback mode.

Constant day mode

The heating circuit is held at constant day
temperature.

Application: In low energy houses without

setback mode.

Constant setback mode

The heating circuit is held at constant
setback temperature.

Application: During weekends away.

4

1.5.2 Away key

This key activates the eco mode (away).
Press twice: The heating circuit switches to
setback mode for one hour. The selected
heating interruption is briefly displayed in
hours.
Press this key several times: the heating circuit
switches for the respective number of hours
to setback mode. If no key is then pressed for
approx. three seconds, the display returns to
the standard display and the active heating
interruption is displayed by the flashing moon
symbol.
You can scan the selected heating interruption
by pressing the “Away” key once at any time.
Pressing the operating mode key deactivates
the “Away” period and the moon symbol will
extinguish.

1.5.3 Help key

Pressing this key allows you to scan

sensor
temperatures of the heat pump or heat
pump system, such as outside temperature,
actual DHW temperature, actual return
temperature, actual room temperature and

the relative humidity.

After you press this key, the first display is
the outside temperature. Continuing to
press displays, in sequence, the actual DHW
temperature, the actual return temperature,
the maximum and minimum room
temperatures and the maximum and minimum
relative humidity. The standard display returns
after five seconds.
The MIN/MAX values for room temperature
and relative humidity are constantly updated
and stored.
If you hold down the key for four seconds, the
top of the display shows DELETE VALUES. All
MIN/MAX values will then be deleted.

Any fault in the heat pump causes an arrow
above the help key and the attention symbol
to flash. Pressing the help key displays that
fault. Three seconds later, the fault display
extinguishes and the standard display returns
again.

1.5.4 Room temperature

You can adjust the room temperature by
+/- 5K with the rotary selector. This set value
adjustment applies to the then current heating
time, not to the setback time.

Display (including all elements)

1 2 3

10

11

4

5

6

12 13 14915 16

7 8

1 Heating times for central
heating and DHW (black)
2 12-digit plain text display
3 Mixer mode
4 Heating mode
5

DHW mode
6 Cooling mode
7 Compressor runs
8 Booster in operation

Stage 1, 2 or 3
9 Fault message (flashing)
10 ‘BUS connection to the

WPMi established
11 WPMI in away mode
12 Standby mode
13 Automatic mode
14 Constant day mode
15 Constant setback mode
16 Day

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5