3
Unit construction
3.1 Housing
2
1
4
3
5
6
Fig. 1: Front view of the controller
No.
Element
See
1
Operating mode button
(below the front panel)
2
Buttons
r
, SET, ESC,
s
3
Display
4
Front panel
5
Terminal cover
1)
6
Fastening screw for the
terminal cover
1)
You can find the description of the connection
terminals under the terminal cover here.
3.2 Display
Overview
error
v
1
2
3
4
1
2
4
3
Fig. 2: Overview over the areas of the display (all
elements visible)
1
System diagram
2
Setting menu
3
Pictograms for functions
4
Operating and setting values
The areas of the display are described below.
Symbols of the system diagram
The table below describes the symbols in the
system diagram (no. 1 in Fig. 2).
Symbol
Description
Pipe
External heat exchanger
Domestic hot water extraction point
Storage tank
3-way valve with flow direction
specified
Pump, switched on
Pump, switched off
Temperature sensor
V
Medium flow rate probe
9
Содержание EFS 25
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