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Operating Instructions
EN
CHAPTER 2
FUNCTIONS
m
ATTENTION
NOTE!
Three-Step Switch SU/SA
2.0 Functions
Three different setpoint settings can be issued via the three-step switch. Each step
(S1-S3) is freely adjustable via a separate potentiometer from (...see table below) Volts
(with a Phillips type screwdriver, Ø 3 mm).
The connection of a weekly timer (WSUP, WSUP-S, accessories) for switching from
3-step daytime mode to e.g. night mode is also possible. The night/reduction mode is
freely adjustable via an additional potentiometer (A1) from 0 to 10 V DC.
Only EC fans or frequency inverters, which provide at least 1.5 mA with 10 V power
supply (controller internal consumption), may be connected.
Total current = Internal consumption (controller) + fan load current
(load current depends on load of 0-10 V fan input)
All three potentiometers S1, S2 and S3 are set to left stop when delivered.
The potentiometers must be adjusted to local requirements.
ò Slide switch
ù Scale Step S1-S3
Potentiometers:
ò Step S1
ù Step S2
ä Step S3
ë "A1"
ö "S"
(Meas. point)
ü "A"
(Meas. point)
Å "GND" (Earth/Ground)
TIP: Voltage measurement:
The output voltage of the supply
air fan in the set operating mode
can be measured via GND and S.
2.1 Switching step adjustment range
The Three-Step Switch SU / SA has 4 potentiometers:
Designation
S1
S2
S3
A1
GND
S
A
ò
ù
ë
ä
ü
ö
ù
ò
Å
Scale Designation
Step 1 of supply air fan
Step 2 of supply air fan
Step 3 of supply air fan
Step for WSUP
or night mode
Earth/Ground
Voltage Slide switch
Voltage External command Measurem. point
3
Fig.1
Potentiometer
adjustment,
ò to ë
RJ12
Control line
GND / 1 2 3
Bridge to terminal 2/3
factory setting,
see SS-1022)
Adjust. range
0 to 10.0 V
0 to 10.0 V
0 to 10.0 V
0 to 10.0 V
-
Measurem. point
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