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Switch designation
Operating mode 1
(Comfort*
Operating mode 2
(Comfort*
Operating mode 3
(Economy* <-> Standby**)
Operating mode 4 not used
Direction of operation of input DU1 normally closed
(Change of operating mode)
Dwell time of the fan speeds:
P-band heating 2 K
P-band heating 4 K
P-band cooling 2 K
P-band cooling 4 K
PI algorithm
P algorithm
Mode 1 Ventilation in the neutral zone OFF
Mode 2 Ventilation in the neutral zone ON
2-pipe application
4-pipe application
2-pipe application cooling / Valve + electric heater
2-pipe application cooling /Valve
Factory setting c/o hysteresis 17 °C – 27 °C
Fan "Off" at c/o < 35 °C, c/o–hysteresis 17 °C – 39 °C
Indication °C
Indication °F
Terminal assignment
6/10
Siemens Building Technologies
HVAC Products
S1
<-> Standby**)
on
<-> Economy**)
on
off
off
normally open
2 minutes
1 minute
The factory settings are underlined and in bold print in the above table (on)
* Change of the operating mode can be made with the
by means of a window contact, occupancy detector or otherwise (terminals
DU1-GND). Input DU1-GND has a higher priority than the
** In case the controller is in operating mode marked **, the setpoint shift of ± 6 K is
not active. If any operation is carried out on the front of the controller, the mode
changes to * and the setpoint shift of ± 6 K is active again.
GND
DU1
N
N
ACR12.340/ALG and ACR12.341/ALG // *ACR12.320/ALG and *ACR12.321/ALG
DU1
Operation mode control input (DIL: S1&S2), max. AC 25 V
Measuring neutral for
GND
L, N
Operating voltage AC 230 V
PE
Earthing
Q14
Control output for electric heater
Y10
4-pipe application / control output for valve (cooling)
Measuring neutral for
M
B2
Changeover- or return air sensor QAH11
Y1
4-pipe application / control output for valve (heating)
2-pipe application / control output for valve (heating or cooling)
Q1
Control output for fan speed 1
Q2
Control output for fan speed 2
Q3
Control output for fan speed 3
Fan coil controller for wall mounting ACR12
S2
S3
S4 S5 S6 S7 S8 S9 S10
on
off
off
on
on
off
on
off
on
off
on
off
Y10
N
PE
L
Q14*
control input
sensor
S11
on
off
on
off
on
off
on
off
on
off
button on the controller,
button.
M
B2
Y1
Q1
Q2
/ AC 230 V
/ AC 230 V
/ AC 230 V
/ AC 230 V
/ AC 230 V
/ AC 230 V
S12
on
off
Q3
CE1N3573E
17.08.2001
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