6/10
Siemens Building Technologies
Fan coil controller for wall mounting ACR12
CE1N3573E
HVAC Products
17.08.2001
Switch designation
S1
S2
S3
S4 S5 S6 S7 S8 S9 S10
S11 S12
Operating mode 1 (Comfort* <-> Standby**)
Operating mode 2 (Comfort* <-> Economy**)
Operating mode 3 (Economy* <-> Standby**)
Operating mode 4 not used
on
on
off
off
on
off
off
on
Direction of operation of input DU1 normally closed
(Change of operating mode)
normally open
on
off
Dwell time of the fan speeds:
2 minutes
1 minute
on
off
P-band heating 2 K
P-band heating 4 K
on
off
P-band cooling 2 K
P-band cooling 4 K
on
off
PI algorithm
P algorithm
on
off
Mode 1 Ventilation in the neutral zone OFF
Mode 2 Ventilation in the neutral zone ON
on
off
2-pipe application
4-pipe application
on
off
2-pipe application cooling / Valve + electric heater
2-pipe application cooling /Valve
on
off
Factory setting c/o hysteresis 17 °C – 27 °C
Fan "Off“ at c/o < 35 °C, c/o–hysteresis 17 °C – 39 °C
on
off
Indication °C
Indication °F
on
off
The factory settings are underlined and in bold print in the above table (
on
)
* Change of the operating mode can be made with the button on the controller,
by means of a window contact, occupancy detector or otherwise (terminals
DU1-GND). Input DU1-GND has a higher priority than the button.
** 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
B2
DU1
M
Y1
Y10
Q14*
N
N
N
L
PE
Q1
Q3
Q2
3574A
0
9
3574A
10
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
GND
Measuring neutral for
control input
L, N
Operating voltage AC 230 V
PE
Earthing
Q14
Control output for electric heater
Y10
4-pipe application / control output for valve (cooling)
/ AC 230 V
M
Measuring neutral for
sensor
B2
Changeover- or return air sensor QAH11
Y1
4-pipe application / control output for valve (heating)
/ AC 230 V
2-pipe application / control output for valve (heating or cooling)
/ AC 230 V
Q1
Control output for fan speed 1
/ AC 230 V
Q2
Control output for fan speed 2
/ AC 230 V
Q3
Control output for fan speed 3
/ AC 230 V
Terminal assignment