Siemens ACR12.3 1 Series Manuals

CE1N3573E 17.08.2001 Siemens Building Technologies HVAC Products 3 573 ACR12.320/ALG ACR12.321/ALG ACR12.340/ALG ACR12.341/ALG Fan coil controller for wall mounting ACR12.3x0 ACR12.3x1 Pulse width modulated (PWM) valve outputs for thermic actuators, AC 230 V P or PI control behaviour selectable 3-speed fan control, automatic and manual Manual switching between heating and cooling operation, or automatic with changeover (C/O) sensor QAH11 Potential-free input for window contact or occupancy detector Inbuilt room temperature sensor Three operating modes: Comfort / Economy / Standby The status of the operating mode switch ( � � � � ) and changeover switch ( / ) are memorised on power failure. Use For controlling the room temperature in individual rooms and zones which are heated and cooled by fan coils. The controllers are suitable for 2- or 4-pipe applications with manual and automatic fan control. For control of • a 3-speed fan • two valve actuator with ACR12.34x/ALG for 4-pipe applications • a valve with an electric heater up to 2850 VA with ACR12.32x/ALG for 2-pipe applications