AIAS ROOM CONTROLLER ORIGINAL INSTALLATION AND OPERATION INSTRUCTION
/ 26 | AIAS Room controller - installation and operation instruction General description Control modes AIAS-RC Room Controllers can handle everything from heating, cooling and ventilation to humidity, CO2 monitoring and control. They can be used either as stand-alone units or integrated into a system with communication.
AIAS Room controller - installation and operation instruction | 3 / 26 Technical data Supply voltage Internal consumption Ambient temperature Ambient humidity Storage temperature Terminal blocks Protection class Material casing Colour Cover Bottom plate Weight Dimensions Models without setpoint knob Models with setpoint knob Communication Type 18...30 V AC, 50...60 Hz 2.5 VA 0...50°C Max 90 % RH -20...+70°C Lift type for cable cross-section 2.
/ 26 | AIAS Room controller - installation and operation instruction Accessories External temperature sensors Occupancy detector Relay module for -F-models Change-over Condensation detector CO2 transmitter Troubleshooting TG-R5/PT1000,TG-UH/ PT1000,TG-A1/PT1000 IR24-P RB3 TG-A1/PT1000 KG-A/1 CO2RT Using labels On the back of the electronics cassette, there is a set of labels which makes it easier to install large numbers of controllers.
AIAS Room controller - installation and operation instruction | 5 / 26 Wiring All units that share the same transformer and communication loop must use the same transformer-pole for G (terminal 10) and G0 (terminal 11). On the communication loop the A-terminal (terminal 42) should only be connected to another A-terminal and the B-terminal (terminal 43) to another B-terminal. Otherwise, the communication will not work. The communication cable must be a screened twisted pair cable.
/ 26 | Terminal 10 11 12-14 20 21 AIAS Room controller - installation and operation instruction Designation G G0 GDO G0 Operation Supply voltage 24 V AC Supply voltage 0 V No function. 24 V AC out common for DO. Internally connected to terminal 10, G. 0 V common for UO. Internally connected to terminal 11, G0. Output for VAV or EC-fan. For forced ventilation. 24 V AC output, max. 2.0 A. 24 V actuator is connected between terminal 22 and terminal 20, GDO. 22 UO3 Alternatively For 0...
AIAS Room controller - installation and operation instruction | 7 / 26 Different control modes The controllers can be configured for different control modes/control sequences. Depending on which control mode is active, one, both or all three of the universal outputs, UO1, UO2 and UO3, are used. See table below for a summary.
/ 26 | AIAS Room controller - installation and operation instruction Heating/Cooling with VAV-control and forced supply air function Like control mode Heating/Cooling but the cooling output is controlling a supply air damper (sub-tempered supply air). When the ventilation is forced, the cooling output is set to full cooling (full supply air volume), regardless of what the controller output signal is.
AIAS Room controller - installation and operation instruction | 9 / 26 Heating/Cooling/VAV This control mode offers the possibility to control three analogue outputs: heating, cooling and VAV.
/ 26 | AIAS Room controller - installation and operation instruction To avoid Y2 and Y3 opening and closing frequently during switch-over, a saddle point is implemented. Y2 will output 0...10 V (linear) when the controller output is 0...48 % and Y3 will output 0...10 V (linear) when the controller output is 52...100 %. In the saddle point, the outputs will always be 100 % for Y2 and 0 % for Y3. As an addition to the function described above, it is possible to connect a CO2 sensor to controller.
AIAS Room controller - installation and operation instruction | 11 / 26 At forced ventilation, Y3 will open fully as before, and Y2 will control depending on temperature. However, Y2 will not give any output unless the controller output is above 52 %. Heating/heating or cooling via change-over For models offering fan functionality, a function for control of a heating battery on UO1 in sequence with change-over on UO2 is available.
/ 26 | AIAS Room controller - installation and operation instruction CO2 sensor and VAV control RC can be set to all of the above control modes. When RC are set to VAV control, the control mode is combined with a CO2 control function. In control mode Heating/Cooling with VAV-control, the CO2 concentration in the room will make the VAV damper, cooling output UO2, open. The function is linear and the damper works between the configured min.
AIAS Room controller - installation and operation instruction | 13 / 26 Many damper actuators have a working range of 2...10 V. This means that to set a minimum limitation of 20 %, the min. limitation in the RC will have to be set to 36 % . Forced ventilation depending on the heating/cooling output At 100 % heating or cooling output, forced ventilation can be activated.
/ 26 | AIAS Room controller - installation and operation instruction Presence detection depending on the CO2 concentration This function is not active when the controller is configured for Heating/Cooling with VAV¬control. When the CO2 concentration exceeds the set value for activation of presence, UO3 will switch to forced ventilation if the presence operating mode is set to Bypass. It will stay there until the concentration drops below the set value (FS=800ppm) minus the hysteresis (FS=160ppm).
AIAS Room controller - installation and operation instruction | 15 / 26 OPERATING MODES Different operating modes The controllers have the following operating modes: • 0 = Off • 1 = Unoccupied • 2 = Stand-by • 3 = Occupied (FS) • 4 = Bypass Off Occupied Operating mode Off means that the controller is not heating or cooling, and the fans are stopped. However, the temperature must not drop below the set minimum temperature (FS=8°C).
/ 26 | AIAS Room controller - installation and operation instruction Activation of the different operating modes The preset operating mode is configured to Occupied by default. This is configured in the parameter menu in the display, parameter 45 The operating mode is changed at the following events: • When the Occupancy button is pressed (if the controller has an Occupancy button). • Activation/deactivation of an occupancy detector on the digital input.
AIAS Room controller - installation and operation instruction | 17 / 26 Central control Central control of the operating mode is also possible.
/ 26 | AIAS Room controller - installation and operation instruction Setpoint calculation Basic setpoint There are two basic setpoints, one basic heating setpoint (FS=22°C) and one basic cooling setpoint (FS=24°C). Units without display have DIP switches to change the setpoints. The basic cooling setpoint is automatically changed at the same time. Therefore, the difference between the basic heating setpoint and the basic cooling setpoint is always the same. The basic setpoint is set in the display.
AIAS Room controller - installation and operation instruction Actuators Regio can be used with four types of actuators: • Analogue 0...10 V actuators • Thermal actuators • 3-point actuators (Increase/Decrease actuators) • On/Off spring return actuators On units without display, it is possible to select if thermal or analogue actuators will be used via the DIP switches. For other actuators and Regio models, the actuator type is set via Regio tool© or, for controllers with a display, in the parameter menu.
/ 26 | AIAS Room controller - installation and operation instruction SPECIAL FUNCTIONS Condensation detector Change-over function Special input CI Change-over is a function for installations with 2-pipe systems or for pure VAV temperature control. It makes it possible to use the same pipe for both heating and cooling, depending on requirements during for example the summer (cooling output) and the winter (heating output).
AIAS Room controller - installation and operation instruction | 21 / 26 Display handling • Occupancy button The controller has a display. • INCREASE button Also an Occupancy button is available, as well as an INCREASE button and a DECREASE button to increase and decrease the setpoint.
/ 26 | AIAS Room controller - installation and operation instruction Parameters The following parameters can be changed in the parameter menu (FS = Factory setting): Parameter Description number 1 Basic heating setpoint 2 Basic cooling setpoint Neutral zone at standby, 3 Heating setpoint = Basic sp. heating-3 by default Cooling setpoint = Basic sp.
AIAS Room controller - installation and operation instruction Parameter Description number State connected function on UO2: 0= None 1= None 2=Thermal actuator cool 21 3= None 4=Cooling actuator 0...10 V 5= None 6=On/off actuator cool State connected function on UO3: 0= None 1=Forced vent.
/ 26 | AIAS Room controller - installation and operation instruction Parameter Description number Select operating mode for central control: 0=Off 1=Unoccupied 47 2=Stand-by 3=Occupied 5=No central control Min flow at cool output when control mode Heating/Cooling with VAV- control is selected 48 Min flow at Y3 output when control mode Heating/Cooling/VAV is selected 49 Max flow on Y3 output when control mode Heating/Cooling/VAV is selected and in heating mode Configuration of fan control: 0=No control
AIAS Room controller - installation and operation instruction Parameter Description number 72 Answer delay in Modbus (t3.5), in ms. Should be 3,5 times a character, i.e. at least 5 ms. Selection of heating output function (NO/NC): 73 0=NC (Normally closed) 1=NO (Normally opened) Setpoint display at setpoint adjustment.: 0=The offset is shown in the display 74 1=The active setpoint + offset is shown in the display.
/ 26 | AIAS Room controller - installation and operation instruction MEMORY FUNCTION ON POWER FAILURE On power failure, settings and configurations are preserved in the controller in a so-called non-volatile memory (EEPROM). All changes made to the settings and configuration is saved in the memory, which means that the latest values are always stored. Measured values, as well as other variables that change often, are not stored.
