User manual HONEYWELL AQS 71-KAM DATASHEET

[. . . ] The relay output can be used for CO2 limit monitoring or plant/system ON/OFF control. If used as a transmitter, it converts the actual measured values of the CO2 concentration and temperature into standard output signals 0(2) to 10 Vdc or 0(4). . . 20 mA depending on the adjusted measurement ranges. Directly connected to the analog inputs of Honeywell DDC systems it allows the required flexibility for a wide range of applications and the use of different demand controlled ventilation strategies to match exactly the requirements of the control system. If used as a controller the actual measured values are compared with the programmed setpoints. [. . . ] Depending on the deviation the control output values are calculated and converted into two separate 0(2). . . 10Vdc or 0(4). . . 20mA outputs which can drive directly final control devices. In this application the AQS-USP22 software package can be used to configure the available two analog outputs for temperature and ventilation control, and to assign for each output a number of functions to provide different ventilation control strategies. All sensor measurements can be addressed to these functions and mixed together by this software to form two independent and intelligent P+I controllers. The relay output contact CM-NO is closed, if the CO2 level exceeds the factory adjusted limit of 1000ppm and the contact CM-NC is closed, if the CO2 level is equal or below 900ppm. These parameters are programmable within the specified measurement range. APPLICATION ADVICE For rooms where are the occupants the source of the main air pollution, a CO2 concentration of max. 1200ppm should not be exceeded. MOUNTING The AQS51-KAM and AQS61-KAM sensor/controllers are supplied with the sensor printed circuit board already mounted into the aspiration box. Mount the unit in the return or outside air duct in a position far away from external heat sources and where it is easy accessible for service and maintenance purposes. Since there might be a substantial pressure difference between the duct and ambient air, it is indispensable that the sealings of the cable entry bushings, the cable feed through, the box cover and the duct entrance are absolutely tight to avoid ambient air from suction into the aspiration box. The duct entrance may need additional sealing paste in order to prevent leakage. Closed Open 1 2 3 6 7 8 10 4 5 9 1 2 3 4 5 Sampling probe Sealing gasket Duct flow direction label 2 washers BRB 5. 3x10x1 2 screws RXS 4. 8x16 6 7 8 9 10 O-ring PG9 cable entry bushing PG7 cable entry bushing PCB (factory supplied mounted in the box) Snap-in lid Fig. 2 Parts list and mounting of the aspiration box to the sampling probe EN0B-1023 GE02R0500 4 AQS51/61-KAM COMBINED CO2-/TEMPERATURE DUCT SENSOR/CONTROLLER 1 9. Select the required output ranges by setting the three coding jumpers accordingly to Table 1. To change between voltage and current output mode the hardware jumpers have to be set in accordance. There is one jumper for AN1 and one for AN2, so that one output can be a voltage output and the other a current output. Both voltage output and current output can be 0. . . 100% (0. . . 10 Vdc or 0. . . 20 mA) or 20. . . 100% (2. . . 10 Vdc or 4. . . 20 mA) The same percentage are used for both outputs, see Table 1. Wiring should be done only according to the actual job wiring diagrams or above wiring list. All wiring must conform to applicable codes, ordinances and regulations. Therefore handle the unit carefully and avoid electrostatic discharge. Do not connect the power supply unless all other connections and settings are correctly done. The AQS51/61 signal ground (M) is not galvanically separated from the power supply. If the analog output signals are connected to controllers or DDC system, the same ground potential has to be used or install separate transformers for sensor and controller/DDC system. Electrical Data 24Vac/dc+ 24Vac/dc0. . . 10Vdc, 0. . . 20mA, 2. . . 10Vdc, 4. . . 20mA 0. . . 10Vdc, 0. . . 20mA, 2. . . 10Vdc, 4. . . 20mA Remarks Internal rectifying diode (see Note 1!) According to OUT, AN1 jumper positions According to OUT, AN2 jumper positions Protected by PTC resistor Potential free contact relay 1mA/5V up to 1A/50Vac/24Vdc Triggered by register OUT3 EN0B-1023 GE02R0500 6 AQS51/61-KAM COMBINED CO2-/TEMPERATURE DUCT SENSOR/CONTROLLER START UP After connected to a 24Vac power supply, the unit is ready for operation. [. . . ] Electrical Data 24Vac/dc+ 24Vac/dc0. . . 10Vdc, 0. . . 20mA, 2. . . 10Vdc, 4. . . 20mA 0. . . 10Vdc, 0. . . 20mA, 2. . . 10Vdc, 4. . . 20mA Remarks Internal rectifying diode (see Note 1!) According to OUT, AN1 jumper positions According to OUT, AN2 jumper positions Protected by PTC resistor Potential free contact relay 1mA/5V up to 1A/50Vac/24Vdc Triggered by register OUT3 EN0B-1023 GE02R0500 6 AQS51/61-KAM COMBINED CO2-/TEMPERATURE DUCT SENSOR/CONTROLLER START UP After connected to a 24Vac power supply, the unit is ready for operation. If the relay output is not used for any control purpose, its trigger point can be programmed for other tasks, e. indication by the red LED of dangerous gas level has been reached. yellow red 7 EN0B-1023 GE02R0700 AQS51/61-KAM COMBINED CO2-/TEMPERATURE DUCT SENSOR/CONTROLLER SELF DIAGNOSTICS The system contains complete self diagnostics, which is executed automatically every time the power is turned on. If the error message equals 8, it will not be cleared until a new self diagnostic procedure is activated after a power up. [. . . ]