User manual HONEYWELL AQS 71-KAM DATASHEET

[. . . ] 1 Dimensions in mm EN0B-1023 GE02R0700 AQS51/61-KAM COMBINED CO2-/TEMPERATURE DUCT SENSOR/CONTROLLER OPERATION General Each of these devices can be used as transmitter for measurement of CO2 concentration and temperature or as a very flexible controller for proportional and integral control of mixed air dampers or variable speed controlled fans in stand alone applications. 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. [. . . ] 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. The default settings are for 0. . . 10Vdc outputs as indicated by the darker jumper positions in Fig. The outputs have to be configured before the unit is connected to the power supply. Do not change jumper positions when power is on. Connect the cable wires to the terminal block as listed in Table 2. 2 1 2 Hole with 25mm Temperature sensor with 150mm cable Fig. 3 Mounting of AQS51/61-KAM onto the duct Mounting Instructions 1. Situations can occur where different transformers must be used. NOTE2: AQS51/61 can supply both a voltage or a current output for OUT1/OUT2. 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. Electric discharge may damage the sensor electronics. 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 error message equals 8, it will not be cleared until a new self diagnostic procedure is activated after a power up. The other codes are reset when the causes have vanished. For AQS51/61-KAM the tests comprise checking internal voltage regulators and output values. In addition, constantly during operation, the sensor probes are checked against failure by checking the valid dynamic measurement ranges. Error Code and Actions Error Code 4 Suggested Action Indicate problems with the power supply. [. . . ]