User manual HONEYWELL C7110A1010 DATASHEET

[. . . ] Registered Trademark Copyright © 2009 Honeywell Inc. · All rights reserved EN0B-0644GE51 R1109A C7110A1010 ROOM AIR QUALITY SENSOR FUNCTION The device contains a heated tin dioxide semiconductor sensor, the electrical conductivity of which varies in proportion to the concentration of reducing agents in the ambient air. This leads to a voltage at the measuring element which is amplified to an output voltage of 0 to 10 Vdc. The following particles and gases can be detected: cigarette smoke, hydrogen, carbon monoxide, ethanol, ammonia, etc. [. . . ] The maximum length of wire from a device to a wall module is 1000 ft (305 m). Twisted pair wire is recommended for wire runs longer than 100 ft (30. 5 m). Keep wiring at least one ft (305 mm) away from large inductive loads such as motors, line starters, lighting ballast, and large power distribution panels. Run wall module wiring separately from 50 Vac or greater power wiring. 1 PRESS Fig. a) Mount the sensor onto the wall outlet box, or b) bore wall holes as specified in Fig. 3 and mount the wall module with appropriate screws. CAUTION Low Voltage Equipment. The 24 Vac power source for this product must be a safety isolating transformer. A transformer that is CE certified and meets the Low Voltage Device (LVD) requirements must be used in Europe for all installations of this product. EN0B-0644GE51 R1109A 2 C7110A1010 ROOM AIR QUALITY SENSOR 1 100 86 OUTPUT VOLTAGE 60 Y 24V 24V~ OFFSET TAB TO RELEASE PCB 68 97 2 104 99 30 Fig. Dimensions and mounting holes (mm) IMPORTANT Screw-type terminal blocks are designed to accept no more than one 16 AWG (1. 5 mm2) conductor. After re-inserting the printed circuit board and the perforated plate, connect the wires to the terminal block as follows: a) Strip 3/16 in. (5 mm) of insulation from the conductor. b) Insert the wire in the required terminal location (see Fig. 5) and tighten the screw to complete the termination. Adjust the trimming potentiometer (see section "Adjusting the Offset Signal"). 4 and make sure that the tab on the underside engages. When the air quality deteriorates, the voltage of the output signal will rise. Adjusting the Offset Signal After mounting the device, the output signal should be adjusted in accordance with expected ambient conditions and individual preferences. The output signal is adjusted using the trimming potentiometer located on the sensor board (see Fig. 5). STATUS LED OUTPUT VOLTAGE SENSOR (Do not touch!) OFFSET Y 24V 24V~ Y 24V 24V~ TRIMMING POTENTIOMETER OFFSET Fig. Wiring Connection and Trimming Potentiometer The offset of the output signal is increased or lowered by means of this potentiometer. 5) indicates the corresponding signal strength: Turning the trimming potentiometer clockwise (CW) decreases the output signal (minimum brightness is reached at an output signal of 1. 5 V) Turning the trimming potentiometer counterclockwise (CCW) increases the output signal (maximum brightness is reached at an output signal of 9 V). 3 EN0B-0644GE51 R1109A C7110A1010 ROOM AIR QUALITY SENSOR The sensor cannot distinguish pleasant from unpleasant smells. [. . . ] Correct an excessively high or excessively low voltage level using the trimming potentiometer: The trimming potentiometer should be turned clockwise (CW) until the yellow status LED is almost extinguished. The output signal will then amount to approx. NOTE: When first operating the device or after the device has been powered down for more than 4 weeks (e. g. , during storage), the output signal may vary during the first 48 hours of operation. In this case, you should verify the output signal after 48 hours of operation. OUTPUT VOLTAGE (V) 10 5 ROOM UNOCC. , SENSOR IDLING Fig. [. . . ]