Honeywell C7110A User manual

EN0B-0295GE51 R0101
C7110A
ROOM AIR QUALITY SENSOR
SPECIFICATION DATA & INSTALLATION INSTRUCTIONS
GENERAL
The C7110A Room Air Quality Sensor is suitable for
measuring air quality in rooms, offices, and production bays.
This mixed gas sensor can be used to control ventilation
plants. It detects unpleasant odors, tobacco smoke, and
vapors emitted by such materials as furniture, carpets, paint,
glue, etc. As proven in practice, this device detects those
substances typically present in air having a poor quality,
some of which may otherwise go undetected by room
occupants, themselves. This sensor has proven itself in
numerous applications over many years.
Models
Order Number Description Output
C7110A1005 Room Air Quality Sensor 0...10Vdc
FEATURES
•Measurement of a variety of air quality factors
•Output signal: 0...10 Vdc
•Adjustable output offset
•Easy installation and wiring connection
SPECIFICATION
Supply voltage 15...24 Vdc / 24 Vac
Power consumption < 1 W
Output signal 0...10 Vdc (increases as air
quality worsens)
Weight /Dimensions approx. 125 g / see page 3
Electrical connection Screw terminal block for
conductors up to 1.5 mm²
Air Quality Sensor
Sensitivity/Linearity see Fig. 1 on page 2
Dynamic behavior see Fig. 6 on page 4
Ambient Limits
Transport and −10...+70 °C (+14...+158 °F)
storage temperature
Humidity 5...95%rh, non-condensing
Safety
Protection class II as per EN60730-1
Protection standard IP30 as per EN60529
Flame retardant V0 as per UL94
Plastic ABS
FUNCTION
The electrical conductivity of a heated tin-dioxide semi-
conductor sensor varies in proportion to the number of mole-
cules of the reducing agents. This leads to a voltage at the
measuring element which is amplified to an output voltage of
0V to 10Vdc.
The following particles and gases can be detected: cigarette
smoke, hydrogen, carbon monoxide, ethanol, ammonia, etc.
In contrast to CO2 sensors, which selectively measure the
concentration of only one type of gas, a mixed gas sensor is a
broadband detector, i.e. the sensor signal does not indicate
the type of gas or its concentration in ppm (parts per million).
The complex and constantly changing composition of room
air makes it necessary to perform broadband air quality
measurement.

C7110A ROOM AIR QUALITY SENSOR
EN0B-0295GE51 R1200 2
Fig. 1 Sensor sensitivity with different gases
2-11/16
(68)
1
1 Mounting holes
1
1-3/16
(30)
3-7/8
(97)
3-15/16
(99)
3-7/16
(86)
2-3/8
(60)
4
(100)
4-1/8
(104)
Fig. 2 Dimensions and mounting holes in inches (mm)

C7110A ROOM AIR QUALITY SENSOR
EN0B-0295GE51 R1200
3
INSTALLATION
All wiring must comply with local electrical codes and
ordinances or as specified on installation wiring diagrams.
Wall module wiring can be sized from 16 to 22 AWG (1.5 to
0.34 mm2), depending on the application. 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).
NOTE: Maintain a mounting clearance of approx. 4 in.
(10 cm) to the right-hand side of the module in order
to allow free airflow to the air quality sensor.
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
2
LIFT
PRESS
Fig. 3 Cover disassembly Fig. 4 Wiring Connection and Trimming Potentiometer
Mounting Procedure
1. The cover of the air quality sensor is fixed by a tab on
the underside of the unit; to disassemble the cover
and the subbase, see Fig. 3.
2. a) Mount the sensor onto the wall outlet box,
or
b) bore wall holes as specified in Fig. 2 and mount
the wall module with appropriate screws.
IMPORTANT
Screw-type terminal blocks are designed to accept
no more than one 16 AWG (1.5 mm2) conductor.
3. 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. 4) and tighten the screw to complete the
termination.
4. Remount the cover as shown in Fig. 5 and make sure
that the tab on the underside engages.
1
2
Fig. 5 Cover assembly

C7110A ROOM AIR QUALITY SENSOR
Home and Building Control Products
Honeywell AG
Böblinger Straβe 17
D-71101 Schönaich
Phone: [phone]
Fax: [phone]
http://europe.hbc.honeywell.com
Subject to change without notice. Printed in Germany. Manufacturing location certified to
EN0B-0295GE51 R0101
DIN
EN ISO 9001
OFFSET SETTING
The setpoint for acceptable air quality is set approximately
during installation. The exact setting must be done by the
room user in accordance with his personal perception.
To do this, the output signal can be adjusted using a trimming
potentiometer located on the sensor board which increases or
reduces the offset of the output signal.
Fig. 6 shows the dynamic characteristics of the air quality
sensor, monitored during test measurements in a sample
room. This voltage diagram as a function of different
occupancy conditions is only an example and must be proven
for other ambient conditions.
room unoccupied, air quality sensor idling room occupied by 2 persons room occupied by 3 persons room occupied by 3 persons all 3 persons have vacated room window fan switched on room occupied by 3 persons, one of whom is smoking
Time
(minutes
)
0 50 100
room unoccupied, air quality sensor idling
Fig. 6 Dynamic behavior of Room Air Quality Sensor
LED - Display
The sensor has one red LED located on the sensor board.
The LED indicates the device's operating status:
—LED brightness is proportional to 0..10Volts output for
reference.
Dynamic behavior at different
occupancy conditions.
room volume: 33.6 m3
occupancy: 1...3 persons