PROTRONIX NLII-CO2-R-5-A User Manual

Room sensor NLII-CO2 is used to continuously
monitor air quality inside buildings and then
control ventilation (HVAC) systems according to
current levels of internal air quality. The sensor
measures concentration of carbon dioxide (CO
air. It is suitable for schools, offices, classrooms,
shopping centers, homes, restaurants, fitness
centers, commercial buildings, etc.

measures CO
2

analog voltage/current output

2x output relay – 2x NO/C

sound signalization – alarm

two modes of relay switching

maintenance during operation not required

long life and stability
Type of sensor / Order code
NLII-CO2-R-5-A
NLII-CO2-2R-5-A
1)
It is possible to select the desired type of analog output by a jumper on the electronics board. Minimum achievable output value
corresponds to minimum value of the measuring range.
Description
The measuring of CO is based on the principle of infrared
2
radiation attenuation dependence on the CO
in the air (NDIR). Built-in auto-calibration function ensures
very good long term stability.
The sensor has built-in one analog output for the actual
concentration of CO . Relay trigger level can be set by SET
2
POINT rotary switch.
Relay switching is indicated simultaneously with a short (1,5s)
audible signal and yellow LED light.
The way of relay switching can be set by a jumper – 5s pulses
when the CO concentration exceeds and falls below the set
2
CO level for e.g. opening and closing a skylight, or standard
2
switching, where relays are closed until the measured CO
concentration drops under the set CO
So the sensor efficiently manages ventilation and heat
recovery units, based on current room air quality.
The current air quality can easily be determined by looking at
the three LED indicators. The
quality necessary to achieve a sense of well-being and at the
same time optimal energy costs for heating, ventilation or air
conditioning.
Explanation of abbreviations and technical terms can be
found on our website in the
Protronix s.r.o., Pardubická 177, Chrudim 537 01, Czech Republic
.docx
um-nlii-co2-r-5-a-en-v4-211115
NLII-CO2-R-5-A |
CO output
2
0-10 V/0-20 mA/4-20 mA
0-10 V/0-20 mA/4-20 mA
concentration
2
level.
2
eco level means good indoor air
Glossary section.
Room sensor CO
2
) in
2
Relay
1)
1x NO/C
1)
2x NO/C
Technical data
Parameter
Supply voltage range
Average consumption
CO measuring range
2
CO accuracy
2
CO relay - hysteresis
2
CO rate rise
2
CO step response
2
Max. switching voltage
2
Max. switching current
Working humidity
no condensing
Working temperature
Storage temperature
Expected lifetime
Ingress protection
Dimensions
www.protronix.cz/en/ www.careforair.eu/en/
User manual
with sound alarm
Value
12 – 35
12 – 24
0,5
400 – 5000
± 35 ppm ±5 % of reading
100
max 1
(90 %) 80
250/30
5/5
5 – 95 %
0 to +50
-20 to +60
min. 10
IP20
90x80x31
Unit
V DC
V AC
W
ppm
ppm
min
s
V AC / V DC
A AC / A DC
RH
°C
°C
years
mm
1/6