VERIS CWE2C Economy Wall Mounted Air Quality Sensors Installation Guide
- June 14, 2024
- VERIS
Table of Contents
CWE2C Economy Wall Mounted Air Quality Sensors
CWE2
CWE2 Series
Economy Wall Mounted Air Quality Sensors
NOTICE
- This product is not intended for life or safety applications.
- Do not install this product in hazardous or classifed locations.
- Read and understand the instructions before installing this product.
- Turn of all power supplying equipment before working on it.
- The installer is responsible for conformance to all applicable codes.
If this product is used in a manner not specifed by the manufacturer, the protection provided by the product may be impaired. No responsibility is assumed by the manufacturer for any consequences arising out of the use of this material.
Product Overview
The CWE2 Series of air quality sensors for living space are for use with BAS
controllers designed to accept 4 to 20mA, 0 to 5 Vdc or 0 to 10 Vdc outputs.
These sensors measure CO2 levels using a dual-beam, non-dispersive infrared
(NDIR) technology.
The CWE2 Series Economy sensor has an accuracy of ±30 ppm ±3% of measured
value, features 2-wire 4 to 20mA and 3-wire voltage outputs, and is available
with optional temperature output.
Product Identification
User Interface
CWE2 = None
Blank
C= 1000 PT RTD
D= 10K T2 thermistor
H= 10K T3 thermistor
K= 10K curve G/11K shunt
M= 20K NTC thermistor
N = 1.8K TAC thermistor
Specifications
OPERATING ENVIRONMENT
Input Power| Class 2; 20 to 30 Vdc, 24 Vac, 50 to 60 Hz
Max. Current| 20 mA
Analog Output| Selectable 4 to 20 mA, 0 to 5 V, 0 to 10 V
Analog Voltage Output Mode| 51(0 minimum load resistance
Analog Current (mA) Output Mode| 5000 maximum load resistance
Operating Temp. Range| 0 to 50 °C (32 to 122 °F)
Operating Humidity Range| 0 to 95% RH non-condensing
Housing Material| High-impact ABS plastic
Terminal Block Torque| 0.5 to 0.6 N-m (0.37 to 0.44 in-lbf)
IP Rating| IP 30
Mounting Location| For indoor use only. Not suitable for wet locations.
Surface Mount| The device can be surface mounted on Single Gang 1-Box, British
Standard and CE60 wall boxes
COs TRANSMITTER
Sensor Type| Dual-beam, non-dispersive infrared (NDIR), diffusion sampling
Output Range| 0 to 2000 ppm
Accuracy| ±30 ppm ±3% of measured value
Repeatability| ±20 ppm ±196 of measured value
Startup Time| s20 seconds
Response Time| s 75 seconds for 90 degree step change
Max. Load Resistance*| 100 0 at 20 Vdc
250 0 at 24 Vdc
500 0 at 30 Vdc
---|---
WIRING TERMINALS
Terminal Blocks| Screw terminals, 18-24 AWG
Screw Terminal Torque| 0.2 N-m (2.0 in-lbF) max.
WARRANTY
Limited Warranty| 3 years
COMPLIANCE INFORMATION
Agency Approvals| UL 916, European conformance CE:
EN61000-6-2 EN61000-6-3 EN61000 Series – industrial immunity
EN 61326-1 FCC Part 15 Class B, REACH, RoHS, RCM (Australia), ICES-003
(Canada)
- Applicable for CWE2 4-20 mA current mode only. If load parameters are not met, product will reset.
Dimensions
Functions The CWE2 Series sensor measures CO2 and temperature (if equipped) in
a room and provides analog outputs to a controller.
Installation
- Remove the cover from the base at the bottom of the device.
- Position the sensor base vertically on the wall 1.35 m (4.5 ft.) above the floor with the “UP” arrow facing upward. Locate away from windows, vents and other sources of draft. If possible, do not mount on an external wall, as this may cause inaccurate temperature readings.
- Pull 18 or 22 AWG cable(s) through the hole in the backplate.
- Mount the backplate onto the wall using the screws provided.
Connect the wires to the screw terminals. Do not over-tighten the screws. CWE2 voltage output wiring diagram:
CWE2 current output wiring diagram:
Set the DIP
switches.
| Switch | Function | Description |
|---|---|---|
| 1 | Output mode | ON – 4-20mA output mode enabled |
OFF – Voltage output mode enabled
2| Voltage output range*| ON – 0-5V output range enabled
OFF 0-10V output range enabled
3| Automatic Baseline Calibration (ABC)
for CO2| ON – ABC enabled
OFF – ABC disabledc
4| Unused| Unused
5| Unused| Unused
6| Unused| Unused
7| Unused| Unused
8| Unused| Unused
-
Only used with voltage output mode enabled. Not applicable to setpoint output. Setpoint is 0-10V fixed.
- With sensor base fully installed, align top of cover to mounting tabs on top of sensor base. Swing cover downward until it latches at the bottom.
- Install locking screw to secure cover in closed position.
CO2 Sensor Calibration
There are two methods for CO2 calibration available: 400 ppm baseline
calibration and automatic baseline calibration (ABC).
400 ppm Baseline Calibration
400 ppm baseline calibration allows the sensor to be set at 400 ppm. Push and
hold the calibration button for 3 to 5 seconds. The LED will flash green. Once
the button is released, calibration is complete and the LED switches off.
Automatic Baseline
Calibration (ABC)
The ABC mode addresses the 400 ppm calibration. It allows turning on or off a
background correction/recovery mode that will minimize any calibration error
that has been caused by shock during handling and transportation or is caused
by a long term shift in measurement. The ABC algorithm constantly keeps track
of the sensor’s lowest reading over a preconfigured time interval and slowly
corrects for any long-term drift detected as compared to the expected fresh
air value of 400 ppm. After initial startup, it is expected that the sensor
reaches specified accuracy after 7 to 21 days.
China RoHS Compliance Information
Environment-Friendly Use Period (EFUP) Table
This table is made according to SJ/T 11364.
O: indicates that the concentration of hazardous substance in all of the
homogeneous materials for this part is below the limit as stipulated in GB/T
26572.
X: indicates that concentration of hazardous substance in at least one of the
homogeneous materials used for this part is above the limit as stipulated in
GB/T 26572 Z000057-0B
Z207933-0D
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