Figure 6: Connecting one AC supply to several
transmitters
Completing the installation
About this task:
Install the cover on the mounting base:
1. Slide the bottom of the cover onto the tabs at the
bottom of the mounting base.
2. Tilt the top of the cover toward the mounting base.
3. Insert the locking screw on the top of the
transmitter and secure the locking screw with a No.
1 Phillips-head screwdriver.
Result
If power is supplied to the screw terminals, the transmitter
starts when you close the cover.
Setup and adjustments
Commissioning
CD-W00-x0-2 Series Wall Mount CO
2
and Temperature
Transmitters are factory-calibrated for the following:
• output signal, 0 to 10 V and 4 to 20 mA, proportional to
CO
2
concentration, 0 to 2,000 parts per million (ppm)
• altitude range of 0 to 2,000 ft (0 to 600 m) without
compensation
For altitudes above 2,000 ft (600 m) where optimum
accuracy of the CO
2
concentration measurement is
essential, modify the Building Automation System (BAS)
controller’s analog input (AI) high range to compensate
for sensor placement at other than the standard
calibration altitude.
To do this, reset the 2,000 ppm value using the controller’s
compensation factor (CF) shown in Figure 7 or Figure 8.
Calculate the corrected value:
Corrected Value = CF x 2,000
For example, if the sensor is situated at an altitude of 3,000
ft (914.4 m) above sea level, the CF is 1.10. See Figure 7 or
Figure 8. The corrected value is:
Corrected Value = 1.10 x 2,000 ppm = 2,200 ppm
Note:
For altitude compensation, only adjust the AI
high range. The AI low range should remain at zero.
Figure 7: Altitude compensation, feet above sea level
Figure 8: Altitude compensation, meters above sea
level
Troubleshooting
About this task:
The CO
2
transmitter is not field repairable. In the event the
unit is not functioning correctly, identify the symptoms
and determine a solution:
1. Verify that the unit is mounted correctly.
2. Verify that all wiring is correct.
3. Verify that the power supply voltage level is20 to 30
VAC or 18 to 30 VDC.
Result
If the CO
2
transmitter does not operate after completing
these steps, replace the unit.
Repair information
If the CD-W00-x0-2 Series Wall Mount CO
2
and
Temperature Transmitters fail to operate in their
specifications, replace the units. For a replacement
CO
2
transmitter, contact the nearest Johnson Controls®
representative.
CD-W00-x0-2 Series Wall Mount CO
2
and Temperature Transmitters Installation Guide
4
