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CD-W00-00-0
Installation Instructions CD-W00-00-0
Issue Date 0501
Wall Mount CO
Application Requirements
FCC Compliance Statement
This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when the equipment is
operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area is
likely to cause harmful interference, in which case
the user will be required to correct the interference at
his/her own expense.
Canadian Compliance Statement
This digital apparatus does not exceed the Class A
limits for radio noise emissions from digital
apparatus set out in the Radio Interference
Regulations of the Canadian Department of
Communications.
Installation
IMPORTANT: The CD-W00-00-0 transmitters
are intended to provide input to equipment under
normal operating conditions. Where failure or
malfunction of the transmitter could lead to an
abnormal operating condition that could cause
personal injury or damage to the equipment or other
property, other devices (limit or safety controls) or
systems (alarm or supervisory) intended to warn of,
or protect against, failure or malfunction of the
transmitter must be incorporated into and maintained
as part of the control system.
Transmitter
2
Mounting
The CO2 transmitter is shipped with parts separated,
ready for standard wallbox or surface mounting with
the Drywall Spring Clip Mounting Kit (included).
IMPORTANT: Avoid touching or applying force
to the components on the Printed Circuit Board
(PCB). Handle the board by the edges only.
Location Considerations
This device mounts either on a U.S. wall box or
directly to a wall surface.
Locate the transmitter on an inside wall, free from
drafts, and out of direct sunlight. The device is shock
and vibration resistant; however, be careful not to drop
the unit or to mount it where it could be exposed to
excessive vibration. The following ambient operating
conditions apply:
• Temperature: 23 to 113°F (–5 to 45°C)
• Humidity: 0 to 85% Relative Humidity (RH),
non-condensing 85°F (29°C) maximum dew
point
Center
Hole
Base
PCB
Cover
Parts Included
• Wall Mount Carbon Dioxide (CO
base, PCB, and cover (see Figure 1)
• Drywall Spring-Clip Mounting Kit (includes two
each No. 6-20 x 1.25 in. pan-head,
self-tapping screws, spring clips, and spacers)
© 2001 Johnson Controls, Inc.
Part No. 24-09601-19, Rev. — www.johnsoncontrols.com
) Transmitter:
2
Figure 1: Mounting the Transmitter
1
Page 2
Surface Mounting
Use the following procedure to mount the CO
2
transmitter to a drywall surface:
1. Mark the wall location for the center hole (wiring)
and two mounting screws, using the base as a
template. (For drywall mounting, see Figure 2).
2. Using a 1-3/8 in. (35 mm) hole saw, drill the center
hole.
3. Using the base as a template and a drill with a
1/8 in. (3 mm) bit, drill the screw holes.
4. Insert the spring clips shown in Figure 2. (Use the
spacers for 3/8 or 1/2 in. drywall.)
6. Mount the base onto the wall using the screws
provided. The arrow imprinted on the base shows
the correct mounting position. (See Figure 2.)
IMPORTANT: To prevent drywall damage,
do not overtighten the screws.
7. To install the PCB into the base, refer to Figure 1
and:
• place the PCB under the hook at the right side
of the base (see Figure 3).
• align the PCB over the locating pins.
Note: Replacement spring clips, spacers, and
screws can be ordered separately as the
Drywall Mounting Kit (ACC-DWCLIP-0).
5. Pull the wiring through the base’s center hole.
(See Figure 2.)
Top View
Spacer (2) for
3/8 in. (9.5 mm) and 1/2 in.
(12.7 mm) Thick Drywall
Drywall Drywall
Spring
Clip (2)
1-3/8 in.
(35 mm)
Hole
Spring
Clip
• press down on the board until it snaps into
8. Proceed to the
1-3/8 in.
(35 mm)
Hole
Drywall
place and is secured by the latch.
section.
Wiring
Spring Clip
Base
Two
No. 6-20 x 1.25 in.
Pan-Head Tapping
Screws (Provided)
Figure 2: Surface Mounting to Drywall
Wallbox Mounting
To mount the transmitter to a standard wallbox, refer
to Figure 3 and proceed as follows:
1. Pull the wiring through the wallbox and base.
2. Rotate the mounting base so the imprinted arrow
points up.
3. Fasten the base to the wallbox with
two No. 6-32 screws (not provided).
2 CD-W00-00-0 Wall Mount CO
Transmitter Installation Instructions
2
4. To install the PCB into the base, refer to Figure 1
and:
• place the PCB under the hook at the right side
of the base.
• align the PCB over the locating pins.
• press down on the board until it snaps into
place and is secured by the latch.
5. Proceed to the
Wiring
section.
Page 3
Standard
Wallbox
Latch Pin
Base
Locating Pin
Figure 3: Wiring to a Wallbox
Locating Pin
Hook
Two No. 6-32 Screws
(Not Pr ovided)
If several transmitters share one transformer, the
phase (~) must always be the same at each
transmitter to maintain polarity. A shared common line
at the controller (see Figure 5) may cause a short
circuit.
CO Transmitter
2
Controller
Shared
Common
Line
24 VAC
Supply
Vol tage
Supply
Vol tage
24V
GND
OUT
CO Transmitter
2
24V
Output
Signal
OUTGND
Output
Signal
Figure 5: Connecting One AC Supply to
Several Transmitters (Not Recommended)
Wiring
Power Supply Requirements
The transmitter requires a 24 VAC/VDC, Class 2
power supply maintaining voltages of 18 to 30 VDC or
20 to 30 VAC. Although the power input includes a
halfwave rectifier, using a DC supply is recommended
to avoid excessive current peaks (current
consumption: peak 170 mA, average 85 mA).
24 VAC Power Supply Connections
When more than one transmitter is connected to
one 24 VAC transformer, a common loop is formed at
the controller and the risk of a short circuit increases.
All commons must be at the same potential.
Note: To avoid a short circuit, isolate the 24V power
supply by providing a separate transformer for
each transmitter, as shown in Figure 4.
CO Transmitter
2
24V
GND
OUT
24 VAC
24 VAC
Supply
Vol tage
Supply
Vol tage
CO Transmitter
2
24V
GND
OUT
Figure 4: Connecting Separate AC Supplies
(Recommended)
Controller
Output
Signal
Shared
Common
Line
Output
Signal
1. Strip 1/4 in. (6.35 mm) of insulation from the ends
of the power and output signal.
2. Connect the wires to the PCB screw terminals,
shown in Figure 6.
24V OUTGND
GND
24V
Power
Supply
OUT
Analog
Output
Figure 6: PCB Screw Terminals
Note: The transmitter is capable of generating either
voltage or current output.
3. Select the output using jumpers on the PCB
0 to 10V (default), 0 to 20 mA, or 4 to 20 mA).
4. Use the two jumpers next to the terminal block and
follow the connection configurations shown in
Figure 7.
0 to 10V
0 to 20 mA
4 to 20 mA
0 to 10V
Selected
0 to 20 mA
Selected
4 to 20 mA
Selected
Figure 7: Jumper Settings
5. Reposition the cover as shown in Figure 1.
CD-W00-00-0 Wall Mount CO2 Transmitter Installation Instructions 3
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Setup and Adjustments
Commissioning
Johnson Controls CO
factory calibrated for the following:
• output signal (0 to 10V) proportional to CO2
concentration (0 to 2,000 ppm)
• altitude range of 0 to 1,969 ft (0 to 600m)
above sea level without compensation
Altitude Compensation
The sensors are calibrated for an altitude of 984 ft
(300m) above sea level and are intended for
applications within the range of 0 to 1,969 ft
(0 to 600m) without compensation.
1.30
1.25
1.20
1.15
transmitters come from the
2
For altitudes above 1,969 ft (600m) where optimum
accuracy of the CO
concentration measurement is
2
essential, modify the Building Automation System
(BAS) controller’s Analog Input (AI) ranging 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 8 or Figure 9, as follows:
Corrected Value = CF x 2,000
For example, if the sensor is situated at an altitude of
3,000 ft (914.4m) above sea level, the CF is 1.10
(see Figure 8 or Figure 9).
The new value is calculated as follows:
Corrected Value = (1.10)(2,000 ppm) = 2,200 ppm
CF
CF
1.10
1.05
1.00
0.95
0.90
0
1,000 2,000 3,000 4,000
Altitude (Feet)
5,000
6,000
Figure 8: Altitude Compensation in Feet above Sea Level
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200
Altitude (Meters)
7,000
Figure 9: Altitude Compensation in Meters above Sea Level
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Transmitter Installation Instructions
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Troubleshooting
The transmitter is not field-repairable.
In the event the unit is not functioning properly, use the
following checklist to identify the symptoms and
determine a solution.
1. Verify that the unit is mounted properly and the
appropriate output jumper is selected.
2. Verify that all wiring is correct.
3. Verify that the power supply voltage level is
20 to 30 VAC or 18 to 30 VDC.
Note: The diagnostic Light-Emitting Diode (LED), V7
located on the right side of the PCB, lights up
if the self-diagnostics procedure detects an
abnormality.
If the transmitter will not operate after completing
these steps, replace the unit.
CD-W00-00-0 Wall Mount CO2 Transmitter Installation Instructions 5
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Technical Data
Product CD-W00-00-0 Wall Mount CO2 Transmitter
Measuring Range 0 to 2,000 ppm CO
Accuracy at 77°F (25°C) <±[40 ppm CO2 + 3.0% of reading] (includes manufacturing deviation and drift). All accuracy
specifications reflect testing the transmitters using high-grade, certified gases. Transmitters
are intended for an altitude range of 0 to 1,969 ft (0 to 600 m) above sea level without
compensation.
Non-Linearity <1.0% of Full Scale
Temperature
<0.08% of Full Scale/F° (< 0.15% of Full Scale/C°)
Dependence of Output
Long-Term Stability <5.0% of Full Scale/5 Years
Response Time (0 to 63%) 1 Minute
Operating Temperature
23 to 113°F (-5 to +45°C)
Range
Storage Temperature
-4 to 158°F (-20 to +70°C)
Range
Humidity Range 0 to 85% RH (non-condensing)
Transmitter CO2 Output
Signal
Resolution of Analog
Jumper Selectable 0 to 20 mA or 4 to 20 mA or 0 to 10 VDC
Maximum Output Current: 25 mA; Maximum Output Voltage: 12.5V
10 ppm CO
Outputs
Recommended External
Load
Current Output: Maximum 500 ohms Load Resistance
Voltage Output: Minimum 1,000 ohms Load Resistance
Power Supply Range 20 to 30 VAC (18 to 30 VDC), Class 2
Power Consumption <2.5W Average, 4.1 VA
Warm-up Time <1 Minute
<30 Minutes for Full Specification
Housing Material ABS Plastic
Dimensions (H x W x D) 3-5/32 x 4-9/32 x 1-3/8 in. (80 x 108.5 x 35 mm)
Shipping Weight 0.19 lb (85g)
Agency Listings UL Listed, CCN XAPX (US) and XAPX7 (Canada); EMC Directive (CE Mark), 89/336/EEC;
FCC and DOC Compliant
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The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.
Controls Group
507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201 www.johnsoncontrols.com
6 CD-W00-00-0 Wall Mount CO
Transmitter Installation Instructions
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