CD-Wxx-00-0 Series
Installation Instructions CD-Wxx-00-0
Issue Date 0501
Wall Mount CO
Application Requirements
IMPORTANT: The CD-Wxx-00-0 Series
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.
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.
Transmitter
2
Installation
Parts Included
• Wall Mount Carbon Dioxide (CO
(includes base, PCB, and cover)
• Drywall Mounting Kit (includes two each
No. 6-20 x 1-1/4 in. pan-head, self-tapping screws,
spring clips, and spacers)
) Transmitter
2
Mounting
The CO2 transmitter is shipped ready for installation
onto a standard wallbox or for 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 to a U.S. wall box or directly
to a wall surface:
Locate the device on an inside wall, free from drafts,
and out of direct sunlight. The transmitter is shock and
vibration resistant; however, be careful not to drop the
unit or 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)
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.
© 2001 Johnson Controls, Inc.
Part No. 24-09601-27, Rev. — www.johnsoncontrols.com
• Humidity: 0 to 85% Relative Humidity (RH),
non-condensing 85°F (29°C) maximum dew
point
1
Surface Mounting
Use the following procedure to mount the CO
2
transmitter to a drywall surface:
1. Using a hole saw with a 1-3/8 in. blade, drill the
center hole in the surface where the sensor will be
mounted, then pull the wiring through the drilled
hole.
2. Using only the drywall mounting holes indicated in
Figure 1, mark the location of the two mounting
holes and drill the 1/8 in. holes.
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
Wallbox
Mounting
Hole
Wallbox
Mounting
Hole
Drywall
Drywall
Mounting
Hole
Center
Hole
Drywall
Mounting
Hole
Figure 1: Transmitter Base
1-3/8 in.
(35 mm)
Hole
Base
Spring
Clips (2)
Figure 2: Surface Mounting to Drywall
3. Insert the spring clips as shown in Figure 2. (Use
the spacers for 3/8 or 1/2 in. drywall.)
Note: Replacement spring clips, spacers, and
screws can be ordered separately as the
Drywall Mounting Kit (ACC-DWCLIP-0).
4. Pull the wiring through the base’s center hole.
5. Center the two holes in the base over the drilled
holes, and fasten the base to the drywall using the
No. 6 screws provided (Figure 1 and Figure 2).
!
CAUTION: When mounting to drywall, use
the specified holes (see Figure 2) with the provided
spring clips. Other mounting may cause the screws
to damage the PCB or cause a short circuit.
Two No. 6
Self-Tapping
Screws (Provided)
IMPORTANT: To prevent drywall damage,
do not overtighten the screws.
6. To install the PCB into the base, refer to Figure 3
and:
• align the PCB over the latch pins on the base.
• press down on the board until it snaps into
place and is secured by the latches.
7. Proceed to the
Wiring
section.
2 CD-Wxx-00-0 Series Wall Mount CO
Transmitter Installation Instructions
2
Wallbox
Screw
Holes
Drywall
Screw
Holes
Sensor
Center
Hole
Base
PCB
Cover
5. Proceed to the Wiring section.
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, to avoid current peaks, use a DC
supply (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.
Figure 3: Mounting the Transmitter
Wallbox Mounting
To mount the transmitter to a standard wallbox, refer
to Figure 4 and proceed as follows:
1. Pull the wiring through the wallbox and the
transmitter’s base.
2. Rotate the base so the arrow points up.
3. Fasten the base to the wallbox with
two No. 6-32 screws (not provided) using the
curved wallbox mounting holes shown in Figure 1
and Figure 4.
Standard
Wallbox
Base
Two
No. 6-32 Screws
(Not Pr ovided)
Figure 4: Mounting to a Wallbox
4. To install the PCB into the base, refer to Figure 3
and:
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 5.
Output
24 VAC
24 VAC
Supply
Vol tage
Supply
Vol tage
2
~
+
~
-
CO Transmitter
~
+
~
-
V
or
mA
0
2
V
or
mA
0
SignalsCO Transmitter
Controller
Shared
Common
Line
Figure 5: Connecting Separate AC Supplies
(Recommended)
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 6) may cause a short
circuit.
Output
24 VAC
Supply
Vol tage
Supply
Vol tage
2
~
+
~
-
CO Transmitter
~
+
~
-
V
or
mA
0
2
V
or
mA
0
SignalsCO Transmitter
Controller
Shared
Common
Line
• align the PCB over the latch pins on the base.
• press down on the board until it snaps into
place and is secured by the latches.
CD-Wxx-00-0 Series Wall Mount CO2 Transmitter Installation Instructions 3
Figure 6: Connecting One AC Supply to
Several Transmitters (Not Recommended)
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