Johnson Controls CD-Pxx-00-0 Series Installation Guide
24-9601-0, Rev. C
Figure 1: Mounting Holes on the Flange
Dimensions in. (mm)
0.87 (22)
Center
Hole
1.65 (42)
1.54 (42)
FIG:dim
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter
Installation Instructions
CD-Pxx-00-0
Refer to the QuickLIT website for the most up-to-date version of this document.
Part No. 24-9601-0, Rev. C
Issued April 2016
North American Emissions Compliance
United States
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 this 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.
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
Installation
Parts Included
The duct mount CO2 transmitter is shipped assembled.
It consists of three main pa rts: ba se and Pr inted Circuit
Board (PCB), cover, and mounting flange with four
screws (for probe depth adjustment). A conduit adaptor
is also included.
Dimensions
Mounting
Location Considerations
When selecting a location for the transmitter, note the
following:
• The transmitter is designed for duct mounting in
any position.
IMPORTANT: The CD-Pxx-00-0 Duct Mount CO
Transmitter is intended to provide an input to
equipment under normal operating conditions.
Where failure or malfunction of the transmitter could
lead to personal injury or property damage to the
controlled equipment or other property, additional
precautions must be designed into the control
system. Incorporate and maintain other devices,
such as supervisory or alarm systems or safety or
limit controls, intended to warn of or protect against
failure or malfunction of the transmitter.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Instructions
2
• The probe is best mounted in the return airstream.
• The device should penetrate the duct by a
minimum of 3.0 in. (76.2 mm) to ensure the
sensing part of the element is fully in the airstream.
• The transmitter should be placed in an area free of
condensation.
The transmitter is duct mounted using a flange. The
mounting flange adjusts the distance betwee n the
probe and the inner duct wall. Fasten the mounting
flange with the four screws as follows:
1. Loosen the probe retention screw, and separate
the flange from the assembled unit.
2. Drill a hole 7/8 to 1 in. (22 to 25 mm) diameter in
the duct for the transmitter’s probe.
1
3. Using the mounting flange as a template centered
Figure 2: Connecting Separate AC Supplies
(Recommended)
~
+
~
-
~
+
~
-
0
Shared
Common
Line
24 VAC
Supply
Voltage
CO Transmitter
2
24 VAC
Supply
Voltage
Output
SignalsCO Transmitter
2
Controller
V
0
mA
or
V
mA
or
FIG:conn ac1
0
Line
Supply
Voltage
CO Transmitter
2
24 VAC
Supply
Voltage
SignalsCO Transmitter
2
Controller
~
+
~
-
~
+
~
-
mA
or
mA
or
FIG:conn_ac2
Figure 3: Connecting One AC Supply to Several
Transmitters (Not Recommended)
Figure 4: Inserting the Conduit Adaptor
Nut
Adaptor Body
Adaptor
FIG:ins_cond
on the hole, drill four 1/8 in. (3.18 mm) holes for the
mounting screws positioned as in Figure 1.
4. Fasten the mounting flange onto the duct using the
four screws provided.
5. Insert the probe a minimum of 3.0 in. (76 .2 mm) ,
and tighten the probe retention screw on the
mounting flange.
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, we recommend using a DC supply 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, an d the risk of a short circuit increases.
All commons must be at the same potential.
Output
V
0
Shared
V
Common
Connecting the Conduit Adaptor
1. Align the nut with the opening inside the enclosure,
and hold it in place.
2. Insert the adaptor body into the transmitter conduit
opening.
3. Manually tighten the adaptor into the nut, turning in
a Clockwise (CW) direction (see Figure 4).
Note: To avoid a short circuit, isolate the 24 V power
supply by providing a separate transformer for each
transmitter as shown in Figure 2.
If several transmitters share one transformer, the
phase (~) must always be the same at each transmitter
to maintain polarity and avoid a short circuit via a
shared common line at the controller, as shown in
Figure 3.
IMPORTANT: Do not overtighten the conduit
adaptor. Overtighting the conduit adaptor may
damage or displace the PCB.
4. Insert the wires through the conduit adaptor body
opening.
5. Tighten the adaptor onto the adaptor body by
turning the adaptor in a CW direction.
Wiring the PCB
To wire the PCB’s input and output connections:
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Instructions
1. Open the transmitter cover.
2
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