Johnson Controls CD-P Series Manuale utente
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter
Installation Guide
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 may cause harmful
interference, in which case the users will be required to
correct the interference at their own expense.
Warning (Part 15.21)
Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.
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.
Industry Canada Statement(s)
This device complies with Industry Canada licence-exempt
RSS standard(s). Operation is subject to the following two
conditions:
1. This device may not cause interference, and
2. This device must accept any interference, including
interference that may cause undesired operation of
the device.
Le présent appareil est conforme aux CNR d'Industrie
Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions
suivantes :
1. L'appareil ne doit pas produire de brouillage, et
2. L'utilisateur de l'appareil doit accepter tout
brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le
fonctionnement.
Installation
Important: The CD-Pxx-00-0 Duct Mount CO2
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.
Parts Included
The duct mount CO2 transmitter is shipped assembled.
It consists of three main parts: base and Printed Circuit
Board (PCB), cover, and mounting flange with four screws
(for probe depth adjustment). A conduit adaptor is also
included.
Dimensions
Figure 1: Mounting Holes on the Flange Dimensions in.
(mm)
Mounting
About this task:
Location Considerations
When selecting a location for the transmitter, note the
following:
• The transmitter is designed for duct mounting in any
position.
• 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 between the probe
*2496010C*
Part No. 24-9601-0 Rev. C
2021-04-08
CD-Pxx-00-0
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.
3. Using the mounting flange as a template centered
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, and the risk of a short circuit increases.
All commons must be at the same potential.
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.
Figure 2: Connecting Separate AC Supplies
(Recommended)
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.
Figure 3: Connecting One AC Supply to Several
Transmitters (Not Recommended)
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).
Figure 4: Inserting the Conduit Adaptor
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
About this task:
To wire the PCB’s input and output connections:
1. Open the transmitter cover.
2. Insert the wire carefully through the conduit
adaptor and then strip 1/4 in. (6.35 mm) of the wire
insulation to prepare the wire for connection to the
terminal block.
3. Connect the 24V supply between the positive ( )
and negative ( ) terminals as shown in Figure 5.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Guide2
Figure 5: Transmitter PCB
Configuring the Output
About this task:
The transmitter is capable of generating either voltage or
current output. To select, refer to Figure 5 and:
1. Connect the common wire to Terminal 0.
2. Connect the other wire to:
- Terminal V (for voltage output)
- Terminal mA (for current output) and
configure the pins marked 0/4mA as follows:
- - 4 to 20 mA: connect the jumper so
that it shorts the pins (default)
- - 0 to 20 mA: disconnect (do not
discard) the jumper
3. If the unit has an optional relay accessory, follow
the procedure described in the Wiring the Relay
section and then reposition the cover.
Wiring the Relay
Model CD-PR0-00-0 is shipped with a relay module. To wire
the relay, see Figure 6, and attach the relay wires to the
relay PCB's two screw terminals.
Figure 6: Relay PCB
The relay has two setpoint values: the On level and the Off
level. These levels provide hysteresis and desired control
function. The On level must be higher than the Off level.
When CO2 concentration is increasing; the relay closes at
the On level, and the relay opens when concentration is
reduced to the Off level.
Note: The default relay setpoints are 1,000 ppm On
and 950 ppm Off. Change these settings by entering
new values using the Relay Setpoint Software ACC CD
S.
Setup and Adjustments
Commissioning
Johnson Controls® Carbon Dioxide (CO2) transmitters
come from the factory calibrated for the following:
•output signal (0 to 10 V) proportional to CO2
concentration (0 to 2,000 parts per million [ppm])
• altitude range of 0 to 1,969 ft (0 to 600 m) above sea
level without compensation
• default relay output trigger point of 1,000 ppm
Altitude Compensation
The sensors are calibrated for an altitude of 984 ft (300
m) above sea level and are intended for applications
within the range of 0 to 1,969 ft (0 to 600 m) without
compensation.
For altitudes above 1,969 ft (600 m) where optimum
accuracy of the CO2 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.
Note: For altitude compensation, only adjust the AI
high range. The AI low range should remain at zero.
To modify the controller’s AI, reset the 2,000 ppm value
using the controller's Compensation Factor (CF) shown in
Figure 7 or Figure 8 as follows:
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, CF, from either Figure 7 or
Figure 8, is 1.10.
The new value is calculated as follows:
Corrected Value = (1.10)(2,000 ppm) = 2,200 ppm
Figure 7: Altitude Compensation in Feet Above Sea
Level
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Guide 3
Figure 8: Altitude Compensation in Meters Above Sea
Level
Troubleshooting
About this task:
The transmitter is not field repairable.
In the event the unit is not functioning properly, perform
the following to identify the symptoms and determine a
solution; verify that:
1. the unit is mounted properly and the appropriate
output jumper is selected
2. all wiring is correct
3. the power supply voltage level is 20 to 30 VAC or 18
to 30 VDC
Result
Note: The diagnostic Light Emitting Diodes (LEDs)
shown in the lower right-hand corner of Figure 5
indicate operational status:
• V7 lights up if the self-diagnostics procedure detects an
abnormality.
• V10 pulses to indicate that the device is operational.
If the transmitter does not operate after completing these
steps, replace the unit.
Testing the Relay Module
About this task:
To confirm that the relay is operating correctly, perform
the following procedure:
Important: To expose the sensing portion of the
probe, loosen the probe retention screw, and remove
the probe from the duct. After testing is complete,
reinstall the probe, and tighten the probe retention
screw.
1. Temporarily shut off power to the unit.
2. Temporarily remove wires connected to the relay
screw terminal.
3. Connect a multimeter to the relay terminals.
4. Read the resistance level to determine whether the
contacts are open or closed.
- If the contacts are closed, replace the unit with
the appropriate relay module, and restart this
procedure.
- If the contacts are open, apply power to the
transmitter.
5. Determine whether the contacts are open or closed.
- If the contacts are closed, the relay is
functioning properly, and no further testing is
necessary.
-If the contacts are open, increase the CO2
concentration by exhaling near the probe,
looking for a change in the resistance value.
-If no change is noted, confirm that the CO2
concentration has been raised above the trip
point.
- - Check the transmitter output signal
with a voltmeter to make sure the
signal has risen above the 1,000 ppm
relay trip point.
- - If the output signal has not
reached the trip point, it may be
necessary to further increase the CO2
concentration.
- If the contacts are open after exceeding
the trip point, replace the unit with the
appropriate module, and restart this
procedure.
6. Disconnect power to the transmitter.
7. Disconnect the multimeter from the relay terminals.
8. Reconnect the wires to the relay screw terminal.
9. Reconnect power to the transmitter.
10. Reposition the cover.
Repair Information
If the CD-Pxx-00-0 Series Duct Mount CO2 Transmitter fails
to operate within its specifications, replace the unit. For
a replacement transmitter, contact the nearest Johnson
Controls representative.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Guide4
Technical Specifications
Table 1: CD-Pxx-00-0 Series Duct Mount CO2 Transmitter
Specification Description
Measuring Range 0 to 2,000 ppm CO2
Accuracy at 77°F (25°C) < ±[30 ppm CO2 + 2.0% 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 < 0.5% of Full Scale
Temperature of Dependence of Output < 0.56% of Full Scale/F° (<0.1% of Full
Scale/C°)
Long-Term Stability < ±5.0% of Full Scale/5 Years
Response Time (0 to 63%) 1 Minute
Operating Temperature Range 23 to 113°F (-5 to 45°C)
Storage Temperature Range -4 to 158°F (-20 to 70°C)
Humidity Range 0 to 85% non-condensing
Transmitter Output Signal CO2Jumper Selectable: 0 to 20 mA or 4 to
20 mA or 0 to 10 VDC (Default)
Maximum Output Current: 25 mA;
Maximum Output Voltage: 12.5 V
Maximum 30 V, 0.5 A, Class 2
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 < 2.5 W Average, 4.1 VA
Warm-up Time < 5 minutes
Airflow Range 0 to 7,500 ft/Minute (0 to 2,286 m/
Minute)
Duct Probe Material Duct Probe Meets Plenum Rating
Requirements of UL 1995, Heating and
Cooling Equipment
Housing Material ABS Plastic
Dimensions (H x W x D) 3-5/32 x 3-3/16 x 8 in. (80 x 81 x 204
mm)
Shipping Weight 0.3 lb (140 g)
United States UL Listed, CCN XAPXCompliance
Canada UL, LIsted XAPX7
Europe CE Mark – Johnson Controls, Inc.
declares that the CD-Pxx-00-0
Duct Mount CO2 Transmitters are
in compliance with the essential
requirements and other relevant
provisions of the EMC Directive.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Guide 5
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 shall not be liable for damages
resulting from misapplication or misuse of its products.
Product warranty
This product is covered by a limited warranty, details of which can be found at www.johnsoncontrols.com/
buildingswarranty.
Software terms
Use of the software that is in (or constitutes) this product, or access to the cloud, or hosted services applicable to
this product, if any, is subject to applicable end-user license, open-source software information, and other terms
set forth at www.johnsoncontrols.com/techterms. Your use of this product constitutes an agreement to such terms.
Patents
Patents: https://jcipat.com
Single point of contact
APAC Europe NA/SA
JOHNSON CONTROLS
C/O CONTROLS PRODUCT MANAGEMENT
NO. 32 CHANGJIJANG RD NEW DISTRICT
WUXI JIANGSU PROVINCE 214028
CHINA
JOHNSON CONTROLS
WESTENDHOF 3
45143 ESSEN
GERMANY
JOHNSON CONTROLS
507 E MICHIGAN ST
MILWAUKEE WI 53202
USA
Contact information
Contact your local branch office: www.johnsoncontrols.com/locations
Contact Johnson Controls: www.johnsoncontrols.com/contact-us
© 2021 Johnson Controls. All rights reserved. All specifications and other information shown were current as of document revision and
are subject to change without notice.
www.johnsoncontrols.com
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