Johnson Controls CD-Pxx-00-0 Series Installation Guide
24-9601-0,Rev.C
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter
Installation Instructions
CD-Pxx-00-0 |
Part No. 24-9601-0, Rev. C |
|
Issued April 2016 |
|
Refer to the QuickLIT website for the most up-to-date version of this document. |
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.
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
1.54 (42)
0.87 (22)
Center |
1.65 (42) |
Hole |
|
|
<![if ! IE]> <![endif]>FIG:dim |
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
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.
Figure 1: Mounting Holes on the Flange Dimensions in. (mm)
Mounting
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 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.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Instructions
1
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.
|
|
|
Output |
|
|
CO Transmitter Signals |
Controller |
||
|
|
2 |
V |
|
|
|
~ |
|
|
|
|
or |
|
|
24 VAC |
Supply |
+ |
mA |
|
|
Voltage |
~ |
0 |
|
|
|
- |
Shared |
|
|
|
CO2 |
Transmitter |
|
|
|
Common |
||
|
|
|
V |
|
|
|
|
Line |
|
|
|
~ |
or |
|
|
|
|
||
24 VAC |
Supply |
+ |
mA |
<![if ! IE]> <![endif]>ac1 |
|
Voltage |
- |
0 |
<![if ! IE]> <![endif]>FIG:conn |
|
|
~ |
|
|
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.
Output
2 Transmitter Signals Controller
~ |
V |
or |
|
+ |
mA |
|
~ |
0 |
|
|
|
- |
Shared |
||
|
CO2 |
Transmitter |
||
|
Common |
|||
|
|
V |
||
|
|
Line |
||
|
~ |
or |
||
|
|
|||
Supply |
+ |
mA |
<![if ! IE]> <![endif]>FIG:connac2 |
|
Voltage |
~ |
0 |
||
|
||||
|
- |
|
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).
Nut
Adaptor Body
Adaptor
<![endif]>FIG:ins_cond
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
To wire the PCB’s input and output connections: 1. Open the transmitter cover.
CD-Pxx-00-0 Series Duct Mount CO2 Transmitter Installation Instructions
2
Loading...