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Carrier NSA-HH/CO2-R2-CP-C, Additional Instructions For Installation And Operation

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Carrier NSA-HH/CO2-R2-CP-C Additional Instructions For Installation And Operation Download Page 6

CO2 Room Sensor with Temperature 

Installation and Operation

 

 
 

#NSA-HH/CO2-R2-CP-C, NSA-HH/CO2-R2O-CP-C, NSA-HH/CO2-R2SO-CP-C 

– 11/14/2019 

 

Specifications subject to change without notice. 

Catalog No. 11-808-794-01 

Page 

6

 of 

6

 

Maintenance / Calibration 

The NSA-HH/CO2-R2 is basically maintenance free in normal environments thanks to the built-in self-correcting ABC 
algorithm. The ABC logic may need to be turned off in some applications, such as those with continuous occupancy. 
Discuss your application with ACI in order to get advice for a proper calibration strategy. 

NOTE

  The sensor accuracy is defined at continuous operation (at least 3 weeks after installation) 

Summary of Contents for NSA-HH/CO2-R2-CP-C

Page 1: ...Numbers NSA HH CO2 R2 CP C NSA HH CO2 R2O CP C NSA HH CO2 R2SO CP C Specifications Supply Voltage 24 VAC 20 50 60 Hz half wave rectifier 16 5 40 VDC Max Power Consumption 3 VA for 24 VAC 3W for 24 VDC peak 0 9W average Sensing Technology Single beam infrared sensing technology NDIR Sensing Method Diffusion Measurement Range Default 0 to 2 000 ppm Extended CO2 Ranges Up to 10 000 ppm factory set Ex...

Page 2: ...ttom View Figure 1 Installation PRECAUTIONS Remove power before wiring Never connect or disconnect wiring with the power applied Do not allow live wires to touch the circuit board An isolation transformer is recommended when powering the device with 24vac Do not run the wiring in any conduit with line voltage Failure to wire devices with the correct polarity when using a shared transformer may res...

Page 3: ...er supply has to be connected to VIN and COM COM is considered as system ground 1 Mount the wall plate Run the wires from the back of the wall plate and through the square wire hole in the PCB Mount the wall plate to the wall being careful not to trap wires between the wall and the plate 2 Configure DIP switches The default setting is 0 10 VDC output switch 1 on and ABC on switch 2 on For 0 5 VDC ...

Page 4: ...int if these configurations are used Figure 4 Power Supply The power supply has to be connected to VIN and COM COM is considered as system ground The same ground reference has to be used for the NSA HH CO2 R2 unit and for the DDC signal receiver Connections of the main terminal of NSA HH CO2 R2 Shielded cable with 16 to 22AWG conductors is recommended The cover must be removed to wire the unit s t...

Page 5: ...ge reference VOUT 4 20mA Analogue output 1 Analogue output 2 0 5 VDC or 0 10 VDC 4 to 20mA 0 2000 ppm CO2 0 2000 ppm CO2 4 Attach and secure cover There are two tabs on the top of the cover that fit into slots on the top of the wall plate Begin with the cover above the wall plate with the bottom of the cover angled out from the wall plate Move the cover down to seat the tabs and then push the bott...

Page 6: ...ce Calibration The NSA HH CO2 R2 is basically maintenance free in normal environments thanks to the built in self correcting ABC algorithm The ABC logic may need to be turned off in some applications such as those with continuous occupancy Discuss your application with ACI in order to get advice for a proper calibration strategy NOTE The sensor accuracy is defined at continuous operation at least ...

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