®
Installing the Sensor
!WARNING!
Before performing service or maintenance operations on the systems, turn OFF main power switches to the unit.
Electric shock can cause personal injury. Please read and follow the wiring instructions precisely; miswiring may cause permanent damage to the product .
Basic Installation for T8100-NS and NSP
1.
Separate the case into its front and rear sections.
2.
Secure the rear section of the case to the wall or junction box using the supplied screws, and make necessary wire connections.
3.
Mount the Controller on the base by aligning the top clips and then securing to the bottom clips. Secure the Ventostat with the supplied set screw. A one-minute stabilization warmup will take place.
Telaire Ventostat™ T8100 NS and NSP Series
CO
2
Sensor
User Instructions
Amphenol Advanced Sensors
6860 Cortona Dr., Suite B
Goleta, CA 93117 www.amphenol-sensors.com
Internal Label
Amphenol
Advanced Sensors
T63351-003
September 2014
Page 1 of 4
T8100-NS/NSP Wiring Diagrams
The Ventostat T8100-NS and T8100-NSP family of products has two basic configurations.
T8100-NS provides simultaneous voltage and current outputs for CO
2
, an independent thermistor with Night Setback Override Button. The button shorts the thermistor when depressed.
T8100-NSP provides simultaneous voltage and current outputs for CO
2
, an independent thermistor with Night Setback Override Button and slide
Potentiometer that can be used to control thermostat set point. The slide potentiometer has 0 KOhm value in the left position and 100 KOhm value in the right position; the middle position corresponds to 50 KOhm value.
The functional block diagram of T8100-NSP is presented in Figure 1.
The electrical circuits of thermistor, Night Setback Overage Button and potentiometer have common signal between each other as shown in
Figure 1.
The electrical circuits of the CO
2
sensor power supply and outputs, from one side and thermistor, Night Setback Override Button and
Potentiometer from the other, are electrically isolated from each other.
For electrical wiring and power supply requirements, these two configurations are identical. The recommended wire gauge is 18-22
AWG (1.0 to 0.75 metric).
!WARNING!
Ventostat T8100-NS/NSP products have two terminal pins that are connected inside the sensor to a common/ground: pin #7 on the I/O terminal blocks and pin #2 on the power block. Do NOT connect positive (hot) 24 VAC power line to terminal number 2 of the terminal block.
(+) and Night Setback Button
Slide potentiometer
T8100-NSP only
Left – 0 KΩ Right – 100 KΩ
(“-“ common)
(+)
CO2 4-20 mA out
Use either or both
CO2 outputs
CO2 0 -10/5 V out
Jumper selectable 8 7 6 3 2 1
18 - 30
VAC RMS
2 1
_ +
L2 L1
Figure 2: T8100-NS/NSP Wiring for 3-Wire System,
AC Power
(+)
Thermistor 10 KΩ Type II and Night Setback Button
(“-“ common)
(“-“ common)
Slide potentiometer
T8100-NSP only
Left – 0 KΩ; Right – 100 KΩ
(+)
CO2 4-20 mA out
Use either or both
CO2 outputs
Common
(ground)
CO2 0 -10/5 V out
Jumper selectable 8 7 6 3 2 1
18 - 30
VAC RMS
L2 L1
2 1
_ +
Figure 3: T8100-NS/NSP Wiring for 4-Wire System,
AC Power
Caution!
The T8100 Ventostats are either 3-wire or 4-wire type configurations, powered by either AC or DC voltage.
They are not 2-wire or loop-powered devices. Wiring the units as 2-wire or loop-powered devices will irreparably damage the sensors and void the warranty.
NS button
Thermistor
AC+/DC+
AC-/DC-/GND
THERM
COM
POT (T8100 NSP only)
CO2 sensor
4 -20 mA current source
0 -10/ 0 – 5V voltage source
I CO2
GND
V CO2
Figure 1: T8100-NS/NSP Functional Block Diagram
Page 2 Telaire Ventostat™ T8100 NS and NSP Series
Ventostat Specifications
Sensing Method
Non-dispersive infrared (NDIR) absorption
Gold-plated optics
Patented ABC Logic self calibration algorithm
CO
2
Measurement Range
T8100
0 to 2000 ppm (0 ppm = 0 V, 4 mA; 2000 ppm = 10/5V, 20 mA)
CO
2
Accuracy
±30 ppm or 3% of reading, whichever is higher*
Power Supply Requirements
18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC, polarity protected
Power Consumption
Typical 0.7 W at nominal voltage of 24V AC RMS
Temperature Dependence
0.2% FS per °C (±0.11% per °F)
Stability
<2% of FS over life of sensor (15 years)
Pressure Dependence
0.135% of reading per mm Hg
Certifications
CE and RoHS compliant
Signal Update
Every 5 seconds
CO
2
Warm-up Time
< 2 minutes (operational)
10 minutes (maximum accuracy)
Operating Conditions
32°F to 122°F (0°C to 50°C)
0 to 95% RH, non-condensing
*CO
2
accuracy statement excludes standard gas used for calibration that has an accuracy of 2%. In addition, there is a potential digital to analog error of up to 1%.
Storage Conditions
-40°F to 158°F (-40°C to 70°C)
Flammability Classification
UL94 5VA
Thermistor Type
NTC 10 K
thermistor
Thermistor Accuracy
±1°C (15° to 35°C)
Night Setback Override Button (NS and NSP)
Shorts the thermistor output when depressed
Slide Potentiometer (NSP Only)
Left (stop) 0k Ohms (±5k
)
Center 50k Ohms (±7.5k
)
Right (stop) 100k Ohms (±15
)
ABC Logic™ Self Calibration System
ABC Logic™ (Automatic Background Calibration) self calibration allows the sensor to continually recalibrate itself when the indoor concentrations drop to outside levels while the building is unoccupied.
Generally a building must be regularly unoccupied for 4 hours or more for this self-calibration system to operate properly. Under these conditions, ABC Logic™ should maintain sensor calibration over the lifetime of the sensor. The ABC Logic™ should be turned OFF where a building is continuously occupied 24 hours per day, or where there could be significant sources of non-occupant related CO
2
such as greenhouses, breweries and other industrial and food processing applications.
Output
Analog
0 to 5 V, (100
output impedance)
0 to 10 V (100
output impedance) and
4 to 20mA (R
L
maximum 500
) available simultaneously for CO
2 output
Digital to analog error ±1%
Telaire Ventostat™ T8100 NS and NSP Series Page 3
Warranty/Other
Warranty
18 months parts and labor
This product is covered by one or more of the following patents:
5,650,624 / 5,721,430 / 5,444,249 / 5,747,808 / 5,834,777 / 5,163,332 /
5,340,986 / 5,502,308 / 6,344,798 / 6,023,069 / 5,370,114 / 5,601,079 /
5,691,704 / 5,767,776 / 5,966,077 / 6,107,925 / 5,798,700 / 5,945,924 /
5,592,147 / 6,255,653 / 6,250,133 / 6,285,290
Warranty Repairs
Amphenol Thermometrics, Inc. will repair Telaire product that fails to meet the terms provided for in the Return and Warranty Policy
Statement (See, http://www.amphenol-sensors.com).Warranty period shall start from date of manufacture and be based on product category and type of equipment as specified in Table 1: Product Warranty
Periods. For all warranty repairs, Amphenol Thermometrics, Inc. will bear all product repair parts, labor, and standard ground shipping charges.
Page 4
U.S.A.
Sales and Services
(Repair/Calibration):
Amphenol Thermometrics, Inc.
St Marys Center
967 Windfall Road
St Marys, Pennsylvania 15857
U.S.A.
T: +1 814-834-9140
F: +1 814-781-7969
U.K.
Sales and Service:
Amphenol Thermometrics (U.K.) Limited
Crown Industrial Estate Priorswood Road
Taunton, TA2 8QY, UK
T: +44 1823-335-200
Brazil
Sales and Service
Amphenol TFC DO Brazil LTDA
Rodovia Governador Adhemar
Pereira de Barros KM 121,5 S/N
13098-396 Campinas
Sao Paulo, Brazil
Customer Support Centers
U.S.A.
Technical Support:
Amphenol Thermometrics, Inc.
St Marys Center
967 Windfall Road
St Marys, Pennsylvania 15857
U.S.A.
T: +1 814-834-9140
F: +1 814-781-7969
China:
Amphenol (Changzhou)
Connector Systems
305 Room, 5D
Jintong Industrial Park
Wujin, Changzhou, Jiangsu, China
T:+86 519 8831 8080 ext. 50087
F:+86 519 8831 2601
Amphenol
Advanced Sensors
www.amphenol-sensors.com
www.telaire.com
©2014 Amphenol Thermometrics, Inc. All rights reserved.
Technical content subject to change without notice.
Telaire Ventostat™ T8100 NS and NSP Series
