GE Telaire Ventostat 8000 Series User manual

Telaire Ventostat™ 8000 Series
CO2Sensor
User Instructions
GE
Measurement & Control
T63216-006
January 2012
Page 1 of 4
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 Non-Display Units
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.
Internal Label for Non-Display Units
Jumper Settings for Non-Display (a) and Display (b)
Units
Note: Example b shows outputs of CO2— 4-20 mA and CO2— 0-10
V, humidity— 4-20 mA, and active temperature — 0-5 V.
GE Measurement & Control
6860 Cortona Dr., Suite B
Goleta, CA 93117
www.ge-mcs.com
Basic Installation for Display Units
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.
4. When fitting the T8300 (pitot tube version), complete the
installation by screwing the tube connectors to the input ports on the
sensor. The tubing connectors can be attached to either input port. It
will not affect the performance of the sensor. (See page 3 for further
instructions.)
Internal Label for Display Units
Output
Jumper
Selections
(a) (b)
0-10V 0-5 V
Output
Jumper
Selections

Page 2 Telaire Ventostat™ 8000 Series
Ventostat Wiring Diagrams
The Ventostat family of products has two basic configurations. One
configuration provides three active outputs (CO2, RH and temperature)
and an independent thermistor. It has an output terminal block with pins
#1, 2 and 3. The other configuration provides only CO2outputs and an
independent thermistor and has no terminal block with pins 1, 2, and 3
installed. For electrical wiring and power supply requirements, these two
configurations are identical; please follow the specific instructions for
wiring. The recommended wire gauge is 18-22 AWG (1.0 to 0.75
metric).
!WARNING!
Ventostat products have three terminal pins that are
connected inside the sensor to a common/ground: pin
#2, 5 and 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.
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.
Note: For temperature measurements, Ventostat models contain a
passive thermistor (terminal pins #4 and 5), which is
electrically isolated from the other circuitry and should be
wired independently from active CO2/RH/temperature outputs.
The thermistor has no connection to the Ventostat common
ground and/or power.
The active temperature output has the same common (ground)
as CO2and RH outputs.
Figure 1: Display Unit Wiring for 3-Wire System, AC
Power
Figure 2: Display Unit Wiring for 4-Wire System, AC
Power
Figure 3: Non-Display Unit Wiring for 3-Wire System,
AC Power
Figure 4: Non-Display Unit Wiring for 4-Wire System,
AC Power
Figure 5: Wiring CO2Sensor Voltage Output to
Honeywell M7415 Damper Actuator with W7459 Logic
Module

Telaire Ventostat™ 8000 Series Page 3
Sensing Duct CO2 Concentrations
Duct-Mounting the Enclosures
Ventostat products can be installed inside the return air ductwork, if
needed. As an alternative, please consider the T8031 unit. When
mounting these products inside the ductwork, seal the hole around the
wires and leave the duct insulation in place to prevent condensation
which may damage the sensor.
Pitot Tube Installation for T8300 and T8300-D
Install the mounting bracket, then install the pitot tube assembly as
follows:
Note: The length of the Tygon® tubing is 6 ft. (1.8 m) with the
optional T62892 pitot kit for the T8300. In order to maintain
optimum accuracy, the tubing should not be lengthened. If the
sensor is mounted closer than 3 ft. (0.9 m) the excess tubing
should be shortened to avoid interference with mechanical or
moving devices.
1. To mount the pitot tube, drill one 7/8” hole through the duct.
2. Insert the pitot tube and mark the two remaining holes for the
mounting screws.
3. Punch or drill the two marked holes.
4. Note the direction of airflow in the duct.
5. Note the marking on the pitot tube flange and insert so that it is
properly aligned with the airflow.
6. To ensure an air tight seal, make sure the mounting surface of the
duct is clear of dirt or obstructions. Then, attach the pitot tube to the
duct with sheet metal screws or rivets.
7. Check the length of the tubing before attaching to the sensor. The
tubing should connect without stretching or pulling. If the length is
long enough to create a loop or bind in the tubing, it should be
shortened.
8. To shorten the tubing, remove the connectors that attach to the
sensor and cut the tubing to length.
9. Replace the tubing connectors by using a twisting or screwing
motion. Verify the connection is secure.
Note: If the tubing length has been shortened, be sure the in-line filter
is replaced on the pitot tube connector marked with an “H”.
Accessory Enclosures
Model T1508 Duct Mount Enclosure (Aspiration Box)
The T8100/T8200/T8300 units can be installed inside a Model 1508
Duct Mount Enclosure.
Model T1552 Outside Air Measurement Enclosure
This NEMA-3R weatherproof enclosure includes thermostat and allows
installing the sensor in environments with temperatures down to
-40°F.
Model T1505 Harsh Environment Enclosure
For extreme environments where the sensor might be subjected to
condensation or water spray such as those found in greenhouses or
breweries- NEMA-3R rated.
Ventostat Specifications
Sensing Method
Non-dispersive infrared (NDIR) absorption
Gold-plated optics
Patented ABC Logic self calibration algorithm
CO2Measurement Range
T8100/T8200/T8300
0 to 2000 ppm (0 ppm = 0 V, 4 mA; 2000 ppm = 10/5V, 20 mA)
T8100/T8200/T8300 - 5P models
0 to 5000 ppm (0 ppm = 0 V, 4 mA; 5000 ppm = 10/5V, 20 mA)
CO2 Accuracy
T8100/T8300 - Single Channel
400-1250 ppm ±30 ppm or 3% of reading, whichever is greater*,**
1250-5000 ppm ±5% of reading + 30ppm *, **
T8200 - Dual Channel
75 ppm or 10% of reading (whichever is greater)
*Tolerance based on span gas of ±2%
** ABC Logic not deactivated
Power Supply Requirements
18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC, polarity protected

Page 4 Telaire Ventostat™ 8000 Series
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
T8100/T8300 - Single Channel
<2% of FS over life of sensor (15 years)
T8200 - Dual Channel
<5% of FS or <10% reading annual over life of sensor
(10 years)
Pressure Dependence
0.135% of reading per mm Hg
Certifications
CE and RoHS compliant
Signal Update
Every 5 seconds
CO2 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
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)
RH Sensing Element
Capacitive polymer sensor
RH Range
0% to 99% RH (non-condensing)
RH Accuracy (25°C)
±2.5% RH (20 to 80% RH)
±3.5% RH (<20% and >80% RH)
Active Temperature Accuracy
±0.8°C @ 22°C
Active Temperature Range
0 to 50°C
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 CO2such 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 (RLmaximum 500 :) available simultaneously for CO2
output
Digital to analog error ±1%
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
GE Sensing will repair Telaire product that fails to meet the terms
provided for in the Return and Warranty Policy Statement (See, http://
www.ge-mcs.com/en/services-and-support.html).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, GE Sensing will bear all product repair parts, labor,
and standard ground shipping charges.