Telaire T8100NS, T8100NSP Operating Manual

Amphenol

Advanced Sensors

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.

2 3/4"

Telaire Ventostat™ T8100 NS and NSP Series

CO2 Sensor

User Instructions

1 3/16"

J2

UIP

OPTIONS

2

CO

5V-NC

10V-NO

J3

2

2

CO

CO

I

V

GND

OUTPUTS

678

Internal Label

STRIP GAUGE

COM

POT

2

3

6mm / ¼"

THERM

1

RMS

POWER

18 - 30 VAC

18 - 42 VDC

AC-/DC-/GND

< 2W PEAK

2

1

AC+/DC+

T63351-002
March 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
an independent thermistor with Night Setback Override Button. The

button shorts the thermistor when depressed.

Thermistor 10 KΩ Type II

and Night Setback Button

,

2

Slide potentiometer

T8100-NSP only

Left – 0 KΩ Right – 100 KΩ

(“ -“ common)

(“ -“ common)

(+)

18 - 30

VAC RMS

(+)

L1L2

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

sensor power supply and outputs, from

2

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.

,

CO2 4-20 mA out

Use either or both

CO2 output s

CO2 0 -10/5 V out

Jumper selectable

2

1

_

+

123876

Figure 2: T8100-NS/NSP Wiring for 3-Wire System,

AC Power

Thermistor 10 KΩ Type II

and Night Setback Button

Slide potentiometer

T8100-NSP only

Left – 0 KΩ; Right – 100 KΩ

CO2 4-20 mA out

Use either or both

CO2 output s

Common

(ground)

CO2 0 -10/5 V out

Jumper selectable

(+)

(“ -“ common)

(“ -“ common)

(+)

L1L2

18 - 30

VAC RMS

2

1

_

+

123876

Figure 3: T8100-NS/NSP Wiring for 4-Wire System,

AC Power

The T8100 Ventostats are either 3-wire or 4-wire type

Caution!

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.

AC+/DC+

12

AC-/DC-/GND

3

6712

8

THERM
COM
POT (T8100 NSP only)

I CO2

GND
V CO2

CO2 sensor

NS button

Thermistor

4 -20 mA

current sour ce

0 -10/ 0 – 5V

voltage source

Figure 1: T8100-NS/NSP Functional Block Diagram

Page 2 Telaire Ventostat™ T8100 NS and NSP Series