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I N S T A L L A T I O N 

 

V A N T A G E C O N T R O L S . C O M  

1061 South  800 East • Orem, Utah 84097 • Telephone 801 229 2800 • Fax 801  224 0355  

 

Vantage Thermostat Communication Station— MODEL: Q-ETS3 & STHERR101 

 

Overview 
The Q-ETS3, WireLink™ and the STHERR101, RadioLink® 
thermostat interface stations provide bi-directional 
communication between a Vantage control system and the 
HVAC system. Any button or time control using 

InFusion 

Design Center

 or 

QLink

 software can be programmed to 

change Setpoints, Operational Mode, Fan mode and 
Occupied/Unoccupied settings on a Vantage thermostat. 
Current set points, Indoor/Outdoor temperatures, Operational 
Mode, Fan mode and Occupied/Unoccupied (status) may be 
displayed on Vantage LCD TouchScreens. A Vantage Q-ETS3 
or STHERR101 station and a Vantage thermostat are used 
together, in a one-to-one ratio, to control HVAC systems.  
 
Please completely read, the 

Vantage Communicating 

Thermostat |Operating and Installation Manual

 in conjunction 

with this instruction sheet. Click on the manual below: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Or visit: 

http://dealer.vantagecontrols.com/

  

 
Note: Vantage Controls’ Thermostat is warranted for one year. 
This is in contrast with the 5 year warranty carried on most 
Vantage products. 
 
System Requirements 
Each Vantage thermostat requires one Q-ETS3 or STHERR101 
to interface with the Vantage Communicating Thermostat 
Part # 

STAT

 

 

Specifications 

Q-ETS3 

WireLink 

STHERR101 

RadioLink 

Dimensions HWD 

3” x 1” x 0.375” 

76mm x 25mm x 

10mm 

4.5” x 1.5” x 0.75” 

114mm x 38mm x 19mm

Weight 

0.8oz 

23g 

1.4oz 

40g 

Station Power 

connections* 

24V / 36V Station 

Bus 
and 

24Vac from 

thermostat base  

24Vac from thermostat 

base 

Station Count 

Design Center 

0.36W on IC-24 
0.54W on IC-36 

1 RadioLink Station 

Station Count 

QLink 

1 WireLink Station 

1 RadioLink Station 

Status LED 

Indicator 

Yes Yes 

Station Bus 
Wiring 

2C 16AWG, non-shield, <30pF per foot 
Station Bus should be separated a minimum 
of 18" from other parallel communication 
and/or high voltage runs. 

Ambient 

Operating 

Temperature 

32-95°F -or- 0-35°C 

Ambient 

Operating 

Humidity 

5-95% non-condensing 

 

*CAUTION:

 36V stations have a 

 symbol on the Serial 

Number sticker. Any Q-ETS3, not displaying this symbol, 
should not be connected to a 36Volt Station Bus. 
 
Software/Firmware 
Vantage’s Q-ETS3 & STHERR101thermostat interface stations 
are compatible with InFusion Design Center software and 
QLink software. NOTE: The 

Q-ETS3

 requires QLink version 2.50 

and Controller firmware version 5.70 or higher. The 

STHERR101

 

requires QLink version 4.0 - build 310 and Controller firmware 
version 7.4 or higher. For new projects it is recommended that 
firmware and software be kept to the most current release. 
 
Station Connection 
Installation of Vantage products should be performed or 
supervised by a 

Certified Vantage Installer. 

The Q-ETS3 

connects to the Vantage System Station Bus with the two 
black wires labeled Station Bus. The Station Bus wire should 
comply with the Vantage Station Bus wiring specification. The 
STHERR101 connects to the Vantage System via a RadioLink™ 
enabled system. 
 
Mounting the Q-ETS3 or STHERR101 
The Q-ETS3 or STHERR101 may be mounted behind the 
thermostat in a single gang box or may hang through a 1

¾

” 

(4.44cm) hole in the wall. The Black wire X1 and Green wire 
X2 attach to terminals labeled X1 & X2 of the thermostat sub 
base. The Red wire 24V attaches to the R terminal (screw 
terminals on right) of the thermostat sub base along with the 
24V power source. 

The Q ETS3 or STHERR101 do not supply 

power to the thermostat. 

 
Please see the 

Vantage Communicating Thermostat |Operating 

and Installation Manual

 for each of the following topics: 

 

 

Configuration, Q-ETS3, WireLink™ 

 

Configuration, STHERR101, RadioLink® 

 

Status LED Diagnostic Information for Q-ETS3 or 
STHERR101 

 

Thermostat Setup with InFusion 

 

Thermostat Setup with QLink 

 

External Sensors 

 

Temperature Averaging  

 
Globally Display Outdoor Sensor 
In 

Design Center

, click on 

Settings | Project Preferences | 

Thermostat

 and the Global Sensor drop down list. Select the 

thermostat that has the external sensor. In 

QLink

 Select 

Use as 

the Globally Displayed External Sensor

 from the Thermostat 

Station properties window. This will broadcast the value of the 
external sensor to all other thermostats connected to the 
Vantage System. If 

Use as the Globally Displayed External 

Sensor

 is not checked, 

other

 thermostats on the system will 

not display the outdoor temperature. 
 
Occupied (formerly Auto(Day)) and Unoccuped (formerly 
(Night)) Modes 
Most Thermostat Functions only work when the thermostat is 
in Occupied (formerly Auto(Day)) Mode. If the thermostat is in 
Unoccupied (formerly Manual(Night)) mode, the thermostat 
automatically changes to Occupied when a command is 
received. However, it is possible to end any task with a 
command to leave the thermostat in Occupied or Unoccupied 
modes as desired.  
 

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