Installation Instructions

Installation Instructions
Document No. 129-527
October 22, 2008
Outdoor Air Temperature Sensor
Item Number 129-527, Rev. BA Page 1 of 2
Product Description
Passive resistance and active output sensors with
plastic housing for acquiring outdoor air temperature
and to a lesser degree, solar radiation, the wind
effect and the temperature of the wall.
Product Number
Type Product
Number
Sensing Output Range of Use
Passive Resistance
QAC2012 Platinum 1K Ω,
385 alpha
-58°F to 158°F
(-50°C to 70°C)
QAC2030 NTC 10K Ω,
Type 2
-40°F to 158°F
(-40°C to 70°C)
Active Output
QAC3161 0 to 10 Vdc signal
[Platinum 1K Ω]
-58°F to 122°F
(-50°C to 50°C)
QAC3171 4 to 20 mA signal
[Platinum 1K Ω]
-58°F to 122°F
(-50°C to 50°C)
Required Tools
• Drill
• Screwdriver
• 3/16-inch mounting screws
Expected Installation Time
30 minutes
Installation
Depending on the use, the outdoor air temperature
sensor must be located as follows:
• For control:
The QAC31x1 units may be used as room
sensors where the normal conditions in the
room would be too harsh for a normal room
sensor (for example: animal labs, storage
facilities requiring periodic wash-downs, and
so on).
• For optimization:
Always on the coldest wall of the building
(normally the wall facing north). The sensor
must never be exposed to the morning sun.
Mounting Height
Mount the unit in the middle of the building, or
heating zone, and at least 8 feet (2.5 m) above the
ground.
Do not mount the sensor at the following locations:
• Above windows, doors, air exhausts or other
heat sources.
• Below balconies or eaves.
Mounting Notes
• To prevent measuring errors due to air
circulation, seal the cable conduit at the
sensor.
• Do not paint over the sensor.
• Mounting instructions are printed on the
packaging.
The installation is now complete.
Wiring Diagrams
Figure 1. Passive Resistance Elements
(QAC20xx).
Figure 2. Active Output Sensors (QAC31x1).