Document No. 125-1902
User Guide
June 26, 2018
Siemens Industry, Inc.
Page 3 of 16
Figure 1. Controller Mounted to Ductwork.
Outdoor, Return Air, and Mixed Air
Sensor Operating and Mounting
Instructions
Location and Mounting
The Economizer Controller accepts signals from
either the QAM2030.010 (10K, Type II) dry bulb
temperature sensor, or 3K NTC temperature sensor.
It provides single or differential temperature based
economizer control or the QFM2160U combination
temperature/humidity sensor for single or dual
enthalpy-based economizer control.
CAUTION/ATTENTION:
Do not mix sensors.
Temperature sensors must all be either
10K Ohm Type II NTC, or 3K NTC.
Ne mélangez pas de détecteurs.
Les détecteurs de température doivent
tous être l'un ou l'autre le Type II d'Ohm
de 10 Ko NTC, ou 3 Ko NTC.
For differential dry bulb operation, use two
QAM2030.010 (10K Type II NTC) or 3K NTC
temperature sensors.
Figure 2. 3K NTC Curve.
NOTE:
3K NTC sensors must follow this curve.
Sensor Mounting
1. Mount the sensor in any orientation, exposing it
to freely circulating air, using the two mounting
screws provided with the sensor. Choose a
location that protects it from rain, snow, and
direct sunlight.
2. Connect the appropriate Type II NTC 10K or 3K
sensor for:
o
Outside Air: Connect to the OAT and COM
terminals
of the device.
o
Return Air (Differential): Connect to the RAT
and COM terminals of the device.
o
Mixed Air: Connect to the MAT and COM
terminals of the device.
Figure 3. Type II NTC 10K or 3K Sensor Connections.
3. Connect the QFM2160U Combination
Temperature/Humidity sensor for Enthalpy
control.
o
Outside Air: Connect to the OAT, COM, and
OAH terminals of the device.
o
Return Air (Differential): Connect to the
RAT, COM, and RAH terminals of the
device.
Figure 4. QFM2160U Combination
Temperature/Humidity Sensor Connections.
