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POL220 Series Economizer Controller
Product Description
The Economizer Controller allows the use of
unconditioned outside air to cool a building. The
Free Cooling air determination is based on customer
temperature and humidity selections, as well as
optional Demand Control Ventilation (DCV)
strategies with CO
level selection.
2
Features
•
Economizer control provides "free cooling"
based on single or dual dry bulb temperature, or
combination temperature + humidity sensors.
•
Wide temperature shut-off setpoint range
selection and Btu/lb selection range selectable
by DIP switches.
•
Potentiometers allow accurate adjustment of
DCV, exhaust fan levels, and minimum damper
position.
•
Versions with remote minimum position damper
adjustments accept either 0 to 10 Vdc or 135
Ohm potentiometer signals.
•
Used with Siemens OpenAir
•
Flexible sensor inputs accept 10K or 3K
standard NTC sensors, or Siemens QFM2160U
combination temperature/humidity 0 to 10V
sensor for enthalpy control.
•
LED Indication when in Free Cooling operation,
DCV operation and exhaust fan operation as
well as during sensor failure.
•
Quick installation and easy commissioning.
•
Two-stage cooling control.
•
Occupancy input with default capability.
•
Quick connect I/O with 1/4" spade connections.
•
Anti-freeze protection.
•
Brownout protection.
Product Numbers
Economizer
Economizer
Controller
Controller
Single
Multi-pack (20)
POL220.05
POL220.00
POL220.10
POL220.15
Item Number 125-1902, Rev. GA
®
damper actuators.
Remote
Potentiometer
Input Type
BSG61
(0-10 Vdc)
LVC2 (135Ω)
Contents
•
Economizer Controller
•
Two No. 6 3/4" self-tapping screws
Accessory
985-960 Jumper Accessory
Warning/Caution Notations
CAUTION/ATTENTION
Equipment damage or loss of data may
occur if you do not follow a procedure as
specified.
Risque de dégâts matériels ou de perte de
données, en cas de non-respect des
procédures à suivre.
WARNING/AVERTISSEMENT
Personal injury may occur if you do not
follow a procedure as specified.
Risque de blessures graves en cas de
non-respect des procédures à suivre.
Prerequisites
For proper Economizer Controller operation, read
this User Guide carefully, and follow the instructions
in the Economizer Controller Start-up/
Commissioning Mode section. Failure to do so may
result in damage to the product or create a
hazardous condition. Installation of this controller
must be performed by a trained HVAC service
technician.
User Guide
Document No. 125-1902
June 26, 2018
Page 1 of 16
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Summary of Contents for Siemens POL220 Series
- Page 1 CAUTION/ATTENTION • Flexible sensor inputs accept 10K or 3K Equipment damage or loss of data may standard NTC sensors, or Siemens QFM2160U occur if you do not follow a procedure as combination temperature/humidity 0 to 10V specified. sensor for enthalpy control.
- Page 2 NTC (QAM2030.010) or 3K NTC: 2-wire the elements and ultraviolet rays. (18, 20, or 22 AWG cable) connection. DCV (CO ) Sensor (QPA2000): 3- wire (18, 20, or 22 AWG cable) 0 to 10 Vdc control signal Page 2 of 16 Siemens Industry, Inc.
- Page 3 RAT, COM, and RAH terminals of the For differential dry bulb operation, use two device. QAM2030.010 (10K Type II NTC) or 3K NTC temperature sensors. Figure 4. QFM2160U Combination Temperature/Humidity Sensor Connections. Figure 2. 3K NTC Curve. Siemens Industry, Inc. Page 3 of 16...
- Page 4 Sensor in an area with unobstructed air circulation. See QPA…Series Economizer Controller Indoor Air Quality Room Sensors Installation 1. Connect the appropriate Siemens OpenAir Instructions (129-435). Damper Actuator to the controller actuator input as shown. 2. Connect the sensor to the IAQ and COM terminals of the controller.
- Page 5 To determine the minimum amount of outside air to bring in the building, use these basic guidelines: Siemens Industry, Inc. Page 5 of 16...
- Page 6 MA temperature sensors are used. • If the CO sensor has failed, the damper will be Set the DIP switch to DIFF (Differential) mode. controlled by the Free Cooling logic. See Figure 7. Page 6 of 16 Siemens Industry, Inc.
- Page 7 The Cool Stage 1 call from the Commercial Thermostat (Y1) energizes the CC1 input to the Economizer Controller. • The Cool Stage 2 call from the Commercial Thermostat (Y2) energizes the CC2 input to the Economizer Controller. Siemens Industry, Inc. Page 7 of 16...
- Page 8 DCV SET position is inappropriate Fast Red Blinking ̶ Brownout Red On Red On ̶ ̶ Failure to detect valid FC Sensor mix during Red On initialization Application Figure 12. Connected Economizer System Components Location Example. Page 8 of 16 Siemens Industry, Inc.
- Page 9 Document No. 125-1902 User Guide June 26, 2018 Wiring Guide Figure 13. Two-Stage Cooling System with Single Dry-Bulb Changeover Control Mode. Siemens Industry, Inc. Page 9 of 16...
- Page 10 Document No. 125-1902 User Guide June 26, 2018 Figure 14. Two-Stage Cooling System with Dual Dry-Bulb Changeover Control Mode. Page 10 of 16 Siemens Industry, Inc.
- Page 11 Document No. 125-1902 User Guide June 26, 2018 Figure 15. Two-Stage Cooling System with Single Enthalpy Changeover Control Mode. Siemens Industry, Inc. Page 11 of 16...
- Page 12 Document No. 125-1902 User Guide June 26, 2018 Figure 16. Two-Stage Cooling System with Dual Enthalpy Changeover Control Mode. Page 12 of 16 Siemens Industry, Inc.
- Page 13 User Guide June 26, 2018 Figure 17. Optional CO2 Sensor and Remote Potentiometer LVC2, 135 Ohm. Figure 18. Optional CO2 Sensor and Remote Potentiometer BSG61, 0 to 10 Vdc. The installation is now complete. Siemens Industry, Inc. Page 13 of 16...
- Page 14 24 Vac power supply; while checking the wiring of ┴ (or G0 or 24V- or COM) and ensure that they are all tied to another polar of 24 Vac power supply. Page 14 of 16 Siemens Industry, Inc.
- Page 15 Cooling will turn off. In Differential Enthalpy control mode, even though OA enthalpy is lower than RA enthalpy, if both OA and RA enthalpy exceed the high limit, Free Cooling will turn off. Siemens Industry, Inc. Page 15 of 16...
- Page 16 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. OpenAir is a registered trademark of Siemens Schweiz AG. Other products or company names mentioned herein may be the trademarks of their respective owners.