Siemens POL220 Series, POL220.00, POL220.10, POL220.15, POL220.05 User Manual

User Guide

Document No. 125-1902

June 26, 2018

POL220 Series Economizer Controller

Page 1 of 16

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 CO2 level selection.

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® damper actuators.

• 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

Controller

Single

Economizer

Controller

Multi-pack (20)

Remote

Potentiometer

Input Type

POL220.05

POL220.00

BSG61
(0-10 Vdc)

POL220.10

POL220.15

LVC2 (135Ω)

Item Number 125-1902, Rev. GA

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.

Document No. 125-1902
User Guide
June 26, 2018

Page 2 of 16 Siemens Industry, Inc.

Basic Economizer Control Modes

1. Control Mode 1: Fixed Dry-bulb
(Single dry-bulb)
Outside air and mixed air temperature sensors
are used.

2. Control Mode 2: Differential Dry-bulb
(Dual Dry-Bulbs)
Outside air, return air, and mixed air
temperature sensors are used.

3. Control Mode 3: Combination Fixed Enthalpy
and Fixed Dry-bulb Control
Outside air temperature and humidity sensors,
and mixed air temperature sensors are used.

4. Control Mode 4: Combination of Differential
Enthalpy and Fixed Dry-bulb
Outside air temperature and humidity sensors,
return air temperature and humidity sensors,
and mixed air temperature sensors are used.

Specifications

Electrical Ratings:

Input Voltage: 24 Vac ±25%; 50/60 Hz (Class 2).
Nominal Power Consumption (at 24 Vac, 60 Hz):
4 VA.
Relay Contact Rating at 30 Vac (maximum power
from Class 2 input only): 1.5A run, 3.5A inrush.

NOTE:

All inputs and outputs must be 24 Vac Class 2.

Ambient Ratings:

Temperature: -40°F to 149°F (-40°C to 65°C).
Humidity: 5 to 95 percent RH (non-condensing).

Inputs:

Combination Temperature/Humidity Sensor
(QFM2160U): 5-wire (18, 20, or 22 AWG cable)
connection.

Dry Bulb Temperature Sensor 10K Ohm Type II
NTC (QAM2030.010) or 3K NTC: 2-wire
(18, 20, or 22 AWG cable) connection.

DCV (CO2) Sensor (QPA2000): 3- wire
(18, 20, or 22 AWG cable)
0 to 10 Vdc control signal

Outputs:

Actuator (GCA151.1P GMA151.1P, GQD151.1P):
4-wire (18 AWG)
Actuator Signal: 2 to 10 Vdc.
Actuator Input Resistance: 100K ohm.
The controller provides 7 VA max. to operate the
damper actuator.
Exhaust Fan: Contact closure.

Auxiliary Equipment:

• RDY2000 Commercial Thermostat

• LVC2 (135 Ω) Control Board for remote minimum

damper positioning (POL220.10 and POL220.15)

• BSG61 (0-10 Vdc) for remote minimum damper
positioning (POL220.00 and POL220.05)

Wire the electrical connections using 1/4” female,

insulated spade connections.

Approvals:

UL listed per UL873.
CE
RCM
cUL Listed per CSA – C22.2 No. 24

Suitable for plenum installation
UL/NEMA Type 1

Dimensions: 5.10” × 4.70” × 1.10”
(130 mm × 120 mm × 28 mm)

Weight: 0.49 lbs (221 g)

Required Tool

Phillips Screwdriver

Expected Installation Time

15 minutes

Installation

Mount the controller to sheet metal ductwork or a
panel using two self-tapping screws (provided). The
mounting location must protect the controller from
the elements and ultraviolet rays.

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.

Document No. 125-1902
User Guide
June 26, 2018

Page 4 of 16 Siemens Industry, Inc.

NOTE: QFM2160U Combination Temperature/

Humidity Sensors must be powered by an
external 24 Vac power supply.

CO2 Sensor – Demand Control
Ventilation (DCV)

1. Mount the QPA2000 CO2 Sensor in an area with
unobstructed air circulation. See QPA…Series

Indoor Air Quality Room Sensors Installation
Instructions (129-435).

2. Connect the sensor to the IAQ and COM
terminals of the controller. See Figure 4.

NOTE: CO2 sensors must be powered by an

external 24 Vac power supply.

Powering the Economizer
Controller

To power the Economizer Controller, connect a
24 Vac external power supply source.

Figure 5. Connecting to Power Supply Source.

Damper Actuator Connection to the
Economizer Controller

1. Connect the appropriate Siemens OpenAir
Damper Actuator to the controller actuator input
as shown.

2. Select the appropriate modulating (2 to 10 Vdc)
spring return damper actuator to operate the
Economizer damper. See Table 1.

Figure 6. Damper Actuator Connections.

Table 1. Damper Actuator Selection.

Damper Actuator

Part Number

Torque Rating

Description

GQD151.1P

20 lb-in

Spring Return, 2 to 10 Vdc Signal, Plenum-rated

GMA151.1P

62 lb-in

Spring Return, 2 to 10 Vdc Signal, Plenum-rated

GCA151.1P

160 lb-in

Spring Return, 2 to 10 Vdc Signal, Plenum-rated

Figure 7. Economizer Control Adjustments.

Document No. 125-1902

User Guide

June 26, 2018

Siemens Industry, Inc. Page 5 of 16

Economizer Controller
Startup/Commissioning Mode

Factory default settings:
All DIP switches are in the OFF (down position).

NOTE:

Use a small, flat-blade screwdriver to select DIP
switches. Ensure that the switches are fully in the
ON or OFF position.

All potentiometers are in the middle position (arrow
pointing upwards).

Initialization

1. Connect the sensor inputs and other auxiliary
equipment.

2. Use the DIP switch to select a 3K or 10K sensor
(see Figure 7).

3. Use the DIP switch to select Single (SNGL) or
Differential (DIFF) mode (see Figure 7).

4. Apply power to the controller (see Figure 5).

5. The controller will perform up to a 20-second
auto detection to determine the type of sensor
input(s).

If you experience a transient power failure during
initialization, the compressors will not suddenly
restart because the outputs are deactivated.

Commissioning Mode

This Commissioning mode (COMM) adjusts the
Minimum Position of the outside air damper. In the
Commissioning mode, the damper will be overridden
by Effective MIN POS, or DCV ACT, whichever is
greater.

Effective MIN POS is determined by either the
onboard MIN POS potentiometer or the Remote MIN
POS potentiometer:

Move the DIP switch on the bottom of the controller
to the COMM position (see Figure 7) to enter the
Commissioning mode. When the Free Cooling LED
and DCV LED blink red, this indicates that the
controller is in the Commissioning mode. CC1 and
CC2 are energized in the Commissioning mode, and
the exhaust fan responds to the outside air damper.

Determining Required Airflow

The Consulting Engineer defines the minimum
damper position by the minimum outdoor airflow
required in the building during the occupied period.
To determine the minimum amount of outside air to
bring in the building, use these basic guidelines:

• The OA rate can be calculated by this formula:

OA

% =

MAT−RAT

OAT−RAT

A minimum 10°F temperature differential
between OA and RA must be maintained;
otherwise, this formula doesn’t work well.

OR

• An airflow measuring station can be used to
directly tune the outdoor airflow volumetric rate
to designed value. OA rate can be calculated

from formula 𝑂𝐴% =

OAV

SAV

=

OAV

OAV+RAV

, where

minimum differential temperature between OA
and RA is not required.

Setting Minimum Position in Commissioning
Mode

If a Remote Positioning Potentiometer is being
used:

1. Turn the MIN POS potentiometer to the fully
closed, 0 position.

2. Turn the DCV ACT potentiometer to the fully
closed, 0 position

3. Adjust the Remote MIN POS Potentiometer until
the designed OA flow rate is met.

4. After the Remote MIN POS Potentiometer
adjustment is complete, turn the DCV ACT
potentiometer until designed DCV OA flow rate
is met. The DCV ACT setting should be greater
than the Remote MIN POS Potentiometer
setting.

5. When these adjustments are completed, set
the DIP switch to AUTO to resume normal
operation.

If the onboard MIN POS Potentiometer is being
used:

1. Turn the Remote MIN POS Potentiometer to the
fully closed, 0 position.

2. Turn the DCV ACT potentiometer to the fully
closed, 0 position,

3. Turn the MIN POS potentiometer until designed
OA flow rate is met.

4. After MIN POS adjustment is complete, turn the
DCV ACT potentiometer until designed DCV OA
flow rate is met. The DCV ACT should be
greater than MIN POS.

5. After all MIN POS and DCV ACT adjustments
are completed, set the DIP switch to AUTO to
resume normal operation.