Carrier CRECOMZR113A00 Ultra Low Leak EconomizerONE Accessory Instruction Manual

Carrier CRECOMZR113A00 Ultra Low Leak EconomizerONE Accessory

Product Information

Specifications

• Product Name: Ultra Low Leak EconomizerONE Accessory Compatible with Medium Rooftop Units
• Capacity: 12.5 to 27.5 Tons
• Frequency: 50/60 Hz
• Part Numbers: CRECOMZR113A00 and CRECOMZR114A00

Product Usage Instructions

Safety Considerations

Installation of this accessory can be hazardous due to system pressures, electrical components, and equipment location (such as a roof or elevated structure). Only trained, qualified installers and service technicians should install, start-up, and service this equipment.

When installing this accessory, observe precautions in the literature, labels attached to the equipment, and any other safety precautions that apply:

• It is important to recognize safety information. This is the safety alert symbol: !. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.
• CAUTION: Failure to follow this caution may result in personal injury.
• Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses, and gloves when handling parts and servicing air conditioning equipment.
• The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

General

The Ultra Low Leak EconomizerONE Accessory is designed to be used with Medium Rooftop Units with a capacity range of 12.5 to 27.5 Tons and operates at a frequency of 50/60 Hz.

Economizer Installation

Vertical Installation

To install the economizer in a vertical orientation, follow these steps:

1. Ensure the unit is powered off and disconnected from the power source.
2. Locate a suitable mounting location for the economizer.
3. Mount the economizer using the provided mounting hardware and secure it firmly.
4. Connect the necessary wiring according to the wiring instructions provided.
5. Proceed to the Economizer Settings section for configuration instructions.

Horizontal Installation

To install the economizer in a horizontal orientation, follow these steps:

1. Ensure the unit is powered off and disconnected from the power source.
2. Locate a suitable mounting location for the economizer.
3. Mount the economizer using the provided mounting hardware and secure it firmly.
4. Connect the necessary wiring according to the wiring instructions provided.
5. Proceed to the Economizer Settings section for configuration instructions.

Barometric Hood Assembly

The barometric hood assembly is required for proper operation of the economizer. Follow these steps for installation:

1. Locate the barometric hood assembly in the package.
2. Attach the barometric hood assembly to the economizer using the provided screws.
3. Ensure the assembly is securely attached and properly aligned.

Vertical and Horizontal Applications

The economizer can be installed in both vertical and horizontal applications. Follow the respective installation instructions for the desired orientation.

Wiring Instructions

Proper wiring is crucial for the correct operation of the economizer. Follow these wiring instructions:

1. Refer to the provided wiring diagram for the specific model and follow the labeled connections.
2. Ensure all electrical connections are properly secured and insulated.
3. Double-check the wiring to ensure it matches the specifications and configuration requirements.

Installing Optional HH57LW001 Single Outside Air Enthalpy Sensor

If you wish to install the optional HH57LW001 Single Outside Air Enthalpy Sensor, follow these steps:

Enthalpy Control Sensor Configuration

1. Locate the HH57LW001 sensor in the package.
2. Mount the sensor in a suitable location according to the provided sensor installation instructions.
3. Connect the sensor to the economizer using the provided wiring and follow the wiring instructions.

California’s Title 24 High Temperature Limit Settings

If operating in an area that requires compliance with California’s Title 24 High Temperature Limit Settings, follow these guidelines:

• Refer to the specific regulations and requirements for compliance.
• Adjust the economizer settings accordingly to meet the high-temperature limit restrictions.

Economizer Settings

The economizer settings can be configured to meet specific requirements. Follow these instructions:

Interface Overview

The economizer interface provides access to various settings and functions. Familiarize yourself with the interface components:

• Display Screen: Shows the current status and settings.
• Buttons: Used for navigation and selection.
• Indicators: Provide visual feedback on system status.

Functions

The economizer offers various functions that can be adjusted according to your needs. These functions include:

• Cooling with EconomizerONE System
• Heating with EconomizerONE System

Mounting, Installation, and Wiring

Mounting the Economizer Controller Base Module

1. Locate a suitable mounting location for the economizer controller base module.
2. Mount the base module using the provided mounting hardware and secure it firmly.
3. Ensure the base module is level and properly aligned.

SAFETY CONSIDERATIONS

Installation of this accessory can be hazardous due to system pressures, electrical components, and equipment location (such as a roof or elevated structure). Only trained, qualified installers an d service technicians should install, start-up, and service this equipment. When installing this accessory, observe precautions in the literature, labels attached to the equipment, and any other safety precautions that apply:

• Follow all safety codes
• Wear safety glasses and work gloves
• Use care in handling and installing this accessory

It is important to recognize safety information. This is the safety alert symbol: When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions that will result in enhanced installation, reliability, or operation.

CAUTION

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care an d wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning equipment.

CAUTION

PERSONAL INJURY HAZARD

Failure to follow this caution can result in personal injury and damage to the unit. Cover the duct opening as a precaution so objects cannot fall into the return duct opening. Be sure to remove the cover when installation is complete.

DANGER

ELECTRICAL SHOCK HAZARD

Failure to follow this warning will result in personal injury or death. Before performing service or maintenance operations on unit, turn off main power switch to unit and install lock(s) and lockout tag(s). Ensure electrical service to rooftop unit agrees with voltage and amperage listed on the unit rating plate. Unit may have more than one power switch.

GENERAL

The EconomizerONE system utilizes the latest technology available for integrating the use of free cooling with mechanical cooling for packaged rooftop units. The solid-state control system optimizes energy consumption, zone comfort, an d equipment cycling by operating the compressors when the outdoor-air temperature is too warm, integrating outdoor air when the temperature is cool, and locking out the compressor when full free cooling is available. Demand control ventilation is also supported. This EconomizerONE system can be used with 1 or 2-speed fans. The EconomizerONE system utilizes gear-drive technology with a direct-mount spring return actuator that will close upon loss of power. The system comes standard with an outdoor air temperature sensor and a mixed air temperature sensor (also called a supply air temperature sensor). Outdoor single enthalpy, indoor (return) differential dry bulb or enthalpy, and CO2 sensors are available for field installation. Standard barometric relief dampers provide natural building pressurization control. An optional power exhaust system is available for applications requiring even greater exhaust capabilities. The power exhaust set point is adjustable at the EconomizerONE controller. See Table 1 for accessory usage information. See Table 2 for sensor usage. See Table 3 for package contents.

IMPORTANT: Read these instructions completely before attempting to install the accessory economizer.

Compliance

Economizers meet California Energy Commission Title 24- 2013/ 2016 prescriptive section 140.4 (damper leakage etc.), and mandatory section 120.2.i for Fault Detection and Diagnostic controls (HJW10). Economizers meet ASHRAE 90.1-2013/2016 damper leakage requirements as stated in Section 6.5.1.1.4 and Table 6.4.3.4.3, and meet 2016 Fault Detection and Diagnosis requirements in Section 6.4.3.12. Economizers meet IECC 2012 section C402.4.5.2 and IECC 2015 sections C403.2.4.3 and C403.3.3.5 for outside air and return air damper leakage require-ments, as well as IECC 2015 section C403.2.4.7 for Fault Detection and Diagnostic requirements.

NOTE: IECC 2015 section C403.2.4.7.1 requires a differential return air sensor, which must be ordered separately. Outside air and return air (volume) dampers are AMCA (Air Movement and Control Association International, Inc.) rated.

CRECOMZR113A00

| 48/50FC20-24
48/50GC17-20
50FCQ*17-24
582K/559K20-24
581K/551K17-20
547K17-24
RGV/RAV210-240
RGW/RAW181-210
RHV181-240

CRECOMZR114A00

| 48/50FC28-30
48/50GC24-28
50FCQ*28
582K/559K28-30
581K/551K24-28
547K28
RGV/RAV300-336
RGW/RAW240-300
RHV300

Table 2 — EconomizerONE Sensor Usage

APPLICATION

| EconomizerONE WITH OUTDOOR AIR DRY BULB SENSOR

(ACCESSORIES REQUIRED)

---|---

Outdoor Air Dry Bulb

| HH79NZ039 outdoor air dry bulb sensor is factory installed on the

economizer

Mixed Air Sensor

| HH79NZ039 provided with economizer and field installed in

blower compartment

Single Enthalpy| HH57LW001
Differential Dry Bulb Or Enthalpy| HH57LW001
CO 2 for DVC Control using a Wall-Mounted CO 2 Sensor| 33ZCSPTCO2LCD-01a or

33ZCSPTCO2-01a

CO 2 for DVC Control using a Duct-Mounted CO 2 Sensor| 33ZCSPTCO2LCD-01 or

33ZCSPTCO2-01 and 33ZCASPCO2b or CRCBDIOX005A00c

Wall Mount| 33ZCSPTCO2LCD-01 or

33ZCSPTCO2-01

Duct Mount

| 33ZCSPTCO2LCD-01 or

33ZCSPTCO2-01 and 33ZCASPCO2 or CRCBDIOX005A00

NOTE(S)

• a. 33ZCSPTCO2LCD-01 and 33ZCSPTCO2-01 are accessory CO2 sensors.
• b. 33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.
• c. CRCBIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2.

Table 3 — Package Contents

ECONOMIZER ACCESSORY KIT NUMBER|

QTY

|

DESCRIPTION

---|---|---

CRECOMZR113A00

|

1

| 50HE005486 Ultra Low Leak Economizer with HF23BL005 Actuator Motor and 50HE005489

Economizer Harness Plug

1| 50HE402667 Shroud Accessory

1

| Hardware Package contains one each of the following:

–  HH63LW001 POL 224 Economizer Controller

–  50HE006753 POL 224 Economizer Harness

–  HH79NZ039 Mixed Air Sensor

CRECOMZR114A00

|

1

| 50HE005486 Ultra Low Leak Economizer with HF23BL005 Actuator Motor and 50HE005489

Economizer Harness Plug

1| 50HE402667 Shroud Accessory

1

| Hardware Package contains one each of the following:

–  HH63LW001 POL 224 Economizer Controller

–  50HE006753 POL 224 Economizer Harness

–  HH79NZ039 Mixed Air Sensor

ECONOMIZER INSTALLATION

Figure 1 shows component locations on the EconomizerONE system.

Vertical Installation

These economizers are designed to work in both vertical and horizontal applications. These instructions are for vertical installations. For horizontal application,

1. Turn off the unit power supply and install the lockout tag.

2. Prepare the unit for economizer installation:

   • a. For units with a two-position damper installed, remove the outside air hood. Unplug the damper actuator and remove the assembly from the unit.
   • b. For units with manual damper installed, remove the manual damper and hood.

3. Remove the upper panel and bottom panel (provided with the RTU base unit) on the end of the unit to expose the return section. (See Fig. 2.) Save the screws and panels for future use if the economizer is ever removed from the unit.

4. Remove the unit’s left-side corner post and left-side panel to allow for easy economizer installation. (See Fig. 3.)

5. Install the economizer with the shroud attached, as shown in Fig. 3, into the return air section of the unit. Be careful not to pinch the wires during installation. The bottom of the economizer will rest on the base of the unit. (See Fig. 4.)

6. Reinstall the left-side corner post onto the unit.
   NOTE: The corner post will sit behind the economizer shroud flange (see Fig. 5). Screw through the corner post and through the economizer shroud. (See Fig. 4 and 5.)

7. Insert provided screw through the bottom left rear of the economizer and into the unit base. (See Fig. 5 and 6.) Reinstall the unit’s left side panel.

8. Before the economizer is secured in place on the right-hand side, remove and save the 12-pin jumper plug from the unit wiring harness. Insert the economizer plug into the unit wiring harness plug. (See Fig. 7.) NOTE: The 12-pin jumper plug should be saved for future use in the event that the EconomizerONE system is removed from the unit. The jumper plug is not needed as long as the EconomizerONE system is installed.

9. Install the bottom panel with the relief damper attached on the unit. (See Fig. 8.) Screw the panel in place.
   NOTE: Remove the bottom screw holding the relief blade closed.
   NOTE: Access to the economizer actuator is through the RTU base unit’s left- side panel.

10. Install the upper-end economizer panel over the econo-mizer’s outside air damper, above the bottom panel. Screw the panel in place, then screw the panel into the economizer in 2 places. (See Fig. 9.)

11. Locate the mixed (supply) air temperature sensor (HH79NZ039) in the economizer hardware bag. A 2-wire sensor harness with quick connects is supplied with the sensor. See Fig. 10 for sensor reference. Mount the sensor in the indoor fan section of the unit. (See Fig. 11.) Locate the orange and brown wires in the wire bundle in the indoor fan section and connect them to the wires from the HH79NZ039 sensor (brown to black and orange to red). Mixed air default setting is 53°F (11.6°C) and can be adjusted from 38° to 70°F (3.3°C to 21.1°C).

12. Assemble the outside air hood per Fig. 12-14.

    • a. Install filter supports (Item No. 1) to the upper-end panel using the screws provided.

    • b. Install each deflector (Item No. 8) onto each filter support (Item No. 1) using the screws provided. (See Fig. 12.)

    • c. Apply seal strip to mating flanges on side plates of hood (Items No. 4 and 5).

    • d. Secure side panels (Items No. 4 and 5) to the upper panel.

    • e. Apply the seal strip to the mating flange of the hood. (See Fig. 12.)

    • f. Secure the hood top (Item No. 3) to the upper panel using the screws provided.
      NOTE: On 44 in. chassis, remove the screws from across the top cover of the unit. The rear flange of the hood top will slide behind the unit top over the flange.

    • g. Secure side retainers (Item No. 6) to side panels (Item No. 4 and 5) using the screws provided, screwing from outside of the hood.

    • h. Secure each central retainer (Item No. 2) to the hood top (Item No. 3). Align central retainers to holes located on filter support (Item No. 1) such that the central retainer is perpendicular to the hood and each filter support. Secure using the screws provided.

    • i. Apply seal strip to top diverters (Item No. 7).

    • j. Secure top diverters (Item No. 7) to hood top (Item No. 3).

    • k. Install outdoor air screens by sliding them into each of the 4 spaces created by the hood (Item No. 3), filter support (Item No. 1), and central retainers (Item No. 2). First insert the air screen into the pocket created at the end of the hood. Then put the air screen completely into place and slide it back into the pocket created in the filter support.

    • NOTE: Repeat for each air screen. See Fig. 13 for the completed hood assembly.

13. Install the hood assembly on the unit. (See Fig. 14.)

14. Install the hood screens and other approved EconomizerONE accessories.

Horizontal Installation

These economizers are designed to work in both vertical and horizontal applications. These instructions are for horizontal applications. For vertical installation, refer to page 3. The unit has a horizontal duct opening next to the horizontal supply duct opening. However, in this application, with an economizer, the horizontal duct will actually come into the unit underneath the outdoor air hood. (See Fig. 15.)

DUCT OPENING INSTALLATION

1. Turn off unit power supply and install the lockout tag.

2. Prepare the unit for economizer installation:

   • a. For units with a two-position damper installed, remove the outside air hood. Unplug the damper actuator and remove the assembly from the unit.
   • b. For units with manual damper installed, remove the manual damper and hood.

3. Remove the upper panel and bottom panel (provided with the RTU base unit) on the end of the unit to expose the return section. (Refer to Fig. 2.) Save the screws and panels for future use if the economizer is ever removed from the unit.

4. Remove left side corner post and left side panel from the unit to allow for easy economizer installation. (See Fig. 16.) NOTE: The unit’s left side panel has a duct opening in it, but this panel/duct opening will not be used in this application and can be discarded.

5. Install the economizer with the shroud attached, as shown in Fig. 3, into the return air section of the unit. Be careful not to pinch the wires during installation. The bottom of the economizer will rest on the base of the unit. (Refer to Fig. 4.)

6. Reinstall the left-side corner post on the unit.
   NOTE: The corner post will sit behind the economizer shroud flange. Screw through the corner post and through the economizer shroud. (Refer to Fig. 5 and 6.)

7. Insert provided screw through the bottom left rear of the economizer and into the unit base. (Refer to Fig. 4). Install the new (provided) left side panel without the duct opening on the unit.

8. Before the economizer is secured in place on the right-hand side, remove and save the 12-pin jumper plug from the unit wiring harness. Insert the economizer plug into the unit wiring harness plug. (Refer to Fig.7.)
   NOTE: The 12-pin jumper plug should be saved for future use in the event that the EconomizerONE system is removed from the unit. The jumper plug is not needed as long as the EconomizerONE system is installed.

9. Install the bottom panel (provided) with the horizontal return duct opening on the unit (see Fig. 15 and 17). Screw the panel into place.

10. Install the upper-end economizer panel over the economizer’s outside air damper, and above the bottom panel. Screw the panel in place, then screw the panel into the economizer in 2 places. (See Fig. 17.)

11. Locate the mixed (supply) air temperature sensor (HH79NZ039) in the economizer hardware bag. A 2-wire sensor harness with spade terminals is supplied with the sen-sor. Plug the harness into the top of the HH79NZ039 sensor. Mount the sensor in the indoor fan section of the unit. Locate the orange and brown wires in the wire bundle in the indoor fan section. Connect these orange and brown wires to the 2-wire harness attached to the HH79NZ039 sensor. Mixed air default setting is 53°F (11.6°C) and can be adjusted from 38°F to 70°F (3.3°C to 21.1°C).

12. Assemble the outside air hood (refer to Fig. 12 and 13).

    • a. Install 4 hood angles to the upper end panel using the screws provided.
    • b. Apply seal strip to mating flanges on the side plates of the hood and the hood top.
    • c. Secure the hood side plates to the panel using screw s provided.
    • d. CRECOMZR113A00: Remove screws across top cover. Attach hood top to hood side plates. (Flange will slide behind flange of top cover.) Reinstall the screws previ-ously removed. CRECOMZR114A00: Secure top flange using the screws provided in the kit.
    • e. Install the 4 outdoor air screens by sliding then into the channel formed by the 4 angles installed previously. Make sure the screens extend across the entire length of the hood.
    • f. Install the side filter supports using the provided screws.
    • g. Install the side drip edge angles using the provided screws.
    • h. Run a continuous length of seal strip across the hood, covering the engagement hole in the lower hood.
    • i. Install the top diverter using the provided screws.

13. Install the hood assembly onto the unit. (Refer to Fig. 14.)

14. If barometric relief is required, then remove the relief damper and hinges from the (provided) bottom panel used on vertical applications. Reinstall the hinges and damper on the side of the field supplied return duct.
    NOTE: A relief hood for the horizontal application can be ordered separately (part number CRBARHOD001A00) or can be field supplied.

15. Install the hood screens and other approved Economizer ONE accessories.

Barometric Hood Assembly

The barometric hood can be assembled in a vertical or horizontal configuration. Figure 18 illustrates the barometric hood parts.

BAROMETRIC HOOD (VERTICAL CONFIGURATION)

1. Remove the hood top panel from its shipping position on the unit end. (See Fig. 19.)
2. Remove the side panels located in the hood parts box. (See Fig. 20.)
3. Install parts as shown in the exploded view shown in Fig. 21, using the seal strip and screws provided in the parts box. Figure 22 illustrates the installed barometric hood parts.

BAROMETRIC HOOD (HORIZONTAL CONFIGURATION)

For horizontal return and field-installed economizer, install the economizer as follows:

1. Install the field-provided horizontal ductwork onto the unit. Duct height must be at least 19-1/2 in. high. However, the duct can be no taller than the top of the relief opening in the bottom panel, or airflow into the outside air hood will be restricted. (See Fig. 23.)

2. Cut a 16 in. x 36 in. opening in the return duct for the relief damper. (See Fig. 23.)

3. On field-installed economizers, a bird screen or hardware cloth is shipped, attached to the bottom panel used for vertical applications.
   NOTE: This panel is not used for horizontal return applications. Remove the screen from the provided panel and install it over the relief opening cut in the return duct.

4. Using the blade brackets, install the relief damper onto the side of the return duct. (See Fig. 24.) The 2 brackets and relief damper are provided with the economizer.

5. Using the provided hardware, screw the CRBARHOD001A00 hood sides and top together. (See Fig. 25.)
   Caulk the back side of the mating flanges to ensure a water-tight seal. Install the CRBARHOD001A00 over the relief damper and screw to the return duct, as illustrated in Fig. 24 and 26.

Vertical and Horizontal Applications And Wiring Instructions

Vertical and Horizontal Applications

1. The POL 224 EconomizerONE controller is shipped mounted to a bracket. Install the controller/bracket in the unit control box as shown in the wiring diagram. Screw in place through pre-punched holes.
2. For 1 and 2-speed units, connect the plugs coming from the controller as shown in Fig. 27 and 28.

Wiring Instructions

1. Install POL 224 controller (with harnesses attached) in unit top left of the control box. See Fig. 28 for the unit wiring diagram.
2. Mount supply air temperature (SAT) sensor, with 2 wire SA T harness attached, in the indoor blower section. (Refer to Fig. 11.)
3. Unplug the 12-pin plug from the ECON terminal on the Unit Control Board (UCB). The 12-pin plug is shown in Fig. 27.
4. Attach the 12-pin plug that was disconnected from the UCB to the 12-pin plug ECON-A harness from the POL 224 controller.
5. Connect the other 12-pin plug from the POL 224 (ECON) controller to the ECON terminals on the UCB. (See Fig. 27.)
6. Connect the brown and red wires from the controller harness to the UCB. (See Fig. 28 for location.)
7. Inside the control box section, locate the pink and violet wires from the PL6 harness and connect them to the violet and pink wires from the controller harness. (See Fig. 28.)

INSTALLING OPTIONAL HH57LW001 SINGLE OUTSIDE AIR ENTHALPY SENSOR

When using the HH57LW001 enthalpy sensor (see Fig. 31) fo the outside air changeover, the existing HH79NZ039 dry bulb sensor (refer to Fig. 10) must be removed. The enthalpy sensor will be mounted in the same location as the dry bulb sensor (refer to Fig. 1). When the enthalpy sensor’s OA (Outside Air) temperature, enthalpy, and dew point are below their respective set points, outside air can be used for free-cooling. When any of these are above their set point, free cooling will not be available. Enthalpy set points are configurable and create an enthalpy boundary according to the user’s input. For additional details, see Fig. 29-30 and Table 4. Harness 48TC005213 is required to be connected between the EconomizerONE harness in the return air chamber. Harness 48TC005213 has a 5-pin plug that connects directly to the HH57LW001 enthalpy sensor.

Enthalpy Control Sensor Configuration

The optional enthalpy control sensor (P/N: HH57LW001) communicates with the POL 224 economizer controller using g the 5-wire harness, 48TC005213. The HH57LW001 sensor can be used as a single outside air enthalpy, a differential return enthalpy, or a differential return temperature sensor. Refer to Fig. 28 for wiring the HH57LW001 enthalpy sensor for each option. See Fig. 31 and Table 6 on page 14 to locate the wiring terminals for each enthalpy control sensor.

Table 4 — Enthalpy Manual Entry Set Points for EconomizerONE Per Climate Zone

CLIMATE ZONES a| 2 TEMP OFF| LOWEST SETTING| RH%| 2 ENTH OFF| RH%| 2THL| 2EHL| RH%
---|---|---|---|---|---|---|---|---
1| 65°F| 22 Btu/lbm| 43%| 28 Btu/lbm| 86%| 83°F| 33 Btu/lbm| 48%
2| 65°F| 22 Btu/lbm| 43%| 28 Btu/lbm| 86%| 83°F| 33 Btu/lbm| 48%
3| 65°F| 22 Btu/lbm| 43%| 28 Btu/lbm| 86%| 83°F| 33 Btu/lbm| 48%
4| 65°F| 22 Btu/lbm| 43%| 28 Btu/lbm| 86%| 83°F| 33 Btu/lbm| 48%
5| 70°F| 22 Btu/lbm| 28%| 28 Btu/lbm| 65%| 83°F| 33 Btu/lbm| 48%
6| 70°F| 22 Btu/lbm| 28%| 28 Btu/lbm| 65%| 83°F| 33 Btu/lbm| 48%
7 and 8| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
CALIFORNIA TITLE 24 ZONES b| 2 TEMP OFF| LOWEST SETTING| RH%| 2 ENTH OFF| RH%| 2THL| 2EHL| RH%
1| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
2| 73°F| 22 Btu/lbm| 22%| 28 Btu/lbm| 55%| 83°F| 33 Btu/lbm| 48%
3| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 55%| 83°F| 33 Btu/lbm| 48%
4| 73°F| 22 Btu/lbm| 22%| 28 Btu/lbm| 55%| 83°F| 33 Btu/lbm| 48%
5| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
6| 71°F| 22 Btu/lbm| 28%| 28 Btu/lbm| 62%| 83°F| 33 Btu/lbm| 48%
7| 69°F| 22 Btu/lbm| 32%| 28 Btu/lbm| 68%| 83°F| 33 Btu/lbm| 48%
8| 71°F| 22 Btu/lbm| 28%| 28 Btu/lbm| 62%| 83°F| 33 Btu/lbm| 48%
9| 71°F| 22 Btu/lbm| 28%| 28 Btu/lbm| 62%| 83°F| 33 Btu/lbm| 48%
10| 73°F| 22 Btu/lbm| 22%| 28 Btu/lbm| 55%| 83°F| 33 Btu/lbm| 48%
11| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
12| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
13| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
14| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
15| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
16| 75°F| 22 Btu/lbm| 19%| 28 Btu/lbm| 50%| 83°F| 33 Btu/lbm| 48%
CONTROLLER DEFAULT SETTINGS| 2 TEMP OFF| —| —| 2 ENTH OFF| —| 2THL| 2EHL| RH%
DEFAULT SET POINTS| 63°F| —| —| 28 Btu/lbm| 94%| 83°F| 33 Btu/lbm| 48%

NOTE(S):

• a. Refer to Fig. 30 for a map of U.S. and Canada climate zones.
• b. Refer to Fig. 29 for a map of California Title 24 zones

Economizers are shipped standard with an HH79NZ039 outside air dry bulb sensor (refer to Fig. 10). System default setting (high temp limit) is 63°F (17°C) and has a range of 48°F to 80°F (9°C to 27°C). Sensor is factory installed on economizer.

NOTE: A second HH79NZ039 sensor is provided for mixed air temperature.
NOTE: California’s high-temperature setting requirements by region are shown in Table 5.

ENTHALPY SETTINGS (ENTHALPY OPTION)

If installing the optional HH57LW001 enthalpy sensor, then the HH79NZ039 dry bulb outside air sensor must first be removed. Wire sensor to harness 48TC005213 and the (5) wires from the harness to the EconomizerONE harness in the return air chamber. Harness 48TC005213 has a 5-pin plug that connects directly to the HH57LW001 enthalpy sensor. Refer to Fig. 28 for wiring connec- tions. See Fig. 31 and Table 6.

California’s Title 24 High Temperature Limit Settings

California’s Title 24 code requires a high-temperature limit setting for all dry bulb outside air economizer changeover. The temperatures vary by the region within California. See Table 5 for high-limit settings.

Table 5 — California Title 24 Regional High Limit Dry Bulb Temperature Settings

DEVICE TYPE b

| CLIMATE ZONES| REQUIRED HIGH-LIMIT DESCRIPTION

(ECONOMIZER OFF WHEN)

---|---|---

FIXED DRY BULB

| 1, 3, 5, 11-16| OAT exceeds 75°F (23.8°C)
2, 4, 10| OAT exceeds 73°F (22.7°C)
6, 8, 9| OAT exceeds 71°F (21.6°C)
7| OAT exceeds 69°F (20.5°C)

DIFFERENTIAL DRY BULB

| 1, 3, 5, 11-16| OAT exceeds RA temperature
2, 4, 10| OAT exceeds return air temperature

–2°F (–18.8°C)

6, 8, 9| OAT exceeds return air temperature

–4°F (–20°C)

7| OAT exceeds return air temperature

–6°F (–21.1°C)

FIXED ENTHALPY c

+ FIXED DRY BULB

| ****

All

| ****

OAT exceeds 28 Btu/lb of dry air or OAT exceeds 75°F (23.8°C)

NOTE(S):

• a. This table is sourced from 2019 California Energy Code, Title 24, Part 6, Table 140.4-E Air Economizer High Limit Shut Off Control Requirements.
• b. Only the high-limit control devices listed are allowed to be used and at the set points listed. Others, such as Dew Point, Fixed Enthalpy, Electronic Enthalpy, and Differential Enthalpy Controls, may not be used in any climate zone for compliance with Section 140.4(e)1 unless approval for use is provided by the Energy Commission Executive Director.
• c. At altitudes substantially different than sea level, the Fixed Enthalpy limit value shall be set to the enthalpy value at 75°F and 50% relative humidity. As an example, at an approximately 6,000 foot elevation, the fixed enthalpy limit is approxi-mately 30.7 Btu/lb.

LEGEND

• OAT — Outdoor-Air Thermostat
• RA — Return Air

Table 6 — HH57LW001 Sensor Wiring Terminations

ECONOMIZER SETTINGS

Interface Overview

ECONOMIZERONE

The field-installed accessory consists of the following:

• Ultra Low Leak Economizer Assembly
• HH79NZ039 OA Dry Bulb Sensor
• HH79NZ039 Mixed Air Sensor
• POL 224 Controller
• 50HE005489 Harness

POL 224 ECONOMIZER MODULE WIRING

The economizer controller used on electromechanical units is a Siemens POL 224, which is to be located in the RTU base unit’s control box. See Fig. 33 for a button description for the POL 224 controller. See the installation instruction for the base unit location of the control box access panel. (See Fig. 32.)

The POL 224 controller provides the following:

1. One-line LCD — After a period of inactivity, the controller displays the default HMI screen (free cooling status, 1FREE-COOL YES, or 1FREE COOL NO). See Fig. 33-37.
2. Operation button (Up button) — Move to the previous value, step, or category.
3. Operation button (Down button) — Move to the next value, step, or category.
4. Operation button (Enter button):
   • a. Press Enter to edit the current value or option.
   • b. Press Enter to confirm a newly selected value or option.
   • c. Press Enter + Up to jump up one entire category.
5. Press Enter + Down to jump down one entire category.

User Interface and Keypad
The controller user interface consists of an LCD display and a 3-button keypad for input. The LCD is a 16-character by 1-line dot matrix display. The keypad is used to navigate and change the de-sired menu items on the display. See Fig. 33.
The Climatix™1 mobile application allows for installation, commissioning, and servicing. Scanning a QR code on the controller allows users to download the mobile application on Android™1 or Apple iOS®1, but a Wi-Fi/WLAN stick is needed. See Fig. 33 and 34. Plug Wi-Fi/WLAN stick into controller USB port for temporary connection for mobile application setup. Each Wi-Fi/WLAN stick can be used for multiple units.
Menu Structure
Menus are displayed in the economizer controller via categories. There are eight first-level menus, each of which is represented by a number at the beginning of the line on the LCD. Pressing Enter + Up or Down can toggle between different first-level menus. Submenus follow the numbered first-level menus closely. Pressing Up or Down can toggle between different submenus.
At the end of the line, the LCD displays the value of the current submenu (if any). If the value is editable, then pressing Enter will put the terminal in Edit mode. The value is then highlighted for change. After making a change by pressing Up or Down, press Enter to confirm the change and exit the Edit mode. See Fig. 36.
Powering the Economizer Controller
Connect a 24 vac external power supply source to the power terminals for the economizer controller. See Fig. 35 for a detailed view. See also terminals 29 and 30 on Fig. 39.
LED Indication
NOTE: If different faulty events occur at the same time, then the sensor/DAC LED lights up following this priority: Red –> Yellow –> Off. For example, if there is a humidity sensor error and air temperature failure at the same time, then the sensoLED turns red rather than yellow. See Fig. 37 and Table 7.

IMPORTANT: After the economizer controller enters the running state, it may take one minute for peripheral devices to complete initialization. Before that, LED indication might be unstable.

1. Third-party trademarks and logos are the property of their respective owners.

3

| One-line LCD. After a period of inactivity, the controller displays the default

HMI screen (free cooling status, 1FREECOOL YES or 1FREECOOL NO)

4| Operation button (Up button) — Move to the previous value, step, or category
5| Operation button (Down button) — Move to the next value, step, or category

6

| Operation button (Enter button):

•      Press to edit the current value or option.

•      Press to confirm a newly selected value or option.

•      Press Enter + Up to jump up one entire category.

•      Press Enter + Down to jump down one entire category.

numbers represent different menus:

1: Status Display

2: Basic Settings

3: Advanced Settings

4: Alarms

5: Enter Configuration State and Reset 6: I/O Config

7: Testing

8: Enter Running State

2| Submenu
3| Value of the current submenu

• See Setup and Configuration on page 31 for detailed submenus, together with possible values or ranges.

Table 7 — LED Indication

STATUS

| FREE COOLING LED| SENSOR LED| ****

DAC LED

---|---|---|---
Commissioning mode| Yellow Blinking| Yellow Blinking| Yellow Blinking
Power start-up| Yellow On| Yellow On| Yellow On
Free cooling is running| Green On| —| —
Free cooling is available but not running| Green Blinking| —| —
Not economizing when it should| Red Blinking| —| —
Economizing when it should not| Red On| —| —
Sensor working okay| —| Green On| —
Humidity sensor error| —| Yellow On| —
CO 2 sensor error| —| LED Off| —
Air temperature fault/failure| —| Red On| —
Excess outdoor air| —| Red Blinking| —
Damper working okay| —| —| Green On
Damper not modulating| —| —| Red On
Damper slippage| —| —| Red Blinking
Damper unplugged| —| —| Fast Red Blinking
Terminal ACT-FB is configured but no available

feedback signal

| ****

—

| ****

—

| ****

LED Off

Functions

FREE COOLING ECONOMIZING

Free cooling uses unconditioned outside air to cool the space directly. The economizer controller enables or disables free cooling after it judges which control mode is active. It also uses hysteresis to ensure a smooth switchover. Depending on the sensors that are used, there are 4 different control modes. In different control modes, the assessed conditions are different. See Table 8.

Table 8 — Free Cooling Functions

Control Mode 1

•      Fixed Dry Bulb

| OA (Outside Air) temperature sensor and

MA (Mixed Air) temperature sensor

| The outside air dry bulb temperature is compared with the set temperature shutoff set point.

If the outside air dry bulb temperature is below the temperature shutoff set point, then the outside air is used to meet all or part of the cooling demand.

Control Mode 2

•      Differential Dry Bulb (Dual Dry Bulbs)

| ****

OA temperature sensor, RA (Return Air) temperature sensor, and MA temperature sensor

| The outside air dry bulb temperature is compared with the return air dry bulb temperature.

If both OAT and RAT are higher than the temperature high limitation, then free cooling is prohibited.

If OAT or RAT is lower than the temperature high limitation and the outside air dry bulb temperature is lower than the return air dry bulb temperature,

then the outside air is used to meet all or part of the cooling demand.

Control Mode 3

•      Combination Fixed Enthalpy and Fixed Dry Bulb Control

| ****

OA temperature and humidity sensor and MA temperature sensor

| The outside air dry bulb temperature and enthalpy are compared with the set temperature and enthalpy shutoff set points.

If the outside air enthalpy is lower than the set enthalpy shutoff set point, and the outside air dry bulb temperature is lower than the temperature shutoff set point, then the outside air can be used for economizing.

Control Mode 4

•      Combination of Differential Enthalpy and Fixed Dry Bulb

| ****

OA temperature and humidity sensor, RA temperature and humidity sensor,

and MA temperature sensor

| The outside air dry bulb temperature and enthalpy are compared with the temperature shutoff set point and return air enthalpy.

If both OA enthalpy and RA enthalpy are higher than the enthalpy high limitation, then free cooling is prohibited.

If OA enthalpy or RA enthalpy is lower than the enthalpy high limitation, outside air enthalpy is lower than the return-air enthalpy, and the outside air dry bulb temperature is lower than the set temperature shutoff set point,

then outside air can be used for economizing.

DEFAULT HYSTERESIS SETTING

The hysteresis setting (DB) defaults to 2°F (–16.6°C). See Fig. 38.

DAMPER MODULATION DURING FREE COOLING

Once outside air is suitable for free cooling, the controller modulates the damper based on MAT (mixed air temperature, default) or OAT (outside air temperature). See Table 8. If MAT is used when free cooling is enabled, then MAT set point (3MAT SET, configurable in Parameter Settings — Advanced —see page 29) is used for MAT modulating. When MAT falls below the anti-freeze set point (3FRZ PROT), the damper either fully closes or opens to the minimum position (configurable in Parameter Settings — Advanced — see page 29).

1. If MAT is lower than MAT set point, then the damper is modulated to maintain MAT set point, toward fully closed or open to the minimum position based on occupancy status if MA T continues dropping.
2. If MAT is in the range [MAT set point, (MAT set point + neutral zone band [1°F (17.2°C) by default])], then the damper position does not change.
3. If MAT is higher than (MAT set point + neutral zone band), then the damper modulates toward fully open.
4. If MAT is 10°F (5.5°C) higher than MAT set point, then the damper fully opens to 100%.

If OAT is used when there is a cooling demand, then the damper can be opened to different positions depending on different outside air temperatures:

1. If outside air is higher than 50°F (10°C) but lower than the temperature shutoff set point, then the damper is fully open.
2. If outside air is higher than the OAT lockout set point but lower than 50°F (10°C), then linear modulation is applied when only Cooling Stage 1 Input (Y1I) is ON. Results of the following formula indicate the damper’s open position: ([OAT – OAT Lockout Set Point] / [50 – OAT Lockout Set Point]) * (80% – MIN POS) + MIN POS
   NOTE: When both free cooling and mechanical cooling are on, the damper remains fully open regardless of the modulating logic.

LOCATION-BASED SHUTOFF SET POINTS

The economizer controller can get a location-based temperature and enthalpy shutoff set points automatically if it is connected to the Climatix™ mobile application. Once a Wi-Fi/WLAN stick is plugged in, the economizer controller can establish a network con-nection with the mobile application. The temperature and enthalpy shutoff set points obtained via the phone or tablet’s GPS functionality can then be synchronized to the economizer controller.

COOLING STAGE OPERATION

The economizer controller accepts inputs for 1, 2, and 3-stag e cooling inputs, and reroutes to the RTU through the relay connection Y1, Y2 and AUX1/AUX2. The operation of the cooling stages is determined by the availability of Free Cooling provided by the economizer operation mode. See Cooling Stage I/O Logic tables, Tables 9-10. Based on the use of Free Cooling, the operating modes are as follows:

• Y1 is Stage 1 Cooling Demand
• Y2 is Stage 2 Cooling Demand
• Y3 is Stage 3 Cooling Demand
• Free Cooling is always the first cooling stage
• Cooling Stage 1 call from the Commercial Thermostat (Y1) energizes the Y1 input to the Economizer Controller
• Cooling Stage 2 call from the Commercial Thermostat (Y2) energizes the Y2 input to the Economizer Controller
• Cooling Stage 3 call from the Commercial Thermostat energizes the AUX1/AUX2 input to the Economizer Controller

Table 9 — 1 and 2-Stage Cooling Stage I/O Logic

ECONOMIZER CONDITION MET| Y1| Y2| COOLING STAGE 1| COOLING STAGE 2
---|---|---|---|---
NO| On| On| On| On
NO| On| Off| On| Off
NO| Off| Off| Off| Off
YES| On| On| On| On/Offa
YES| On| Off| Off| Off
YES| Off| Off| Off| Off

NOTE(S):

a. If OAT ≤ MAT set point (3MAT SET), then Relay 2 is always OFF to disable Cooling Stage 2. Otherwise, if both stages of cooling (Y1 and Y2) are ON for more than a set time (15 minutes by default), Y2 remains ON, and the OAT is higher than the MAT set point, then Relay 2 energizes to allow Y2 pass-through t o enable Cooling Stage 2. To change the set time, configure 3STG3 DLY as desired. See “Parameter Settings — Advanced” on page 29 for more 3STG3 DLY details.

Table 10 — 2 and 3-Stage Cooling Stage I/O Logic

ECONOMIZER CONDITION MET| ****

Y1

| ****

Y2

| ****

Y3

| COOLING STAGE 1| COOLING STAGE 2| COOLING STAGE 3
---|---|---|---|---|---|---
NO| On| On| On| On| On| On
NO| On| On| Off| On| On| Off
NO| On| Off| Off| On| Off| Off
NO| Off| Off| Off| Off| Off| Off
YES| On| On| On| On| On| On/Offa
YES| On| On| Off| On| On/Off| Off
YES| On| Off| Off| Off| Off| Off
YES| Off| Off| Off| Off| Off| Off

NOTE(S):

• a. If OAT ≤ MAT set point (3MAT SET), then Relay 3 is always OFF to disable Cooling Stage 3. Otherwise, if all cooling stages (Y1, Y2 and Y3) are ON for more than a set time (15 minutes by default), Y3 remains ON, and the OAT is higher than the MA T set point, then Relay 3 energizes to allow AUX1/AUX2 pass-through to enable  Cooling Stage 3. To change the set time, configure 3STG3 DLY as desired. See “Parameter Settings — Advanced” on page 29 for more 3STG3 DLY details.

IMPORTANT: The Economizer Controller can tolerate thermo-stat wiring mismatch, e.g., Thermostat Y1 –> Economizer Y2-IN, Thermostat Y2 –> Economizer Y1-IN. The handling logic is Stage =Y1I + Y2I + Y3I. For example, Y1O =1 if Stage > =1, Y2O =1 if Stage > = 2, Y3O=1 if Stage=3.

MULTI-SPEED FAN SUPPORT

The Economizer Controller supports connection to 1 and 2-speed fans. When the unit is equipped with a multi-speed fan, the damp-er responds to multiple fan speeds via multiple minimum positions (MIN POS) to keep minimum airflow. See Tables 11-13.

Table 11 — Damper MIN POS for 2-Speed Fana

Y1| Y2| W1 or O/B| Spd L| Spd H| Pos L| Pos H
---|---|---|---|---|---|---
X| —| —| X| —| X| —
X| X| —| —| X| —| X
—| —| X| —| X| —| X

NOTE(S):

a. A multi-speed fan is not controlled by the economizer controller but by an external logic board.

LEGEND

• Pos L — Damper MIN POS for Low-Speed Fan
• Pos H — Damper MIN POS for High-Speed Fan
• Spd L — Low Speed (Fan)
• Spd H — High Speed (Fan)

Table 12 — Different Fan Speeds with Different Configured Outputsa

FAN TYPE| 1-SPEED COOLING b| 2-STAGE COOLING b| 3-STAGE COOLING b
---|---|---|---

1-SPEED FAN c

| •      Spd H (regardless of cooling demand,

OCC=Yes)

| •      Spd H (regardless of cooling demand,

OCC=Yes)

| •      Spd H (regardless of cooling demand, OCC=Yes)

2-SPEED FAN c

| •      Spd L

(0 or 1 cooling demand)

•      Spd H

(2 cooling demands)

| •      Spd L

(0 or 1 cooling demand)

•      Spd H3) (2 cooling

demands)

| •      Spd L

(0 or 1 cooling demand)

•        Spd H

(2 or 3 cooling demands)

NOTE(S):

• a. If a single-speed fan connects to the controller, then it opens directly on the call of cooling/heating. The damper position is Pos H.
• b. Configured by Y1O, Y2O, or Y3O.
• c. Configured by 6FAN.

LEGEND

• Spd L — Low Speed (Fan)
• Spd H — High Speed (Fan)

If DCV (demand controlled ventilation) is enabled, then each fa n speed corresponds to 2 damper position ventilation set points (VENT MIN, VENT MAX), e.g., Pos L corresponds to 2VENTMIN L… 2VENTMAX L. See Table 14.
If the CO2 sensor is connected but DCV is disabled, then each fan speed corresponds to one minimum damper position ventilation set point. See Table 15.

Table 13 — Different Damper Minimum Positions with Different Configured Outputs

FAN TYPE| 1-SPEED COOLING a| 2-STAGE COOLING b| 3-STAGE COOLING b
---|---|---|---

1-SPEED FAN b

| •      Pos H (regardless of cooling demand,

OCC=Yes)

| •      Pos H (regardless of cooling demand,

OCC=Yes)

| •      Pos H (regardless of cooling demand,

OCC=Yes)

2-SPEED FAN b

| •      Pos H (regardless of cooling demand, OCC=Yes)| •      Pos L

(0 or 1 cooling demand)

•      Pos H

(2 cooling demands)

| •      Pos L4

(0 or 1 cooling demand)

•        Pos H

(2 or 3 cooling demands)

NOTE(S):

• a. Configured by Y1O, Y2O or Y3O.
• b. Configured by 6FAN.

LEGEND

• Pos L — Damper MIN POS for Low-Speed Fan
• Pos H — Damper MIN POS for High-Speed Fan

Table 14 — Different Damper Position Setting with Different Configured Outputs (DCV is Enabled)

FAN TYPE| 1-STAGE COOLING a| 2-STAGE COOLING a| 3-STAGE COOLING a
---|---|---|---

1-SPEED FAN b

| •      2VENTMIN H to 2VENTMAX H (regardless of cooling demand,

OCC=Yes)

| •      2VENTMIN H to 2VENTMAX H (regardless of cooling demand,

OCC=Yes)

| •      2VENTMIN H to 2VENTMAX H (regardless of cooling demand

OCC=Yes)

2-SPEED FAN

| •      2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes)| • 2VENTMIN L to 2VENTMAXL (0 or 1 cooling demand)

•      2VENTMIN H to 2VENTMAX H (2 cooling demands)

| •      2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand)

•      2VENTMIN H to 2VENTMAX H (2 or 3 cooling demands)

NOTE(S):

• a. Configured by Y1O, Y2O, or Y3O.
• b. Configured by 6FAN.

Table 15 — Different Damper Position Setting with Different Configured Outputs (DCV is Disabled, CO2 sensor is connected)

FAN TYPE| 1-STAGE COOLING a| 2-STAGE COOLING a| 3-STAGE COOLING a
---|---|---|---
1-SPEED FAN b| •      2VENTMIN H (regardless of cooling demand, OCC=Yes)| •      2VENTMIN H (regardless of cooling demand, OCC=Yes)| • 2VENTMIN H (regardless of cooling demand, OCC=Yes)

2-SPEED FAN b

| ****

•      2VENTMIN H (regardless of cooling demand, OCC=Yes)

| •       2VENTMIN L

(0 or 1 cooling demand)

•       2VENTMIN H

(2 cooling demands)

| •      2VENTMIN L (0 or 1 cooling demand)

•      2VENTMIN H (2 or 3 cooling demands)

NOTE(S):

• a. Configured by Y1O, Y2O, or Y3O.
• b. Configured by 6FAN.

COOLING DELAY VIA INCREASING FAN SPEED

If there is cooling demand while outside air is suitable for economizing, then the economizer controller tries to increase fan speed to maximize the use of outside air first. If the cooling demand is not reached within a set time, then mechanical cooling will be enabled.
Typical field application:

1. 1. Prerequisites:
   • a. Outside air is suitable for economizing and free cool-ing is ON.
   • b. Fan connected to the controller supports multiple speeds. The cooling delay function does not work if only a one-speed fan is connected to the controller.
2. If it is a 2-speed fan and there are 2 cooling deman d inputs/outputs, then when Y1-Input is called, the controller sets fan speed to Speed Low. The damper is fully open (100%).
   • a. If Y2-Input is also called, then the controller increases fan speed to Speed High and starts fan delay (2FAN DLY) time. After the delay time runs out, the controller starts Y1-Output.
   • b. If the cooling demand is not reached within 3STG 3 DLY time and OAT is higher than MAT set point (3MAT SET), then the controller starts Y2-Output.

DEMAND CONTROLLED VENTILATION (DVC)

If a field-installed CO2 sensor is connected to the EconomizerONE controller, then a demand-controlled ventilation strategy will operate automatically. As the CO2 level in the space increases above the set point (on the EconomizerONE controller), the minimum position of the dampers will be increased proportionally until the Maximum Ventilation setting is reached. As the space CO2 level decreases because of the increase in fresh air, the outdoor damper will follow the higher demand condition from the DCV mode or from the free cooling mode. The controller modulates the outside air damper based on the CO2 level through the ppm value selected between the range of 500 and 2000 ppm. The measured CO2 concentration value is compared with the set DCV set point. If the measured CO2 concentration value is below the DCV set point, then keep the damper to the minimum position. Otherwise, enable DCV. Once DCV is enabled, the DCV PID starts to run to control the indoor CO2 con-centration value towards the DCV set point. The damper opens to the maximum position.

NOTE: DCV is disabled if the controller receives no occupancy signal. DCV operation is available in Occupied and Unoccupied periods with the EconomizerONE system. However, a control modification will be required on the unit system to implement the Un-occupied period function. See Appendix B, Tables A-B “Fixed Dry-Bulb without DCV (CO2 Sensor) — 2-Speed Fan” on page 33 and “Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In Conventional Mode” on page 34 for controls and command operation.

HIGH HUMIDITY LIMITATION

The economizer controller applies a high limit of humidity to enthalpy-based economizing. When the OA dew point is below the dew point set point, enthalpy- based economizing is available. Otherwise, enthalpy-based economizing is unavailable.

ANTI-FREEZE PROTECTION

The economizer controller initiates the anti-freeze protection if the MAT or OAT temperature falls below the anti-freeze set point.

MAT-BASED ANTI-FREEZE PROTECTION

1. If MAT temperature falls below the anti-freeze set point (3FRZ PROT), then:
   • The controller closes both the damper and compressor if the unit type is a conventional unit and cooling/heating conventional operation mode is enabled.
   • The controller closes the damper if the unit type is heat pump and heat pump operation mode is enabled.
2. If the MAT sensor fails, MAT is substituted by OAT to continue the anti-freeze assessment. If the OAT sensor also fails, then the controller closes the damper immediately. OAT-BASED ANTI-FREEZE PROTECTION

If the OAT temperature falls below the OAT lockout set point (3OAT LOCK), then:

1. The controller stops the compressor from running if the unit type is a conventional unit and the cooling/heating conventional opera-tion mode is enabled
2. The controller compressor is bypassed if the unit type is a heat pump and heat pump operation mode is enabled.

EXHAUST FAN OPERATION

Up to 2 exhaust fans can be connected to the economizer controller.

• If Exhaust Fan 1 is connected and configured, then the Exhaust Fan 1 parameter group (L, M, and H) is available, depending on fan configuration.
• If Exhaust Fan 2 is connected and configured, then the Exhaust Fan 2 parameter group (L, M, and H) is available, depending on fan configuration.
• The controller energizes Exhaust Fan Relay 1 and Exhaust Fan Relay 2 if the damper position reaches Exhaust Fan 1 parameter setting and Exhaust Fan Relay 2 parameter set-ting respectively. The selection of L, M, or H matches th e current fan speed.

NOTE: If terminal ACT-FB is configured, then the damper po-sition is the damper feedback position. If feedback signal is un-available, then it is the simulated position.

OCCUPANCY INPUT

The economizer controller can receive an occupancy signal from the connected thermostat or work under Occupied mode all the time. This is configurable in the Thermostat setup from Climatix™ mobile application or under the menu of I/O Con-figuration on the inbuilt display. See “Parameter Settings —I/O Configurations” on page 29 for more information.

IMPORTANT: On the call of cooling, when the controller i s configured to receive signal from the thermostat but the thermo-stat is working under the Unoccupied mode, the damper is fully closed if outside air is not suitable for economizing. If outside air is suitable for economizing, then the damper is fully open.

PRE-OCCUPANCY PURGE

The Pre-Occupancy purge demand comes from the configura-tion of the Auxiliary features in Climatix™ mobile applicatio n or 6AUX2-I under the menu of I/O Configuration on the in-built display. During pre-occupancy purge on the call of heating, or when there is no cooling/heating demand, the damper position is MIN POS. During pre-occupancy purge on the call of cooling, the damper position is MIN POS if outside air is not suitable for economiz-ing. If outside air is suitable for economizing, then the dampe r is fully open.

AIRFLOW COMMISSIONING
Airflow measurement station (differential pressure signal) can connect to the controller temporarily to run airflow commis-sioning to calculate, calibrate, and store 4 fan speed character-istic curves automatically at damper positions 40%, 60%, 80%, and 100%. The controller places the damper to a proper posi- tion to meet minimum or any other airflow requests in cfm. Users can enable this function only from the Climatix™ mobile application if the related function is available in the current mobile application version.

FAULT DETECTION AND DIAGNOSTICS

The economizer controller can detect and diagnose free cool-ing faults, sensor operation faults, and damper modulating faults. It can also report anti-freeze and shutdown notifications and actuator errors. Following is a list of all detectable or re-portable information:

• Sensor disconnected or has no signal.
• Sensor short or high signal (under range or over range).
• Not economizing.
• Unexpected economizing.
• Excess outdoor air.
• Damper not modulating.
• Input power monitor and brownout. After detectin g brownout, the economizer controller enters the brownout protection mode and disables all of the relay outputs.
• Anti-freeze notifications.
• Shutdown notifications.
• Actuator errors.
• Leaving air temperature is too low or too high.
• Cooling/heating error.
• Damper actuator cycle count. Parameter 1ACT CNT indi-cates number of times actuator has cycled. It is resettable via HMI item 8ACT CNT RESET.

IMPORTANT: The first 6 faults are detectable via LEDs or alarm reports on the LCD. See LED Indication on page 17 and Alarms on page 30 for fault indications. These faults can also be displayed in the Operating section of the Climatix™ mobile application.

FIRMWARE UPDATE

NOTE: Back up configurations before firmware update. All the previous configuration data are erased after firmware update.
NOTE: Contact Application Engineering for more informatio n on support for firmware.

IMPORTANT: If the controller enters the configuration state for the convenience of I/O configurations, then users can manually switch to the running state after finishing configurations. To do so, press Enter + Up at the same time, then press Enter to con-firm the switch after 8RUN STATE appears on the LCD.

MOUNTING, INSTALLATION, AND WIRING

WARNING

Failure to follow this caution may result in damage to equipment. Be sure to allow enough time for compressor startup and shutdown between checkout tests so that the compressors do not short-cycle.

Mounting the Economizer Controller Base Module

Before mounting, leave specific mounting clearances so that there is space for mounting, wiring, and servicing. See Fig. 39 and Table 16 for economizer controller wiring details. POL 224 can be mounted to sheet metal. Use two no. 6 – 3/4 in. self-tapping screws to mount POL 224. Order screws and spacers separately, as they are not provided with the products. Contact Application Engineering for detailed clearance require-ments and graphical mounting instructions.

Mounting Devices Connected to the Economizer Controller

Devices like damper actuators, sensors (temperature sensor, hu-midity sensor, combination temperature and humidity sensor, CO2 sensor), thermostats, and exhaust fans can be connected to the economizer controller. For information on how to mount the de-vices, see the device’s installation instructions.

Table 16 — Economizer Control Wiring Settings

Sensor
5| COM| COM| Mixed or Discharge Air Temperature Sensor Common
6| OAT| Type II NTC 10K or 0-10 vdc| Outside Air Temperature Sensor
7| OAH| 0-10 vdc or 4-20mA| Outside Air Relative Humidity Sensor
8| COM| COM| Outside Air Temperature Sensor or

Outside Air Relative Humidity Sensor Common

9| AUX-AI| 0-10 vdc, 2-10 vdc or 0-5 vdc| Air Quality Sensor or Pressure Sensor
10| RAT| Type II NTC 10K or 0-10 vdc| Return Air Temperature Sensor
11| RAH| 0-10 vdc or 4-20mA| Return Air Relative Humidity Sensor
12| S-COM| COM| 24 vac Common
13| S-24V| 24 vac| 24 vac Power Out to Sensors
14| ACT-FB| 2-10 vdc| Damper Actuator Feedback
15| ACT2-10| 2-10 vdc| Damper Actuator Output
16| ACT-COM| COM| Damper Actuator Output Common
17| ACT-24V| 24 vac| 24 vac Power Out to Damper Actuator

18

| ****

AUX2-O

| ****

24 vac OUT

| Configurable:

•      Cooling Stage 3 Output

•      Exhaust Fan (1 or 2)

•      System Alarm Output (Title 24)

19| COM| COM| 24 vac Common

20

| ****

AUX2-1

| ****

24 vac IN

| Configurable:

•      Cooling Stage 3 Input

•      Shut Down

•      Heat Conventional (W1)

•      Heat Pump Changeover (reversing valve OB)

•      Pre-Occupancy

21

| ****

AUX1-O

| ****

24 vac OUT

| Configurable:

•      Cooling Stage 3 Output

•      Exhaust Fan (1 or 2)

•      System Alarm Output (Title 24)

22| COM| COM| 24 vac Common

23

| ****

AUX1-I

| ****

24 vac IN

| Configurable:

•      Cooling Stage 3 Input

•      Shut Down

•      Heat Conventional (W1)

•      Heat Pump Changeover (reversing valve OB)

•      Pre-Occupancy

24| OCC| 24 vac IN| Occupancy Input
25| Y2O| 24 vac OUT| Cooling Stage 2 Output to Stage 2 Mechanical Cooling
26| Y2I| 24 vac IN| Cooling Stage 2 Input from Commercial Thermostat
27| Y1O| 24 vac OUT| Cooling Stage 1 Output to Stage 1 Mechanical Cooling
28| Y1I| 24 vac IN| Cooling Stage 1 Input from Commercial Thermostat
29| C| COM| 24 vac Common
30| R| 24 vac| 24 vac Power

Connecting Peripheral Devices to the Economizer Controller

See Fig. 40-45 for wiring details.

Fig. 45 — Single Dry-Bulb Switchover, Thermostat, Damper Actuator, OAT and MAT Sensors Typical Wiring

SETUP AND CONFIGURATION

IMPORTANT: Before setup and configuration, it is recom-mended to obtain some location-based values, such as shutof f points, or utilize the location services in the Climatix™ mo-bile application.

Set up and configure the economizer controller before putting it into usage. This can be accomplished by using the Climatix™ mobile application or the inbuilt display. After sensor, com-pressor, thermostat, or actuator is connected to the economizer controller, values/statuses are displayed in the Operating sec-tion of the mobile application and on the LCD. Users can manually change basic and advanced settings, configure I/Os, and test the damper operation and any configured outputs by modi-fying the corresponding parameter values in the local device or mobile application. See Tables 17-24 for a complete list of al l parameters on the LCD display. Refer to it during the setup an d configuration process.
NOTE: For all units, the controller login is Administrator, and the default controller password is OneBT.

NOTE: Parameters and display menus may display differently/dynamically if different applications are config-ured. See Tables 17-24.

IMPORTANT: Not all operations are available on the local POL 224. For example, users can only obtain shutoff set points and perform cfm commissioning via the Climatix ™ mobile application. Setup and configuration on the local device are only recommended if operations from the mobile application are unavailable. Check the mobile application fo r all operations that can be performed from the mobile application end.

IMPORTANT: By connecting the RS485 port to a PC, all parameters are also readable or writable from PC tools such as Modbus Poll.exe via Modbus and Yabe.exe via MSTP (Bps 38400 [default], Bps 9600, Bps 19200, Bps 115200). Note that an external End of Line (EOL) element is required to achieve Baud Rate 115200 at a maximum cable length o f 4000 ft (1.2 km).

Table 17 — Status Display

YES NO

1ECON ENAB| Indicates if outdoor air is being used for the first stage of cooling.

1OCCUPIED

| Indicates if the space is occupied. If users choose ALWAYS for 6OCC when configuring I/Os, the parameter value is YES ; if users keep the default selection T-STAT for 6OCC and the controller receives 24-v signal from OCC input, the value is YES. Otherwise, the value is

NO.

1Y1-IN| Y1-IN call from thermostat for Cooling Stage 1.| ****

ON OFF

1Y1-OUT| Y1-OUT signal to compressor for Cooling Stage 1.
1Y2-IN| Y2-IN call from thermostat for Cooling Stage 2.
1Y2-OUT| Y2-OUT signal to compressor for Cooling Stage 2.

Dynamic item: Appears only if Y2-OUT terminal is configured.

1AUX1-I| Aux1-IN signal.

Dynamic item: Appears only if Aux1-In terminal is configured.

1AUX1-O| Aux1-OUT signal.

Dynamic item: Appears only if Aux1-OUT terminal is configured.

1AUX2-I| Aux2-IN signal.

Dynamic item: Appears only if Aux2-In terminal is configured.

1AUX2-O| Aux2-OUT signal.

Dynamic item: Appears only if Aux2-OUT terminal is configured.

1COMP STAGE

| ****

Indicates compressor current stage.

| Off 1

2

3

1HEAT ENAB| Indicates if heating is enabled.| ****

YES NO

1MIX AIR LOW

| Indicates if the anti-freeze protection function is enabled for a mixed air temperature sensor. If the detected air temperature is lower than the anti- freeze protection set point

(3FRZ PROT), the parameter value is YES. Otherwise, it is NO.

1MAT PRES

| Indicates the present value of the mixed air temperature (MAT) sensor.

Dynamic item: Appears only if MAT or AUTO is selected for

3DIF T LOC under Advanced Settings Table.

| ****

The corresponding detected value is displayed on the LCD.

1LAT PRES| Indicates the present value of the leaving air temperature (LAT) sensor.

Dynamic item: Appears only if LAT or AUTO is selected for 3DIF T LOC.

1OAT PRES| Indicates the present value of the outdoor air temperature (OAT) sensor.

Dynamic item: Appears only if an OAT sensor is configured.

1OAH PRES| Indicates the present value of the outdoor air relative humidity (OAH) sensor.

Dynamic item: Appears only if an OAH sensor is configured.

1RAT PRES| Indicates the present value of the return air temperature (RAT) sensor.

Dynamic item: Appears only if a RAT sensor is configured.

1RAH PRES| Indicates the present value of the return air relative humidity (RAH) sensor.

Dynamic item: Appears only if a RAH sensor is configured.

1CO2 PRES| Indicates the present value of the CO2 sensor.

Dynamic item : Appears only if a CO2 sensor is configured.

1DCV STATUS

| Indicates the demand controlled ventilation (DCV) status.

Dynamic item: Appears only if a CO2 sensor is configured.

Displays ON if the measured CO2 concentration value is above the DCV set point and OFF

if below the DCV set point.

| ****

ON OFF

1FAN SPD LV

| Indicates the current fan speed status (low, medium or high). If a one- speed fan is connected and configured, this item is invisible.

Dynamic item: Appears only if “ 6FAN ” is configured as “ 2SPEED ” under I/O Configuration Table.

| ****

L H

1ACT OUT| Indicates current position of damper actuator in v.| ****

The corresponding detected value is displayed on the LCD.

1ACT FB| Indicates feedback signal of damper actuator in v.
1ACT POS| Indicates current position of damper actuator in % Open.
1ACT CNT| Indicates number of times actuator has cycled (1 cycle = 180 degrees of movement in any direction). Resettable via HMI item 8ACT CNT RESET under Enter Running State Table.

1EQUIP

| Indicates the equipment type. If HP(O) or HP(B) is chosen for 6AUX1-I , the parameter value is HP(O) or HP(B) respectively. If neither is chosen, the value is CON RTU.| HP(O)

HP(B) CON RTU

1INS| Indicates the installation date of the Economizer Controller. If the installation date is incorrect, press Enter to change and confirm month, date and year.| —

Table 18 — Parameter Settings — Basic

2 TEMP OFF

| Temperature shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick plugged into the Economizer Controller and the Climatix™ mobile application is installed on the phone or tablet. This can also be a manually defined set

point.

| ****

48…80°F, increment by 1

| ****

63°F

2ENTH OFF

| Enthalpy shutoff set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick plugged into the Economizer Controller and the Climatix™mobile application is installed on the phone or tablet. This can also be a manually defined set point.

Dynamic item: Appears only if an OAH sensor is configured.

| ****

22…30 Btu/lbm, increment by 1

| ****

28 Btu/lbm

2DVC

| Demand controlled ventilation set point can be obtained automatically if a smartphone or tablet is connected to the network provided by a Wi-Fi/WLAN stick plugged into the Economizer Controller and the Climatix™mobile application is installed on the phone or tablet. This can also be a manually defined set point.

Dynamic item: Appears only if a CO2 sensor is configured.

| ****

300…2000PPM, increment by 100

| ****

1100PPM

2FAN L ACT

| Damper minimum position when fan runs at a low speed.

Dynamic item: Appears only if “ 6FAN ” is configured as “ 2SPEED ” under I/O Configuration Table.

| ****

2…10V

| ****

3.6V

2FAN H ACT

| Damper minimum position when fan runs at a high speed.

Dynamic item: Appears only if “ 6FAN ” is configured as “ 1SPEED ” or “ 2SPEED ”.

| ****

2…10V, increment by 0.1

| ****

2.8V

2VENTMAX L

| DCV maximum position when fan runs at a low speed.

Dynamic item: Appears only if a CO2 sensor is configured and “ 6FAN ” is

configured as “ 2SPEED ”.

| ****

2…10V, increment by 0.1

| ****

3.6V

2VENTMAX H

| DCV maximum position when fan runs at a high speed.

Dynamic item: Appears only if a CO2 sensor is configured and “6FAN” is

configured as “ 1SPEED ” or “ 2SPEED ”.

| ****

2…10V, increment by 0.1

| ****

2.8V

2VENTMIN L

| DCV minimum position when fan runs at a low speed.

Dynamic item: Appears only if a CO2 sensor is configured and “6FAN” is

configured as “ 2SPEED ”.

| ****

2…10V, increment by 0.1

| ****

3.1V

2VENTMIN H

| DCV minimum position when fan runs at a high speed.

Dynamic item: Appears only if a CO2 sensor is configured and “ 6FAN ” is

configured as “ 2SPEED ”.

| ****

2…10V, increment by 0.1

| ****

2.3V

CFM COMM

| Air Flow Chart: CFM commissioning can only be initiated from the

Climatix™mobile application. When CFM commissioning is in progress, the local device reads “ CFM COMM ”.

| ****

—

| ****

—

2DEGREES| Temperature unit (°F or °C).| —| °F
2FAN| Fan cfm.| 100…50,000cfm, increment by 100| 5000 cfm

2EX1 L

| Exhaust Fan 1 low-speed parameter setting.

Dynamic item: Appears only if:

•        Exhaust Fan 1 is configured.

•      “ 6FAN ” is configured as “ 2SPEED ”.

| ****

0…100%, increment by 1

| ****

65%

2EX1 M

| Exhaust Fan 1 medium-speed parameter setting.

Dynamic item : Appears only if:

•      Exhaust Fan 1 is configured.

| ****

0…100%, increment by 1

| ****

60%

2EX1 H

| Exhaust Fan 1 high-speed parameter setting.

Dynamic item: Appears only if:

•      Exhaust Fan 1 is configured.

•      “ 6FAN ” is configured as “ 2SPEED ”.

| ****

0…100%, increment by 1

| ****

50%

2EX2 L

| Exhaust Fan 2 low-speed parameter setting.

Dynamic item: Appears only if:

•      Exhaust Fan 2 is configured.

•      “ 6FAN ” is configured as “ 2SPEED ”.

| ****

0…100%

| ****

80%

2EX2 M

| Exhaust Fan 2 medium-speed parameter setting.

Dynamic item: Appears only if:

•      Exhaust Fan 2 is configured.

| ****

0…100%, increment by 1

| ****

78%

2EX2 H

| Exhaust Fan 2 high-speed parameter setting.

Dynamic item: Appears only if:

•      Exhaust Fan 2 is configured.

•      “ 6FAN ” is configured as “ 2SPEED ”.

| ****

0…100%, increment by 1

| ****

75%

2THL| Temperature high limitation.

Dynamic item: Appears only if an RAT sensor is configured.

| 0…100%, increment by 1| 83%
2EHL| Enthalpy high limitation.

Dynamic item: Appears only if an RAH sensor is configured.

| 22…30 Btu/lbm, increment by 1| 33 Btu/lbm
2FAN DLY| Cooling delay via increasing fan speed.| 0…30 min, increment by 1| 5 min.

Table 19 — Parameter Settings — Advanced

15m
3SD ACT POS| Damper position during shutdown (open or closed).| CLO OPN| CLO

3DIF T LOC

| MAT sensor location:

•      Choose MAT if the sensor is installed before the DX (Direct Expansion) coil.

•      Choose LAT if the sensor is installed after the DX coil.

•      Choose AUTO to let the Economizer Controller automatically detect the location.

| MAT LAT AUTO| ****

LAT

3LAT LOW| Low limit of leaving air temperature.

Dynamic item: Appears only if LAT or AUTO is selected for 3DIF T LOC.

| 35…65°F, increment by 1| 45°F
3LAT HIGH| High limit of leaving air temperature.

Dynamic item: Appears only if LAT or AUTO is selected for 3DIF T LOC.

| 70…180°F, increment by 1| 80°F
3OAT CAL| OAT sensor calibration.| –2.5. 2.5°F, increment by 0.5| 0°F
3RAT CAL| RAT sensor calibration.

Dynamic item: Appears only if an RAT sensor is configured.

| –2.5. 2.5°F, increment by 0.5| —
3OAH CAL| OAH sensor calibration.

Dynamic item: Appears only if an OAH sensor is configured.

| ****

–10…10%, increment by 0.5

| ****

10%

3RAH CAL| RAH sensor calibration.

Dynamic item: Appears only if an RAH sensor is configured.

3MAT CAL| MAT or LAT sensor calibration.| –2.5. 2.5°F, increment by 0.5| 0°F
3MAT SET| Set point of MAT or LAT sensor.| 38…70°F, increment by 1| 53°F
3FRZ PROT| Anti-freeze protection set point of MAT sensor.| 35…55°F, increment by 1| 45°F
3OAT LOCK| OAT lockout set point for anti-freeze protection.| –45…80°F, increment by 1| 32°F

Table 20 — Parameter Settings — I/O Configurations

6AUX1-I

| Auxiliary DI-1. Configurable as:

•      None.

•      Cooling stage 3 (Y3) from thermostat.

•      Heat Conventional (W1) from thermostat.

•      Heat pump (reversing valve O).

•      Heat pump (reversing valve B).

•      Pre-occupancy signal from thermostat.

•      Shutdown signal from unit.

| ****

NONE Y3 IN W1 HP(O)

HP(B) PREOCC SHUTDWN

| ****

W1

6AUX2-I

| Auxiliary DI-2. Configurable as:

•      None.

•      Cooling stage 3 (Y3) from thermostat.

•      Heat stage 1 (W1) from thermostat.

•      Heat pump (reversing valve O).

•      Heat pump (reversing valve B).

•      Pre-occupancy signal from thermostat.

•      Shutdown signal from unit.

NOTE: Whichever is chosen for 6AUX1-I does not appear in the list of 6AUX2-I.

| ****

NONE Y3 IN W1 HP(O)

HP(B) PREOCC SHUTDWN

| ****

NONE

6OAT SIG| Configures signal type of OAT sensor.| 0-10V NTC10K| NTC10K

6RAT SIG

| ****

Configures signal type of RAT sensor.

| 0-10V NTC10K NONE| ****

NONE

6OAH SIG| Configures signal type of OAH sensor.| 0-10V

4-20mA NONE

| ****

NONE

6RAH SIG| Configures signal type of RAH sensor.
6MAT SIG| Configures signal type of MAT or LAT sensor.| 0-10V NTC10K| NTC10K

6AUX-AI1

| Auxiliary AI-1. Configurable as:

•      CO2 sensor.

•      Static pressure (temporarily for CFM commissioning) sensor.

•      None.

| PRESSURE CO2 NONE| ****

NONE

6X-AI1 SIG

| ****

Configures CO2 sensor type.

| 0-10V

2-10V

0-5V

| ****

0-10V

6CO2 Rng L| Configures the low limit of CO2 measuring range.| 0…500; increment by 10| 0
6C02 Rng H| Configures the high limit of CO2 measuring range.| 1000…3000;

increment by 50

| 2000
6AUX-AI2| Choose ACT FB if feedback signal is available from the connected damper actuator. Otherwise, choose NONE.| ACT FB NONE| ACT FB
6Y2O| Choose COOL 2 if Cooling Stage 2 is available (another compressor is connected to the Economizer). Otherwise, choose NONE.| COOL 2 NONE| COOL 2
PARAMETER| DESCRIPTION| VALUE| DEFAULT
---|---|---|---

6AUX1-O

| Auxiliary DO-1. Configurable as:

•      None.

•      Cooling stage 3 output.

•      Exhaust fan (1 or 2).

•      Alarm output to thermostat (Title 24).

| NONE Y3O EXHAUST ALARM| ****

EXHAUST

6AUX2-O

| Auxiliary DO-2. Configurable as:

•      None.

•      Cooling stage 3 output.

•      Exhaust fan (1 or 2).

•      Alarm output to thermostat (Title 24).

NOTE: Of all but Exhaust Fan, whichever is chosen for 6AUX1-O does not appear in the list of 6AUX2-O.

| ****

NONE Y3O EXHAUST ALARM

| ****

ALARM

6FAN| Configures fan speeds of the variable speed supply fan.| 1SPEED

2SPEED

| 2SPEED
6RS485| Switch between MSTP and Modbus.| MSTP MODBUSSLV| MSTP

Table 21 — Alarm Parametersa,b

disconnected.
4CO2 SEN ALARM| CO2 sensor has failed, gone out of range or become disconnected.
4OAT SEN ALARM| OAT sensor has failed, gone out of range or become disconnected.
4OAH SEN ALARM| OAH sensor has failed, gone out of range or become disconnected.
4RAT SEN ALARM| RAT sensor has failed, gone out of range or become disconnected.
4RAH SEN ALARM| RAH sensor has failed, gone out of range or become disconnected.
4FREEZE ALARM| Anti-freeze notification when MAT sensor is below anti- freeze protection set point.
4RTU SHUTDOWN| Notification of Shutdown Active when SHUTDWN is chosen for 6AUX1-I or 6AUX2-I.
4ACTUATOR ALARM| Actuator gets disconnected or has failed.
4ACT UNDER V| Voltage received by the actuator is below expected range.
4ACT OVER V| Voltage received by the actuator is above expected range.
4ACT STALLED| Damper actuator stopped before achieving commanded position.
4ACT SLIPPING| Damper actuator slips after reaching commanded position.
4NOT ECON| Not Economizing when it should.
4ECON SHOULDNT| Economizing when it should not.
4EXCESS OA| Excess outdoor air. Outside air intake is significantly higher than it should be.
4LLA ALARM| Leaving air temperature is lower than the low limit (3LAT LOW).
4HLA ALARM| Leaving air temperature is higher than the high limit (3LAT HIGH).
4HEAT ALARM| Economizer heating error.
4COOL ALARM| Economizer cooling error.

NOTE(S):

• a. All alarms are dynamic items. An alarm appears only if a related symptom mentioned above is detected.
• b. An alarm activation triggers a general alarm, then the configured system alarm output (AUX1-O or AUX2-O) is activated. If there is no alarm, NO ALARM is displayed on the HMI.

Table 22 — Test Commands

drive damper to minimum position.
7DAMPER CLOSE| Press Enter to test if the Economizer Controller can drive damper to 100% Closed.
7DAMPER OPEN| Press Enter to test if the Economizer Controller can drive damper to 100% Open.
7DAMPER ALL| Press Enter to perform all the above tests.
7DAMPER| Press Enter to test if the Economizer Controller can drive damper to the selected voltage.
7Y1O| Press Enter to test if the Economizer Controller can turn on or off the first stage of cooling (close or open relay Y1O).
7Y2O| Press Enter to test if the Economizer Controller can turn on or off the second stage of cooling (close or open relay Y2O).
7AUX1-O| Press Enter to test AUX1-O connection (close or open relay AUX1-O).
7AUX2-O| Press Enter to test AUX2-O connection (close or open relay AUX2-O).

Table 23 — Enter Running State

(This action resets the controller password to default: OneBT.)
8DEF CONFIRM?| Confirm the factory resetting.
8ACT CNT RESET| Damper count reset.
8VER x.x.x| Firmware version information such as 0.1.10.

Table 24 — Enter Configuration State and Restart

change.
5ENTER CONFIG?| Confirm the change to Configuration State.
5RESTART| Restart the Economizer Controller. Press Enter to confirm the restart.
5CONF RESTART| Confirm the restart.

START-UP

Cooling with EconomizerONE System For Occupied mode operation of EconomizerONE system, there must be a 24 v signal at terminals R and OCC (provided through PL6-3 from the unit’s IFC coil). Removing the signal at OCC places the EconomizerONE control in Unoccupied mode. See Table A in Appendix A “Troubleshooting” o n page 32 for damper position control and other troubleshooting. During Occupied mode operation, indoor fan operation will be accompanied by economizer dampers moving to Minimum Po-sition set point for ventilation. If indoor fan is off, then damp-ers will close. During Unoccupied mode operation, dampers will remain closed unless a Cooling (by free cooling) or DC V demand is received. When free cooling using outside air is not available, the uni t cooling sequence will be controlled directly by the space thermostat. Outside air damper position will be closed or Minimum Position as determined by Occupancy mode and fan signal. When free cooling is available, as determined by the appropri-ate changeover command (dry bulb, outdoor enthalpy, differen-tial dry bulb, or differential enthalpy), a call for cooling (Y1 closes at the thermostat) will cause the economizer control to modulate the dampers open and closed to maintain the uni t supply air temperature. Default supply temperature is 53°F (12°C), with a range of 38°F to 70°F (3.3°C to 21.1°C). Com-pressor will not run. Should 100% outside air not be capable of satisfying the space temperature, space temperature will rise until Y2 is closed. The economizer control will call for compressor operation. Damp-ers will modulate to maintain SAT at set point concurrent with Compressor 1 operation. The “Low T Temp” setting (default 32°F [0°C]) will lock out compressor operation.
When space temperature demand is satisfied (thermostat Y1 opens), the dampers will return to Minimum Damper positio n if indoor fan is running or fully closed if fan is off. If accessory power exhaust is installed, then the power exhaust fan motors will be energized by the economizer control as the dampers open above the EXH1 SET set point and will be ener-gized as the dampers close below the EXH1 SET set point. Damper movement from full closed to full open (or vice versa) will take between 1-1/2 and 2-1/2 minutes.

Heating with EconomizerONE System

During Occupied mode operation, indoor fan operation will be accompanied by economizer dampers moving to Minimum Po-sition set point for ventilation. If indoor fan is off, then damp-ers will close. During Unoccupied mode operation, dampers will remain closed unless a DCV demand is received. When the room temperature calls for heat (W1 closes), the heating controls are energized. Refer to Appendix A “Troubleshooting” on page 32, Appendix B “SEQUENCE OF OPERATION EXAMPLES” on page 33, and Appendix C “MODBUS ADDRESSES” on page 36 fo r troubleshooting operation issues.

APPENDIX A

APPENDIX A — TROUBLESHOOTING

Table A — Operating Issues and Concerns

system following the detailed alarm information.
DAC LED is blinking RED| Damper slippage| Check whether the damper works properly.
DAC LED is blinking RED quickly| Damper unplugged| Check whether the damper is connected.
DAC LED is OFF| Terminal ACT-FB is configured but there is no available feedback signal| Check whether the feedback signal is connected; check if ACT- FB is faulty.

Economizer controller has no alarm, but the Free Cooling LED will not turn on when the OA seems to be suitable for Free Cooling

| Shutoff SP setting error| Shutoff temperature and/or enthalpy set point is incorrectly set up. Consult an HVAC professional to set up the shutoff set point correctly.
OA temp is too low| The OA temperature is too low; therefore, there is no cooling demand. This could possibly enable anti-freeze protection.

OA temp is too high or too humid

| In DIFF mode, even though OA temperature is lower than RA temperature, if both OA and RA temperatures exceed the high limit, then Free Cooling turns 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, then Free Cooling turns off.

Economizer controller/mechanical cooling is not operating

| ****

No input power

| Use a multi-meter to check whether there is 24 vac ± 25% (18-30 vac) at the POWER terminals. If there is no voltage or if the voltage is significantly low, then check the transformer output voltage at the RTU. If 24-v is not present at the transformer secondary side, then check the primary line voltage to the transformer.

If the line voltage is not present at the transformer primary side, then check the primary power to the RTU, fuses, circuit breaker, and so on.

Brownout

| If voltage is below 17-v, then the economizer controller may be in Brownout Protection mode. This mode disables all of the relay outputs. When the power is 19 vac or higher, the economizer controller and RTU operate normally.
Y1/Y2 signal is missing from the thermostat| Mechanical cooling does not run until there is cooling demand (Y1/Y2 Active). Check the wiring from Y1I and Y2I terminals to the commercial thermostat. 24-v

should be present between Y1I/Y2I and Y1O/Y2O respectively.

24 vac~ and 24 vac ^

are incorrectly wired

| 24 vac power supply has polarity when all devices are powered by the same 24 vac transformer; reversing polarity may cause a short circuit that can damage the system.

Follow the transformer polarity mark, check the wiring of 24-v~ (or G or 24-v+), and ensure that they are tied to the same polar of 24 vac power supply; while checking the wiring of ^ (or G0 or 24-v- or COM), ensure that they are all tied to another polar

of 24 vac power supply.

Firmware Update Failure

| Application file is damaged, operation

is incorrect, and/or USB flash disk does not work properly.

| Reload a BIN file, restart the controller, update firmware following “Firmware

Update” on page 21, or change a USB flash disk. Contact service provider if failure still exists.

Free Cooling LED is solid RED| Sensor, damper, or whole working system may not work properly| Check sensor, damper, or the whole working system following the detailed alarm information.
Free Cooling LED is blinking RED| Not economizing when it should| Check the whole economizer working system, such as the sensor, damper, and thermostat.
Incorrect controller password error on mobile application| The password has changed from default| ****

Performing a factory reset on the controller will reset the password to OneBT.

RS485 communication failure| RS485 signal or configuration error| Check wiring, configuration, Baud Rate (using mobile application), and other network communication parameters.
Sensor LED is blinking RED| Excess outdoor air| Check the whole economizer working system, such as the sensor, damper, and thermostat.

Sensor LED is solid RED

| Mixed Air (MA) sensor error| Check the MA sensor. It must be either a Type II NTC 10K or 0-10 vdc sensor.

Outside Air (OA)/Return Air (RA) sensor error

| Check the wiring and signal of the OA sensor. If in Differential (DIFF) mode, also check the RA sensor. The following sensor signals are valid:

Type II NTC 10K or 0-10 vdc temperature. 0-10 vdc or 4-20 mA humidity.

Air temperature failure/fault| Check the air temperature sensor signal. The valid signal must be Type II NTC 10K or 0-10 vdc.
Sensor LED is OFF| CO2 sensor error| Check CO2 sensor connection, sensor signal (under range or over range), and

sensor signal type.

Sensor LED is YELLOW| Humidity sensor error| Check humidity sensor connection, sensor signal (under range or over range), and sensor signal type.

Wi-Fi connection failure

| ****

Wi-Fi/WLAN stick error or wrong user name and password

| Unplug and re-plug in the Wi-Fi/WLAN stick, enter a correct user name and password, restart the controller, or replace the Wi-Fi/WLAN stick. If the

Wi-Fi/WLAN stick is POL903.00/100, then the default user name and password are

Siemens-WLAN-Stick and SIBPAdmin. DNS name is siemens.wlanstick. Contact Application Engineering for information on this accessory.

APPENDIX B

APPENDIX B — SEQUENCE OF OPERATION EXAMPLES

Table B — Fixed Dry-Bulb without DCV (CO2 Sensor) — 2-Speed Fan

CONVENTIONAL

| ****

Cooling

| ****

Yes

| N/A| Off| Off| Off| Off| Min Pos L

Yes

| On| Off| Off| Off| Min Pos L to 100%
On| On, <15 mins| On| Off| Min Pos H to 100%
On| On, >15 mins| On| On/Offa , b| Min Pos H to 100%
No| On| Off| On| Off| Min Pos L
On| On| On| On| Min Pos H
Heating| Yes| N/A| Off| Off| Off| Off| Min Pos H

Cooling

| ****

No

| N/A| Off| Off| Off| Off| Closed

Yes

| On| Off| Off| Off| Closed to 100%
On| On, <15 mins| On| Off| Closed to 100%
On| On, >15 mins| On| On/Off a,b| Closed to 100%
No| On| Off| On| Off| Closed
On| On| On| On| Closed
Heating| No| N/A| Off| Off| Off| Off| Closed

HEAT PUMP

| ****

Cooling

| ****

Yes

| N/A| Off| Off| Off| Off| Min Pos L

Yes

| On| Off| Off| Off| Min Pos L to 100%
On| On, <15 mins| On| Off| Min Pos H to 100%
On| On, >15 mins| On| On/Off a,b| Min Pos H to 100%
No| On| Off| On| Off| Min Pos L
On| On| On| On| Min Pos H

Heating

| ****

Yes

| ****

N/A

| Off| Off| Off| Off| Min Pos H
On| Off| On| Off| Min Pos H
On| On| On| On| Min Pos H

Cooling

| ****

No

| N/A| Off| Off| Off| Off| Closed

Yes

| On| Off| Off| Off| Closed to 100%
On| On, <15 mins| On| Off| Closed to 100%
On| On, >15 mins| On| On/Off a,b| Closed to 100%
No| On| Off| On| Off| Closed
On| On| On| On| Closed

Heating

| ****

No

| ****

N/A

| Off| Off| Off| Off| Closed
On| Off| On| Off| Closed
On| On| On| On| Closed

NOTE(S):

• a. If Y2I is ON for more than a set time (15 minutes by default) and the OAT is greater than MAT set point (3MATSET), then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.
• b. Configure 3STG3 DLY under “Parameter Settings — Advanced” on page 29 to change to another set time.

LEGEND

• N/A — Not Applicable

APPENDIX B — SEQUENCE OF OPERATION EXAMPLES (cont)

Table C — Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In Conventional Mode

a

CONVENTIONAL

| ****

Cooling

| No| N/A| NA| Off| Off| Off| Off| Closed| Off

Yes

| ****

N/A

| >SPb| Off| Off| Off| Off| VENT MIN L to VENT MAX L| On/Off c
£ SP| Off| Off| Off| Off| VENT MIN L| Off

No

| ****

Yes

| ****

NA

| On| Off| Off| Off| Closed to Fully Open (100%)| On
On| On| On| On/Off d| Fully open (100%)| On

Yes

| ****

Yes

| >SP| On| Off| Off| Off| VENT MIN L to 100%| On

SP| On| On| On| On/Off d| VENT MIN H to 100%| On
£ SP| On| Off| Off| Off| VENT MIN L or 100%| On
£ SP| On| On| On| On/Off d| VENT MIN H or 100%| On
No| No| NA| On| Off| On| Off| Closed| Off
On| On| On| On

---

Yes

| ****

No

| >SP| On| Off| On| Off| VENT MIN L to VENT MAX L| On/Off c

SP| On| On| On| On| VENT MIN H to VENT MAX H| On/Off c
£ SP| On| Off| On| Off| VENT MIN L| Off
£ SP| On| On| On| On| VENT MIN H| Off

---

Heating

| No| N/A| NA| Off| Off| Off| Off| Closed| Off

Yes

| ****

N/A

| £ SP| Off| Off| Off| Off| VENT MIN H| Off

SP| Off| Off| Off| Off| VENT MIN H to VENT MAX H| On/Off c

---

HEAT PUMP

| ****

Cooling

| ****

Yes

| ****

N/A

| >SP| Off| Off| Off| Off| VENT MIN L to VENT MAX L| On/Off
£ SP| Off| Off| Off| Off| VENT MIN L| Off

Yes

| ****

Yes

| >SP| On| Off| Off| Off| VENT MIN L to 100%| On

SP| On| On| On| On/Off| Fully open (100%)| On
£ SP| On| Off| Off| Off| VENT MIN L to 100%| On
£ SP| On| On| On| On/Off| Fully open (100%)| On

---

Yes

| ****

No

| >SP| On| Off| On| Off| VENT MIN L to VENT MAX L| On/Off

SP| On| On| On| On| VENT MIN H to VENT MAX H| On/Off

NOTE(S):

• a. Exhaust Fan — one or two exhaust fans can be connected to the Economizer Controller.
• b. Set point — Demand controlled ventilation set point.
• c. The controller energizes Exhaust Fan Relay 1 and Exhaust Fan Relay 2 if the damper position reaches Exhaust Fan 1 parameter setting and Exhaust Fan Relay 2 parameter setting respectively.
• d. If Y2I is ON for less than a set time (15 minutes by default), then Relay 2 is OFF. If Y2I is ON for more than a set time and the OAT is greater than MAT set point (3MAT SET), then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.

LEGEND

• N/A — Not Applicable

) a

HEAT PUMP

| Cooling| ****

Yes

| No| £ SP| On| Off| On| Off| VENT MIN L| Off
£ SP| On| On| On| On| VENT MIN L| Off

Heating

| ****

N/A

| >SP| Off| Off| Off| Off| VENT MIN H to VENT MAX H| On/Off

SP| On| Off| On| Off| VENT MIN H to VENT MAX H| On/Off
SP| On| On| On| On| VENT MIN H to VENT MAX H| On/Off
£ SP| Off| Off| Off| Off| VENT MIN H| Off
£ SP| On| Off| On| Off| VENT MIN H| Off
£ SP| On| On| On| On| VENT MIN H| Off

---

Cooling

| No| N/A| NA| Off| Off| Off| Off| Closed| Off
No| Yes| NA| On| Off| Off| Off| Closed to 100%| On
On| On| On| On/Offc| 100%| On
No| No| NA| On| Off| On| Off| Closed| Off
On| On| On| On| Closed| Off

Heating

| ****

No

| ****

N/A

| ****

NA

| Off| Off| Off| Off| Closed| Off
On| Off| On| Off| Closed| Off
On| On| On| On| Closed| Off

NOTE(S):

• a. Configure 3STG3 DLY under Advanced Settings to change to another set time.
• b. The controller energizes Exhaust Fan Relay 1 and Exhaust Fan Relay 2 if the damper position reaches Exhaust Fan 1 parameter setting and Exhaust Fan Relay 2 parameter setting respectively.
• c. If Y2I is ON for less than a set time (15 minutes by default), then Relay 2 is OFF. If Y2I is ON for more than a set time and the OAT is greater than MAT set point (3MAT SET), then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.

LEGEND

• N/A — Not Applicable

APPENDIX C

APPENDIX C — MODBUS ADDRESSES

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

• Catalog No. 04-53480417-01
• Printed in U.S.A. Form IIK-CRECON-MRTU-01
• Rev C Pg 36 1-24

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