Carrier CAECOMZR101A00 Series Packaged Air Handling Units Instruction Manual

Carrier CAECOMZR101A00 Series Packaged Air Handling Units

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:

• 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 that 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 and 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 the unit, turn off the main power switch to the unit and install lock(s) and lockout tag(s). Ensure electrical service to the rooftop unit agrees with the voltage and amperage listed on the unit rating plate. The 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, and equipment cycling by operating the compressors when the outdoor air temperature is too warm, integrating the compressor with outdoor air when free cooling is available, and locking out the compressor when the outdoor air temperature is too cold. Demand-controlled ventilation is supported. The EconomizerONE system utilizes gear-drive technology with a direct mount spring return actuator that will close upon loss of power. EconomizerONE system comes standard with an outdoor air temperature sensor, and mixed air (also called supply air) temperature sensor. See Fig. 1 for an example of the EconomizerONE system. Outdoor and indoor enthalpy, indoor dry bulb temperature, and CO2 sensors are available for field installation. The mixing box dampers are ultra-low leak type and they must be installed perfectly square to achieve the necessary damper seal. See Table 1 for usage, Table 2 for package contents and weights, and Table 3 for sensor usage.

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 requirements, and 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-rated.

Table 1 — Economizer Usage Chart

CAECOMZR101A00

| 40RUA/40RFA*07/08/12

40RUA/40RFQ*07/08/12

40RUS/40RFS*08/10/12

524J/524F*07/08/12A

524J/524F*07/08/12H FAX072/091/120 FHX072/091/120

FAS072/091/120 FHS072/091/120

CAECOMZR102A00

| 40RUA*14/16/25

40RUQ*16/25

40RUS*14/16/25

524J*14/16/25A

524J*16/25H FAS150/180/240 FHS180/240

CAECOMZR103A00

| 40RUA*28/30

40RUS*28/30

524J*28/30 FAS300/336

Table 2 — Package Contents

EconomizerONE ACCESSORY KIT

NUMBER

| ****

QTY

| ****

DESCRIPTION

---|---|---

CAECOMZR101A00

| ****

1

| 40RU000705 Ultra Low Leak Economizer with HF23BL005 Actuator Motor and HH63LW001 POL 224

Economizer Controller

1| 40RU000708 Harness Assembly

1

| Hardware Package containing the following:

– HH63LW001 POL 224 Economizer Controller

– HH79NZ039 Dry Bulb Temperature Sensor Assembly (Qty 2)

CAECOMZR102A00

| ****

1

| 40RU000706 Ultra Low Leak Economizer with HF23BL006 Actuator Motor and HH63LW001 POL 224

Economizer Controller

1| 40RU000708 Harness Assembly

1

| Hardware Package containing the following:

– HH63LW001 POL 224 Economizer Controller

– HH79NZ039 Dry Bulb Temperature Sensor Assembly (Qty 2)

CAECOMZR103A00

| ****

1

| 40RU000707 Ultra Low Leak Economizer with HF23BL006 Actuator

Motor and HH63LW001 POL 224 Economizer Controller

1| 40RU000708 Harness Assembly

1

| Hardware Package containing the following:

– HH63LW001 POL 224 Economizer Controller

– HH79NZ039 Dry Bulb Temperature Sensor Assembly (Qty 2)

Table 3 — EconomizerONE Sensor Usage

Outdoor Air Dry Bulb

| The 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 Sensor| HH57LW001
Differential Dry Bulb Or Enthalpy| HH57LW001 (Qty. 2 required)
CO 2 for DVC Control using a Wall-Mounted CO 2 Sensor| 33ZCSPTCO2LCD-01 or

33ZCSPTCO2-01 or CRCBDIOX005A003

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

33ZCSPTCO2-01

NOTE(S)

• Dry Bub sensor HH79NZ039 is included in the kit. Dry Bulb sensor HH57LW001 can be used as a replacement part.

ECONOMIZER INSTALLATION

Mount Economizer On Unit
Refer to Fig. 5 and 6 then perform the following steps:

1. Orient the unit so that the desired return-air opening is accessible. For vertical installations, reposition the panel from the rear to the bottom of the unit using the same screws.
2. Remove the bag containing loose parts and fasteners from inside the economizer. These parts will be used later.
3. Install field-supplied gasket material over economizer flanges.
4. Place the economizer and gasket over the return-air opening so that the flanges and screw holes on the top and bottom of the economizer box are aligned with those surrounding the return-air opening.
5. Using field-supplied 1/4 in. x 3/4 in. (maximum length) sheet metal screws, fasten the long economizer flanges to the matching return-air opening flanges and tighten all screws.
6. Using the four 10 x 1/2 in. self-tapping screws supplied, fasten the short economizer flanges to the matching return air opening flanges and tighten all screws.

NOTE: The transformer, relay, and mixed-air temperature (MAT) sensor are shipped with the economizer accessory for field installation as follows.
Follow the steps below to install the mixed air temperature sensor.

1. Remove the service panel from the control box end of the unit.
2. Mount the HH79NZ039 mixed-air temperature sensor inside the air handler in the blower compartment as shown in Fig. 7. The Sensor must be located in the airflow.
3. For air handlers without a circuit breaker in the control box (unit with fan motor sizes less than 5 hp [3.73 kW]) mount the transformer and relay inside the control box. Use the holes in the transformer base and relay base as guides to drill holes into the box and fasten components in place with supplied No. 8 x 1/2 in. sheet metal screws. See Fig. 8.
4. For air handlers with a circuit breaker in the control box (unit with fan motor sizes of 5 hp [3.73 kW] or greater), mount the supplied transformer and relay in a field-supplied and installed electrical box as shown in Fig. 8. Use the holes in the transformer base and relay base as guides to drill holes into the box and fasten components in place with supplied No. 8 x 1/2 in. sheet metal screws.

Follow the steps below to connect the economizer to the air handler control box.

1. Remove the economizer control access panel and locate the actuator wiring harness. See Fig. 9.

2. Separate the orange and green wires from the wiring harness.
   Run the remaining wires in the wiring harness through the unit’s return air opening.

3. Connect the grey wires to the supply-air temperature sensor as shown in Fig. 7.

4. Remove the air handler control box cover and connect the yellow and blue wires to TB1 (40RU/524J/FAS/FHS units) or TSTAT (40RF/524F/FAX/FHX units) terminals Y1 and Y2. See Fig. 10 for the air handler control box on 40RU/524J/ FAS/FHS units and Fig. 11 for 40RF/524F/FAX/FHX units.

5. Connect Y1 and Y2 from the condensing unit or chiller to Y1 and Y2 on air handler terminal block TB1 (40RU/524J/FAS/ FHS units) or TSTAT (40RF/524F/FAX/FHX units). Connections can be made using 1/4 in. female quick connections (inside box) or with screw terminals (outside box).
   NOTE: If the unit has a single-stage cooling, terminate the blue wire with a wire nut and secure it.

6. Route brown and red wires through the control wiring access hole in the unit corner post and connect to Y1 and Y2 from the thermostat.
   NOTE: If the unit has a single-stage thermostat, terminate the brown wire with a wire nut and secure it.

7. Connect the black wire to the transformer.

8. Using field-supplied wires, connect the economizer relay (ER) coil to air handler terminals C and G. Connect the white wire from the transformer secondary to relay common contact. Connect white wire from harness to relay normally open contact.

9. Using field-supplied wire, connect line voltage power to the transformer primary. There are taps for 200, 230, and 460-v power. (For 400-3-50 power, use the 460-v tap.) Connect the power wire to the correct tap and terminate any unused wires.

10. See the wiring diagram and controller details for outside air temperature sensor wiring.

Timeout and Screen Saver
After a period of inactivity, the controller displays the default HMI screen (free cooling status, 1FREECOOL YES or 1FREECOOL NO). HH79NZ039 DRY BULB SENSOR
Economizers are shipped standard with an HH79NZ039 outside air dry bulb sensor (see Fig. 14). 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). The sensor is factory-installed on the economizer.
NOTE: A second HH79NZ039 sensor is provided for mixed air temperature.
NOTE: California high-temperature setting requirements by region are shown in Table 4.

Enthalpy Control Sensor Configuration
The optional enthalpy control sensor (Part No.: HH57LW001) communicates with the POL 224 economizer controller using the five-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. See Fig. 16 for wiring the HH57LW001 enthalpy sensor for each option. Use Fig. 15 and Table 6 on page 9 to locate the wiring terminals for each enthalpy control sensor. For additional details see Fig. 12-13 and Table 5.

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 4 for high-limit settings.

Table 4 — California Title 24 Regional High Limit Dry Bulb Temperature Settings

DEVICE TYPE b

| CLIMATE ZONES| REQUIRED HIGH LIMIT

(ECONOMIZER OFF WHEN):

DESCRIPTION

---|---|---

FIXED DRY BULB

| 1, 3, 5, 11-16| OAT exceeds 75°F
2, 4, 10| OAT exceeds 73°F
6, 8, 9| OAT exceeds 71°F
7| OAT exceeds 69°F

DIFFERENTIAL DRY BULB

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

–2°F

6, 8, 9| OAT exceeds return air temperature

–4°F

7| OAT exceeds return air temperature

–6°F

FIXED ENTHALPY c

+ FIXED DRY BULB

| ****

All

| ****

OAT exceeds 28 Btu/lb of dry air or OAT exceeds 75°F

NOTE(S)

• This table is sourced from the 2019 California Energy Code, Title 24, Part 6, Table 140.4-E Air Economizer High Limit Shut Off Control Requirements.
• Only the high-limit control devices listed are allowed to be used 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.
• 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 approximately 6,000-foot elevation, the fixed enthalpy limit is approximately 30.7 Btu/lb.

LEGEND

• OAT — Outdoor air Thermostat
• RA — Return Air

Table 5 — Enthalpy Manual Entry Setpoints 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 & 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)

• See Fig. 13 for a map of U.S. and Canadian climate zones.
• See Fig. 12 for a map of California Title 24 zones

Table 6 — HH57LW001 Sensor Wiring Terminations

ECONOMIZER SETTINGS

Interface Overview

ECONOMIZERONE
The field-installed accessory consists of the following:

• Low Leak Economizer Assembly
• HH79NZ039 OA Dry Bulb Sensor
• HH79NZ039 Mixed Air Sensor
• POL 224 Controller
• 40RU000708 Harness

POL 224 ECONOMIZER MODULE WIRING
The economizer controller used on electromechanical units is a Siemens POL 224 which is located in the economizer accessory. See Fig. 17 for a button description of the POL 224 controller. See the Installation Instruction for the base unit location of the control box access panel. For economizer wire routing, refer to Fig. 9.
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. 17-21.
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):

• Press Enter to edit the current value or option.
• Press Enter 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.

User Interface and Keypad
The controller user interface consists of an LCD 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 desired menu items on the display. See Fig. 17.
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. 17 and 18. 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 as per 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 LCDs the value of the current submenu (if any). If the value is editable, 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. 20.

Powering The Economizer Controller
The POL 224 controller power connections are made through the economizer harness (PN: 40RU000708). Connections from the harness are made to the C (24 vac common) and R (24 vac power) terminals of the economizer controller. See Fig. 19.

LED indication
NOTE: If different faulty events occur at the same time, the sensor/DAC LED lights up following the priority below: Red Yellow Off. For example, if there is a humidity sensor error and air temperature failure at the same time, the sensor LED turns red rather than yellow. See Fig. 21 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, the LED indication might be unstable.

NOTE: QR codes in this image are for reference only.

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 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 not 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 four different control modes. In different control modes, the assessed conditions are different. See Table 8.
DEFAULT HYSTERESIS SETTING
The hysteresis setting (DB) defaults to 2°F. Refer to Fig. 22.

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). Refer to Table 8.
If MAT is used when free cooling is enabled, MAT setpoint (3MAT SET, configurable in “Parameter Settings — Advanced” on page 24) is used for MAT modulating. When MAT falls below the anti-freeze setpoint (3FRZ PROT), the damper either fully closes or opens to the minimum position (configurable in “Parameter Settings — Advanced”

• If MAT is lower than MAT setpoint, the damper is modulated to maintain MAT setpoint, towards fully closing or opens to the minimum position based on occupancy status if MAT continues dropping.
• If MAT is in the range [MAT setpoint, (MAT setpoint + neutral zone band (1°F by default))], the damper position does not change.
• If MAT is higher than (MAT setpoint + neutral zone band), the damper opens towards fully open.
• If MAT is 10°F higher than MAT setpoint, the damper fully opens to 100%.

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

• If outside air is higher than 50°F but lower than the temperature shutoff setpoint, the damper is fully open.
• If outside air is higher than the OAT lockout setpoint but lower than 50°F, linear modulation is applied when only Cooling Stage 1 input (Y1I) is ON. The result of the following formula indicates the damper’s open position:

((OAT – OAT Lockout Setpoint) / (50 – OAT Lockout Setpoint)) * (80% – MIN POS)

• MIN POS
  NOTE: When both free cooling and mechanical cooling are on, damper remains fully open regardless of the modulating logic.

LOCATION-BASED SHUTOFF SETPOINTS
The economizer controller can get the location-based temperature and enthalpy shutoff setpoints 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 connection with the mobile application. The temperature and enthalpy shutoff setpoints 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-stage cooling inputs, and reroutes to the unit 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 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 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 setpoint.

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

Control Mode 3

•      Combination of 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 setpoints.

If the outside air enthalpy is lower than the set enthalpy shutoff setpoint, and the outside air dry bulb temperature is lower than the temperature

shutoff setpoint, 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 setpoint and return air enthalpy.

If both OA enthalpy and RA enthalpy are higher than the enthalpy high limitation, 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 setpoint, then outside air can be used for economizing.

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)

If OAT MAT setpoint (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 MAT setpoint, then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2. To change the set time, configure 3STG3 DLY as desired. See Advanced Settings page 24 for more details of 3STG3 DLY.

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)

If OAT MAT setpoint, 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 MAT setpoint, 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 Advanced Settings page 24 for more details of 3STG3 DLY.

IMPORTANT: The economizer controller can tolerate thermostat 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 2 and 3-speed fans. When the unit is equipped with a multi-speed fan, the damper responds to multiple fan speeds via multiple minimum positions (MIN POS) to keep minimum airflow. Refer to 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

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)

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

LEGEND

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

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 FANb

| •      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)

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

LEGEND

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

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

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 FANb

| •      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)

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

Table 15 — Different Damper Position Settings 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)

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

COOLING DELAY VIA INCREASING FAN SPEED
If there is cooling demand while outside air is suitable for economizing, 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, mechanical cooling will be enabled.
Typical field application:

1. Prerequisites:
   • Outside air is suitable for economizing and free cooling is ON.
   • The 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 two cooling demand inputs/ outputs, Y1-Input is called, and the controller sets the fan speed to Speed Low. The damper is fully open (100%).
   • If Y2-Input is also called, 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.
   • If the cooling demand is not reached within 3STG3 DLY time and OAT is higher than MAT setpoint (3MAT SET), the controller starts Y2-Output.

DEMAND CONTROLLED VENTILATION (DVC)
If a field-installed CO2 sensor is connected to the EconomizerONE controller, a demand-controlled ventilation strategy will operate automatically. As the CO2 level in the space increases above the setpoint (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 setpoint. If the measured CO2 concentration value is below the DCV setpoint, 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 concentration value towards the DCV setpoint. 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 Unoccupied period function. Refer to Appendix B, Tables A-B “Fixed Dry-Bulb without DCV (CO2 Sensor) — 2-Speed Fan” on page 28and “Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In Conventional Mode” on page 29 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 setpoint, enthalpy- based economizing is available. Otherwise, enthalpy-based economizing is unavailable.
ANTI-FREEZE PROTECTION
The economizer controller initiates the anti-freeze protection if MAT or OAT temperature falls below the anti-freeze setpoint.
MAT-BASED ANTI-FREEZE PROTECTION

1. If MAT temperature falls below the anti-freeze setpoint (3FRZ PROT):
   • 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 OAT also fails, the controller closes the damper immediately.

OAT-BASED ANTI-FREEZE PROTECTION
If the OAT temperature falls below the OAT lockout setpoint (3OAT LOCK):

• The controller stops the compressor from running if the unit type is the conventional unit and the cooling/heating conventional operation mode is enabled
• 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 two exhaust fans can be connected to the economizer controller.

• If Exhaust Fan 1 is connected and configured, the Exhaust Fan 1 parameter group (L, M and H) is available depending on the fan configuration.
• If Exhaust Fan 2 is connected and configured, the Exhaust Fan 2 parameter group (L, M and H) is available depending on the 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 setting respectively. The selection of L, M or H matches the current fan speed.

NOTE: If terminal ACT-FB is configured, the damper position is the damper feedback position. If the feedback signal is unavailable, 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 the Climatix™ mobile application or under the menu of I/O Configuration on the inbuilt display. See “Parameter Settings — I/O Configurations” on page 24 for more information.

IMPORTANT: On the call of cooling when the controller is configured to receive signal from the thermostat but the thermostat 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, the damper is fully open.

PRE-OCCUPANCY PURGE
The Pre-Occupancy purge demand comes from the configuration of the Auxiliary features in the Climatix™ mobile application or 6AUX2-I under the menu of I/O Configuration on the inbuilt 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 economizing. If outside air is suitable for economizing, the damper is fully open.

AIRFLOW COMMISSIONING
The airflow measurement station (differential pressure signal) can connect to the controller temporarily to run airflow commissioning to calculate, calibrate, and store four fan speed characteristic curves automatically at damper positions 40%, 60%, 80% and 100%. The controller places the damper in a proper position to meet the 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 cooling 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 reportable information:

• The sensor disconnected or has no signal.
• Sensor short or high signal (under range or over range).
• Not economizing.
• Unexpected economizing.
• Excess outdoor air.
• The damper not modulating.
• Input power monitor and brownout. After detecting 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 indicates how many times the actuator has cycled. It is resettable via HMI item 8ACT CNT RESET.

IMPORTANT: The first six faults are detectable via LEDs or alarm reports on the LCD. See LED Indication on page 12 and Alarms on page 25 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 the firmware update. All the previous configuration data are erased after the firmware update. NOTE: Contact Application Engineering for more information on support for firmware.

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

MOUNTING, INSTALLATION, AND WIRING

CAUTION
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. 23 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 requirements and graphical mounting instructions.
Mounting Devices Connected to the Economizer Controller
Devices like damper actuators, sensors (temperature sensor, humidity 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 devices, 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)

•      Preoccupancy

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)

•      Preoccupancy

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 a 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 a commercial thermostat
29| C| COM| 24 vac Common
30| R| 24 vac| 24 vac Power

Connecting Peripheral Devices to the Economizer Controller
Refer to Fig. 24-29 for wiring details.

SETUP AND CONFIGURATION

IMPORTANT: Before setup and configuration, it is recommended to obtain some location-based values, such as shutoff points, or utilize the location services in the Climatix™ mobile 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 the sensor, compressor, thermostat, or actuator is connected to the economizer controller, values/statuses are displayed in the Operating section 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 modifying the corresponding parameter values in the local device or mobile application. See Tables 17-24 for a complete list of all parameters on the LCD. Refer to it during the setup and 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 configured. See Tables 17-24.

IMPORTANT: Not all operations are available on the local POL 224. For example, users can only obtain shutoff setpoints 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 for 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®a and Yabe.exe via BACnet™a 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 of 4000 ft (1.2 km).

NOTE(S)

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

Table 17 — Status Display

YES NO

1ECON ENABLE| 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 a 24-v signal from OCC input, the value is YES. Otherwise, the value is

NO.

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

ON OFF

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

Dynamic item. Appears only if the Y2-Out terminal is configured.

1AUX1- I| Aux1-In signal.

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

1AUX1- O| Aux1-Out signal.

Dynamic item. Appears only if the Aux1-Out terminal is configured.

1AUX2- I| Aux2-In signal.

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

1AUX2- O| Aux2-Out signal.

Dynamic item. Appears only if the Aux2-Out terminal is configured.

1COMP STAGE

| ****

Indicates compressor current stage.

| Off 1

2

3

1HEAT ENABLE| 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 setpoint

(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 an 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 setpoint and OFF

if below the DCV setpoint.

| ****

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 the I/O Configuration Table.

| ****

L H

1ACT OUT| Indicates the current position of the 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 the current position of the damper actuator in % Open.
1ACT CNT| Indicates many times the 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 the month, date and year.| —

Table 18 — Parameter Settings — Basic

2 TEMP OFF

| Temperature shutoff setpoint 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

setpoint.

| ****

48…80°F, increment by 1

| ****

63°F

2ENTH OFF

| Enthalpy shutoff setpoint 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 setpoint.

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

| ****

22…30 Btu/LBM, increment by 1

| ****

28 Btu/LBM

2DVC

| Demand-controlled ventilation setpoint 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 setpoint.

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

| ****

300…2000PPM, increment by 100

| ****

1100PPM

2FAN L ACT

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

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

| ****

2…10V

| ****

3.6V

2FAN H ACT

| Damper minimum position when the 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 the 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 the 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 the 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 the 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 a 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 DAY| 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 OPEN| 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 a 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| Setpoint of MAT or LAT sensor.| 38…70°F, increment by 1| 53°F
3FRZ PROT| Anti-freeze protection setpoint of MAT sensor.| 35…55°F, increment by 1| 45°F
3OAT LOCK| OAT lockout setpoint 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 the 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 a 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 the 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 the 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 Parameters,b

disconnected.
4CO2 SEN ALARM| The 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 setpoint.
4RTU SHUTDOWN| Notification of Shutdown Active when SHUTDWN is chosen for 6AUX1-I or 6AUX2-I.
4ACTUATOR ALARM| The actuator gets disconnected or has failed.
4ACT UNDER V| The voltage received by the actuator is below the expected range.
4ACT OVER V| The voltage received by the actuator is above the expected range.
4ACT STALLED| The damper actuator stopped before achieving a commanded position.
4ACT SLIPPING| The damper actuator slips after reaching the commanded position.
4NOT ECON| Not Economizing when it should.
4ECON SHOULDN’T| 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 lower than the low limit (3LAT LOW).
4HLA ALARM| Leaving air temperature higher than the high limit (3LAT HIGH).
4HEAT ALARM| Economizer heating error.
4COOL ALARM| Economizer cooling error.

NOTE(S)

• All alarms are dynamic items. An alarm appears only if a related symptom mentioned above is detected.
• An alarm activation triggers a general alarm, and 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 the damper to the minimum position.
7DAMPER CLOSE| Press Enter to test if the economizer controller can drive the damper to 100% Closed.
7DAMPER OPEN| Press Enter to test if the economizer controller can drive the 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 the 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 the AUX1-O connection (close or open relay AUX1-O).
7AUX2- O| Press Enter to test the 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| The 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 the Occupied mode operation of the 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” on page 27 for damper position control and other troubleshooting. During Occupied mode operation, indoor fan operation will be accompanied by economizer dampers moving to the Minimum Position setpoint for ventilation. If the indoor fan is off, the dampers will close. During Unoccupied mode operation, dampers will remain closed unless a Cooling (by free cooling) or DCV demand is received. When free cooling using outside air is not available, the unit cooling sequence will be controlled directly by the space thermostat. The 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 appropriate changeover command (dry bulb, outdoor enthalpy, differential 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 unit supply air temperature. The default supply temperature is 53°F (12°C), with a range of 38°F to 70°F (3.3°C to 21.1°C). The compressor 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. Dampers will modulate to maintain SAT at the 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 the Minimum Damper position if the indoor fan is running or fully closed if the fan is off. If an accessory power exhaust is installed, the power exhaust fan motors will be energized by the economizer control as the dampers open above the EXH1 SET setpoint and will be energized as the dampers close below the EXH1 SET setpoint. 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 the Minimum Position setpoint for ventilation. If an indoor fan is off, the dampers 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 27, Appendix B “SEQUENCE OF OPERATION EXAMPLES” on page 28, and Appendix C “MODBUS / BACNET ADDRESSES” on page 31 for Troubleshooting operation issues.

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.

The 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 enable anti-freeze protection.

OA temp is too high or too humid

| In DIFF mode, even though the OA temperature is lower than the 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.

The economizer controller/ mechanical cooling is not operating

| ****

No input power

| Use a multimeter 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’s secondary side, then check the primary line voltage to the transformer.

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

Brownout

| If the 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.

The 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 the 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 vacuum power supply.

Firmware Update Failure

| The application file is damaged, the 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 16, or change a USB flash disk. Contact the service provider if failure

still exists.

Free Cooling LED is solid RED| Sensor, damper, or whole working system may not work properly| Check the 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 the 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 the 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 the 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 — 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/Offa,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/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
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/Offa,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)

• If Y2I is ON for more than a set time (15 minutes by default) and the OAT is greater than MAT setpoint (3MATSET), Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.
• Configure 3STG3 DLY under Advanced Settings on page 24 to change to another set time.

APPENDIX B — SEQUENCE OF OPERATION EXAMPLES (CONT)
Table C — Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In Conventional Mode

or 2) a**

CONVENTIONAL

| ****

Cooling

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

Yes

| ****

N/A

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

No

| ****

Yes

| ****

N/A

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

Yes

| ****

Yes

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

SP| On| On| On| On/Off| VENT MIN H to 100%| On
£ SP| On| Off| Off| Off| VENT MIN L or 100%| On
£ SP| On| On| On| On/Off| VENT MIN H or 100%| On
No| No| N/A| 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

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

---

Heating

| No| N/A| N/A| 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

---

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)

• Exhaust Fan — one or two exhaust fans can be connected to the economizer controller.
• Setpoint — Demand-controlled ventilation setpoint.
• 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
• If Y2I is ON for less than a set time (15 minutes by default), Relay 2 is OFF. If Y2I is ON for more than a set time and the OAT is greater than the MAT setpoint (3MAT SET), Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.

APPENDIX B — SEQUENCE OF OPERATION EXAMPLES (CONT)
Table C — Fixed Dry-Bulb with DCV (CO2 Sensor) — 2-Speed Fan In Conventional Mode (cont)

) 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/Offb
SP| On| On| On| On| VENT MIN H to VENT MAX H| On/Offb
£ 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| N/A| Off| Off| Off| Off| Closed| Off
No| Yes| N/A| On| Off| Off| Off| Closed to 100%| On
On| On| On| On/Off| 100%| On
No| No| N/A| On| Off| On| Off| Closed| Off
On| On| On| On| Closed| Off

Heating

| ****

No

| ****

N/A

| ****

N/A

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

NOTE(S)

• Configure 3STG3 DLY under Advanced Settings to change to another set time.
• 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.
• If Y2I is ON for less than a set time (15 minutes by default), Relay 2 is OFF. If Y2I is ON for more than a set time and the OAT is greater than the MAT setpoint (3MAT SET),
• Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.

APPENDIX C — MODBUS / BACNET ADDRESSES

REGNO (ADR+1)| FUNCTION CODE| REGISTER- NAME| PARAMETER IN HMI| BACNET ADDRESS
---|---|---|---|---
1001| 04 Read Input Register| OATP| 1OAT PRES| AV:347
1003| 04 Read Input Register| RAP| 1RAT PRES| AV:348
1005| 04 Read Input Register| OAHU| 1OAH PRES| AV:351
1007| 04 Read Input Register| RAHP| 1RAH PRES| AV:365
1009| 04 Read Input Register| MAP| 1MAT PRES| AV:349
1011| 04 Read Input Register| DP| N/A; Corresponding BACnet object name is DP and analog value is 367.| AV:367
1013| 04 Read Input Register| CO2P| 1CO2 PRES| AV:366
1015| 04 Read Input Register| 4DAFB| 1ACT POS| AV:350
1017| 04 Read Input Register| 4DAPP| N/A; Corresponding BACnet object name is 4DAPP and analog value is 316.| AV:316

1019

| ****

04 Read Input Register

| ****

AO_2_1

| N/A; Corresponding BACnet object name is AO_2_1 and analog output is 11.

Related HMI item: 1VFD SPD

| ****

AO:11

1021| 04 Read Input Register| 1DCV| 2DCV| AV:339
1023| 04 Read Input Register| 2MTS| 3MAT SET| AV:357
1025| 04 Read Input Register| 2ERV| 2ERV SET| AV:346
1027| 04 Read Input Register| 2FRZ| 3FRZ PROT| AV:358
1029| 04 Read Input Register| 2CF| 2FAN| AV:95
1031| 04 Read Input Register| 1TSO| 2TEMP OFF| AV:489
1033| 04 Read Input Register| 1ESO| 2ENTH OFF| AV:490
1035| 04 Read Input Register| ControlMode| N/A; the Corresponding BACnet object name is ControlMode and the analog value is 329| AV:329
1201| 04 Read Input Register| 4OCC| 1OCCUPIED| BV:209
1202| 04 Read Input Register| 4Y1I| 1Y1-IN| BV:210
1203| 04 Read Input Register| 4Y2I| 1Y2-IN| BV:208
1204| 04 Read Input Register| 1AUX1-I| 1AUX1-I| BV:219
1205| 04 Read Input Register| 1AUX2-I| 1AUX2-I| BV:217
1206| 04 Read Input Register| 4Y1O| 1Y1-OUT| BV:211
1207| 04 Read Input Register| 4Y2O| 1Y2-OUT| BV:213
1208| 04 Read Input Register| 1AUX1-O| 1AUX1-O| BV:218
1209| 04 Read Input Register| 1AUX2-O| 1AUX2-O| BV:229
1210| 04 Read Input Register| 4FRE| 1FREECOOL| BV:262
1211| 04 Read Input Register| 4ECO| 1ECON ENABLE| BV:257
1212| 04 Read Input Register| 4HEAT| 1HEAT ENABLE| BV:261
1213| 04 Read Input Register| 5GeneralAlarm| NO ALARM| BV:245
1501| 03 Read Holding Register 16 Write Multiple Registers| 1DCV| 2DCV| SEE 1021 ABOVE
1503| 03 Read Holding Register 16 Write Multiple Registers| 2MTS| 3MAT SET| SEE 1023 ABOVE
1505| 03 Read Holding Register 16 Write Multiple Registers| 2ERV| 2ERV SET| SEE 1025 ABOVE
1507| 03 Read Holding Register 16 Write Multiple Registers| 2FRZ| 3FRZ PROT| SEE 1027 ABOVE
1509| 03 Read Holding Register 16 Write Multiple Registers| 2CF| 2FAN| SEE1029 ABOVE
1511| 03 Read Holding Register 16 Write Multiple Registers| 1TSO| 2TEMP OFF| SEE 1031 ABOVE
1513| 03 Read Holding Register 16 Write Multiple Registers| 1ESO| 2ENTH OFF| SEE 1033 ABOVE

CONTACT

• The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations
• Catalog No. 04-53400079-01
• Printed in U.S.A.
• Form IIK-CRECON-AHU-01 Rev. A

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