IIK CRECON-SRT-01 Vertical Horizontal Low Leak Ultra Low Leak Economizer ONE Accessory Instruction Manual

IIK CRECON-SRT-01 Vertical Horizontal Low Leak Ultra Low Leak Economizer

ONE Accessory

Product Information

The Vertical/Horizontal Low Leak/Ultra Low Leak EconomizerONE is an accessory designed for small rooftop units with a capacity of 3 to 12.5 tons. It is available in multiple models with different part numbers: CRECOMZR101A00, CRECOMZR102A00, CRECOMZR103A00, CRECOMZR104A00, CRECOMZR105A00, CRECOMZR106A00, CRECOMZR107A00, and CRECOMZR108A00.

The economizer is used to improve the energy efficiency of the rooftop unit by allowing outside air to be used for cooling and ventilation when conditions are favorable. It can be installed in both vertical and horizontal units.

Product Usage Instructions

1. Safety Considerations: Before installing or servicing the economizer, it is important to consider safety precautions. Wear appropriate protective clothing, safety glasses, and gloves to avoid personal injury. Be cautious of sharp edges or burrs on sheet metal parts.
2. Compliance: Ensure that the installation of the economizer complies with all applicable safety and building codes.
3. Economizer Installation: Follow the installation instructions provided in the user manual. The manual should include step-by-step instructions, diagrams, and any necessary tools or equipment required for installation.
4. Installing Optional Single Module: If desired, install the optional HH57LW001 single module as per the provided instructions.
5. Mounting Devices Connected to the Economizer Controller: If there are any additional devices that need to be connected to the economizer controller, follow the instructions provided in the manual.
6. Connecting Peripheral Devices to the Economizer Controller: If there are any peripheral devices that need to be connected to the economizer controller, follow the instructions provided in the manual.
7. Setup and Configuration: Once the economizer is installed, follow the setup and configuration instructions provided in the manual.
8. Start-Up: After setup and configuration, follow the start-up instructions to ensure the proper functioning of the economizer.
9. Cooling with EconomizerONE System: Refer to the user manual for specific instructions on how to use the economizer for cooling purposes.
10. Heating with EconomizerONE System: Refer to the user manual for specific instructions on how to use the economizer for heating purposes.
11. Troubleshooting: If any issues arise with the economizer, refer to Appendix A in the user manual for troubleshooting guidance.
12. A Sequence of Operations: Appendix B in the user manual provides a detailed sequence of operations for the economizer.
13. Modbus Addresses: Appendix C in the user manual lists the Modbus addresses associated with the economizer.

Note: It is essential to read and understand the complete user manual before attempting to install or use the accessory economizer.

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 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 which 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.

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, and equipment cycling by operating the compressors when the outdoor air tem-perature is too warm, integrating the compressor with outdoor air when free cooling is available, and locking out the compressor when outdoor air temperature is too cold. Demand controlled ven-tilation is supported. The EconomizerONE system can be used with 1 and 2-speed units.
• The EconomizerONE system utilizes gear-drive technology with a direct-mount spring return actuator that will close upon loss of power. The EconomizerONE system comes standard with an out-door air temperature sensor, mixed air temperature sensor (also called supply air temperature sensor). Outdoor enthalpy, indoor (return) dry bulb or enthalpy, and CO2 sensors are available for field installation. Standard barometric relief dampers provide nat-ural 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 and 2 for package usage. See Tables 3 and 4 for package contents. See Table 5 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 manda-tory 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, and IECC 2015 section C403.2.4.7 for Fault Detection and Diagnostic requirements. NOTE: IECC 2015 section C403.2.4.7.1 requires differential return air sensor, which must be ordered separately. Outside air and return air (volume) dampers are AMCA rated.

Table 1 — Economizer Usage — Vertical Units

EconomizerONE ACCESSORY KIT NUMBER| ****

MODEL NUMBER

---|---

SMALL CABINET UNITS

CRECOMZR101A00 (LL), CRECOMZR103A00 (ULL)

| 48FC/50FC/50FCQ 04-07
---|---
48GC/50GC/50GCQ 04-06
582K/559K/547K 04-07
581K/551K/549K 04-06
RGV/RAV/RHV 036-072
RGW/RAW/RHW 036-060

LARGE CABINET UNITS

CRECOMZR105A00(LL), CRECOMZR107A00 (ULL)

| 48/50FC 08-14
---|---
50FCQ 08-12
48/50GC 07-12
50GCQ 07-09
582K/559K 08-14
547K 08-12
581K/551K 07-12
549K 07-09
RAV/RGV 090-150
RHV 090-120
RAW/RGW 072-120
RHW 072-102

LEGEND

• LL — Low Leak Economizer
• ULL — Ultra-Low Leak Economizer

Table 2 — Economizer Usage — Horizontal Units

SMALL CABINET UNITS

CRECOMZR102A00 (LL), CRECOMZR104A00 (ULL)

| 48FC/50FC/50FCQ 04-07
---|---
48GC/50GC/50GCQ 04-06
582K/559K/547K 04-07
581K/551K/549K 04-06
RGV/RAV/RHV 036-072
RGW/RAW/RHW 036-060

LARGE CABINET UNITS

CRECOMZR106A00 (LL)

| 48/50FC 08-14
---|---
50FCQ 08-12
48/50GC 07-12
50GCQ 07-09
582K/559K 08-14
547K 08-12
581K/551K 07-12
549K 07-09
RGW/RAW 072-120
RHW 072-102
RGV/RAV 090-150
RHV 090-120

CRECOMZR108A00(ULL)

| 48/50FC 08-14
582K/559K 08-14
RGV/RAV 090-150

LEGEND

• LL — Low Leak Economizer
• ULL — Ultra-Low Leak Economizer

Table 3 — Package Contents — Vertical Units

EconomizerONE ACCESSORY KIT NUMBER| ****

QTY

| ****

DESCRIPTION

---|---|---

CRECOMZR101A00 (LL)

| ****

1

| 48TM000562 Low Leak Vertical Economizer with HF23BL004 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TC006123 Hood Assembly with 50HJ540574 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR103A00 (ULL)

| ****

1

| 48TC004998 Ultra Low Leak Vertical Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TC006123 Hood Assembly with 50HJ540574 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR105A00 (LL)

| ****

1

| 48TM007424 Low Leak Vertical Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TM404600 Hood Assembly with 50HJ540575 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR107A00 (ULL)

| ****

1

| 48TM007423 Ultra Low Leak Vertical Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TC004600 Hood Assembly with 50HJ540575 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

LEGEND

• LL —      Low Leak Economizer
• ULL —     Ultra-Low Leak Economizer

Table 4 — Package Contents — Horizontal Units

EcomomizerONE ACCESSORY KIT NUMBER| ****

QTY

| ****

DESCRIPTION

---|---|---

CRECOMZR102A00 (LL)

| ****

1

| 48TM006055 Low Leak Horizontal Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48HC400238 Hood Assembly with 50HJ540610 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR104A00 (ULL)

| ****

1

| 48TC006054 Ultra Low Leak Horizontal Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TC006056 Hood Assembly with 50HJ540610 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR106A00 (LL)

| ****

1

| 48TM009243 Low Leak Horizontal Economizer with HF23BL005 Actuator Motor and 48TC004997 Economizer harness plug
1| 48TM404543 Hood Assembly with 50HJ540611 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

CRECOMZR108A00 (ULL)

| ****

1

| 48TM009244 Ultra Low Leak Horizontal Economizer with HF23BL005,Actuator Motor and 48TC004997 Economizer harness plug
1| 48TM008114 Hood Assembly with 50HJ540611 Aluminum Filter

1

| Hardware Package contains one each of the following:

– HH63LW001 POL 224 Economizer Controller

– 48TC005897 POL 224 Economizer Harness

– HH79NZ039 Dry Bulb Temperature Sensor Assembly

LEGEND

• LL — Low Leak Economizer
• ULL — Ultra-Low Leak Economizer

Table 5 — EconomizerONE Sensor Usage

APPLICATION

| EconomizerONE WITH OUTDOOR AIR DRY BULB SENSOR (ACCESSORIES REQUIRED)
---|---

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 CO2 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):

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

ECONOMIZER INSTALLATION

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

2. Remove the existing unit filter access panel. Raise the panel and swing the bottom outward. The panel is now disengaged from the track and can be removed. (See Fig. 2.)

3. Remove the indoor coil access panel. (See Fig. 2.)
   NOTE: Save the filter access and indoor coil access panels for future use in the event that the EconomizerONE assembly is ever removed.

4. For vertical installations — Slide the EconomizerONE assembly into the unit as shown in Fig. 3. Be sure to engage the rear EconomizerONE flange under the tabs on the unit base in the Return Air opening as shown in Fig. 4. Continue at Step 8.

5. For horizontal installations — Locate Mixed Air Temperature Switch (MTS) with its bracket on left side of the unit. Remove left filter to access MTS bracket screws. Remove screws and relocate the bracket with MTS on the next set of holes up, having the bracket now above the opening of the fil-ter access opening.

   • See Fig. 5 for the following 6 and 7.5-ton units:
   • 48/50FC 08, 50FCQ 08, 48/50GC 07, 50GCQ 07
   • 582K/559K 08, 547K 08, 581K/551K 07, 549K 07
   • RAV/RGV 090, RHV 090, RAW/RGW 072, RHW 072
   • See Fig. 6 for the following 7.5 to 12.5 ton units:
   • 48/50FC 09-14, 50FCQ 09-12, 48/50GC 08-12,50GCQ 08-09
   • 582K/559K 09-14, 547K 09-12, 581K/551K 08-12, 549K 08-09
   • RAV/RGV 102-150, RHV 102-120, RAW/RGW 090-120, RHW 090-102
   • Slide the EconomizerONE assembly all the way back and into the horizontal R/A (Return Air) opening. (See Fig. 7.)

6. Attach O/A (Outside Air) panel, included in O/A hood kit, over the panel opening, then lift the economizer. Match the ID (inside dimension) of the panel with the ID of the economizer, then attach using provided screws. (See Fig. 8.)

   • If the EconomizerONE system will be operating with an enthalpy outside air sensor, remove the factory installed HH79NZ039 dry bulb sensor from the front face of the economizer (see Fig. 1), and install the accessory enthalpy sensor HH57LW001 in the same location. Connect the (5) wire harness with plug from the EconomizerONE assembly to the enthalpy sensor. See page 9 for wiring diagram. Refer to INSTALLING OPTIONAL HH57LW001 SINGLE OUTSIDE AIR ENTHALPY SENSOR” on page 10 section for more details on enthalpy settings.
   • Remove and save the 12-pin jumper plug from the unit economizer harness located in the upper left corner of the unit.
   • Insert the EconomizerONE plug into the unit wiring harness. (See Fig. 9.)
   • NOTE: The 12-pin jumper plug should be saved for future use, in the event that the EconomizerONE assembly is ever removed. The jumper plug is not needed as long as the EconomizerONE is installed

7. For vertical installations — Install the outside air hood over the economizer in place through pre-punched holes. Reinstall the unit’s filter access panel. Continue at Step 16. For horizontal hood installation see Steps 11-15.

   • NOTE: Steps 11-15 apply to horizontal units only.

8. Attach filter panel above O/A panel. Slide under RTU (Packaged Rooftop Unit) top flange then drop down until bottom mount holes align with top holes on O/A panel. Fasten with provided sheet metal screws. (See Fig. 10.)

9. Install the O/A hood to the O/A panel over the Economizer assembly. Use screws provided. (See Fig. 10.)

10. Attach the R/A blank off panel, included with horizontal economizers for large units only (see Table 2). See Fig. 11. Grommet must be installed before duct work is installed.

11. Attach the O/A hood assembly to the O/A panel with included screws. (See Fig. 10.)

12. Install provided barometric relief hood on field installed R/A duct ensuring it is water tight. (See Fig. 12.)

13. Remove the indoor blower access panel and the panel(s) covering the unit control box. (See Fig. 13.) In the hardware kit provided with the EconomizerONE is the POL 224 controller.

14. Mount the controller assembly on the left side of the unit control box. Screw the controller to the control box through pre punched holes in control box. (See Fig.14.)

15. Unplug the 12-pin female ECON plug currently connected to the Unit Control Board (UCB). (See Fig. 15.)

16. Connect the 12-pin female ECON plug removed from the

17. UCB to the 12-pin male plug from the controller harness.

18. Refer to Fig. 16 and the wiring diagram on.

19. Connect the 12-pin female plug from the controller harness to ECON on the UCB. Refer to Fig. 17 and wiring diagram on.)

20. Connect the brown wire from the controller harness to the UCB. Refer to economizer wiring diagram on page 9. The brown wire connects to “C”, on the UCB.

21. Locate the 4 wires labeled (Supply Air Thermostat) SAT and (Outdoor Air Thermostat) OAT, connected to the controller harness.

22. Route the 4 wires through the divider between the control box and the indoor blower section. (See Fig. 18.)

23. The supply air temperature sensor may look like an eyelet terminal with wires running to it (HH79NZ039). The sensor is located on the “crimp end” and is sealed from moisture.

    • Mount the supply air temperature sensor (provided) to the fan deck, near the right hand side corner post. Connect the sensor red and black wires to the orange and brown wires from the controller. (See Fig.18.)

24. Connect the pink and violet wires routed from the controller harness to the pink and violet terminals in the wire bundle in the indoor blower section. (See Fig. 19.)

25. If using differential return sensor or (demand controlled ventilation)

    • DCV sensor, install this now. Refer to Table 7 for Sensor Usage and Table 6 for Enthalpy Manual Entry Setpoints details. Refer to page 18 for Damper settings. See installation details on page 19.

26. Re-install the Indoor blower access panel. (See Fig. 13.)

27. After powering unit controller, program the POL 224 controller.

    • After all settings have been made, re-install the unit control box panel. (See Fig. 13.)

28. Install the filter by opening the filter clips which are located underneath the hood top. Insert the aluminum filter into the bottom filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filter into place. (See Fig. 20.)

    • Economizer performance charts are shown in Fig. 21 and 22 on page 10. See base unit installation manual to make adjustments to meet building ventilation requirements.

INSTALLING OPTIONAL HH57LW001 SINGLE OUTSIDE AIR ENTHALPY SENSOR

• When using the HH57LW001 enthalpy sensor (see Fig. 26) for outside air changeover, the existing HH79NZ039 dry bulb sensor (see Fig. 25) must be removed. The enthalpy sensor will be mounted in the same location as the dry bulb sensor (see Fig. 1).
• When the enthalpy sensor’s OA (Outside Air) temperature, enthalpy and dew point are below the respective setpoints, the outside air can be used for free-cooling. When any of these are above the setpoint, free-cooling will not be available. Enthalpy setpoints are configurable and create an enthalpy boundary according to the user’s input. For additional details see Fig. 23-24 and Table 6.
• 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 (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. 19 for wiring the HH57LW001 enthalpy sensor for each option. Use Fig. 26 and Table 8 on page 13 to locate the wiring terminals for each enthalpy control sensor.

Table 6 — 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):

• a. See Fig. 19 for map of U.S. and Canada climate zones.
• b. See Fig. 20 for map of California Title 24 zones
• Economizers are shipped standard with an HH79NZ039 outside air dry bulb sensor (see Fig. 25). 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 high temperature setting requirements by region are shown in Table 7.
• ENTHALPY SETTINGS (ENTHALPY OPTION)
• If installing the optional HH57LW001 enthalpy sensor 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. See Fig. 19 for wiring connections.
• Refer to Fig. 26 and Table 8.

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 change over. The temperatures vary by the region within California. See Table 7 for high limit settings.

Table 7 — 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 airb or OAT exceeds 75°F

NOTE(S):

• a. This table 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 approximately 6,000 foot elevation, the fixed enthalpy limit is approximately 30.7 Btu/lb

LEGEND

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

Table 8 — 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
• 48TC005897 Harness

POL 224 ECONOMIZER MODULE WIRING

• The economizer controller used on electromechanical units is a Siemens POL 224 which is to be located the RTU base unit’s con-trol box. See Fig. 27 for button description of the POL 224 con-troller. See the Installation Instruction for the base unit location of the control box access panel. Refer to Fig. 13.

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. 27-30.
2. Operation button (Up button) – Move to the next 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.
• d. Press Enter + Down to jump down one entire category.

User Interface and Keypad

• The 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 desired menu items on the display. Interface can be accessed with
• Android/IOS app but WiFi stick is needed. See Fig. 27.
• NOTE: Contact Application Engineering for more information on the WiFi stick accessory.

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 LCD displays the value of the current submenu (if any). If the value is editable, pressing Enter will put the terminal in the 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. 29.

Powering The Economizer Controller

• Connect a 24 Vac external power supply source to the following terminals to power the Economizer Controller. See Fig. 28.

LED indication

• NOTE: If different faulty events occur at the same time, 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. 30 and Table 9.
• 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

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

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

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 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

Table 9 — 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 di-rectly. 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 10.
• DEFAULT HYSTERESIS SETTING
• Hysteresis setting (DB) defaults to 2°F. Refer to Fig. 31.

DAMPER MODULATION DURING FREE COOLING

• Once outside air is suitable for free cooling, the controller modu-lates the damper based on MAT (mixed air temperature, default) or OAT (outside air temperature). Refer to Table 10.
• If MAT is used when free cooling is enabled, MAT setpoint (3MAT SET, configurable in “Parameter Settings — Advanced” on page 27) 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 “Param-eter Settings — Advanced” on.

1. If MAT is lower than MAT setpoint, the damper is modulated to maintain MAT setpoint, towards fully closes or opens to the minimum position based on occupancy status if MAT continues dropping.
2. If MAT is in the range [MAT setpoint, (MAT setpoint + neutral zone band (1°F by default))], the damper position does not change.
3. If MAT is higher than (MAT setpoint + neutral zone band), the damper opens towards fully open.
4. 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:

1. If outside air is higher than 50°F but lower than the tempera-ture shutoff setpoint, the damper is fully open.
2. If outside air is higher than OAT lockout setpoint but lower than 50°F, linear modulation is applied when only Cooling Stage 1 input (Y1I) is ON. 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 location-based temperature and enthalpy shutoff setpoints automatically if it is connected to the Climatix1 Mobile application. Once a WLAN stick is plugged in, the Economizer Controller can establish network connection with the Climatix Mobile application. The temperature and enthal-py shutoff setpoints obtained via the phone or tablet’s GPS func-tionality 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 RTU through the relay connec-tion Y1, Y2 and AUX1/AUX2.
• The operation of the cooling stages is determined by the availabil-ity of Free Cooling provided by the economizer operation mode. See Cooling Stage I/O Logic Tables 11-12. 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 ener-gizes the AUX1/AUX2 input to the Economizer Controller.
• Third-party trademarks and logos are the property of their respective owners.

Table 10 — 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 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 11 — 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 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. If you want to change to another set time, configure 3STG3 DLY as desired. See Advanced Settings page 27 for more details of 3STG3 DLY.

Table 12 — 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. If you want to change to another set time, configure 3STG3 DLY as desired. See Advanced Settings page 27 for more details of 3STG3 DLY.
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 2 and 3-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. Refer to Tables 13-15.
Table 13 — 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 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 14 — 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, it opens directly on the call of cool-ing/heating. The damper position is PosH.
• 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, each fan speed corresponds to two damper position ventilation setpoints (VENT
• MIN, VENT MAX), e.g., PosL corresponds to 2VENTMIN L… 2VENTMAX L. Refer to Table 16.
• If CO2 sensor is connected but DCV is disabled, each fan speed corresponds to one minimum damper position ventilation setpoint.
• Refer to Table 17.

Table 15 — 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

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

2-SPEED FAN b

| •     PosH (regardless of cooling demand, OCC=Yes)| •     PosL

(0 or 1 cooling demand)

•     PosH

(2 cooling demands)

| •    PosL4

(0 or 1 cooling demand)

•     PosH

(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 16 — 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 17 — 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 econo-mizing, 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

Prerequisites:

• Outside air is suitable for economizing and free cooling is ON.
• Fan connected to the controller supports multiple speeds. Cooling delay function doesn’t work if only a one-speed fan is connected to the controller.
• If it is a 2-speed fan and there are two cooling demand inputs/outputs, Y1-Input is called, the controller sets fan speed to Speed Low. Damper is fully open (100%).
• a. If Y2-Input is called too, 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 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 strat-egy will operate automatically. As the CO2 level in the space in-creases above the setpoint (on the EconomizerONE controller), the minimum position of the dampers will be increased propor-tionally, 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 val-ue 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 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 No DCV (CO2 Sensor) – 2-Speed Fan” on page 31 and “Fixed Dry-Bulb With DCV (CO2 Sensor) – 2-Speed Fan In Con-ventional Mode” on page 32 for controls and command operation.

HIGH HUMIDITY LIMITATION

• The Economizer Controller applies high limit of humidity to enthalpy-based economizing. When the OA dew point is below the dew point setpoint, enthalpy-based economizing is avail-able. 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

• If MAT temperature falls below the anti-freeze setpoint (3FRZ PROT),
• The controller closes both damper and compressor if unit type is conventional unit and cooling/heating conventional operation mode is enabled.
• The controller closes the damper if unit type is heat pump and heat pump operation mode is enabled.
• If the MAT sensor fails, MAT is substituted by OAT to continue the anti-freeze assessment. If OAT fails too, the controller closes the damper immediately.

OAT-BASED ANTI-FREEZE PROTECTION

• If OAT temperature falls below the OAT lockout setpoint (3OAT LOCK):
  The controller stops the compressor from running if unit type is conventional unit and cooling/heating conventional operation mode is enabled

• The controller compressor is by-passed if unit type is 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, Exhaust Fan parameter group (L, M and H) is available depending on fan configuration.
• If Exhaust Fan 2 is connected and configured, Exhaust Fan
• 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 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 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 Climatix
• Mobile or under the menu of I/O Configuration on the inbuilt display.
• See “Parameter Settings — I/O Configurations” on page 27 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 Climatix Mobile 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

• 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 to a proper position to meet minimum or any other airflow requests in cfm. You can enable this function only from the mobile app if the related function is available in your current mobile app 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:
• 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 detecting brownout, the Economizer Controller enters the brownout protection mode and disables all of the relay outputs.
• Anti-freeze notifications.
• Shutdown notifications.
• Actuator errors.
• Too low or too high leaving air temperature.
• Cooling/heating error.
• Damper actuator cycle count. Parameter 1ACT CNT indicates the number of 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 15 and Alarms on page 28 for fault indications. These faults can also be displayed in the Operating section of the Climatix Mobile app.

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, you 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

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. Refer to Fig. 32 and Table 18 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 18 — 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 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

• Refer to Fig. 33-38 for wiring details

SETUP AND CONFIGURATION

• IMPORTANT: Before setup and configuration, it is recommend-ed 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 Mo-bile app or the inbuilt display. After sensor, compressor, thermo-stat or actuator is connected to the Economizer Controller, values/statuses are displayed in the Operating section of the Climatix Mobile application and on the LCD. You can manually change basic and advanced settings, configure I/Os and test the damper operation and any configured outputs by modifying the corre-sponding parameter values in the local device or Climatix mobile application. Refer to Tables 19-26 for complete list of all parame-ters that you can find on the LCD display. Refer to it during your setup and configuration process.
• NOTE: Parameters and display menus may display differently/dynamically if different applications are configured. Refer to Tables 19-26.
• IMPORTANT: Not all operations are available on the local POL 224. For example, you 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 Climatix mobile application are unavailable. Check the Climatix 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 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 of 4000 ft (1.2 km).

Table 19 — Status Display

YES NO

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

1OCCUPIED

| Indicates if the space is occupied. If you choose ALWAYS for 6OCC when configuring I/Os, the parameter value is YES ; if you keep the default selection T-STAT for 6OCC and the controller receives 24V 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 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 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 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 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 20 — 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 WLAN stick plugged into the Economizer Controller and the 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 WLAN stick plugged into the Economizer Controller and the 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 WLAN stick plugged into the Economizer Controller and the 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 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 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 21 — 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| 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 22 — 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 doesn’t 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 doesn’t 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 23 — Alarm Parameters,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 setpoint.
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 24 — 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 25 — Enter Running State

reset.
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 26 — 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 for damper position control and other troubleshooting.
• During Occupied mode operation, indoor fan operation will be ac-companied by economizer dampers moving to Minimum Position setpoint for ventilation. If indoor fan is off, 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 cool-ing 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 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. Default supply temperature is 53°F (12°C), with a range of 38°F to 70°F (3.3°C to 21.1°C). 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 set point concurrent with Com-pressor 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 position if indoor fan is running or fully closed if fan is off.
• If accessory power exhaust is installed, the power exhaust fan mo-tors 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 ac-companied by economizer dampers moving to Minimum Position setpoint for ventilation. If indoor fan is off, 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 30, Appendix B “SEQUENCE OF OPERATION EXAMPLES” on page 31, and Appendix C “MODBUS ADDRESSES” on page 34 for Troubleshooting operation issues.

APPENDIX A — TROUBLESHOOTING

Table A — Operating Issues and Concerns

The Economizer Controller/ Mechanical Cooling is not operating.

| ****

No input power.

| Use a multi-meter to check if there is 24 Vac ± 25% (18 Vac – 30 Vac) at the POWER terminals. If there is no voltage or if the voltage is significantly low, check the transformer output voltage at the RTU. If 24 volts is not present at the transformer secondary side, check the primary line voltage to the transformer. If the line voltage is not present at the transformer primary side, check the primary power to the RTU, fuses, circuit breaker, and so on.

Brownout

| If voltage is below 17 Volts, 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 doesn’t run until there is cooling demand (Y1/Y2 Active). Check the wiring from Y1I and Y2I terminals to the commercial thermostat. 24V should be present between Y1I /Y2I andY1O/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 wring of 24V~ (or G or 24V+) and ensure that they are tied to the same polar of 24 Vac power supply; while checking the wiring of ^ (or G0 or 24V- or COM) and ensure that they are all tied to another polar of 24 Vac power supply.

Free Cooling LED is solid RED.| Sensor, damper or the 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 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 0-10Vdc sensor.

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

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

•     Type II NTC 10K or 0-10Vdc temperature

•     0–10Vdc 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 0-10Vdc.
Sensor LED is blinking RED.| Excess outdoor air| Check the whole Economizer working system such as sensor, damper and thermostat.
Sensor LED is yellow.| Humidity sensor error| Check humidity sensor connection, sensor signal (under range or over range) and sensor signal type.
Sensor LED is OFF.| CO2 sensor error| Check CO2 sensor connection, sensor signal (under range or over range) and sensor signal type.
DAC LED is blinking RED.| Damper slippage| Check if the damper works properly.
DAC LED is blinking RED quickly.| Damper unplugged| Check if the damper is connected or not.
DAC LED is OFF.| Terminal ACT-FB is configured but no available feedback signal.| Check if the feedback signal is connected or not; check if ACT-FB is faulty or not.

The controller has no alarm, but the Free Cooling LED never turns on even though the OA seems to be suitable for Free Cooling.

| Shutoff SP setting error| The shutoff temperature and/or enthalpy setpoint is incorrectly set up. Consult an HVAC professional to set up the shutoff setpoint correctly.
OA temp is too low.| The OAT 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, 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, Free Cooling turns off.

An alarm is displayed on the LCD.| Sensor, damper or the whole working system may not work properly.| Check sensor, damper or the whole working system following the detailed alarm information.
RS485 communication failure.| RS485 signal or configuration error| Check wiring, configuration, Baud Rate (using mobile app) and other network communication parameters.

Firmware update failure.

| Application file is damaged. Operation is incorrect.

USB flash disk doesn’t work properly.

| Reload a BIN file, restart the controller, update firmware following Firmware Update on page 20or change a USB flash disk. Contact your service provider if failure still exists.

WLAN connection failure.

| ****

WLAN stick error or wrong user name and password.

| Plug out and plug in the WLAN stick, enter a correct user name and password, restart the controller or change a WLAN stick. If the WLAN stick is POL903.00/100, the default user name and password are Siemens-WiFi-Stick and SIBP Admin.

Contact Application engineering for information on this accessory.

Table B — Fixed Dry-Bulb No DCV (CO2 Sensor) – 2-Speed Fan

CONVENTIONAL

| ****

Cooling

| ****

Yes

| NA| 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| NA| Off| Off| Off| Off| Min Pos H

Cooling

| ****

No

| NA| 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| NA| Off| Off| Off| Off| Closed

HEAT PUMP

| ****

Cooling

| ****

Yes

| NA| 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

| ****

NA

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

Cooling

| ****

No

| NA| 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

| ****

NA

| 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 setpoint (3MATSET), Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.
• b. Configure 3STG3 DLY under Advanced Settings on page 27 to change to another set time.

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

a

CONVENTIONAL

| ****

Cooling

| No| NA| NA| Off| Off| Off| Off| Closed| Off

Yes

| ****

NA

| >SPb| Off| Off| Off| Off| VENT MIN L to VENT MAX L| On/Offc
£ 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/Offd| Fully open (100%)| On

Yes

| ****

Yes

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

SP| On| On| On| On/Offd| VENT MIN H to 100%| On
£ SP| On| Off| Off| Off| VENT MIN L or 100%| On
£ SP| On| On| On| On/Offd| 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/Offc

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

---

Heating

| No| NA| NA| Off| Off| Off| Off| Closed| Off

Yes

| ****

NA

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

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

---

HEAT PUMP

| ****

Cooling

| ****

Yes

| ****

NA

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

---

Yes

| ****

No

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

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

NOTE(S):

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

) 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

| ****

NA

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

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| NA| 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

| ****

NA

| ****

NA

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

NOTE(S):

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

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. 04-53480416-01 Printed in U.S.A. Form IIK-CRECON-SRT-01 Rev. APg 36 7-23

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