Bard ECON-S2 Wall Mount Ventilation Instruction Manual

Bard ECON-S2 Wall Mount Ventilation

Product Information

• The Partial Flow Economizer with Exhaust for Building Applications is designed for use with 1-1/2 through 3-ton wall-mount air conditioners and heat pumps.
• It is available in two models: ECON-S2 and ECON-S3.
• This product features a factory-installed vent option with Enthalpy Outdoor Control, allowing for efficient cooling and ventilation.
• The product is manufactured by Bard Manufacturing Company, Inc. located in Bryan, Ohio. For more information, visit their website at www.bardhvac.com.

Product Usage Instructions

Installation of Field-Installed Economizer

1. Prepare the unit for economizer installation by following the provided instructions.
2. Install the outdoor air sensor according to the instructions.
3. Proceed with the economizer installation as directed in the manual.
4. Perform an economizer checkout to ensure proper installation and functionality.
5. Refer to the control wiring connection diagrams for correct wiring.

Warning: Before servicing the product, always disconnect electrical power to avoid potential injury or amputation from exposed moving parts.

Economizer Features

• The product includes various features and menus that can be accessed for system setup, advanced setup, setpoints adjustment, checkout, status monitoring, and alarm examples.
• These features are detailed in the accompanying tables and graphs in the user manual.
• Please note that the installation of the economizer should only be done by a trained heating and air conditioning technician. The provided instructions are intended as a guide for professionals and not for inexperienced individuals.

WARNING:

• Exposed moving parts.
• Disconnect electrical power before servicing.
• Failure to do so could result in severe injury or amputation.

Economizer Features

• One-piece construction—easy to install. Direct-drive actuator eliminates linkage.
• Exhaust air damper—built-in with positive closed position. Provides exhaust air capability to prevent pressurization of tight buildings.
• JADE™ controller provides nearly limitless customization on a solid, intuitive electronic platform.
• Actuator Motor – 24 volts, power-open, spring-return, direct-coupled with stall protection. Self-centering shaft clamp and access cover facilitate ease of replacement/maintenance.
• Proportioning-type control for maximum “free” cooling economy and comfort with up to 100% outside air.
• Enthalpy sensor to monitor outdoor air conditions.
• Minimum Ventilation Position available for required ventilation of occupants or dilution of pollutants.
• Mixed air sensor to monitor outdoor and return air to automatically modulate damper position.

Economizer with Exhaust Model Nomenclature

General Information

• The economizer should only be installed by a trainedheating and air conditioning technician.
• These instructions serve as a guide to the technician installing an economizer package, not as a step-by-step procedure with which the mechanically inclined owner can install the package.
• The economizer housing is shipped in one carton, which contains the electrical harness, miscellaneous hardware and installation instructions.
• The economizer installation requires the use of a 2-stage cooling thermostat (if there is not one already present) and requisite amounts of low-voltage conductor wire for two-stage cooling.
• The number of low-voltage control conductors will vary depending upon the application.
• If using a master controller, the MC4002 controller is designed specifically to control two (2) redundant wall mount units equipped with economizers.
• Any wall mount unit equipped with an economizer must also have a factory/field installed low ambient control.
• Please refer to the appropriate model/year Specification Sheet for the requisite field installed low ambient control kit part numbers.

Field-Supplied Tools Needed

• Appropriate personal protection equipment, including gloves and safety glasses
• 5/16′ nut driver
• Phillips head screwdriver
• Small flat-head screwdriver for securing wire in terminal blocks
• Electrical tools
• Multimeter

Unpacking
Upon receipt of the equipment, be sure to compare the model number found on the shipping label with the accessory identification information on the orders and shipping document to verify that the correct accessory has been shipped. Inspect the carton housing of each economizer assembly as it is received and, before signing the freight bill, verify that all items have been received and there is no visible damage. Note any shortages or damage on all copies of the freight bill. The receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. Concealed damage not discovered until after loading must be reported to the carrier within 15 days of its receipt.

Description

ECON-S economizers are designed to be used with the wall mount series air conditioners and heat pumps, shown in Table 1, equipped with low ambient controls. They are electromechanical economizer systems designed to provide “free” cooling where the outdoor air temperature/enthalpy is cool enough to provide the needed cooling without running the compressor, or in addition to the compressor. When cooling is required, the system automatically takes advantage of cold outdoor air when available and uses it for first-stage cooling. This then reduces the need to run the air conditioning compressor providing lower operating costs and increasing the service life of the equipment. If the outdoor air temperature/enthalpy is too warm to be sufficient for cooling, the dry bulb outdoor air temperature sensor detects the condition and automatically closes the outdoor air intake/exhaust damper, opens the return air damper, and switches to compressor-only operation. Without attention from the end user, the economizer assembly is meant to automatically achieve maximum savings while ensuring appropriately cool space temperatures. The economizer utilizes a fully modulating damper actuator, which will control intake/ exhaust in order to obtain and maintain a factory- set minimum supply air temperature. As a secondary feature, the economizer assembly can be programmed for minimum ventilation based on an “occupied” (or otherwise dedicated) 24V signal to satisfy fresh air ventilation on populated structures or dilution of internal pollutants.
ECON-S Series economizers are not for use with variable capacity ECU models.

TABLE 1: Economizer Application

Low ambient control is required with w/economizer for low-temperature operation.

INSTALLATION

INSTALLATION OF FIELD-INSTALLED ECONOMIZER

WARNING

• Electrical shock hazard.
• Have a properly trained individual perform these tasks.
• Failure to do so could result in electric shock or death.

CAUTION

• Cut hazard.
• Wear gloves to avoid contact with sharp edges.
• Failure to do so could result in personal injury.

Preparing Unit for Economizer Installation

1. Disconnect power to the unit.
2. Unpack the economizer assembly, which includes the integral economizer with an attached electrical harness, mixed air sensor, body panels, miscellaneous hardware, and installation instructions.
3. From the existing wall mount unit, remove and save (or discard) as directed (see Figure 1):
   • Blower access panel and screws (save)
   • Ventilation access panel (discard)
   • Filter access panel (save)
   • Filter (save)
   • Outer and inner control panel doors and screws (save)
4. Remove and discard the exhaust cover plate (save screws).
5. Install a new condenser exhaust plate with a screen over opening into the condenser section (see Figure 2).
6. Verify what type of filter racks are in the unit. The unit may include either a filter partition and tray assembly or two separate filter brackets. If the unit contains a partition and tray assembly, this may be left as-is for the ventilator installation. If the unit contains two separate filter brackets, remove the filter brackets (see Figure 3). The circuit breaker offset plate must be loosened and moved slightly to gain access to several of the screws holding the filter brackets in place. Tighten the screws holding the control panel after the filter brackets have been removed. Install filter bracket fill plate as shown in Figure 4 on page 6. Install the provided filter brackets on the economizer.

Outdoor Air Sensor Installation

1. Remove and save both side grilles and screws.
2. Install the outdoor enthalpy sensor in the lower condenser section on the side opposite the control panel with two (2) screws provided as shown in Figure 6.
3. Route the wire harness across the back of the unit and secure it with two wire ties (provided). Push the harness up through the grommet at the bottom of the control panel (see Figure 7). Secure with wire ties (provided) to the other wires in the grommet. Ensure the wire harness cannot contact moving parts or copper tubing. Replace side grilles.

Economizer Installation

1. Remove (and discard) left and right filter brackets from the economizer assembly if the existing wall mount unit brackets are in place. For units with filter partition assembly, install the return fill plate as shown in Figure 5 on page 7.
2. Insert the economizer into the opening in the wall unit, being careful not to tear unit insulation. To clear the blowers, position the economizer at a 45° angle under the blowers. Fully seat economizer assembly to the rear of the wall unit cavity. Slide the economizer towards the control panel and line up with the return air opening in the back of the wall unit.
3. Insert the 12-pin plug into the front of the control panel. See Figures 7 and 8.
4. Route the two orange wires along refrigerant lines behind the filter bracket (if applicable) to terminate at the blower partition (see Figure 8).
5. Install the mixed air temperature sensor and bracket in the blower partition (see Figure 8 Top View) using the two existing holes. (Holes are on opposite sides on left-hand units). If necessary, remove the shield to aid in mounting the sensor (replace it after mounting the sensor). Insert a white, two-pin sensor plug into the sensor housing. Coil excess orange wires and wire tie to the suction/discharge line.
6. Run black and red wire from economizer’s upper 12-pin wiring harness through a grommet and another bushing into the control panel and connect to the black and red wire sensor wires (see Figure 7). Wrap and wire tie the excess wire.
7. Remove the Y1-Y2 jumper from the low-voltage terminal strip (this jumper is already removed in units with factory-installed economizers). If a Balanced Climate is desired, the secondary jumper must be removed from the vent harness by disconnecting the purple and yellow/white jumper in the vent harness.

Economizer Checkout

1. Complete economizer checkout using the economizer control touchpad (see CHECKOUT on page 17).
2. After confirming the economizer operation, install the mist eliminator (as shown in Figure 9 with the airflow arrow pointing towards the unit) and blower, filter, and vent access panels.

Control Wiring Connection Diagrams
The control wiring diagrams in Figures 10 – 13 represent typical control wiring for single units controlled by individual thermostats. If thermostats other than those referenced are used, the installer must verify output functions accordingly. For dual unit installation utilizing lead/lag controller systems, complete details are contained in MC4002 Series Lead/Lag Controller installation manual 2100- 614. For operation with MV5000 lead/lag controller, see MV5000 installation manual 2100-636.

1. Factory-installed jumper. Remove the jumper and connect to the N.C. fire alarm circuit if an emergency shutdown is required.

2. The wire is not needed below 15KW.

3. The wire is required for dehumidification models only.

4. Do not connect “A” from the thermostat if an optional CO2 controller is used 0-10 VDC modulating CO2 control signal for modulating ventilation control (optional for ECON only)

5. Change model configuration from heat pump to heat/cool. Must be configured to programmable and fan set to be programmed fan for the “A” output to function during scheduled occupied periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For dehumidification, must be configured for “No Economizer” for YO/D to be active for humidity control…

6. Install jumper for 1-stage electric heat on units with less than 15KW

7. Do not add these wires if set up for modulating control. See note 6.

8. If the economizer is field installed, a jumper must be removed. If the economizer is factory-installed,

9. the jumper will be omitted when shipped. For units with economizers, the balanced climate

10. jumper is in the economizer section. Refer to the economizer manual for the balanced climate option.

11. Factory-installed jumper. Remove the jumper and connect • to the N.C. fire alarm circuit if emergency shutdown is required.

12. The wire is not needed below 15KW.

13. The wire is required for dehumidification models only.

14. Do not connect “A” from the thermostat if an optional CO2 controller is used 0-10 VDC modulating CO2 control signal for modulating ventilation *control (optional for ECON only – see vent instruction manuals

15. Ensure the model configuration is a heat pump and not heat/cool. Must be configured to programmable and fan set to be programmed fan for the “A” output to function during scheduled occupied periods. Must be configured for multi-stage for Y1 output to be

16. active 1st stage cooling. For dehumidification, must be configured for “No Economizer” for YO/D to be active for humidity control.

17. Do not add these wires if set up for modulating control.

18. F 2-sage there sa recommended torta ticed mated e. 1 2 bumpers not present if the economizer is factory installed. Units with economizers have balanced removed in the unit and on ade for to t modes manual. The jumper is factory Completestat not compatible with C**HY models.

• FaN in Salem during emergency shutdown required.
• 2A Wire is not needed below 15KW.
• 2B han KWer for 1 stage electric heat on units with more
• The wire is required for dehumidification models only.
• Fervent un whine over regional CO2 control is not used.
• Do not add these wires if set up for modulating control. See note 6.
• 0-10 VDC Modulating CO2 control signal for modulating ventilation control (Optional for ECON Only)
• An F6 2 Heat Con sensational, or 40 Us, No range requiteat 1 Cool heat Pump) /8) Jumper needs added. /9
• Factory-installed jumper. Remove the jumper to activate Balanced Climate™ Mode.
• A 2-stage thermostat is recommended for Balanced Climate mode.

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown in Figures 12 and 13). The red/white wire on the blower interlock relay (located on the vent control plate) needs to be moved from the “common” terminal to the “normally closed” terminal. If this change is not made, the relay will latch on once the “A” signal is received and the blower will not turn off. Refer to page 28 to see the vent wiring diagram with this change called out.

FIGURE 13: Non-Programmable Thermostat Connections for Heat Pump with Economizer

1. A FONG FIRE SLARM CIRCUIT EMERGENCY SHUNDREDURED.
2. WIRE NOT NEEDED BELOW 15KW.
3. WIRE REQUIRED FOR DEHUMIDIFICATION MODELS ONLY.
4. FOR VENT OPERATION, ADD JUMPER IF OPTIONAL CO2 CONTROLLER IS NOT USED. VENT WILL RUN WHILE BLOWER IS ENERGIZED.
5. FOR ECON & CRV-V, AN ADDITIONAL WIRE CHANGE IS REQUIRED. SEE THE INSTALL MANUAL DO NOT ADD THESE WIRES IF SETTING UP FOR MODULATING CONTROL. SEE NOTE 6.
6. 0-10 VDC MODULATING CO2 CONTROL SIGNAL FOR MODULATING VENTILATION CONTROL
7. (OPTIONAL FOR ECON ONLY) – SEE THE VENT INSTALLATION MANUAL. JUMPER NEEDS ADDED.
8. FACTORY INSTALLED JUMPER. JUMPER IS NOT INSTALLED ON THE UNIT WITH ECONOMIZERS.
9. JUMPER IS LOCATED IN JADE WIRING HARNESS. HUMIDISTAT 8403-100 WILL NEED TO BE CONFIGURED FOR DEHUMIDIFICATION IN THE MENU. SEE THE USER’S MANUAL

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown in Figures 12 and 13). The red/white wire on the blower interlock relay (located on the vent control plate) needs to be moved from the

• signal te receive to and the bally i do termi ot. test age is no sea te, ter lay will atrium wince this change called out.

START-UP/CHECKOUT PROCEDURES

JADE™ Economizer Controller

W7220 controller offers unparalleled flexibility and expansion in a dependable and solid electronic platform.

• Multiple economizer applications from one controller.
• Nearly limitless customization of setpoints.
• Internal checkout menu provides fast performance assessment.
• Alarms menu provides assistance in troubleshooting.

Memory: User-defined setpoints remain in non- volatile flash memory regardless of electrical outage duration. Control voltage below 18V may cause erratic pertormance…

From the factory, the JADE™ economizer controller has been preset with “default” values that were pre-  determined as optimum for equipment buildings,and these are shown in Tables 2 – 4. However, it is important to review and/or customize these operational values per owner specifications in order to guarantee satisfactory performance.

The installing contractor can easily access the JADE™ programming by the integral keypad and LCD display. There are six (6) basic MENU categories to navigate:

1. STATUS – provides real-time access to sensor input, damper and equipment operation.
2. SETPOINTS – customizable operational parameters.
3. SYSTEM SETUP – customizable application programming (see Revew/Customize System Setup).
4. ADVANCED SETUP – further application and operational options.
5. CHECKOUT – instantly activate and verify economizer functions.
6. ALARMS – displays alarms and pinpoints problem

Review/Customize System Setup
Before being placed in service, the JADE™ economizer controller programming should be reviewed/customized through the following steps:

SYSTEM SETUP: from the main screen, press the
SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the SYSTEM SETUP menu.

• Push the SELECT (ENTER) BUTTON to choose the SYSTEM SETUP menu.
• Navigate through the multiple levels of SYSTEM
• SETUP by pushing the SCROLL (UP/DOWN) BUTTONS.
• To change a specific parameter in the SYSTEM
• SETUP menu, press the SELECT (ENTER)
• BUTTON to display its current value. Press the
• SCROLL (UP/DOWN) BUTTONS to change or increase/decrease value. Press the SELECT (ENTER) BUTTON to save the new customized value “CHANGE STORED” will be displayed.
• Press the SELECT (ENTER) BUTTON again to return to current menu parameter.
• For specific SYSTEM SETUP level information, refer to Table 2 on page 16.
  • NOTE: During an extended level of inactivity, the display of the JADE™ economizer controller will begin to automatically scroll through the various levels of the STATUS menu as a screensaver. Each level will stay for approximately 5 seconds before changing to the next level.

ABLE 2: System Setup Menu Levels

CONV = A/C

AUX IN| HP(B)| HP(O) HP(B| Energize on Cool  *

Energize on Heat

FAN SPEED| 1 Speed| 1  Speed

2  Speed

|
FAN CFM| 5000| 100 to

15000

| Not applicable

AUX OUT

| ****

EXH2

| NONE ERV EXH2 SYS| ****

The product can be used to signal other devices

OCC

| ****

INPUT

| INPUT or ALWAYS| INPUT is for dedicated OCC signal, ALWAYS is for all other situations
FACTORY DEFAULT| NO| YES or NO| Resets to factory defaults if changed to YES

In SYS SETUP, the correct Equipment setting is HP and for the AUX2 IN is HP (B) in all applications. This is correct for both air conditioners and heat pump equipment in order to have the correct operating sequences for the economizers. DO NOT change to CONV = A/C setting just because the equipment is an air conditioner and not a heat pump.
ADVANCED SETUP: from the main screen, press the SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the ADVANCED SETUP menu.

• Push the SELECT (ENTER) BUTTON to choose the ADVANCED SETUP menu.
• Navigate through the multiple levels of ADVANCED SETUP by pushing the SCROLL (UP/DOWN) BUTTONS.
• To change a specific parameter in the ADVANCED SETUP menu, press the SELECT (ENTER) BUTTON to display its current value. Press the
• SCROLL (UP/DOWN) BUTTONS to change or increase/decrease value. Press the SELECT (ENTER) BUTTON to save the new customized value “CHANGE STORED” will be displayed.
• Press the SELECT (ENTER) BUTTON again to return to the current menu parameter.
• For specific ADVANCED SETUP level information, refer to Table 3.

TABLE 3: Advanced Setup Menu Levels

45°F

| ****

35-55°

| Temp to activate freeze protection — Close Damper
FREEZE POS| CLO| CLO or MIN| Damper position upon freeze protection

STG3 DLY

| ****

15 MIN

| ****

0 to 4.0h or OFF

| Delay for 3rd Stage Cooling – allows for 3 stages of cooling, one stage for econ & two stages for compressor
DMPR POS| CLO| CLO or OPN| Where the damper goes upon shutdown signal

MA T CAL

| ****

0.0°F

| +/-2.5°F

from actual reading

| ****

Mixed Air Sensor temperature calibration

OA T CAL

| ****

0.0°F

| +/-2.5°F

from actual reading

| ****

Outdoor Air Sensor temperature calibration

OAS H CAL

| ****

0%

| +/-10%

from actual reading

| Outdoor Air Humidity Sensor calibration for economizers using temp/humidity sensor

SETPOINTS: from the main screen, press the SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the SETPOINTS menu.

• Push the SELECT (ENTER) BUTTON to choose the SETPOINTS menu.
• Navigate through the multiple levels of SETPOINTS by pushing the SCROLL (UP/DOWN) BUTTONS.
• To change a specific parameter in the SETPOINTS menu, press the SELECT (ENTER) BUTTON to display its current value. Press the SCROLL (UP/
• DOWN) BUTTONS to change or increase/decrease value. Press the SELECT (ENTER) BUTTON to save the new customized value “CHANGE
• STORED” will be displayed. Press the SELECT (ENTER) BUTTON again to return to the current menu parameter.
• For specific SETPOINTS level information, refer to Table 4.
  • NOTE: At this point, the economizer assembly should be fully functional and ready for preliminary testing.

TABLE 4: Setpoints Menu Levels

MAT SET

| ****

53°F

| ****

38°F to 65°F

| Mixed Air Temperature setpoint at which the economizer damper will begin to modulate

to maintain setting

LOW T LOCK| ****

0°F

| -45°F to 80°F| Low outdoor ambient temperature for compressor

lockout

DRYBLB SET| ****

60°F

| 48°F to 80°F| Maximum outdoor temperature setting for “free”

economizer cooling

ENTH CURVE

| ****

ES3

| ES1, ES2, ES3,

ES4 or ES5

| Enthalpy boundary “curves” for economizers using temp/ humidity sensor, see “Enthalpy Settings” explanation
MIN POS| ****

2V

| 2 to 10 VDC| Actuator voltage for Minimum

Position – see Minimum Position Note

EXH1| 50%| 0 to

100%

| Setpoint for damper if exhaust

fan is powered by economizer

EXH2| 6%| 0 to

100%

| Setpoint for AUX output signal

DCV SET (See NOTE

under Table 7 on page

| ****

1100

| ****

500 to

2000

| Displays only if a CO2 sensor is connected. Setpoint for Demand Control Ventilation of space. Above the setpoint,

the OA dampers will modulate open to bring in additional OA to maintain a space ppm level below the setpoint.

MINIMUM POSITION NOTE: The minimum position setting has been preset to 1OV which when connected to the MC4002 Lead/Lag Controller System will allow the economizer to drive wide open per emergency ventilation strategy as detailed in MC4002 Instructions. This may require resetting to a lower value per job specifications.
CHECKOUT: from the main screen, press the SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the CHECKOUT menu.

• Push the SELECT (ENTER) BUTTON to choose the CHECKOUT menu.
• Navigate through the multiple levels of CHECKOUT  by pushing the SCROLL (UP/DOWN) BUTTONS.
• To perform a specific test in the CHECKOUT menu, press the SELECT (ENTER) BUTTON to choose a particular exercise, “RUN?” will appear. Press the
• SELECT (ENTER) BUTTON again to activate this exercise. After a short pause, “IN PROGRESS” will appear as the test activates. “DONE” will display after the test is complete. Press the MENU UP
• (EXIT) BUTTON to end the test and/or turn off the activated relay. For specific CHECKOUT level information, refer to Table 5.

NOTE: CHECKOUT functions bypass the normal 5-minute delay for compressor protection. Be sure to allow for enough time to pass between tests so the compressor is not damaged from extreme short-cycling.
TABLE 5: **** Checkout Menu Levels

actuator

DAMPER VMAX-HS

| Opens damper to the MIN POS level indicated in the SETPOINTS menu. See Minimum Position Note above.
DAMPER OPEN| Forces damper to full open position, energizes exhaust contacts
DAMPER CLOSE| Positions damper to completely closed position
CONNECT Y1-O| Forces Y1-OUTPUT to the compressor
CONNECT Y2-O| Forces Y2-OUTPUT to the compressor
CONNECT EXH1| Setpoint for damper if the exhaust fan is powered by the economizer
CONNECT EXH2| Setpoint for AUX output signal

CONNECT AUX

| Depending upon the AUX OUT setting from

SYSTEM SETUP menu:

NONE – no action

ERV – 24VAC out for ERV & NOT Economizer

SYS – 24VAC out for alarm

NOTE: Economizer assembly should be ready to put into service. At any point during operation, in economizer mode or idle, real-time information from sensors and integral components can be accessed from the STATUS menu.
STATUS: from the main screen, press the SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the STATUS menu.

• Push the SELECT (ENTER) BUTTON to choose the STATUS menu.
• Navigate through the multiple levels of STATUS by pushing the SCROLL (UP/DOWN) BUTTONS.
• Astration in Martine, there is mat/output change or otherwise, alter the displayed criteria.
• It is simply a window into the operation of the economizer controller.
• For specific STATUS level information, refer to Table 6 on page 18.
  • NOTE: Upon power-up (or after power failure or low voltage condition), the controller will begin a 5-minute time delay before enabling mechanical cooling.

TABLE 6: Status Menu Levels

OCCUPIED

|

YES/NO

| Indicates if dedicated 24V occupied signal is being received on terminal OCC
HEAT PUMP| COOL/HEAT| Displays actual compressor use if in HEAT PUMP mode
COOL Y1-IN| ON/OFF| Indicates if 24V signal is being received on terminal Y1-I

COOL Y1-OUT

|

ON/OFF

| Displays if controller is actively calling for mechanical compressor cooling (24V on Y1-O)
COOL Y2-IN| ON/OFF| Indicates if 24V signal is being received on terminal Y2-I

COOL Y2-OUT

|

ON/OFF

| Displays if controller is actively calling for Stg. 2 cooling

(24V on Y2-O)

MA TEMP| 0° to 140°F| Current mixed air temp
 OA TEMP| -40° to 140°F| Current outdoor air temp

OA HUM

|

0% to 100%

| Current outdoor air humidity for economizers using temp/ humidity sensor
DAMPER OUT| 2.0 to 10.0| Displays voltage to actuator
ACT POS| 0 to 100%| Current % of the opening
ACT COUNT| N/A| The current count of actuator cycles from installation
ACTUATOR OK| YES/NO| Indicates potential fault
EXH1 OUT| ON/OFF| Output of EXH1 Terminal
MECH COOL ON| 0, 1, or 2| Stages of mechanical cooling currently active

NOTE: If there are any potential problems recognized by the economizer controller, it may be registered in the form of an alarm in the ALARM(S) menu. If there is a period of inactivity AND there is an alarm registering, the controller will randomly scroll through the ALARM(S) menu items as a screensaver.

ALARM(S): from the main screen, press the SCROLL (UP/DOWN) BUTTONS to navigate through the six (6) basic menu items to the ALARM(S) menu.

• Push the SELECT (ENTER) BUTTON to choose the ALARM(S) menu.
• Navigate through the current alarms in ALARM(S) by pushing the SCROLL (UP/DOWN) BUTTONS.
• Once the alarm has been identified, and the cause navigating the desire set mand pressing he
• SELECT (ENTER) BUTTON to choose that specific alarm. “ERASE?” will display. Press the SELECT
• (ENTER) BUTTON again. “ALARM ERASED” will appear. Press the MENU UP (EXIT) BUTTON to complete the action and return to the previous menu.
• For specific ALARM(S) information, refer to Table 7.

TABLE 7: Alarm Examples

any registered alarm
NOTE: This is not a complete list of alarms. Additional alarms will display depending upon the parameter settings and configuration and attached equipment.

NOTE: When using the Bard 8403-096 CO2 controller, configure the sensor to 2-10VDC output (see CO2 sensor instructions). See also Figure 18 on page 25.

• The JADE controller default setting is 1100 PPM. The economizer will modulate to maintain this CO2 level in the room. The default setting can be changed in the SETPOINT menu in the DCV SET option.
• Default settings and DCV MIN and DCV MAX will appear only when the CO2 sensor is connected.
• In the SETPOINT menu, change the MAX VENT setting to 9.5 volts.
• The CO2 controller is active at any time the A terminal is energized.
• The status of the CO2 input can be viewed at any time in the STATUS menu.

Enthalpy Settings
If the economizer is enthalpy-based and was shipped with the temp/humidity sensor, the economizer must be programmed for the specific enthalpy curve boundary desired for “free” outdoor cooling. The available enthalpy boundaries are all subject to specific OA temperature, OA humidity, and OA dew points. If all of the OA conditions are below the specific points outlined in each boundary, the conditions are good to economize and the economizer mode is set to “YES”. If some or all the OA conditions are above the specific points outlined in each boundary, the conditions are not good to economize and the economizer mode is set to “NO”. ES3 is factory default.

Economizer Sequence of Operation Condition – Cool/Dry OA Conditions

• 1* Stage Cooling closes and sends a signal to JADE™ control. Since the air temperature outside is cooler than the preset DRYBULB SET setting, or is below the ENTH CURVE boundary in the SETPOINTS menu, the actuator will power the economizer damper to “economizer” mode as the indoor blower motor starts. The mixed air sensor senses a mixture of return air and cool outdoor air and modulates the opening to achieve preset MAT SET setting in SETPOINTS menu. Compressor operation is inhibited (see Figure 15).
• 2″ Stage Cooling closes and sends a signal to JADE™ control, which closes the Y1-0 relay to begin mechanical cooling. The economizer damper REMAINS OPEN in tandem operation with the compressor as long as the OA conditions do not drop below the preset DRYBULB SET/ENTH CURVE settings in the SETPOINTS menu (see Figure 16).
• 3″ Stage Cooling (if available) closes and sends a signal to JADE™ control, which closes the Y2-0 relay to begin 2* stage mechanical cooling. The economizer damper REMAINS OPEN in tandem operation with the compressor as long as the temperature outside does not drop below the preset DRYBULB SET setting in the SETPOINTS menu (see Figure 16).

Condition – Warm/Humid OA Conditions

• 1* Stage Cooling closes and sends a signal to  JADE™ control. Since the 0A conditions are abovethe preset DRYBULB SET/ENTH CURVE setting in the SETPOINTS menu, the control will simply close the Y1-0 relay to initiate mechanical cooling. The economizer damper will remain closed or in a minimum ventilation setting depending upon occupied status (see Figure 17).
• 2° Stage Cooling (if available) closes and sends a signal to JADE™ control. Since the 0A conditions are still above than the preset DRYBULB SET/ ENTH CURVE setting in the SETPQINTS menu, the control will simply close the Y2-0 relay to initiate 2″ stage mechanical cooling. The economizer damper will remain closed or in a minimum ventilation setting depending upon occupied status (see Figure 17).

Economizer Operation for Single Stage:

Balanced Climate Mode – S, Y, and Z Option Economizer Sequence of Operation
Balanced Climate can be used for duct-free and ducted applications below 0.2″ W.C. ESP total static.
Call for cooling and ECONOMIZER IS NOT AVAILABLE (due to outdoor conditions):
Y1 energizes mechanical cooling and the Balanced Climate fan speed simultaneously. If the outdoor conditions are not acceptable, the Y2 terminal will energize the fan speed to the rated airflow. When the temperature drops below the Y2 setpoint, the unit will return to the Balanced Climate fan speed. When the cooling call is satisfied, the compressor will shut down the economizer will move to a minimum position (ventilation setting) and the fan will continue to run at RATED airflow if A is energized on the low voltage terminal strip.
Call for cooling and ECONOMIZER IS AVAILABLE (due to outdoor conditions):
Two stage cooling thermostat is required and the connector is disconnected at JADE™ controller to enable Balanced Climate mode (see wiring diagram 4056- 250* on page 28).
The unit has a call for ventilation: Damper to Min position and fan will run at RATED airflow. (When using Balanced Climate mode, increase the minimum position blade setting to allow 28% more outdoor air CFM than rated.) Y1 energizes the economizer and the Balance Climate fan speed simultaneously. If the temperature continues to rise, the Y2 terminal will increase the fan speed to the RATED airflow. When the temperature drops below the Y2 setpoint, the unit will return to the Balanced Climate fan speed. When the cooling call is satisfied, the compressor will shut down the economizer will move to a minimum position (ventilation setting) and the fan will increase to run at RATED airflow if A is energized on the low voltage terminal strip.

TABLE 8: Unit Operation with S (Part Flow), Y and Z (Full Flow) Economizer Options

Unit Operation

| ****

Occ. Signal

| Low Voltage 24VAC| Speed Taps| ****

Fan Speed

| ****

Comp. Oper.

| ****

Damper

---|---|---|---|---|---|---
G| Y1| Y2| W1| W2| A| D| 1| 2| 3-4-5 1
Fan Only| Yes| X|  |  |  |  | X|  | X|  |  | Vent| Off| Min Pos
Fan Only| No| X|  |  |  |  |  |  | X|  |  | Vent| Off| Closed
BC Cooling| Yes|  | X|  |  |  | X|  | X| X|  | B Climate| Econ| Min Pos
BC Cooling| No|  | X|  |  |  |  |  | X| X|  | B Climate| Econ| Closed
Full Load Cool| Yes|  | X| X|  |  | X|  | X| X| X| Lo/Med/Hi| On| Min Pos
Full Load Cool| No|  | X| X|  |  |  |  | X| X| X| Lo/Med/Hi| On| Closed
1st Stage Heat| Yes|  |  |  | X|  | X|  |  |  | X| Lo/Med/Hi| Off| Min Pos
1st Stage Heat| No|  |  |  | X|  |  |  |  |  | X| Lo/Med/Hi| Off| Closed
2nd Stage Heat| Yes|  |  |  | X| X| X|  |  |  | X| Lo/Med/Hi| Off| Min Pos
2nd Stage Heat| No|  |  |  | X| X|  |  |  |  | X| Lo/Med/Hi| Off| Closed
Dehumidify2| Yes|  |  |  |  |  | X| X| X| X|  | B Climate| On| Min Pos
Dehumidify2| No|  |  |  |  |  |  | X| X| X|  | B Climate| On| Closed

BC and B Climate – Balanced Climate

1. Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used.
2. Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed during dehumidification operation.

Economizer Operation – Balanced Climate Mode
Connector disconnected from JADE™ controller (see wiring diagram on page 28)

DSP (DISPLAY

CONFIGURATION)

|

C

|

CT

UNI (UNITS SELECTION)| US| US
COL (CO2 LOW OUTPUT RANGE)| 700| 0
COH (CO2 HIGH OUTPUT RANGE)| 1500| 2000
TOL (TEMP. LOW OUTPUT RANGE)| Not Used
TOH (TEMP. HIGH OUTPUT RANGE)| Not Used
BAR (BAROMETRIC PRESSURE)| See Instructions with Controller For High Altitude Installations
CAL (CALIBRATION)| Used for Field Calibration

FIGURE 19: Wiring Diagram – Enthalpy Sensor

NOTE: The Y1-Y2 jumper must be removed from the unit low voltage terminal strip in order for the vent to function. This jumper is already removed in units with factory-installed economizers.

Partial Flow Economizer with Exhaust for Building Applications

Models: ECON-S2 & ECON-S3 Factory-Installed Vent Option with Enthalpy Outdoor Control For Use with 1-1/2 Through 3 Ton Wall Mount Air Conditioners and Heat Pumps
NOTE: These instructions are written to cover field-installed economizers, but are also included with factory-installed economizers. For factory-installed economizers, all portions addressing “installation” are for reference only.

• Bard Manufacturing Company, Inc.
• Bryan, Ohio 43506
• www.bardhvac.com.
• Manual: 2100-700F
• Supersedes: 2100-700E
• Date: 6-8-23

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