BMC ECON-DB2-A Full Flow Low Leakage Economizers Instruction Manual

BMC ECON-DB2-A Full Flow Low Leakage Economizers

Product Information

The Full Flow Low Leakage Economizers with Exhaust are designed for building applications and are available with either Enthalpy or Dry Bulb Outdoor Control. The models available are ECON-DB-2, ECON-DB-3, ECON-WD-2, and ECON- WD-3. These economizers can be used for Enthalpy or Dry Bulb installations and are compatible with 1-1/2 through 3 Ton Wall Mount Air Conditioners and Heat Pumps.

The installation instructions provided in the manual cover both field- installed economizers and factory-installed economizers. For factory-installed economizers, the installation instructions are for reference only.

BMC, Inc. located in Bryan, Ohio 43506 is the manufacturer of these economizers. The manual number is 2100-796 and supersedes any previous versions. The date of the manual is 7-13-23.

Product Usage Instructions

Installation of Field-Installed Economizer

1. Prepare the unit for economizer installation according to the instructions provided (refer to page 4 of the manual).
2. Install the outdoor air sensor (refer to page 7 of the manual).
3. Follow the instructions provided for economizer installation (refer to page 7 of the manual).
4. Perform an economizer checkout to ensure proper installation (refer to page 9 of the manual).

Control Wiring Connection Diagrams

Refer to page 9 of the manual for control wiring connection diagrams.

Economizer Features

Refer to the tables provided in the manual for information on economizer application, system setup menu levels, advanced setup menu levels, setpoints menu levels, checkout menu levels, status  menu levels, alarm examples, and unit operation with S (Part Flow), Y and Z (Full Flow) Economizer Options.

Economizer with Exhaust Model Nomenclature

Refer to the Graphs provided in the manual for information on W/J18, W/J24, W/J30, and W/J36 Ventilation Delivery with the economizer.

Note: The installation of the economizer should be carried out by a trained heating and air conditioning technician. These instructions are intended to guide the technician and not for installation by a non- professional.

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.

Economizer Features

• One piece construction—easy to install.
• 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 volt, 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 trained heating 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 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 appropriate model/year Specification Sheet for 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-DB and ECON-WD 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 a 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-DB and ECON-WD Series economizers are not for use with variable capacity ECU models.

TABLE 1
Economizer Application

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

Installation

WARNING
Electrical shock hazard.
Disconnect remote electrical power supply or supplies before servicing.
Failure to do so could result in electric shock or death.

WARNING
Exposed moving parts.
Disconnect all electrical power before servicing.
Failure to do so can result in severe injury or amputation.

CAUTION
Sharp metallic edges.
Take care and wear appropriate protective devices to avoid accidental contact with sharp edges.
Failure to do so can result in personal injury.

Preparing Unit for Economizer Installation

1. Disconnect power to unit.

2. Unpack the economizer assembly, which
   includes the integral economizer with attached electrical harness, mixed air sensor, body panels, miscellaneous hardware and installation instructions.

3. From 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 (discard)
   • Filter (save)
   • Outer and inner control panel doors and screws (save)

4. Remove and discard the exhaust cover plate (save screws).

5. Install new condenser exhaust plate with screen over opening into condenser section (see Figure 2).

6. The unit includes a filter partition and tray assembly installed below the blower. The ventilator can be installed without moving this assembly, but it may be beneficial to loosen the front two (2) mounting screws of the filter partition assembly. The assembly can then be lifted up slightly to allow more room for installation of the unit ventilator.

7. Install the return fill plate using three (3) screws as shown in Figure 3 on page 6.

FIGURE 1
Wall-Mount Unit Access Panels

FIGURE 3
Economizer and Return Fill Installation
NOTE: The return fill plate will need to be installed before the economizer assembly (see below).

Outdoor Air Sensor Installation

1. Remove and save both side grilles and screws.

2. Install the outdoor air sensor (temperature only or enthalpy) in the lower condenser section on the side opposite the control panel with two (2) screws provided. Tube end of sensor should mount flush with base (see Figure 4).
   NOTE: The temperature-only sensor is shipped with a bracket attached. The bracket is not needed for 2 and 3 ton Series 1 units and must be removed before installation.

3. Route the wire harness across the back of the unit and secure with two wire ties (provided). Push harness up through the grommet in the bottom of the control panel. 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. Connect 12-pin male plug into female plug in side of the control panel as shown in Figure 5. See wiring diagrams found on pages 10 – 13.

2. Insert economizer into opening in wall unit between the filter tray and condenser section, being careful not to tear unit insulation. Fully seat economizer assembly to the rear of the wall unit cavity. Slide economizer to right and line up with return air opening in back of wall unit.

3. Re-install and tighten front filter tray mounting screws (if loosened in Step 6 on page 4).

4. Route the two orange wires along refrigerant lines behind the filter bracket (if applicable) to terminate at the blower partition (see Figure 6).

5. Install the mixed air temperature sensor and bracket in blower partition (see Figure 6) using the two existing holes. If necessary, remove the shield to aid in mounting the sensor (replace after mounting sensor). Insert white, two-pin sensor plug into sensor housing. Coil excess orange wires and wire tie to suction/discharge line.

6. Run black and red wire from economizer upper 12- pin wiring harness through grommet and other bushing into the control panel and connect to the black and red wire sensor wires (see Figure 6). 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 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.

8. Remove hood front (grille), mist filter and control door.

9. Lift economizer hood to unit and hold in position. Line up four (4) holes in outer economizer hood door (two on each side) with corresponding holes in unit and mount economizer hood to unit with four (4) screws.

10. Connect vent option front to vent hood door (see Figure 7) using ten (10) screws (supplied).

11. Connect economizer’s upper and lower 12-pin wiring connectors to 12-pin wiring connectors inside economizer control panel.

12. Re-insert filter into filter brackets. Arrow on filter should point up.

13. Attach blower access panel.

Economizer Checkout

Since observation of motor/damper operation is difficult after air hood installation, it is recommended the unit be enabled for start-up now. If no power is available, or if immediate start-up is not desired, continue with the basic installation process by skipping to Step 4. The air hood assembly can be partially disassembled at a later time for start-up/checkout procedures.

1. Attach wall unit outer and indoor control panel doors.
2. Turn power to unit on.
3. Complete economizer checkout using economizer control touchpad (see CHECKOUT on page 16).
4. After completing economizer operation, attach the economizer hood mist eliminator (with an air˜ow arrow pointed towards unit), control door and front door.

Control Wiring Connection Diagrams

The control wiring diagrams on pages 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.

FIGURE 8
Programmable Thermostat Connections for Air Conditioner with Economizer

FIGURE 9
Programmable Thermostat Connections for Heat Pump with Economizer

FIGURE 10
Non-Programmable Thermostat Connections for Air Conditioner with Economizer

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown on Figures 10 and 11). 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 pages 27 and 28 to see the vent wiring diagram with this change called out.

FIGURE 11
Non-Programmable Thermostat Connections for Heat Pump with Economizer

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown on Figures 10 and 11). 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 pages 27 and 28 to see the vent wiring diagram with 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 performance.

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 areas.

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

1. 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.
     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. TABLE 2
     System Setup Menu Levels** Menu Level| Default Value| Range| Notes*
     ---|---|---|---
     INSTALL| 01/01/10| | Display Order = MM/DD/YY Setting Order = DD/MM/YY
     UNITS DEG| °F| °F / °C| Sets controller to read in either measurements
     EQUIPMENT| HP(B)| HP| Heat Pump HP   

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| ****

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

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 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

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 conditioner and heat pump equipment in order to have 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.

2. 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 current menu parameter.

   • For specific ADVANCED SETUP level information, refer to Table 3.

3. 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 current menu parameter.

   • For specific SETPOINTS level information, refer to Table 4 on page 16.
     NOTE: At this point, the economizer assembly should be fully functional and ready for preliminary testing. TABLE 4
     Setpoints Menu Levels** Menu Level| Default Value| Range| Notes**
     ---|---|---|---

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

(DB series only)

ENTH CURVE

|

ES3

| ES1, ES2, ES3,

ES4 or ES5

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

(WD series only)

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)

|

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: Minimum position setting has been preset to 10V which when connected to MC4002 Lead/Lag Controller System will allow 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.

4. 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 Menu Level| Notes
     ---|---
     DAMPER VMIN-HS| Positions damper to the minimum amount of opening allowed by 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 compressor
CONNECT Y2-O| Forces Y2-OUTPUT to compressor
CONNECT EXH1| Setpoint for damper if exhaust fan is powered by economizer
CONNECT EXH2| Setpoint for AUX output signal

CONNECT AUX

| Depending upon 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.

5. 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.
   • As the STATUS menu simply gives input/output information in real-time, there is no way to 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.
     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** Menu Level| Default Value| Notes**
     ---|---|---
     ECON AVAIL| YES/NO| Indicates if conditions are favorable for economizing
     ECONOMIZING| YES/NO| Indicates if economizer is actively economizing

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 opening
ACT COUNT| N/A| 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 has been removed (e.g., replaced faulty sensor), the alarm may erase itself. If a manual alarm-erasing is required, it can be cleared from the display by navigating to the desired alarm and pressing the 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  

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

NOTE: When using the Bard 8403-096 CO2 controller, configure the sensor to 2-10VDC output (see CO2 sensor instructions).
The JADETM 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 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 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

• 1st Stage Cooling closes and sends 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 opening to achieve preset MAT SET setting in SETPOINTS menu. Compressor operation is inhibited (see Figure 13).
• 2nd Stage Cooling closes and sends a signal to JADE™ control, which closes the Y1-O 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 14).
• 3rd Stage Cooling (if available) closes and sends a signal to JADE™ control, which closes the Y2-O relay to begin 2nd 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 14).

Condition – Warm/Humid OA Conditions

• 1st Stage Cooling closes and sends signal to JADE™ control. Since the OA conditions are above the preset DRYBULB SET/ENTH CURVE setting in the SETPOINTS menu, the control will simply close the Y1-O relay to initiate mechanical cooling. The economizer damper will remain closed or in a minimum ventilation setting depending upon occupied status (see Figure 15 on page 20).
• 2nd Stage Cooling (if available) closes and sends a signal to JADE™ control. Since the OA conditions are still above than the preset DRYBULB SET/ENTH CURVE setting in the SETPOINTS menu, the control will simply close the Y2-O relay
  to initiate 2nd stage mechanical cooling. The economizer damper will remain closed or in a minimum ventilation setting depending upon occupied status (see Figure 15).

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 Balance Climate fan speed simultaneously. If the outdoor conditions are not acceptable, the Y2 terminal will energize full load compressor and increase the fan speed to the rated air flow. When the temperature drops below the Y2 setpoint, the unit will return to part load and Balanced Climate fan speed. When the cooling call is satisÿed, the compressor will shut down and the economizer will move to minimum position (ventilation setting) and the fan will continue to run at RATED
air flow 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 connector is disconnected at JADETM controller to enable Balanced Climate mode (see wiring diagrams on pages 27 and 28).
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 economizer and the Balance Climate fan speed simultaneously. If the temperature continues to rise, the Y2 terminal will energize part load compressor and increase the fan speed to the RATED air flow. When the temperature drops below the Y2 setpoint, the unit will return to part load and Balanced Climate fan speed. When the cooling call is satisfied, the compressor will shut down and the economizer will move to minimum position
(ventilation setting) and the fan will increase to run at RATED air flow 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

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.
   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 JADETM controller (see wiring diagrams on pages 27 and 28)

FIGURE 16
CO2 Sensor Default and Final Settings Bard Part #8403-096 CO2 Controller

GRAPH 1
W/J18 Ventilation Delivery

FIGURE 17
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.

FIGURE 18
Wiring Diagram − Temperature Only 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.

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