Bard I42H1D Changing Ventilation CFM Rates in Manual Mode, Changing to Fully Modulating Mode

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RECOMMENDED CONTROL SEQUENCES

Several possible scenarios are listed below:

1.Use a programmable electronic thermostat with auxiliary terminal to control the ERV based on daily programmed occupance periods. Bard markets and recommends Bard Part #8403-060 programmable electronic thermostat.

2.Use a motion sensor in conjuntion with a mechanical thermostat to determine occupancy in the structure. Bard markets the CS2000A for this use.

3.Use a DDC control system to control the ERV based upon a room occupancy schedule to control the ERV.

4.Tie the operation of the ERV into the light switch. The lights in a room are usually on only when occupied.

5.Use a manual timer that the occupants turn to energize the ERV for a specific number of hours.

6.Use a programmable mechanical timer to energize the ERV and indoor blower during occupied periods of the day.

NOTE: The ventilation package comes with a blower interlock function, but is disabled when it is shipped from the factory in case you do not utilize a thermostat with an occupancy output, or a occupancy sensor and must tie "A" terminal to "G" terminal to drive the ventilation package. If you do have a thermostat or control that does drive occupancy output, you will need to remove the tape from the orange wire located in the low voltage terminal box, and connect it to the "G" terminal to activate this function. (See Figures 13-19.)

CHANGING VENTILATION CFM RATES IN MANUAL MODE

!

WARNING

 

HAZARD OF ELECTRICAL SHOCK.

 

ELECTRICAL SHOCK CAN RESULT

 

IN SERIOUS INJURY OR DEATH.

2

DISCONNECT THE REMOTE

-

-754

ELECTRIC POWER SUPPLY OR

7961

SUPPLIES BEFORE SERVICING.

 

To adjust the airflow ventilation rate, first refer to Figure 25A to look up the “FLOW INDEX” needed for the intake and exhaust blowers for the CFM you require. Then, perform the following steps:

1.Open front swinging doors of main unit (by popping front door latches).

2.Throw main power disconnect to the “OFF” position to eliminate risk of injury or death due to electrical shock.

3.Remove five (5) screws holding front ERV door in place (See Figure 27).

4.Remove ERV Control Panel Cover by removing four (4) screws (See Figure 27).

5.Locate two 0-10Vdc Motor Control Boards in control panel (See Figure 28).

6.On intake Motor Control Board, observing “GREEN STATUS LIGHT”, turn manual adjust potentiometer “CCW” to increase “FLOW INDEX” or CW to reduce “FLOW INDEX” to

match desired setting.

NOTE: After long pause, the green status light will blink long-blinks for the “TEN COUNT” of the “FLOW RATE INDEX”, then immediately followed by fast blinks which indicate the second digit. For example, a Flow Index of 23 would be two long blinks, followed by 3 fast blinks of the “GREEN STATUS LIGHT”.

7.On exhaust Motor Control Board, observing “GREEN STATUS LIGHT”, turn manual adjust potentiometer “CCW” to increase “FLOW INDEX” or CW to reduce “FLOW INDEX” to

match desired setting.

NOTE: Same “GREEN STATUS LIGHT” blink as Step #6.

CHANGING TO FULLY MODULATING MODE

If you want to operate the ERV in fully variable mode (Fig. 25B) (only run at required speed to maintain set-point CO2 levels), you will need to configure the ERV to the following:

1.Open front swinging doors of main unit (by popping front door latches).

2.Throw main power disconnect to the “OFF” position to eliminate risk of injury or death due to electrical shock.

3.Remove ERV Control Panel Cover by removing four (4) screws (See Figure 27).

4.Locate two 0-10Vdc Motor Control Boards in control panel (See Figure 28).

5.Pull jumper pins from “M” terminals, and move to “P” terminals (See Figure 28).

6.Connect “+” 0-10Vdc output from CO2 control to Terminal #3 (along with pink wire), and connect “-” to Terminal #4 (along with purple wire) of unit low voltage terminal strip.

7.Follow the directions supplied with the CO2 control to configure the control appropriately.

Manual

2100-549G

Page

41 of 59

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Contents TEC Series Packaged Heat Pump Contents For More INFORMATION, Contact These Publishers Getting Other Information and PublicationsAnsi Z535.5 Definitions GeneralIndoor Blower Performance Factory BUILT-IN Electric Heat TableElectrical Specifications Unit Dimensions Unit Specification SheetHandling Unit After Removal from Skid Shipping DamageUnit Removal from Skid Wall Mounting Bracket Location Minimum Installation HeightSeismic Considerations Bracket Wall Section View Center of Gravity Center of GravityRequired Clearances & Recommended Access Removal of AIR Duct Compressor Shipping BoltsDucted Application Basic Unit 3 Riser Application 6 Riser Application Filters Duct WorkSupply Duct Connections Filter LocationCondensate Drain With Energy Recovery VentilatorWith no Vent Option With Commercial Room Ventilator16 3/4 NON-TAPPING 16 1/2 NON-TAPPING Unit MountingTEC Unit Component Location Wiring Main PowerMounting the Unit LOW Voltage Connections Wiring LOW Voltage WiringOperating Voltage Range Wall ThermostatsSC SC SC Basic Heat Pump with no Ventilation PackageHeat Pump with CRV, Without CO2 Control Y2 B/W1 W2 W3 CRV Wiring HarnessTo function Heat Pump with CRV and CO2 ControlHeat Pump with ERV, Without CO2 Control ERV Wiring HarnessHeat Pump with ERV and CO2 Control ON/OFF Cycling Heat Pump with ERV and CO2 Control Fully Modulating ERV Wiring Harness Bard #8403-067Heat Pump with Combination CRV and DB Economizer N Vent Code Topping OFF System Charge Safety PracticesPhase Monitor Important Installer NoteThree Phase Scroll Compressor Start UP Information Service HintsSound Pressure Service PortsSequence of Operation Defrost Cycle Defrost CycleSetting the Ventilation CFM Levels Control WiringTeccommercial Room Ventilator System General Description Recommended Control SequencesVent Option INTAKE/EXHAUST Speeds CRV Motor SPEED/CFM ConfigurationCRV Speed Change Terminal Access Control Wiring Economizer Control Circuit TECECON. Sequence of OperationMotor SPEED/CFM Configuration Heating Mode OperationVentilation Mode Tecenergy Recovery Ventilator System General Description Changing to Fully Modulating Mode Changing Ventilation CFM Rates in Manual ModeWinter Heating Performance Indoor Design Conditions 70F DB Performance and Application DataERV Modulating Mode Jumper PIN on P Terminal ERV Manual Mode Jumper PIN on M TerminalIndoor Air Supply Air Outdoor Air Ventilation Airflow DiagramERV Access Control Board CONFIGURATION/SETTING SpecificationsAccessing Menu Parameters WiringMounting Selection of Voltage OutputsMenu Descriptions Cleanability and Performance Energy Recovery Ventilator Maintenance General InformationMaintenance Procedures Quarterly Maintenance FrequencyAnnual Maintenance Codes Function Solid State Heat Pump Control Troubleshooting ProcedureTroubleshooting Temperature F VS Resistance R of Temperature Sensor Checking Temperature SensorTroubleshooting ECM 142R Outdoor FAN Motor Cooling Mode Troubleshooting ECM 142R Outdoor FAN MotorHeat Pump Mode Replacing the MotorTroubleshooting Indoor ECM Blower Motors Troubleshooting Indoor ECM Blower Motors Cont’d Control Connector Motor Half FAN Blade Setting DimensionsPower Connector Motor Half Refrigerant ChargeFull Load Heating PRESSURE/TEMPERATURE Full Load Cooling PRESSURE/TEMPERATUREPart Load Heating PRESSURE/TEMPERATURE Part Load Cooling PRESSURE/TEMPERATURE