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INSTALLATION INSTRUCTIONS
COMMERCIAL ROOM VENTILATORWITH EXHAUST
ModelCRVS-1A
For Use with Bard 1 Ton Wall Mount Air Conditioner
Bard Manufacturing Company, Inc.Bryan, Ohio 43506
Since 1914....Moving ahead just as planned.
Manual : 2100-617 Supersedes: NEWFile: Tab 16Date: 06-04-14
Manual 2100-617 Page 2 of 15
CONTENTS
GENERALGeneral Information .................................................. 3Unpacking ................................................................. 3Description ................................................................ 3
INSTALLATIONBasic Installation ....................................................... 4Commercial Room Ventilator – WA Series.............. 10Blade Adjustment for Desired Ventilator Air ............ 14
FIGURESFigure 1 Remove Service Access Panel ................ 4Figure 2 Remove Filter Support Brackets, Filter and Exhaust Cover Plate ......................... 5Figure 3 Installing Ventilator in Unit ........................ 6Figure 4 Attaching Seal Plate ................................. 7Figure 5 CRVS-1A Lead Connectors ..................... 9Figure 6 Call for Blower Operation ....................... 10Figure 7 Call for Cooling Operation ...................... 11Figure 8A Low Voltage Wiring – A/C with Programmable Thermostat ...... 12Figure 8B Low Voltage Wiring – A/C with Non-Programmable Thermostat ............................................. 13Figure 9 CRV Position Adjustment ....................... 14
CHARTS & TABLESChart 1 W12AAA Total and Ventilation Airflow .... 15
BARD MANUFACTURING COMPANY, INC. BRYAN, OHIO USA 43506
Manual 2100-617 Page 3 of 15
GENERAL
GENERAL INFORMATIONThe ventilator should only be installed by a trained heating and air conditioning technician. These instructions serve as a guide to the technician installing the ventilator package. They are not intended as a step-by-step procedure with which a mechanically inclined owner can install the package.
The ventilator housing is shipped in one carton which contains the electrical harness, miscellaneous hardware and installation instructions.
UNPACKINGUpon receipt of the equipment be sure to compare the model number found on the shipping label with the accessory identification information on the ordering and shipping document to verify that the correct accessory has been shipped.
Inspect the carton housing of each ventilator as it is received, and before signing the freight bill, verify that all items have been received and that 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.
DESCRIPTIONThe CRVS-1A ventilator is designed to be used with Bard 1 ton wall mount series air conditioners. It is an electromechanical vent systems designed to provide fresh air to meet indoor air quality standards.
MODELS:
When installed in the above listed model, the CRV provides built in exhaust provisions. When the damper blade opens to bring fresh air in, the damper also opens an exhaust relief. The exhaust air will flow into the condenser section of the unit. The condenser fan will help draw exhaust air out.
Manual 2100-617 Page 4 of 15
1. Unpack the ventilator assembly which includes the integral ventilator with attached electrical harness, mixed air thermistor, miscellaneous hardware and installation instructions.
INSTALLATION
BASIC INSTALLATION
WARNINGOpen and lock unit disconnect switch before installing this accessory to prevent injury or death due to electrical shock or contact with moving parts. Turn thermostat to OFF.
MIS-3589
SERVICE DOOR
2. Remove and save the existing exterior service access panel on the Bard wall mount unit. (See Figure 1.)
NOTE: Removal of Barometric Fresh Air Damper (BFAD) may be required.
FIGURE 1REMOVE SERVICE ACCESS PANEL
Manual 2100-617 Page 5 of 15
RIGHT FILTERRACK
LEFT FILTERRACK
FILTERSEAL PLATE
MIS-3595
3. Remove and save existing right and left side filter support bracket. Remove and save filter.
4. Remove and discard the exhaust cover plate. (See Figure 2.)
FIGURE 2REMOVE FILTER SUPPORT BRACKETS, FILTER AND EXHAUST COVER PLATE
Manual 2100-617 Page 6 of 15
5. Install ventilator by inserting the ventilator into the unit to the far left side. Once the ventilator is fully inserted, slide the ventilator to the right until it is tight against the back of the control panel. (See Figure 3.)
FIGURE 3INSTALLING VENTILATOR IN UNIT
IMPORTANT: Position front lip of ventilator over the front grille. (See Figure 3 inset.) This is important to ensure proper drainage of any water entering damper assembly.
MIS-3594
MOLEX PLUGMIST ELIMINATOR
FRONT VEW
SIDE SECTIONVIEW
CONTROL PANEL
AND SERVICE DOOR
SERVICE DOOR
FRONT GRILL
BETWEEN GRILL PARTITIONCRV LIP IS TO BE CONDENSER
CRV VENTILATOR
Manual 2100-617 Page 7 of 15
6. Open unit control panel to gain access to unit low voltage terminal block.
7. Plug vent wire connector into the molex connector on the side of the control panel.
8. Add necessary jumpers on the low voltage terminal block. (See Figures 8a and 8b for connection diagrams.)
9. Close control panel cover.
10. Re-install filter brackets and filter.
11. Remove the two screws holding the seal plate on filter bracket and discard seal plate. Install new seal plate (part no. 536-755). Replace screws. See Figure 4.
FIGURE 4ATTACHING SEAL PLATE
ATTACH USING SCREWS FROMFILTER ANGLE
MIS-3596
Manual 2100-617 Page 8 of 15
12. Ventilator Checkout A. Remove mist eliminator to allow access to
minimum position thumbwheel or blade stops. B. Resupply power to unit. C. Energize the evaporator blower by switching
thermostat to the manual fan position with heat/cool in OFF position.
D. Ventilator should open to the position set by position adjustment thumbwheel on the CRVS. Cycle position adjustment thumbwheel to full open through full close. Observe damper blade operation throughout travel to assure free, unobstructed movement. (See Figure 5.)
E. De-energize evaporator blower. Damper blade should close.
F. This completes ventilator checkout.
13. Adjust damper blade for required ventilation airflow. (See next section.)
14. Replace mist eliminator. Be sure it is installed with the drain holes to the bottom.
15. Remove blank off plate or barometric fresh air damper installed on service access door. Plug four (4) mounting holes with the plastic plugs provided with the ventilator.
16. Replace service access panel.
17. Ventilator is now ready for operation.
Manual 2100-617 Page 9 of 15
FIGURE 5CRVS-1A LEAD CONNECTORS
XT
D
9
R
DM
BK
COLOR CODE
61
CONTROL RELAYCOMPONENT CODE
BLACK
BK
4056-224
DM
CR
CRVS
3
BROWN
B
DAMPER MOTOR
4
7
CR
REDORANGEYELLOWGREENBLUE
A
WHITE
BKBRROYGBLW
BR/W
Y/R
10 9 76
TERMINALSTRIP CE R A
MOLEXPLUG
Y/R
Manual 2100-617 Page 10 of 15
FIGURE 6CALL FOR BLOWER OPERATION
COMMERCIAL ROOM VENTILATOR – WA SERIES
FEATURES
• One piece construction; easy to install with no mechanical linkage adjustment required.
• Exhaust air damper built in with positive closed position.
• Actuator motor – 24 volt, power open, spring return with built in torque limiting switch.
• Provides up to 50 percent of outside air.
COMMERCIAL ROOM VENTILATOR SEQUENCE OF OPERATION
On a call for blower operation, CRV opens to position as set by minimum position potentiometer. See Figure 6.
Manual 2100-617 Page 11 of 15
FIGURE 7CALL FOR COOLING OPERATION
A call for cooling cycles the compressor and dampers remain in the ventilation mode. On loss of blower operation, CRV closes fully. See Figure 7.
Manual 2100-617 Page 12 of 15
YELLOW/RED
AC WITH PROGRAMMABLE THERMOSTAT
MIS-3597
REMOVE JUMPER FOR 2 STAGE ELECTRIC HEAT ON UNITSWITH 15 OR MORE KW
DO NOT CONNECT "A" FROM 8403-060 IF OPTIONAL CO2CONTROLLER IS USED
ADD JUMPER FROM "G" TO "E" ONLY IF OPTIONAL CO2 CONTROLLER IS INSTALLED
CHANGE MODEL CONFIGURATION FROM HEAT PUMP TO HEAT/COOL.MUST BE CONFIGURED TO PROGRAMMABLE AND FAN SET TO PROGRAMMED FAN FOR THE "A" OUTPUT TO FUNCTION DURING SCHEDULED OCCUPIED PERIODS.
4
2
1
OPTIONALVENT PACKAGE
3
RED
UNIT 24VTERMINAL BLOCK
BLACK BROWN/WHITE
4
3
Y2
W1/E
A
C
C R G 1 2 3Y W1 W2 Y1
1
GR Y1 W2 AYO/D LO/BY2
FE
2
62 3 4 51 OPTIONAL 8403-067CO2 CONTROLLER
ELECTRONICPROGRAMABLE
8403-060THERMOSTAT
LOW VOLTAGE WIRING
CRV
MIS-3597
FIGURE 8ALOW VOLTAGE WIRING
A/C WITH PROGRAMMABLE THERMOSTAT
Manual 2100-617 Page 13 of 15
5
C Rc R G Y W O B
CRV
R G Y W1 W2 Y1 Y2 1 2 3 E F AC
C Rc R G Y W W2 Y2
1 2 3 4 5 6
1
2
3
4
MIS-3598
OPTIONALVENT PACKAGE
31
UNIT 24VTERMINAL BLOCK
2 STAGE COOL2 STAGE HEATTHERMOSTAT
1 STAGE COOL1 STAGE HEATTHERMOSTAT
8403-057(TH3110D1040)
8403-058(TH5220D1151)
OPTIONAL 8403-067CO2 CONTROLLER
LOW VOLTAGE WIRINGAC WITH NON-PROGRAMMABLE THERMOSTAT
ADD JUMPER FROM "G" TO "E" ONLY IFOPTIONAL CO2 CONTROLLER IS INSTALLED
CHANGE "SYSTEM TYPE", SET UP FUNCTION 1, FROM 5 (2 HEAT/ 1 COOL HEAT PUMP)TO 6 (2 HEAT/ 2 COOL CONVENTIONAL).
ADD JUMPER IF OPTIONAL CO2 CONTROLLER IS NOT USED,VENT WILL RUN WHILE BLOWER IS ENERGIZED. DO NOTINSTALL JUMPER IF OPTIONAL CO2 CONTROLLER INSTALLED,AND SEE NOTE 6.
FACTORY INSTALLED JUMPER
REMOVE JUMPER FOR 2 STAGE ELECTRIC HEAT ON UNITSWITH 15 OR MORE KW
BROWN/WHITE
YELLOW/RED
BLACK
RED
4 2
52
FIGURE 8BLOW VOLTAGE WIRING
A/C WITH NON-PROGRAMMABLE THERMOSTAT
Manual 2100-617 Page 14 of 15
FIGURE 9CRV POSITION ADJUSTMENT
BLADE ADJUSTMENT FOR DESIRED VENTILATOR AIRThe amount of ventilation air supplied by the commercial room ventilator is dependent on five (5) factors. 1. Return air duct static pressure drop. 2. Supply air duct static pressure drop. 3. Indoor blower motor speed. 4. Damper blade open position setting. 5. Tightness or looseness of building envelope.
Determine on what speed the evaporator motor is running.
Refer to the graphs on the following pages to determine the blade setting necessary to achieve the ventilation air required. With the blower energized, use the thumbwheel on the CRVS-1A to adjust blade to desired blade position.
CLASSROOOM VENTILATOR MOTOR
MIS-2719
NOTE: POSITION ADJUSTMENTTHUMBWHEEL IS LOCATED ON BACK OF MOTOR ABOVETHE WIRING TERMINALS
ACTUATORMOTOR
FRONT OF
ADJUSTMENT THUMBWHEEL
ROTATE UP TO OPENDOWN TO CLOSE
POSITION WITH THUMBWHEELADJUST FULL OPEN
POSITIONADJUSTMENTTHUMBWHEEL
Manual 2100-617 Page 15 of 15
Brown/white wire must be switched from terminal X to terminal D on damper motor to attain “D” position.This will bypass potentiometer function and go to “full open” when energized.
0
100
200
300
400
500
600
A B C D
Vent Position
Total Air 0.0 ESP
Total Air 0.1 ESP
Total Air 0.2 ESP
Total Air 0.3 ESP
Vent Air 0.0 ESP
Vent Air 0.1 ESP
Vent Air 0.2 ESP
Vent Air 0.3 ESP
CHART 1W12AAA TOTAL AND VENTILATION AIRFLOW
