2100-450

INSTALLATION INSTRUCTIONS

COMMERCIAL ROOM VENTILATORS

WITH EXHAUST

MODEL

CHCRV-5

For Use with Bard CH Series 3, 4 & 5 Ton

2-Stage Wall Mount Heat Pumps

AND

W38H, W43H, W49H and W61H

Single Stage Wall Mount Heat Pumps

Bard Manufacturing Company, Inc.

Bryan, Ohio 43506

Since 1914...Moving ahead just as planned.

Manual : 2100-450 I

Supersedes: 2100-450H

File: Volume III Tab 19

Date: 09-21-10

Manual 2100-450 I

Page 1 of 16

CONTENTS

General

General Information ................................................. 3

Unpacking ................................................................ 3

Description ............................................................... 3

Installation

Basic Installation ................................................. 4 - 6

CO

2

Control ....................................................... 6 & 7

CRV Control Wiring ................................................. 8

Blade Adjustment for Desired Ventilation Air ......... 10

Commercial Room Ventilator –

CH Series ...................................................... 13 & 14

Commercial Room Ventilator –

W**H Series .................................................. 15 & 16

Figures

Figure 1 Removal of Exterior Panels, Air Filter and

Exhaust Cover Plate ............................... 4

Figure 2 Install Ventilator ...................................... 5

Figure 3 CO

2

Sensor Default Settings ................... 7

Figure 4 CO

2

Sensor Final Settings ...................... 7

Figure 5A Lead Connections for CH Series ............ 8

Figure 5B Lead Connections for W**H .................... 9

Figure 6 (CH) Call for Vent. w/ or w/o Compressor .

Operation .............................................. 13

Figure 7 Call for Comp. or Fan Only w/Vent Off .. 14

Figure 8 (W**H) Call for Vent. w/ or w/o Compressor

Operation .............................................. 15

Figure 9 (W**H) Call for Compressor or Fan Only w/

Vent. Off ................................................ 16

Graphs

Graph 1 CH3S1 & W38H1 Vent Airflow .............. 10

Graph 2 CH4S1, W49H1, W61H1 Vent Airflow .... 11

Graph 3 CH5S1 Vent Airflow ............................... 11

Graph 4 W43H1 with CHCRV-5 .......................... 12

Manufactured under U.S. patent number 5,301,744

Other patents pending

Manual 2100-450 I

Page 2 of 16

COPYRIGHT DECEMBER 2004

BARD MANUFACTURING COMPANY, INC.

BRYAN, OHIO USA 43506

GENERAL

GENERAL INFORMATION

The 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 the 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.

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 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.

DESCRIPTION

The CHCRV-5 ventilator is designed to be used with

Bard CH Series 3 through 5 ton wall mount series heat pumps and Bard W38H, W43H, W49H and W61H

Series 3 through 5 ton wall mount series heat pumps.

They are electromechanical vent systems designed to provide fresh air to meet indoor air quality standards.

MODELS:

When installed in the above-listed models, 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 when it is operating with compressor in cooling or heat pump mode.

Manual 2100-450 I

Page 3 of 16

INSTALLATION

BASIC INSTALLATION

1. Unpack the ventilator assembly which includes the integral ventilator with attached electrical harness and miscellaneous hardware.

M O D E L

C H C R V 5

C H 3 S 1

F O R U S E

F O L L O W I N G

W I T H

U N I T S

C H 4 S 1 C H 5 S 1

W 3 8 H 1 W 4 3 H 1 W 4 9 H 1 / W 6 1 H 1

WARNING

Open 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.

2. Remove and save the existing exterior blower access, filter access and service access panels on the

Bard wall mount unit. (See Figure 1.)

3. Remove and save existing unit air filter and screws from front center grille. (See Figure 1.)

4. Remove and discard CRV exhaust cover plate only for CH and W38-61H models.

5. Install ventilator by inserting the ventilator into the unit to the far left side clearing the right filter bracket. 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 2.)

FIGURE 1

REMOVAL OF EXTERIOR PANELS, AIR FILTER AND EXHAUST COVER PLATE

CH UNIT

SHOWN

Blower Access

Panel

Filter

Manual 2100-450 I

Page 4 of 16

Filter Access

Panel

Service Access

Panel

Screw

Back Cover Plate

MIS-2029 A

IMPORTANT: Position front lip of ventilator on top of front grille and condenser partition. (See

Figure 2 inset.) This is important to ensure proper drainage of any water entering damper assembly.

6. Open control panel to gain access to unit low voltage terminal block.

7. Route electrical harness leads through the 7/8" bushings in control panel (See Figure 2) into low voltage box.

8. Install the vent control board in the upper left corner of the control panel. Route the pink, purple and black wires through the upper grommet.

FIGURE 2

INSTALL VENTILATOR

Front of unit with doors removed

Route the pink, purple, and black wires through the upper grommet.

Route orange wire through hole and into low voltage terminal block area.

Right side of

CRV in unit

Service Door

When installing CRV position so hole in front lip is centered over hole in condenser grille to insert a self drilling screw.

FIGURE 3 INSET

SIDE SECTION

Lip of CRV is to be between the condenser grille and service door

Front Grille

Note:

Plug the (4) Ø.125 holes in the service door with canoe clips.

MIS-2030

Manual 2100-450 I

Page 5 of 16

9. Connect purple wire from CHCRV to P terminal on vent control. Connect pink wire from CHCRV to

P1 on vent control. Connect black wire from

CHCRV to C on vent control. Connect orange wire from CHCRV to 01 terminal on unit low voltage terminal block. Connect black wire from vent control to C terminal on low voltage terminal strip.

Connect purple wire from vent control to Y1 terminal on low voltage terminal strip. Connect yellow wire from vent control to Y terminal on low voltage terminal strip. Connect red wire from vent control to R on low voltage terminal strip.

10. Close control panel cover

11. Replace left filter support, filter and four (4) screws in condenser grille.

12. Reinstall the blower access panel at top of unit and secure with sheet metal screws.

13. Ventilator Checkout

A. Resupply power to unit.

B. Energize the evaporator blower by switching thermostat to the manual fan position with heat/ cool in OFF position.

C. Ventilator should open to the position set by

#1 Potentiometer on vent control. Cycle position adjustment thumbwheel to full open through full close. Observe damper blade operation throughout travel to assure free, unobstructed movement.

D. De-energize evaporator blower. Damper blade should close.

E. This completes ventilator checkout.

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.

CO

2

CONTROL

For CO

2

-based control, add a CO

2

sensor/controller

(Bard Part #8403-056) to the wall and run additional optional wires as shown in Figure 5.

The CO

2 controller also must be re-configured from the standard default settings as it comes out of the box. See next page for complete details.

Manual 2100-450 I

Page 6 of 16

FIGURES 3 & 4

CO

2

SENSOR DEFAULT & FINAL SETTINGS

Manual 2100-450 I

Page 7 of 16

Manual 2100-450 I

Page 8 of 16

Manual 2100-450 I

Page 9 of 16

BLADE ADJUSTMENT FOR DESIRED

VENTILATOR AIR

The amount of ventilation air supplied by the commercial room ventilator is dependant on four (4) 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.

Refer to the graph below to determine the blade setting necessary to achieve the ventilation air required for each operating mode.

FACTORY DEFAULT SETTINGS ARE:

Potentiometer R1.

CH

17

W**H

17

Potentiometer R2.

Potentiometer R3.

14

12

14

NA

For more accurate adjustment, use a flowhood over the intake opening to measure and adjust the airflow operation.

Potentiometer R1. Adjusts the airflow during blower operation only.

Potentiometer R2. Adjusts the airflow during 1st stage cooling or heating operation.

Potentiometer R3. Adjusts the airflow during 2nd stage cooling or heating operation.

Energize blower only mode and adjust #1 Potentiometer to desired airflow.

Energize 1st stage cooling mode and adjust #2

Potentiometer to desired airflow.

Energize 2nd stage cooling mode and adjust #3

Potentiometer to desired airflow.

Minimum damper position when using CO

2

control damper should be fully closed at 700 ppm or lower, if not Potentiometer R7 can be adjusted clockwise (CW) to close it. If it is fully closed at 700 ppm or lower, no adjustments required.

700

600

500

400

300

200

100

0

0

Manual 2100-450 I

Page 10 of 16

5

GRAPH 1

CH3S1 & W38H1 VENT AIRFLOW

10

Blade Position

15 20

Stage 2

Stage 1

Ventilation

GRAPH 2

CH4S1, W49H1 & W61H1 VENT AIRFLOW

600

500

400

300

200

100

0

0

900

800

700

500

400

300

200

100

0

0

800

700

600

5 10

Blade Position

GRAPH 3

CH5S1 VENT AIRFLOW

15 20

Stage 2

Stage 1

Ventilation

Stage 2

Stage 1

Ventilation

5 10

Blade Position

15 20

Manual 2100-450 I

Page 11 of 16

GRAPH 4

W43H1 with CHCRV-5

700

rf

Ai

600

)

FM

(C

500

400

300

200

100

0

0 4

Vent Air, Blower/Vent Mode

8

Blade Position

12 17

Vent Air, Cooling/Heating Mode

Manual 2100-450 I

Page 12 of 16

COMMERCIAL ROOM VENTILATOR –

CH SERIES

FEATURES

•

One piece construction – easy to install with no mechanical linkage adjustment required.

•

Exhaust air damper – built in with positive closed position. Provides exhaust air capability to prevent pressurization of tight buildings.

•

Actuator motor – 24 volt, power open, spring return with built in torque limiting switch.

COMMERCIAL ROOM VENTILATOR

SEQUENCE OF OPERATION

On a call for blower operation, CRV opens to a position as set by #1 Potentiometer. See Figure 6.

NOTE: These sequence descriptions do not apply if CO

2 controller is used. The CRV will control according to observed CO

2

levels in the conditioned space. Refer to information on Page 7.

FIGURE 6

CALL FOR VENTILATION

WITH OR WITHOUT COMPRESSOR OPERATION

Supply Air

Evaporator

Coil

Outside Air Return Air

Damper Blade

Exhaust Air

Condenser Air

Direction

Condenser

Coil

MIS-1944 A

Manual 2100-450 I

Page 13 of 16

A call for 1st stage cooling or heating cycles the compressor, and the dampers reposition to the

Potentiometer #2 setpoint. A call for 2nd stage cooling or heating energizes compressor solenoid and repositions the damper blade to the Potentiometer

#3 position. On loss of blower operation, CRV closes fully. See Figure 7.

FIGURE 7

CALL FOR COMPRESSOR OR FAN ONLY

WITH VENTILATION OFF

Supply Air

Evaporator

Coil

Return Air

Damper Blade

Condenser Air

Direction

Condenser

Coil

MIS-2031 A

Manual 2100-450 I

Page 14 of 16

COMMERCIAL ROOM VENTILATOR –

W38, W43 W49 & W61H MODELS

FEATURES

•

One piece construction – easy to install with no mechanical linkage adjustment required.

•

Exhaust air damper – built in with positive closed position. Provides exhaust air capability to prevent pressurization of tight buildings.

•

Actuator motor – 24 volt, power open, spring return with built in torque limiting switch.

COMMERCIAL ROOM VENTILATOR

SEQUENCE OF OPERATION

On a call for blower operation, CRV opens to a position as set by #1 Potentiometer. See Figure 8.

NOTE: These sequence descriptions do not apply if CO

2 controller is used. The CRV will control according to observed CO

2

levels in the conditioned space. Refer to information on Page 7.

FIGURE 8

CALL FOR VENTILATION

WITH OR WITHOUT COMPRESSOR OPERATION

Evaporator

Coil

Supply Air

Outside Air

Condenser Air

Direction

Condenser Coil

Return Air

Damper Blade

Exhaust Air

MIS-2829 A

Manual 2100-450 I

Page 15 of 16

A call for 1st stage cooling or heating cycles the compressor, and the dampers reposition to the

Potentiometer #2 setpoint. On loss of blower operation,

CRV closes fully. See Figure 9.

FIGURE 9

CALL FOR COMPRESSOR OR FAN ONLY

WITH VENTILATION OFF

Evaporator

Coil

Supply Air

Manual 2100-450 I

Page 16 of 16

Condenser Air

Direction

Condenser Coil

Return Air

Damper Blade

MIS-2835 A