INSTALLATION INSTRUCTIONS

COMMERCIAL ROOM VENTILATORS

WITH EXHAUST

MODEL

CHCRV-3

For Use with

Bard C**H Series 2 & 2½ Ton

2-Stage Wall Mount Heat Pumps

NOTE: CHCRV-3 Models must be installed with TCURB –

No Exceptions!

Bard Manufacturing Company, Inc.

Bryan, Ohio 43506

Since 1914...Moving ahead just as planned.

Manual : 2100-598

Supersedes: NEW

File: Volume III Tab 19

Date: 08-08-13

Manual 2100-598

Page 1 of 12

CONTENTS

General

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

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

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

Models ................................................................. 3

Commercial Room Ventilator –

C**H Series (Features) ............................................. 3

Installation

Basic Installation ..................................................4 - 5

CO

2

Control ............................................................... 6

Blade Adjustment for Desired Ventilation Air ............. 9

Sequence of Operation ...................................... 11-12

Figures

Figure 1 Removal of Exterior Panels & Air Filter .... 4

Figure 2 Condenser Exhaust Plate w/Screen ........ 5

Figure 3 Install Ventilator ........................................ 6

Figure 3A Vent Control Location ............................... 7

Figure 4 CO

2

Sensor Default Settings (8403-067) .. 8

Figure 5 (C**H) Call for Vent. with or without

Compressor Operation ........................... 11

Figure 6 (C**H) Call for Compressor or Fan Only ... with Ventilation Off ................................. 12

Graphs

Graph 1 C24H Vent Airflow .................................. 10

Graph 2 C30H Vent Airflow .................................. 10

Manual 2100-598

Page 2 of 12

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-3 ventilator is designed to be used with

Bard C24H1-* and C30H1-* Series Wall Mount heat pumps.

C24H1-* & C30H1-* 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.

COMMERCIAL ROOM VENTILATOR –

C**H 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.

Manual 2100-598

Page 3 of 12

INSTALLATION

BASIC INSTALLATION

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

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.)

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.

MODEL

CHCRV-3

FOR USE WITH

FOLLOWING UNITS

C24H1

C30H1

4. Remove the filter brackets and save. Install return fill on CRV with two (2) screws provided (See

Figure 2.)

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 or until right hole in CRV lines up with hole in condenser partition. (See

Figure 3.)

IMPORTANT: Position front lip of ventilator on top of front grille & condenser partition.

(See Figure 3 inset.) This is important to ensure proper drainage of any water entering damper assembly.

FIGURE 1

REMOVAL OF EXTERIOR PANELS AND AIR FILTER

BLOWER ACCESS PANEL

FILTER ACCESS PANEL

VENT OPTION PANEL

FILTER

SCREW

Manual 2100-598

Page 4 of 12

REMOVE AND

DISCARD RETURN

AIR FLANGE

MIS-3304

Once secure, remove the tape holding the rear extension and flip down. Push the locking plates down until screw locks into channel. Secure the rear blade bracket to the front blade with the screws provided

(See Figure 2).

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

7. Route four (4) wires (pink, purple/white, black/ white and orange) from CRV assembly down to and through 7/8" bushing on bottom left side of control panel and into low voltage terminal block section (See Figure 3).

8. Install the vent control board assembly in the upper left corner in unit control panel (See Figure

3A for reference on vent control location). Insert

7/8" bushing into hole on lower right side of low voltage terminal block enclosure. Route the red, yellow, purple and blue/white wires {pre-attached} to the vent control board into the low voltage terminal block section through this opening.

Reference Wiring Diagram 4056-221B (enclosed).

Connect wires as follows to 24V terminal block:

Yellow to Y

Purple to Y1

Blue/White to DH

Red to R

Purple/White to P1

Pink to P

Black/White to C with short jumper to the minus (-) terminal

Orange: If optional CO

2 connect to OCC. If no CO

sensor is used,

2

sensor is used, make no connection and tape off.

10. Close control panel cover

11. Replace the filter brackets, 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

R#1 Potentiometer on vent control. 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.

9. On the 24V terminal block, connect the forked terminal of the orange wire to O1, and the forked terminal of black/white wire to C. Route the remaining portion of orange and black/white wires with ¼" quick connects along with the pink and purple/white wires out of the low voltage terminal section and up to the vent control board. Connect these wires as follows to the vent control board:

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.

FIGURE 2

CONDENSER EXHAUST PLATE WITH SCREEN

SECURE RETURN FILL

WITH PROVIDED SCREWS

PUSH LOCKING PLATE

DOWN UNTIL SCREW

LOCKS INTO CHANNEL

REMOVE TAPE AND FLIP EXTENSION

DOWN FLUSH TO BOTTOM

SECURE BRACKET

TO MAIN BLADE WITH

PROVIDED SCREWS

MIS-3294

Manual 2100-598

Page 5 of 12

FIGURE 3

INSTALL VENTILATOR

Front of unit with doors removed

Blower motor leads shown as reference only

Ref. Step 7

Route the pink, purple/white, orange and black/white wires through the lower grommet and into low voltage terminal block area.

Ref. Step 5

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

Right side of

CRV in unit

Service Door

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-3302

CO

2

CONTROL

For CO

2

-based control, add a CO

2

sensor/controller

(Bard Part #8403-067) to the wall and run additional optional wires.

The CO

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

Manual 2100-598

Page 6 of 12

FIGURE 3A

VENT CONTROL LOCATION

MIS-3324

Manual 2100-598

Page 7 of 12

CO

2

FIGURE 4

SENSOR DEFAULT & FINAL SETTINGS

8403-067 CO2 CONTROLLER

PRESS UP AND DOWN

ARROWS TO ENTER

CONFIGURATION MODE

USE ARROWS TO SELECT

SETTING. PUSH MIDDLE

BUTTON TO CHANGE.

CONTROLLER WILL

SHOW SET.

NOTE: MENU

JUMPER MUST

BE SET TO "ON"

TO CHANGE ANY

SETTINGS WITH

THE FRONT BUTTONS.

TO LOCK THE CO2

CONTROLLER MOVE

JUMPER TO "OFF" AFTER

IT HAS BEEN CONFIGURED

JUMPERS MUST BE

POSITIONED AS SHOWN

FOR PROPER OPERATION

2-10V

4

4.5

5

5.5

6

2

2.5

3

3.5

8.5

9

9.5

10

6.5

7

7.5

8

AN (ppm) Damper (1)

700 FULLY CLOSED

750

800

850

900

950

1000

1050

1100

1150

1200

1250

1300

1350

1400

1450

1500 FULLY OPEN

8

9

10

11

12

6

7

14

15

16

17

Approc. Blade

Position (2)

0

1

4

5

2

3

Settings Recommended

RON

ROF

DSP

UNI

COL

COH

TOL

TOH

CAL

C

US

700

1500

Not Used

Not Used

Not Used

Not Used

Default

CT

US

0

2000

For High Altitude Installations

Used for Field Calibration

(1) Damper should be fully closed at 700 ppm, 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.

(2) Blade as referenced to the Blade Position Label.

MIS-3305

Manual 2100-598

Page 8 of 12

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.

C**H

17

Potentiometer R2. 14

Potentiometer R3. 12

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.

Manual 2100-598

Page 9 of 12

Manual 2100-598

Page 10 of 12

GRAPH 1

C24H VENT AIRFLOW

Data Pending

GRAPH 2

C30H VENT AIRFLOW

Data Pending

COMMERCIAL ROOM VENTILATOR

SEQUENCE OF OPERATION

On a call for blower operation, CRV opens to a position as set by #1 Potentiometer. See Figure 5.

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 6.

MIST

FIGURE 5

CALL FOR VENTILATION

WITH OR WITHOUT COMPRESSOR OPERATION

COOLING COIL SUPPLY AIR

ELIMINATOR

100% OUTDOOR AIR

CONDENSER AIR

CONDENSER COIL

AIR FILTER

RETURN AIR

EXHAUST AIR

MIS-3289

Manual 2100-598

Page 11 of 12

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 6.

FIGURE 6

CALL FOR COMPRESSOR OR FAN ONLY

WITH VENTILATION OFF

COOLING COIL SUPPLY AIR

MIST

ELIMINATOR

DAMPER BLADE

CONDENSER AIR

CONDENSER COIL

AIR FILTER

100% RETURN

AIR

MIS-3290

Manual 2100-598

Page 12 of 12