Bard CRV-F2, CRV-F3 Installation Instructions Manual

INSTALLATION INSTRUCTIONS

Partial Flow

Commercial Room Ventilator

24 Volt On/Off

with Spring Return and Exhaust

Models:

CRV-F2 CRV-F3

For Use with Bard Single Stage Wall Mount

Air Conditioner and Heat Pump Models:

CRV-F2
CRV-F3

: W18A/LB, W24A/LB, W18HB, W24HB
: W30A/LB, W36A/LB, W30HB, W36HB

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

www.bardhvac.com

Manual: 2100-691
Supersedes: NEW
Date: 3-1-19

Page 1 of 15

CONTENTS

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

Commercial Room Ventilator Model Nomenclature ...

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

General ..............................................................3

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

Application .........................................................3

Installation of Field-Installed CRV-F* .................4

Basic Installation .................................................4

Preparing Unit for CRV-F Installation ................. 4

Commercial Room Ventilator (CRV) No Hood

Installation .....................................................7

Blade Adjustment for Desired Ventilation Air ........11

3

Figures

Figure 1 Wall Mount Unit Access Panels ............. 4

Figure 2 Condenser Exhaust Plate with Screen..... 5

Figure 3 Filter Bracket and Filter Bracket

Fill Plate Installation ............................ 6

Figure 4 Extension Cable Installation .................. 7

Figure 5 Damper Assembly Installation ............... 8

Figure 6 Vent Door Assembly .............................. 8

Figure 7 Required Control Connections for CRV

with Air Conditioners ............................ 9

Figure 8 Required Control Connections for CRV

with Heat Pumps ............................... 10

Figure 9 Blade Adjustment For Desired

Ventilation Air .................................... 11

Figure 10 Call for Ventilation With or Without

Compressor Operation ........................ 14

Figure 11 Call for Compressor or Fan Only with

Ventilation Off ................................... 15

Graphs

Graph 1 W18 Ventilation Delivery ...................... 12

Graph 2 W24 Ventilation Delivery ...................... 12

Graph 3

Graph 4 W36 Ventilation Delivery ...................... 13

W30 Ventilation Delivery ....................... 13

CRV 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 2100-691
Page 2 of 15

GENERAL INFORMATION

Commercial Room Ventilator Model Nomenclature

CRV – F 2

COMMERCIAL ROOM VENTILATOR

FIXED (24V ON/OFF)

CHASSIS SIZE

2 – 1.5 & 2 Ton Models
3 – 2.5 & 3 Ton Models

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.

General

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 step­by-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.

Description

Commercial room ventilators CRV-F2 and CRV-F3 are
designed to be used with the specific models with
"letter" revision codes as designated on the front page
of this installation instructions manual.

The CRV-F ventilator is an electromechanical vent
system designed to provide fresh air to meet indoor air
quality standards.

Commercial room ventilators CRV-F2 and CRV-F3 are
internally mounted dampers with exhaust designed
to provide up to 50% fresh air. The damper blade
is powered by a 24 VAC motor with spring return on
power loss. The damper is powered open anytime A
is energized. Blade stop screws are located under the
fresh air blade and will provide 10 different airflow
settings.

When installed in the models listed on the front page,
the CRV-F 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.

Application

The amount of outside fresh air brought into the
structure is dependent on the supply and return duct
static pressure present in the duct system. Refer to
Graphs 1-4 on pages 12-13 for ventilation air that
will be supplied at different blade settings and duct
static pressures. For duct-free applications with return
air filter grilles and supply grilles, use 0.00 supply air
static pressure.

Manual 2100-691
Page 3 of 15

INSTALLATION OF FIELD-INSTALLED CRV-F*

Basic 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.

Preparing Unit for CRV-F Installation

1. Disconnect power to unit.

2. Unpack the CRV-F assembly, which includes the

integral controls and electrical harness, body
panels, miscellaneous hardware and installation
instructions.

Wall Mount Unit Access Panels

3. From existing wall mount unit, remove and save (or
discard) as directed (see Figure 1):

• Blower access panel (save)

• Vent option panel (save)

• Filter access panel (save)

• Filter (save)

• Outer and inner control panel doors (save)

• Filter tray (discard, if applicable)

• Exhaust cover plate (discard)

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

5. Remove filter brackets, if necessary. Two types
of filter brackets have been used with these wall
mount units. If the filter brackets are mounted
flat, they can be used with the commercial room
ventilator (CRV). If the brackets are set at a 30°
angle, they must be removed and discarded. The
circuit breaker offset plate must be loosened and
moved slightly to gain access to several of the
screws holding the filter brackets in place. Tighten
the screws holding control panel after the filter
brackets have been removed.

FIGURE 1

BLOWER ACCESS PANEL

FILTER ACCESS PANEL

VENT OPTION PANEL

FILTER TRAY

EXHAUST COVER PLATE

(THIS PLATE IS DISCARDED)

FILTER

SCREW

CIRCUIT BREAKER
ACCESS DOOR

CONTROL
PANEL DOOR

MIS-3987

Manual 2100-691
Page 4 of 15

FIGURE 2

Condenser Exhaust Plate with Screen

Condenser Exhaust Plate with Screen

PARTITION COVER

INSTALL COVER PLATE

SCREEN MEDIA FACING

PARTITION

CONDENSER PARTITION

4 SCREWS

PLATE

PARTITION SUPPORT ANGLE
SHOWN FACING DOWN
(HIDDEN)

MIS-3633

If filter brackets were removed in Step 5, proceed

to Step 6. If the brackets were not removed,
proceed to Commercial Room Ventilator (CRV) No
Hood Installation on page 7.

6. Install filter bracket fill plate (if applicable) as
shown in Figure 3 on page 6.

7. Install provided filter brackets on CRV-F assembly
(see Figure 3).

Manual 2100-691
Page 5 of 15