Bard WCRVPS2P User manual

Page 1 of 19
COMMERCIAL ROOM VENTILATOR
WITH SPRING RETURN AND EXHAUST
Models:
INSTALLATION INSTRUCTIONS
WCRVPS2P WCRVPS3P WCRVPS5P WCRVPS6P
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 2100-667
Supersedes: NEW
Date: 2-14-17
For Use with Bard Single Stage Wall Mount
Air Conditioner and Heat Pump Models:
WCRVPS2P: W18A/L*, W24A/L*, W18H*, W24H*
WCRVPS3P: W30A/L*, W36A/L*, W30H*, W36H*
WCRVPS5P: W42A/L*, W48A/L*, W60A/L*
W42H*, W48H*, W60H*
WCRVPS6P: W72A/L*

Manual 2100-667
Page 2 of 19
General Information ...............................................3
Commercial Room Ventilator Model Nomenclature... 3
Unpacking ..........................................................3
General ..............................................................3
Description .........................................................3
Models ...............................................................3
Installation of Field-Installed WCRVPS*P .........4
Basic Installation................................................. 4
Control System Notes...........................................9
Blade Adjustment for Desired Ventilation Air ........14
Commercial Room Ventilator...............................18
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 CRV Control Board ............................. 10
Figure 8 Required Control Connections for CRV
with Air Conditioners .......................... 11
Figure 9 Required Control Connections for CRV
with Heat Pumps ............................... 12
Figure 10 CO2Sensor Default and Final Settings
Bard Part #8403-067 CO2Controller ... 13
Figure 11 Call for Ventilation With or Without
Compressor Operation ........................ 18
Figure 12 Call for Compressor or Fan Only with
Ventilation Off ................................... 19
Graphs
Graph 1 W18AA Part Floor Ventilation Delivery... 14
Graph 2 W24AA Ventilation Delivery.................. 15
Graph 3
W30AA and W36AA Ventilation Delivery 15
Graph 4 W42AA and W48AA Ventilation Delivery 16
Graph 5 W60AA Ventilation Delivery.................. 16
Graph 6 W72AA Ventilation Delivery.................. 17
BARD MANUFACTURING COMPANY, INC.
BRYAN, OHIO USA 43506
CONTENTS

Manual 2100-667
Page 3 of 19
GENERAL INFORMATION
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
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.
DESCRIPTION
The WCRVPS*P ventilator is designed to be used
with the specific models with "letter" revision codes
as designated on the front page of this installation
instructions manual.
The ventilator is an electromechanical vent system
designed to provide fresh air to meet indoor air quality
standards.
MODELS
When installed in the models listed on the front page,
the WCRVPS*P 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 MODEL NOMENCLATURE
W CRV P S 5 P
WALL MOUNT
CHASSIS SIZE
2 – 1.5 & 2 Ton Models
3 – 2.5 & 3 Ton Models
5 – 3.5 thru 5 Ton Models
6 – 6 Ton Models
SPRING RETURN
COMMERCIAL ROOM
VENTILATOR
PLUG-IN CONNECTION
PARTIAL FLOW
P – Partial Flow
Blank – Full Flow

Manual 2100-667
Page 4 of 19
INSTALLATION OF FIELD-INSTALLED WCRVPS*P
BASIC INSTALLATION
Electrical shock hazard.
Disconnect remote electrical power supply
or supplies before servicing.
Failure to do so could result in electric
shock or death.
!WARNING
Preparing Unit for WCRVPS*P Installation
1. Disconnect power to unit.
2. Unpack the WCRVPS*P assembly, which includes
the integral controls and electrical harness, body
panels, miscellaneous hardware and installation
instructions.
FIGURE 1
Wall Mount Unit Access Panels
3. From existing wall mount unit, remove and save (or
discard) as directed (see Figure 1):
• Ventilation option panel (discard)
• 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 condensor 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.
ACCESS DOOR
CONTROL
BLOWER ACCESS PANEL
(THIS PANEL IS DISCARDED)
(THIS PLATE IS DISCARDED)
EXHAUST COVER PLATE
SCREW
FILTER
VENT OPTION PANEL
PANEL DOOR
CIRCUIT BREAKER
FILTER ACCESS PANEL
MIS-3877
FILTER TRAY
(THIS TRAY IS DISCARDED
ONLY FOR WCRVPS2P, WCRVPS3P)

Manual 2100-667
Page 5 of 19
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 WCRVPS*P
assembly (see Figure 3).
MIS-3633
FIGURE 2
Condenser Exhaust Plate with Screen
MIS-3633
Condenser Exhaust Plate with Screen
ANGLE SHOWN (HIDDEN)
PARTITION SUPPORT
PARTITION COVER
CONDENSERPARTITION
PLATE 4 SCREWS
INSTALL COVER PLATE
SCREEN MEDIA FACING
PARTITION

Manual 2100-667
Page 6 of 19
FIGURE 3
Filter Bracket and Filter Bracket Fill Plate Installation
MIS-3863
SHORT FILTER
BRACKET
(4) REGULAR SCREWS
LONG FILTER
BRACKET
LEFT HAND UNITRIGHT HAND UNIT
INSTALL FILTER BRACKET
FILL PLATE WITH (2) SCREWS
(ONLY FOR 2-3 TON UNITS)
LONG FILTER
BRACKET
(4) REGULAR SCREWS

Manual 2100-667
Page 7 of 19
Commercial Room Ventilator (CRV) No Hood
Installation
1. Insert CRV into opening in the wall mount unit
between the filter rack and the condenser section,
being careful not to tear the unit insulation. Fully
seat CRV assembly to rear of the cavity. Slide the
CRV toward the control panel so that it lines up
with the return air opening in the rear of the wall
mount unit (see Figure 5 on page 8).
2. Insert and lock in the 12-pin plug end of the wire
assembly into the front side of the unit’s control
panel (see Figure 5).
3. Replace the air filters if they were removed (airflow
direction is up).
4. The next step involves installing the unit’s filter
door and putting the mist eliminator filter into
place (see Figure 6 on page 8).
5. With the lower vent option door removed, locate
the control board. Then, make all the required
thermostat connections per the applicable
connection diagram found on pages 11 or 12, and
restore power to the unit.
6. Make any necessary changes required to
the potentiometers to achieve the minimum
continuous airflow and demand airflow desired (see
Figure 7 on page 10.
7. Then, replace the lower vent option door with the
four (4) screws provided as shown in Figure 6.
FIGURE 4
Extension Cable Installation
NOTE: Incorporated with the WCRVPS*P is one piece of 20˝ split tubing. The tubing will cover the wire assembly routed to
the actuator. The tubing and wires will be routed under the actuator assembly.
MIS-3864
F0R 5-TON SECURE
ORIENTATION FOR
RIGHT HAND UNITS
ORIENTATION FOR
LEFT HAND UNITS
WITH CABLE TIE
UNIT CONTROL PANEL.
CONNECTOR WILL PLUG IN TO THE FRONT SIDE OF THE
CONTROL USING THE TWO SCREWS. THE 12-PIN
PART #7950-009
12 PIN CONNECTOR FROM CRV STEP CONTROL
WILL PLUG INTO THE FRONT SIDE OF THE UNIT
CONTROL PANEL
FOR LEFT HAND MODELS, REMOVE SCREWS HOLDING
CRV STEP CONTROL BRACKET. ROUTE CONTROL
UNDER CENTER ACTUATOR SUPPORT BRACKET, AND
THEN TO LEFT SIDE OF DAMPERASSEMBLY, RE-SECURE
ROUTE THE 20" LONG EXTENSION
CABLE ACROSS THE TOP OF THE
DAMPERASSEMBLY
MIS-3864
FOR 5 TON, SECURE
WITH CABLE TIE
PART #7950-009
ORIENTATION FOR
LEFT HAND UNITS
ROUTE THE 20" LONG EXTENSION CABLE
ACROSS THE TOP OF THE DAMPER ASSEMBLY
ORIENTATION FOR
RIGHT HAND UNITS
12-PIN CONNECTOR FROM CRV STEP
CONTROL WILL PLUG INTO THE FRONT
SIDE OF THE UNIT CONTROL PANEL.
FOR LEFT HAND MODELS, REMOVE
SCREWS HOLDING CRV STEP CONTROL
BRACKET. ROUTE CONTROL UNDER
CENTER ACTUATOR SUPPORT BRACKET
AND THEN TO LEFT SIDE OF DAMPER
ASSEMBLY; RE-SECURE CONTROL
USING THE TWO SCREWS. THE 12-PIN
CONNECTOR WILL PLUG IN TO THE
FRONT SIDE OF THE UNIT CONTROL
PANEL.

Manual 2100-667
Page 8 of 19
MIS-3862
COIL
FILTER/FILTER RACK
TOP OF OUTDOOR
AFTER SLIDING THE VENT PACKAGE
INTO THE WALL MOUNT, SLIDE IT
TOWARD THE CONTROL PANEL SIDE
ALIGNING IT WITH THE RETURN AIR
OPENING IN THE REAR
CONTROL PANEL
(RH SHOWN)
THE WIRE HARNESS
(12-PIN PLUG END)
FROM THIS LOCATION
ON THE VENT PACKAGE
WILL PLUG INTO THE
FRONT SIDE OF THE
CONTROL PANEL
INSERT (4) SCREWS
TO HOLD DOOR IN
PLACE.
ALUMINUM 8 MESH
SCREEN MATERIAL
FILTER
MIS-3865
FIGURE 6
Vent Door Assembly
FIGURE 5
Damper Assembly Installation

Manual 2100-667
Page 9 of 19
CO2Control
For CO2-based control, add CO2sensor/controller
(Bard part #8403-067) to the wall and run additional
optional wires as shown in the wiring diagrams on
pages 11 and 12.
The CO2controller must also be reconfigured from the
standard default settings as shipped from the factory.
See page 13 for complete details.
Control System Notes
This ventilation package is set to meet the current
ASHRAE specifications for minimum occupied airflow
rates, with extended capability to meet demand
ventilation requirements. There are two different
provisions to optomize this control path. One is the
utilization of switch closures (occupancy and CO2
demand) and the other is the utilization of occupancy
(switch closure) and modulating CO2.
Two Switch Application
Energizing the A terminal in the low voltage connection
box during occupied conditions will allow the minimum
occupied airflow rate to be set to meet ASHRAE
requirements. This can be accomplished by adjusting
Potentiometer R1 on the CRV control board by aligning
the damper position per the charts included on pages
14-17 (see Figure 7 on page 10). The factory default
blade position for this condition is set to position 3.
Energizing Terminal 5 (A is still energized) in the low
voltage connection box will then drive the damper open
to the CFM rate as set by Potentiometer R2 on the
CRV control board (see Figure 7). Refer to the proper
chart on pages 14-17 for the airflow to damper position
correlation. The factory default blade position for this
condition is set to position 4.5.
Modulating CO2Control
Wire the R power wire of the CO2control to A of the
low voltage terminal block, then energize A based upon
occupancy.
Connect the brown/white wire that is landed on the
PARK terminal in the CRV control board to the OCC
terminal of the CRV control board.
Once things are powered up and the CO2control has
equalized, adjust Potentiometer R7 to the minimum
damper open position to yield the desired occupied
airflow rates. The CO2control will then take over in
modulating the damper position to maintain the proper
CO2rates.

Manual 2100-667
Page 10 of 19
FIGURE 7
CRV Control Board
R7 R3
SCHEME IS UTILIZED
R2
CONTROL SCHEM IS UTILIZED
NON-MODULATION CO2
OCCUPIED AIRFLOW WHEN
POT "R1" ADJUST MINIMUM
R1
POT "R2" ADJUST DEMAND
VENTILATION WHEN NON-
MODULATION CO2 CONTROL
POT "R7" ADJUST MINIMUM
OCCUPIED AIRFLOW. CAN ONLY
BE SET WHEN CO2 CONTROL
IS READING BELOW 700 PPM
OCC
"PARK TERMINAL" TO THE "OCC TERMINAL"
BROWN/WHITE
ON THE CRV CONTROL BOARD
WHEN UTILIZING MODULATING
CO2 CONTROL, THE BROWN/WHITE
WIRE NEEDS TO MOVE FROM THE
MIS-3868 A
CRV CONTROL BOARD

Manual 2100-667
Page 11 of 19
FIGURE 8
Required Control Connections for CRV with Air Conditioners
Thermostat W1/E AYO/D
LO/BY2Y1R GC W2
Bard #8403-060
Add-on demand
4
ventilation control
61012119 412-Pin
Vent Plug
23 5 7
CO2 OUT
Optional CO2 Controller
Bard Part #8403-067
6
5
4
3
2
1
TEMP-OUT
24VAC
W3/8 76532R
Unit Low
Voltage
Term. Strip
W2C GRT Y1 Y2 B/W1 L/1 DA 4
W1/E
SC SC SC
Completestat
Model #CS9B-THO or
Model #CS9BE-THO
W2
COM G
24V Y1 Y2 O/B L DA GND
Blue
Yellow
Orange
Red
6
1
Additional wire required for dehumidification models.
2Not needed below 15KW.
3
Factory installed jumper. Remove jumper and connect
to N.C fire alarm circuit if emergency shutdown required. 4
3
5 Relay Provided with Completestat
Demand ventilation control, which could include switched CO2 control, or secondary
motion activated switch. Would be negated with option 7 (CO2 with 0-10VDC modulating output)
5
WCRVPS*P PLUGS IN HERE
6
2
2
3
White
1
4-20 mA Modulating CO2 control for modulating ventilation control
MIS-3875 A

Manual 2100-667
Page 12 of 19
FIGURE 9
Required Control Connections for CRV with Heat Pumps
Thermostat W1/E AYO/D
LO/BY2Y1R GC W2
Bard #8403-060
Add-on demand
4
ventilation control
61012119 412-Pin
Vent Plug
23 5 7
CO2 OUT
Optional CO2 Controller
Bard Part #8403-067
6
5
4
3
2
1
TEMP-OUT
24VAC
W3/8 76532R
Unit Low
Voltage
Term. Strip
W2C GRT Y1 Y2 B/W1 L/1 DA 4
W1/E
SC SC SC
Completestat
Model #CS9B-THO or
Model #CS9BE-THO
W2
COM G
24V Y1 Y2 O/B L DA GND
Blue
Yellow
Orange
Red
1
Additional wire required for dehumidification models.
2Not needed below 15KW.
Factory installed jumper. Remove jumper and connect
3
to N.C fire alarm circuit if emergency shutdown required. 4Demand ventilation control, which could include switched CO2 control, or secondary
motion activated switch. Would be negated with option 7 (CO2 with 0-10VDC modulating output)
5Relay Provided with Completestat
5
WCRVPS*P PLUGS IN HERE
6
3
6
2
23
White
1
4-20 mA Modulating CO2 control for modulating ventilation control
MIS-3876 A

Manual 2100-667
Page 13 of 19
PRESS UP AND DOWN
ARROWS TO ENTER
CONFIGURATION MODE
USE ARROWS TO SELECT
SETTING. PUSH MIDDLE
BUTTON TO CHANGE.
CONTROLLER WILL
SHOW SET.
MIS-3763
4-20mA AN (ppm) Damper (1) Approc. Blade
Position (2)
4 700 MIN. OCC.
VENTILATION 0
5 750 .6
6 800 1.3
7 850 1.9
8 900 2.5
9 950 3.1
10 1000 3.8
11 1050 4.4
12 1100 5
13 1150 5.6
14 1200 6.3
15 1250 6.9
16 1300 7.5
17 1350 8.1
18 1400 8.8
19 1450 9.4
20 1500 FULLY OPEN 10
Settings Recommended Default
RON Not Used
ROF Not Used
DSP CCT
UNI US US
COL 700 0
COH 1500 2000
TOL Not Used
TOH Not Used
BAR See Instrution with Controller
For High Altitude Installations
CAL Used for Field Calibration
(1) Damper should be at the required minimum occupied ventilation rate when the
CO2control is at 700 ppm. Potentiometer R7 can be adjusted clockwise (CW) to
close it down, or counter clockwise (CCW) to open it tothe required setpoint.
(2) Blade as referenced tothe Blade Position Label.
JUMPERS MUST BE
POSITIONED AS SHOWN
FOR PROPER OPERATION
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
FIGURE 10
CO2Sensor Default and Final Settings
Bard Part #8403-067 CO2Controller

Manual 2100-667
Page 14 of 19
BLADE ADJUSTMENT FOR DESIRED
VENTILATOR AIR
The amount of ventilation air supplied by the
commercial room ventilator is dependant on four
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 appropriate graph below and on the
following pages to determine the blade setting
necessary to achieve the ventilation air required for
each operating mode.
Factory Default Settings
Potentiometer R1: 3
Potentiometer R2: 6
For more accurate adjustment, use a flowhood over
the intake opening to measure and adjust the airflow
operation.
Potentiometer R1 Adjusts the minimum constant
airflow during occupied conditions
Potentiometer R2 Adjusts the airflow on a contact
closure for demand ventilation
Energize occupied condition mode and adjust #1
Potentiometer to desired airflow.
Energize demand ventilation mode and adjust #2
Potentiometer to desired airflow.
Minimum damper position when using CO2control
damper should be at minimum occupied airflow 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 are required.
GRAPH 1
W18AA Part Flow Ventilation Delivery

Manual 2100-667
Page 15 of 19
GRAPH 2
W24AA Part Flow Ventilation Delivery
GRAPH 3
W30AA and W36AA Part Flow Ventilation Delivery
0
100
200
300
400
500
600
700
800
12345678910
Ventilation CFM
DAMPER POSITION
Supply and Return Grilles 0.20" Duct Static 0.40" Duct Static

Manual 2100-667
Page 16 of 19
GRAPH 4
W42AA and W48AA Part Flow Ventilation Delivery
GRAPH 5
W60AA Part Flow Ventilation Delivery

Manual 2100-667
Page 17 of 19
GRAPH 5
W72AA Part Flow Ventilation Delivery

Manual 2100-667
Page 18 of 19
FIGURE 11
Call for Ventilation With or Without Compressor Operation
COMMERCIAL ROOM VENTILATOR
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 occupied conditions, CRV opens to a
position as set by #1 Potentiometer (see Figure 11).
NOTE: These sequence descriptions do not apply if
CO2controller is used. The CRV will control
according to observed CO2levels in the
conditioned space. Refer to information on
page 13.
MIS-3866
OUTDOOR AIR
RETURN AIR
SUPPLY AIR
COOLING COIL
EXHAUST AIR
CONDENSER AIR
ELIMINATOR
AIR FILTER
MIST
CONDENSER COIL

Manual 2100-667
Page 19 of 19
FIGURE 12
Call for Compressor or Fan Only with Ventilation Off
SUPPLY AIR
AIR FILTER
COOLING COIL
CONDENSER AIR
OUTDOOR AIR
ELIMINATOR
MIST
CONDENSER COIL
100% RETURN AIR
DAMPER BLADE
MIS-3867