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INSTALLATION INSTRUCTIONS
COMMERCIAL ROOM VENTILATORS
WITH EXHAUST
MODELS
CRVS-3
CRVP-3
CRVP-3L
For Use with Bard 1-1/2 through 3 Ton
Wall Mount Air Conditioners
and Heat Pumps
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
Manual : 2100-448E
Supersedes: 2100-448D
File: Volume III Tab 19
Date: 03-09-10
Manual 2100-448E
Page 1 of 13
Page 2
CONTENTS
General
General Information........................................... 3
Unpacking.......................................................... 3
Description......................................................... 3
Installation
Basic Installation.............................................4-8
Blade Adjustment for Desired Ventilation Air..... 9
Commercial Room Ventilator –
W**A, W**H & W**L Series.............................. 12
Figures
Figure 1 Removal of Exterior Panels ............... 4
Figure 2 Removal of Exhaust Cover Plate ....... 5
Figure 3 Re-Routing Wires Left Hand Units..... 6
Figure 4 Inserting Ventilator Into Unit............... 7
Figure 5 CRV Wiring Diagram.......................... 9
Figure 6 Call for Blower Operation................. 12
Figure 7 Call for Cooling Operation................ 13
Tables
Table 1 ........................................................... 4
Graphs
S26H1 & S31H1 High Speed .......................... 10
S26H1 & S31H1 Low Speed ........................... 10
W30A/H/L & W36A/H/L High Speed................ 11
W30A/H/L & W36A/H/L Low Speed................. 11
BARD MANUFACTURING COMPANY, INC.
Manual 2100-448E
Page 2 of 13
BRYAN, OHIO USA 43506
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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 CRVS-3, CRVP-3 and CRVP-3L ventilators are
designed to be used with Bard 1½ through 3 ton wall
mount series heat pumps and air conditioners. 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.
Manual 2100-448E
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INSTALLATION
BASIC INSTALLATION
1. Unpack the ventilator assembly which includes the
integral ventilator with attached electrical harness
and miscellaneous hardware.
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.
REMOVAL OF EXTERIOR PANELS
FIGURE 1
TABLE 1
HTIWESUROF
LEDOM
H03W
SVRC3PVRC3-
L3-PVRC
2. Remove and save the existing exterior blower
access and service access panels on the Bard wall
mount unit. (See Figure 1.)
A03W
A63W
H63W
H62S
H13S
STINUGNIWOLLOF
L03W
L63W
Manual 2100-448E
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Page 5
3. Remove and save existing unit return air filter and
left side filter support bracket by removing two (2)
screws from front side of unit. Remove and save
top four (4) screws from grille. (See Figure 2.)
REMOVAL OF EXHAUST COVER PLATE
4. Remove and discard the exhaust cover plate.
FIGURE 2
Manual 2100-448E
Page 5 of 13
Page 6
5. For Installation of Left Hand Units Only – Remove
strain relief in right side of CRV. Unclip the right
side wire tie holding the wire harness. Reroute
wires to left side of CRV. Reinstall wire tie in left
side hole. Route wires through left side and
reinstall strain relief. (See Figure 3.)
REROUTING WIRES FOR LEFT HAND UNIT INSTALLATION
6. 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 4.)
FIGURE 3
Manual 2100-448E
Page 6 of 13
Page 7
IMPORTANT: Position front lip of ventilator
under front grille and on top of condenser
partition. (See Figure 4 inset.) This is important to
ensure proper drainage of any water entering
damper assembly.
INSERTING VENTILATOR INTO THE UNIT
7. Open control panel to gain access to unit low
voltage terminal block.
8. Route electrical harness leads through the 7/8"
bushing in control panel (Figure 4) into low voltage
box.
FIGURE 4
FIGURE 4 INSET
SIDE SECTION
Manual 2100-448E
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Page 8
9. Connect leads with fork terminal to corresponding
points on unit terminal strip. (See Manual 2100507 for air conditioner connection diagrams; see
Manual 2100-516 for heat pump connection
diagrams.)
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. 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,
or to the blade stops on the CRVP. 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.
G. This completes ventilator checkout.
14. Adjust damper blade for required ventilation
airflow. (See next section.)
15. Replace mist eliminator. Be sure it is installed with
the drain holes to the bottom.
16. 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.
17. Replace service access panel.
18. Ventilator is now ready for operation.
Manual 2100-448E
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Page 9
FIGURE 5
CRV POSITION ADJUSTMENT
NOTE: POSITION ADJUSTMENT
THUMBWHEEL IS LOCATED
ON BACK OF MOTOR ABOVE
THE WIRING TERMINALS
CLASSROOOM VENTILATOR MOTOR
ADJUST FULL OPEN
POSITION WITH THUMBWHEEL
ROTATE UP TO OPEN
DOWN TO CLOSE
BLADE ADJUSTMENT FOR DESIRED
VENTILATOR AIR
The 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.
POSITION
ADJUSTMENT
THUMBWHEEL
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-3, adjust blade to desired
blade position. On the CRVP-3 and CRVP-3L, move
the blade stops on the sides of the CRVP to the desired
blade position - making sure the stops are parallel side
to side.
ADJUSTMENT
THUMBWHEEL
BACK OF
ACTUATOR
MOTOR
MIS-2188
Manual 2100-448E
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900
800
700
600
S26H & S31H HIGH SPEED TOTAL AND VENTILATION AIRFLOW
500
400
Airflow (cfm)
300
200
100
0
900
800
Total Air 0 ESP
Total Air .15 ESP
Vent Air 0 ESP
Vent Air .15 ESP
ABCDEF
Vent Position
S26H & S31H LOW SPEED TOTAL AND VENTILATION AIRFLOW
700
600
500
400
Airflow (cfm)
300
200
100
0
ABCDEF
Manual 2100-448E
Page 10 of 13
Total Air 0 ESP
Total Air .15 ESP
Vent Air 0 ESP
Vent Air .15 ESP
Vent Position
Page 11
1200
1100
1000
900
800
700
600
Airflow (cfm)
500
400
300
200
100
W30A/H/L & W36A/H/L HIGH SPEED TOTAL AND VENTILATION AIRFLOW
Total Air 0 ESP
Total Air .15 ESP
Total Air .3 ESP
Vent Air 0 ESP
Vent Air .15 ESP
Vent Air .3 ESP
0
1000
900
800
700
600
500
Airflow (cfm)
400
ABCDEF
Vent Position
W30A/H/L & W36A/H/L LOW SPEED TOTAL AND VENTILATION AIRFLOW
Total Air 0 ESP
Total Air .15 ESP
Total Air .3 ESP
Vent Air 0 ESP
Vent Air .15 ESP
Vent Air .3 ESP
300
200
100
0
ABCDEF
Vent Position
Manual 2100-448E
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COMMERCIAL ROOM VENTILATOR –
W**A, W**H AND W**L 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 75 percent of outside air.
CALL FOR BLOWER OPERATION
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.
FIGURE 6
Manual 2100-448E
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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.
CALL FOR COOLING OPERATION
FIGURE 7
Manual 2100-448E
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