Bard CRV-V5A Wall Mount Ventilation

Product Information: Full Flow Modulating Low Leakage Commercial Room

Ventilator

• Model : CRV-V5A
• Manufacturer : Bard Manufacturing Company, Inc.
• Website : www.bardhvac.com
• Manual : 2100-754A
• Date : 3-28-23
• Page : 1 of 28

Product Usage Instructions

General Information
The Full Flow Modulating Low Leakage Commercial Room Ventilator (CRV) is designed to be used with Bard Wall Mount Air Conditioner and Heat Pump Models W3SAC, W4SAC, W5SAC, W42AC, W48AC, W60AC, W72AC, W42HC, W48HC, W60HC, C36HY, C42HY, C48HY, and C60HY.

Unpacking (Field Installation Only)

1. Disconnect power to the unit.
2. Remove the side grilles.
3. Remove the blower door and control panel.
4. Remove the blank off plates from both sides.
5. Remove the exhaust blank off plate.
6. Remove the air filters and low voltage control panel cover.

Installation

1. Install the 910-2065 Control Board Assembly.
2. Install the vent.
3. Ensure that the control plug is centered in the plug access opening.
4. Connect the CRV power plug to the control panel plug.
5. Release the exhaust blade and latch.
6. Install the intake sealing frame and lower block off plates.
7. Install the mist filters.
8. Install the bug screen and gaskets.
9. Apply the ventilation air label.

Control Board Settings
Refer to Figure 17 for the CRV Control Board settings.

Thermostat Connections
Refer to the appropriate figure below based on your specific setup

• Single Stage Air Conditioners : Refer to Figure 19 (Programmable Thermostat) or Figure 22 (Non-Programmable Thermostat).
• 2-Stage Air Conditioners : Refer to Figure 20 (Programmable Thermostat) or Figure 23 (Non-Programmable Thermostat).
• Heat Pumps : Refer to Figure 21 (Programmable Thermostat) or Figure 24 (Non-Programmable Thermostat).

CO2 Sensor Settings
Refer to Figure 25 for the default and final settings of the CO2 Sensor (Bard Part #8403-096 CO2 Controller).

Lubrication Points
Refer to Figure 29 for the lubrication points of the CRV.

GENERAL INFORMATION

Commercial Room Ventilator (CRV) Model Nomenclature

General Commercial Room Ventilator Information
Commercial room ventilator use provides a way to bring in outdoor air into a structure. The damper assembly allows outdoor ventilation air to enter both sides of the wall mount unit, while exhausting room air out the front of the unit above the condenser coil area. A 24VAC damper motor with linkage operates both the exhaust blade and both intake blades. The indoor blower operates while ventilation occurs. A control board allows for various ventilation options.

The following benefits can be attributed to CRV use

• Air is drawn through the sides of the unit using the indoor blower and enters the indoor area through the supply opening.
• Pressurized room air enters the unit return opening and is exhausted through the front of the unit.
• Ventilation can be controlled as an on/off 24VAC signal or a 0-10VDC modulating signal to the CRV control board.

The CRV control board provides inputs for multiple blade positions for use with wall mount units with multiple indoor airflow amounts like the WSAC product. A pre-purge ventilation setting is also available with a 30/60/90 minute timer to allow ventilation to start per a schedule at a specified CFM amount. To use the pre-purge feature, scheduled ventilation would be started before occupants enter the room. A 0-10VDC input allows for modulating control of the ventilation amount. The 0-10VDC signal can be provided by a DDC building management system or a CO2 sensor with modulating control. If additional room pressurization is required, it may be necessary to block off part or all of the room exhaust.

The CRV system consists of the following key features and components

• Openings on both sides of the unit that allow outdoor air to enter the wall mount unit. A filter covers the opening to reduce debris and moisture entry into the unit. Once the air enters the unit, it is drawn through the filter located above the vent area and transferred into the building by the indoor blower.
• An opening in the front of the unit that allows pressurized indoor air to leave the building. A corrosion-resistant screen covers the opening.
• Three blades located inside the CRV assembly that control the amount of air entering and leaving the building.
• A fully modulating spring return damper motor with a control arm, connecting rods and blade linkage that operates the CRV blades.
• A solid-state control board that operates the damper motor.

Overall, this manual is designed to explain how to field install the CRV, how the CRV functions and discuss CRV setup procedures. If this manual is being supplied with a wall mount unit that already has a factory installed CRV, it may not be necessary to review the field installation portion of this manual.

Unpacking (Field Installation Only)
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 (check parts list below). 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.

Kit Components (Field Installation Only)
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.

Ventilator kit includes

• CRV-V5 ventilator
• 7003-084 mist filter (2)
• 7003-083 exhaust bug screen
• 1913-002-0808 8-1/2″ foam strip (2)
• 1913-002-0708 7-1/2″ foam strip (4)
• 539-405 intake sealing frame (2)
• 910-2065 control board assembly
• 543-223 lower block off plate (2)

• 10-16×1/2 screw (12)

• 8-18×3/8 pan head screw (4)

• 2100-754A installation instructions

Service
The low leakage ventilators/economizers use stainless steel intake blade seals. It is recommended that the side seals, ball joints, and blade hinges be lubricated with a graphite dry lubricant once a year or during filter changes (see Figure 29 on page 26).

INSTALLATION OF FIELD-INSTALLED CRV-V5

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.

WARNING
Exposed moving parts.
Disconnect electrical power before servicing.
Failure to do so could result in severe injury or amputation.

CAUTION
Cut hazard.
Wear gloves to avoid contact with sharp edges.
Failure to do so could result in personal injury.

1. Disconnect all power to unit (see Figure 1).

2. Remove both side grilles (see Figure 2).

3. Remove upper blower door and outer control panel (see Figure 3).

4. Remove blank off plates (both sides) and discard (see Figure 4).

5. Remove exhaust blank off plate through return or through side intake openings and discard (see Figure 5).

6. Remove both air filters and the low voltage inner control panel cover (see Figure 6). Remove left filter first then slide right filter to the left to remove.

7. Install the 910-2065 control board assembly on the left side of the control panel using four (4) #10 x 1/2 screws (provided) as shown in Figure 7.

   • Snap the four pin connector into the opening next to the low voltage box.
   • Plug the 12 pin male connector into the female plug in the low voltage box.

8. Before installing vent, remove CRV from packaging and verify there is no damage. Install the CRV as shown in Figure 8. CRV can be installed from either side.

   • Set CRV on the exhaust partition (see Figure 5 on page 5) and slide in until flush with the side of the wall mount.

9. When the CRV is fully installed, the control plug should be centered in the plug access opening on the front panel of the CRV as shown in Figure 9.

10. From the front, through the filter opening, plug the CRV power plug into the control panel plug (see Figure 10).
    IMPORTANT: Sharp edges–PPE required.

11. The CRV exhaust blade is fixed in the shipping position by the latch located on the bottom of the blade (see Figure 11). Access can be made through the return air opening or through the opening under the CRV. Turning the latch 1/4 turn will release the blade.

12. Make sure the blade seats correctly over the exhaust opening and that the latch is as shown in Figure 12.

13. Install the 539-405 intake sealing frame and the 543-223 lower block off plates (both sides) as shown in Figure 13. Install two (2) 1913-002-0708 7-1/2″ foam gaskets below the intake sealing frame (both sides).

14. Bend the two (2) sheet metal tabs in the condenser partition up to hold the bottom of the mist eliminator in place.
    Install 7003-084 mist filters on both sides (see Figure 14). Then re-install the side grilles removed earlier.

15. Remove the front lower (condenser) grille and bend the two (2) sheet metal tabs in the condenser partition up to hold the bottom of the bug screen in place. Install two (2) 1913-002-0808 8-1/2″ foam gaskets to ends of cabinet (see Figure 15). Install the 7003-083 exhaust bug screen. Re-install grille.

16. Restore power to unit.

    • Set the preferred amount of ventilation air by using the numbered label on the CRV (see Figure 16) and referring to Blade Adjustment for Desired Ventilator Air on page 10 and the airflow charts on pages 19, 20 and 21.
    • When blade settings are complete, disconnect power.
    • Install both filters, then re-install the inner control panel, outer control panel and upper blower door.
      Restore power to unit.

CO2 Control
For CO2-based control, add CO2 sensor/controller
(Bard part #8403-096) to the wall and run additional optional wires as shown in the wiring diagrams on pages 12-17.
The CO2 controller must also be reconfigured from the standard default settings as shipped from the factory. See page 18 for complete details.

Control System Notes
This ventilation package is capable of being set to meet the current ASHRAE specifications for minimum occupied airflow rates, with extended capability to meet demand ventilation requirements.

Two Switch Application
Energizing the A terminal in the low voltage connection box during occupied conditions will allow the prep urge and minimum occupied airflow rates to be set to meet ASHRAE requirements. This can be accomplished by adjusting the PP and OCC potentiometers on the CRV control board (see Figure 17) by aligning the damper position per the charts included on pages 19, 20 and 21.

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 on pages 19, 20 and 21 to determine the blade setting necessary to achieve the ventilation air required for each operating mode.
All potentiometers are set in the closed position from the factory.
Turning potentiometers counter clockwise will close the blade; clockwise will open the blade.

Adjusting Blade Settings
WAC, WHC and CH Units
Blade settings can be made without the thermostat connected.

1. With the unit powered up, jumper R to A. The OCC potentiometer on the CRV board can be set. Remove jumper.
2. Move the pre-purge jumper on the board to the 30 second setting, then jumper R to A and set the PP potentiometer.
3. Remove jumper from R to A, then move pre-purge jumper back to 0.
4. Remove the factory jumper on unit low voltage terminal strip from Y1 and Y2.
5. Jumper R to A and Y1 and set the Y1 potentiometer. Set blade to achieve 28% more airflow than indicated on graph for CH units or when using Balanced Climate mode on WAC or W**HC units.
6. Jumper R to A, Y1 and Y2. The Y2 potentiometer can now be set.

NOTE: In WAC and WHC units, the jumper must be removed from Y1 and Y2 to set this potentiometer. This setting will be activated when the factory jumper is installed and there is a call for cooling or anytime Y2 is energized.

*WSAC Units**
Blade settings can be made without the thermostat connected.

1. With the unit powered up, jumper R to A. The OCC potentiometer on the CRV board can be set.
2. Move the pre-purge jumper on the board to the 30 second setting, then jumper R to A and set the PP potentiometer.
3. Remove jumper from R to A, then move pre-purge jumper back to 0.
4. Jumper R to A and Y1 and set the Y1 potentiometer; this will be used for part load mode and Balanced Climate mode when the Y2 and Y3 jumper is removed. Set blade to achieve 28% more airflow than indicated on graph when using part

FIGURE 18
CRV Control Board Wiring

FIGURE 19
Programmable Thermostat Connections for CRV with Single Stage Air Conditioners

1. Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.
2. Wire not needed below 15KW.
3. Wire required for dehumidification models only.
4. Do not connect “A” from thermostat if optional CO2 controller is used
5. 10 VDC modulating C02 control signal for modulating ventilation 5 control (optional for ECON only – see vent instruction manuals)
6. Change model configuration from heat pump to heat/cool. Must be configured to programmable and fan set to be programmed fan for the “A” output to function during scheduled occupied periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For dehumidification, must be configured for “No Economizer” for YO/D to be active for humidity control.
7. Install jumper for 1 stage electric heat on units with more than 10KW
8. Do not add these wires if setting up for modulating control. See note 5.
9. Factory installed jumper. Remove jumper to activate Balanced Climate™ mode. 9 A 2-stage thermostat is recommended for Balanced Climate mode.Y1 Y2 jumper not present if economizer is factory installed. Units with economizers have balanced climate jumper in economizer, refer to economizer manual.

FIGURE 20
Programmable Thermostat Connections for CRV with 2-Stage Air Conditioners

1. Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.
2. Wire not needed below 15KW.
3. Wire required for dehumidification models only.
4. Do not connect “A” from thermostat if optional CO2 controller is used
5. 10 VDC modulating C02 control signal for modulating ventilation 5 control (optional for ECON only – see vent instruction manuals)
6. Change model configuration from heat pump to heat/cool. Must be configured to programmable and fan set to be programmed fan for the “A” output to function during scheduled occupied periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For dehumidification, must be configured for “No Economizer” for YO/D to be active for humidity control.
7. Install jumper for 1 stage electric heat on units with less than 15KW
8. Do not add these wires if setting up for modulating control. See note 5.
9. Factory installed jumper. Remove jumper to activate Balancec Climite™ mode A 3 stage thermostat is recommended for Balance Climate Mode.

FIGURE 21
Programmable Thermostat Connections for CRV with Heat Pumps

1. Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.

2. Wire not needed below 15KW.

3. Wire required for dehumidification models only.

4. Do not connect “A” from thermostat if optional CO2 controller is used 0-10 VDC modulating C02 control signal for modulating ventilation control (optional for ECON only – see vent instruction manuals)

5. Ensure model configuration is heat pump and not heat/cool. Must be configured to programmable and fan set to be programmed fan for the “A” output to function during scheduled occupied periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For dehumidification, must be configured for “No Economizer” for YO/D to be active for humidity control.

6. Do not add these wires if setting up for modulating control.

7. Factory installed jumper. Remove jumper to activate Balanced Climate TM Mode.

8. A 2-stage thermostat is recommended for balanced climate mode. Y1 Y2 jumper not present if economizer is factory installed. Units with economizers have balanced
   climate jumper in economizer, refer to economizer manual.

9. The jumper is factory removed in the unit and on jade for CHY models. Completestat not compatible with CHY models.

FIGURE 22
Non-Programmable Thermostat Connections for CRV with Single Stage Air Conditioners

1. Factory installed jumper. Remove jumper and connect 6 0 to N.C fire alarm circuit if emergency shutdown required.
2. A Wire not needed below 15KW.
3. 2B Install Jumper for 1 stage electric heat on units with more than 10KW.
4. Wire required for dehumidification models only.
5. For vent operation, add jumper if optional CO2 controller is not used. Vent will run while blower is energized.
6. For ECON & CRV-V an additional wire change is required See install Manual.
7. Do not add these wires if setting up for modulating control. See note 6.
8. -10 VDC Modulating CO2 control signal for modulating ventilation control (Optional for ECON Only) – See vent installation manual.
9. Jumper needs added.
10. Thermostat will not work with units equipped with economizers.
11. Factory installed jumper. Remove jumper to activate Balanced Climate™ Mode. A 2-stage thermostat is recommended for Balanced Climate mode.

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown on Figures 22, 23 and 24). The red/white wire on the blower interlock relay (located on the vent control plate) needs to be moved from the “common” terminal to the “normally closed” terminal. If this change is not made, the relay will latch on once the “A” signal is received and the blower will not turn off. Refer to page 11 to see the wiring diagram with this change called out.

FIGURE 23
Non-Programmable Thermostat Connections for CRV with 2-Stage Air Conditioners

1. Factory installed jumper. Remove jumper and connect 6 0 to N.C fire alarm circuit if emergency shutdown required.
2. A Wire not needed below 15KW.
3. B Install Jumper for 1 stage electric heat on units with more than 10KW.
4. Wire required for dehumidification models only.
5. For vent operation, add jumper if optional CO2 controller is not used. Vent will run while blower is energized.
6. For ECON & CRV-V an additional wire change is required See install Manual.
7. Do not add these wires if setting up for modulating control. See note 6.
8. 10 VDC Modulating CO2 control signal for modulating ventilation control (Optional for ECON Only) – See vent installation manual.
9. Jumper needs added.
10. Thermostat will not work with units equipped with economizers.
11. Factory installed jumper. Remove jumper to activate Balanced Climate™ Mode. A 3-stage thermostat is recommended for Balanced Climate mode.

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown on Figures 22, 23 and 24). The red/white wire on the blower interlock relay (located on the vent control plate) needs to be moved from the “common” terminal to the “normally closed” terminal. If this change is not made, the relay will latch on once the “A” signal is received and the blower will not turn off. Refer to page 11 to see the wiring diagram with this change called out.

FIGURE 24
Non-Programmable Thermostat Connections for CRV with Heat Pumps

1. Factory installed jumper. Remove jumper and connect to N.C fire alarm circuit if emergency shutdown required.
2. Wire not needed below 15KW.
3. Wire required for dehumidification models only.
4. For vent operation, add jumper if optional CO2 controller is not used. Vent will run while blower is energized.
5. For ECON & CRV-V, an additional wire change is required.
6. See install manual
7. Do not add these wires if setting up for modulating control. See note 6. 0-10 VDC Modulating CO2 control signal for modulating ventilation control (Optional for ECON Only) – See vent installation manual.
8. Jumper needs added.
9. Thermostat will not work with units equipped with economizers. T4 pro not compatible with C**HY models
10. Factory installed jumper. Remove jumper to activate Balanced Climate™ Mode.
11. A 2-stage thermostat is recommended for Balanced Climate mode. Y1 Y2 jumper not present if economizer is factory installed. Units with economizers have balanced climate jumper in economizer, refer to economizer manual.
12. The jumper is factory removed in the unit and on jade for C**HY models

IMPORTANT NOTE
An additional wire change is required if jumper 4 is used which connects “A” to “G” (shown on Figures 22, 23 and 24). The red/white wire on the blower interlock relay (located on the vent control plate) needs to be moved from the “common” terminal to the “normally closed” terminal. If this change is not made, the relay will latch on once the “A” signal is received and the blower will not turn off. Refer to page 11 to see the wiring diagram with this change called out.

FIGURE 25
CO2 Sensor Default and Final Settings Bard Part #8403-096 CO2 Controller

GRAPH 1
W3SAC CRV-V5 Ventilation Delivery

GRAPH 2
W42*C CRV-V5 Ventilation Delivery

GRAPH 3
W48*C and W4SAC CRV-V5 Ventilation Delivery

GRAPH 4
W60*C and W5SAC CRV-V5 Ventilation Delivery

GRAPH 5
W72AC CRV-V5 Ventilation Delivery

GRAPH 6
C36H and C42H CRV-V5 Ventilation Delivery

GRAPH 7
C48H and C60H CRV-V5 Ventilation Delivery

“V” Option CRV Sequence of Operation
The “V” Ventilation option includes a control board with blade positioning potentiometers along with an input for a 2-10V input signal (see Figure 26).

Adjustable potentiometers

• “PP” Potentiometer setting: This potentiometer can be used to adjust the blade setting for outdoor air intake during a pre-purge cycle. The pre-purge cycle time is based on the setting of the pre-purge timer.
• “OCC” Potentiometer setting : This potentiometer can be used to adjust the blade setting for outdoor air intake when the “A” terminal is energized on the low voltage terminal strip indicating occupancy.
• “ Y1” Potentiometer setting : This potentiometer can be used to adjust the blade setting for outdoor air intake when the “Y1” terminal is energized on the low voltage terminal strip indicating 1st stage cooling or Balanced Climate operation. When energized, it overrides the “OCC” potentiometer setting.
• “ Y2” Potentiometer setting: This potentiometer can be used to adjust the blade setting for outdoor air intake when the “Y2” terminal is energized on the low voltage terminal strip indicating 2nd stage cooling operation.
• When energized, it overrides the “OCC” and “Y1” potentiometer settings.

Pre-Purge Feature
Pre-purge is used to ventilate a specified CFM amount before occupants enter the room or structure. The control board has a built-in pre-purge timer that can be set to 30, 60 and 90 minute intervals by moving the jumper noted in Figure 17 on page 9. This timer will start when the jumper is installed and the A terminal is energized on the low voltage terminal strip. Blade adjustment can be made on the PP potentiometer. Once the timer has timed out, the board will default to the occupied setting and this blade position can be adjusted on the OCC potentiometer. If the timer is set to 0 (off—shipped position), the occupied setting is instantaneous and the pre-purge setting (PP) is no longer in the sequence.

Occupied Setting
Occupied is used to ventilate a specified CFM amount when occupants enter the room or structure. The control board will energize the occupied setting
after the pre-purge cycle, or if pre-purge is disabled immediately when the A terminal is energized on the low voltage strip. Blade adjustment can be made on the OCC potentiometer.

Y1 Setting
WAC, WHC and CH Units
Y1 is used to ventilate a specified CFM amount when Y1 cooling is energized. The control board will energize the Y1 setting when Y1 is energized on the low voltage

strip. Blade adjustment can be made on the Y1 potentiometer. This potentiometer setting overrides the OCC occupied setting. Y1 is only used in WAC and WHC units if balanced climate operation is used.

*WSAC Units**
Y1 is used to ventilate a specified CFM amount when Y1 or Y2 cooling is energized. If part load or Balanced Climate operation is used, the Y1 setting should
be set to a blade setting that will allow additional outdoor intake air. The control board will energize
the Y1 setting when Y1 or Y2 is energized on the low voltage strip. Blade adjustment can be made on the Y1 potentiometer. This potentiometer setting overrides the OCC occupied setting.

Y2 Setting
WAC, WHC and CH Units
Y2 is used to ventilate a specified CFM amount when Y2 cooling is energized. The control board will energize the Y2 setting when Y2 is energized on the low voltage strip. The blade setting for the Y2 potentiometer must be set to match the occupied setting (OCC potentiometer) in order to bring in the same amount of outdoor air when full load cooling occurs. Blade adjustment can be made on the Y2 potentiometer. This potentiometer setting overrides the OCC occupied and the Y1 setting.

*WSAC Units**
Y2 is used to ventilate a specified CFM amount when Y3 cooling is energized. The control board will energize the Y2 setting when Y3 is energized on the low voltage strip. The blade setting for the Y2 potentiometer must be set to match the occupied setting (OCC potentiometer) in order to bring in the same amount of outdoor air when non-Balanced Climate cooling occurs. Blade adjustment can be made on the Y2 potentiometer. This potentiometer setting overrides the OCC occupied and the Y1 setting.

2-10V Operation
A CO2 sensor or other device sending a 2-10V signal can be used to control the damper motor. Two control methods are available to control the damper motor

• Method 1 : The control board will accept a 2- 10VDC signal with a resistive load greater than 5000 ohms. Bard CO2 sensor part #8403-096 can be used when the 2-10V output is connected to terminal 4 on the unit low voltage terminal strip. The occupied OCC potentiometer setting must be set to the off position for total modulation. The OCC potentiometer can be used to maintain a minimum blade position when A is energized.
• Method 2 : The damper motor will accept a 2- 10VDC signal with a resistive load less than 5000 ohms. This method involves bypassing the control board and powering the motor directly from the device providing the 2-10VDC modulating signal. The gray wire from pin 4 on the 12 pin connector (2-10V IN on control board) must be spliced with the white wire ran to the damper motor (2-10V OUT on control board).

During 2-10VDC operation with A energized and pre-purge timed operation active, DC voltage signaling occupancy from a source such as a CO2 sensor will increase ventilation amounts as needed.

TABLE 1
WAC and WHC Unit Operation with V (Variable CRV) Ventilation Option

BC and B Climate − Balanced Climate

1. Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used.
2. Y1 and Y2 jumper must be removed on low voltage terminal block connections and 2 stage thermostat must be utilized.
3. Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed during dehumidification operation.

TABLE 2
W*SAC Unit Operation with V (Variable CRV) Ventilation Option

BC and B Climate − Balanced Climate

1. Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used.
2. Y2 and Y3 jumper must be removed on low voltage terminal block connections and 3 stage thermostat must be utilized.
3. Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed during dehumidification operation.

TABLE 3
C**HY Unit Operation with V (Variable CRV) Ventilation Option

FIGURE 27
Call for Ventilation With or Without Compressor Operation

FIGURE 28
Call for Compressor or Fan Only with Ventilation Off

FIGURE 29 Lubrication Points

Documents / Resources

| Bard CRV-V5A Wall Mount Ventilation [pdf] Instruction Manual
CRV-V5A, W3SAC, CRV-V5A Wall Mount Ventilation, Wall Mount Ventilation, Mount Ventilation, Ventilation, W4SAC, W5SAC, W42AC, W48AC, 60AC, W72AC, W42HC, 48HC, 60HC, C36HY, 42HY, C48HY, C60HY
---|---
| Bard CRV-V5A Wall Mount Ventilation [pdf] Instruction Manual
CRV-V5A Wall Mount Ventilation, CRV-V5A, Wall Mount Ventilation, Mount Ventilation, Ventilation

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