Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Bard CRVS-3A
Summary of Contents for Bard CRVS-3A
- Page 1 INSTALLATION INSTRUCTIONS Commercial Room Ventilator with Exhaust Model: CRVS-3A For Use with Bard Heat Pump Models T24H, T30H and T30S Bard Manufacturing Company, Inc. Manual: 2100-759 Bryan, Ohio 43506 Supersedes: NEW Date: 12-8-21 www.bardhvac.com Page 1 of 16...
-
Page 2: Table Of Contents
CONTENTS General Figures General Information ..........3 Figure 1 Removal of Exterior Panels..... 4 Unpacking ............3 Figure 2 Removal of Exhaust Cover Plate ....5 Description ............3 Figure 3 Install Ventilator ........6 Models ..............3 Figure 4 8403-096 CO Sensor Set Up .... -
Page 3: General
Description Sharp metallic edges. Take care and wear appropriate protective The CRVS-3A ventilator is designed to be used with Bard heat pump models T24H, T30H and T30S. It is devices to avoid accidental contact with an electromechanical vent system designed to provide sharp edges. -
Page 4: Installation
T30S1D WARNING T30H1D 2. Remove and save the existing exterior blower access and service access panels on the Bard wall Open and lock disconnect switch before installing this accessory to prevent injury or mount unit (see Figure 1). death due to electrical shock or contact with moving parts. -
Page 5: Figure 2 Removal Of Exhaust Cover Plate
3. Remove and save existing unit return air filter and 4. Remove and discard the exhaust cover plate. left side filter support bracket by removing two (2) screws from front side of unit (see Figure 2). Remove and save top four (4) screws from grille. FIGURE 2 Removal of Exhaust Cover Plate Manual... -
Page 6: Figure 3 Install Ventilator
5. Install ventilator into unit (see Figure 3). 5. Open control panel to gain access to unit low voltage terminal block. IMPORTANT: Position front lip of ventilator on top of front grille and condenser partition (see Figure 3 6. Route electrical harness leads through the 7/8" inset). -
Page 7: Co Control
For CO -based control, add a CO sensor/controller terminal strip: (Bard P/N 8403-096) to the wall and run additional • Brown/White wire to the "01" terminal optional wires as shown in Figure 5 on page 9. •... -
Page 8: Figure 4 8403-096 Co Sensor Set Up
FIGURE 4 8403-096 CO Sensor Set Up 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 DIP SWITCH MUST BE IN "ON" POSITION #5 TO CHANGE ANY SETTINGS WITH THE SIDE BUTTONS. -
Page 9: Figure 5 Crv Control Board Wiring
FIGURE 5 CRV Control Board Wiring *A - OPTIONAL ON/OFF CO2 CONTROL *B - OPTIONAL MODULATING CO2 CONTROL *C - SINGLE-STAGE UNIT *D - OPTIONAL FIELD JUMPER FOR CRV-CONTROL BOARD CONSTANT VENTILATION WHEN INDOOR FAN IS ON REQUIRED FIELD WIRING FOR OPTIONAL CO2 CONTROL Damper Motor WHITE... -
Page 10: Blade Adjustment For Desired Ventilation Air
Blade Adjustment for Desired Ventilator Air The amount of ventilation air supplied by the commercial room ventilator is dependent on four (4) factors: 1. Return air duct static pressure drop. 2. Supply air duct static pressure drop. 3. Indoor blower motor speed. 4. -
Page 11: Figure 6 Crv Control Board
FIGURE 6 CRV Control Board POT "PP" PRE-PURGE SET FOR PREOCCUPANCY POT "OCC" OCCUPIED SETTING TURN OFF FOR C02 FULL MODULATION POT "Y1" SETTING FOR STAGE ONE COOLING Y1 WILL OVERRIDE OCC SETTING FOR 2ND STAGE COOLING OR BLADE POSITION WHEN Y2 IS ENERGIZED PRE-PURGE TIMER... -
Page 12: V" Option Crv Sequence Of Operation
(PP) is no 2-10VDC signal with a resistive load greater than longer in the sequence. 5000 ohms. Bard CO sensor 8403-096 can be used when the 2-10V output is connected to the Occupied Setting... - Page 13 ran to the damper motor (OUT on control board). The other end of the gray wire should be connected to the CO sensor as stated in Method 1. During 2-10VDC operation with "01" energized and pre-purge timed operation active, DC voltage signaling occupancy from a source such as a CO sensor will increase ventilation amounts as needed.
-
Page 14: Graph 1 T30* High Speed Total And Vent Airflow
GRAPH 1 T30* High Speed Total and Ventilation Airflow 1300 1200 1100 1000 Total Air 0 ESP Total Air .2 ESP Total Air .4 ESP Vent Air 0 ESP Vent Air .2 ESP Vent Air .4 ESP Vent Position GRAPH 2 T24H High Speed Total and Ventilation Airflow/T30* Low Speed Total and Ventilation Airflow Total Air 0 ESP Total Air .2 ESP... -
Page 15: Compressor Operation
FIGURE 8 Call for Ventilation with or without Compressor Operation Evaporator Coil Supply Air Return Air Outside Air DAMPER BLADE EXHAUST AIR Condenser Air Direction Condenser Coil MIS-347A Manual 2100-759 Page 15 of 16... -
Page 16: With Ventilation Off
FIGURE 9 Call for Compressor or Fan Only with Ventilation Off Evaporator Coil Supply Air Return Air DAMPER BLADE Condenser Air Direction Condenser Coil MIS-348A Manual 2100-759 Page 16 of 16...