Bard CRVMP-5 Installation Instructions Manual

Page 1
COMMERCIAL ROOM VENTILATORS
WITH EXHAUST
MODEL
CRVMP-5
For Use with Bard 3 through 5 Ton
WA*S Series Wall Mount Air Conditioners
Bard Manufacturing Company, Inc. Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
Manual : 2100-457D Supersedes: 2100-457C File: Volume III Tab 19 Date: 01-24-14
Manual 2100-457D Page 1 of 16
Page 2
CONTENTS
General
General Information Unpacking Description
Models .................................................................3
Installation
Basic Installation Blade Adjustment for Desired Ventilator Air Adding Optional CO Commercial Room Ventilator Sequence
.................................................................3
................................................................3
..................................................3
....................................................4-8
............10
Control Sensor ......................13
2
.........15 & 16
Figures
Figure 1 Removal of Exterior Panels ......................4
Figure 2
Figure 3 Install Ventilator ........................................6
Figure 4 Step Control Installation ...........................8
Figure 5 Damper Control Board .............................9
Figure 6 CO2 Sensor Set-Up (8403-056) .............14
Figure 7 Call for Blower Operation .......................15
Figure 8 Call for Cooling Operation ......................16
Tables
Table 1 .................................................................4
Graphs
WA3S Ventilation Airow WA4S Ventilation Airow WA5S Ventilation Airow
Remove Air Filter & Exhaust Cover Plate
.........................................11
.........................................11
.........................................12
.....5
BARD MANUFACTURING COMPANY, INC.
Manual 2100-457D Page 2 of 16
BRYAN, OHIO USA 43506
Page 3
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, step control assembly, 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 identication 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 CRVMP-5 ventilator is designed to be used with Bard 3 through 5 ton wall mount series step capacity air conditioners. It is an electromechanical vent system designed to provide fresh air to meet indoor air quality standards. It automatically adjusts to the mode of operation to maintain consistent fresh air intake levels. Examples are blower only, stage 1 cooling and stage 2
cooling, which are all set for different total airows.
MODELS
When installed in the above-listed models, the CRVMP-5 provides built in exhaust provisions. the damper blade opens to bring fresh air in, the damper
also opens an exhaust relief. The exhaust air will ow
into the condenser section of the unit. The condenser fan will help draw exhaust air out.
When
Manual 2100-457D Page 3 of 16
Page 4
INSTALLATION
BASIC INSTALLATION
1. Unpack the ventilator assembly which includes the integral ventilator with attached electrical harness, step control assembly 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
2. Remove and save the existing exterior blower
FIGURE 1
TABLE 1
Model
CRVMP-5
access and service access panels on the Bard wall mount unit. (See Figure 1.)
FOR USE WITH
FOLLOWING UNITS
WA3S WA4S WA5S
Manual 2100-457D Page 4 of 16
Page 5
3. Remove and save existing unit air lter and screws
from front center grille. (See Figure 2.)
REMOVE AIR FILTER AND EXHAUST COVER PLATE
4. Remove and discard the exhaust cover plate.
FIGURE 2
Manual 2100-457D Page 5 of 16
Page 6
5. Install ventilator sheet metal assembly by inserting the ventilator into the unit to the far left side
clearing the right lter 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 3.)
IMPORTANT: Position front lip of ventilator on top of
front grille and condenser partition. (See Figure 3 inset.) This is important to ensure proper drainage of any water entering damper assembly.
FIGURE 3
INSTALL VENTILATOR
6. Open control panel to gain access to unit low voltage terminal block.
7. Route electrical harness leads through the 7/8" bushing in control panel (Figure 3) into low voltage box.
FIGURE 3 INSET
SIDE SECTION
Manual 2100-457D Page 6 of 16
Page 7
8. Connect “orange lead” with the fork terminal to either the “G” terminal of the low voltage strip (will ventilate anytime there is a call for the blower), or the “F” terminal (can be used as a junction point for on-demand ventilation with a capable thermostat or occupancy sensor).
9. The pink, purple and black wires will pass through bushing on opposite side of low voltage box where they entered, and will run up the wire loom to the step-control assembly for connection installed in Step #10, Figure 4 following the wiring diagram (enclosed in Literature Assembly or on ventilator).
10. Locate the step control assembly packaged with the assembly. This assembly will install in the upper left-hand corner of the control panel by aligning the plastic standoffs with pre-punched holes in the control panel. See Figure 4.
11. Route the wires from the step control assembly down the control panel through the wire looms, and route them into the low voltage box through the bushing. See Figure 4. Make connections following the wiring diagram (enclosed in Literature Assembly or on ventilator).
12. Replace left lter support, lter and four (4) screws
in condenser grille.
13. Reinstall the blower access panel at top of unit and secure with sheet metal screws.
14. Ventilator checkout – (Note: It may be more
efcient to disconnect the thermostat from the low voltage terminal strip and use a set of jumper wires to perform these steps.)
A. Resupply power to the unit. B.
Energize the evaporator blower by switching
thermostat to the manual fan position with heat/cool in OFF position. (Jumper “R” to “G”)
C. Ventilator should open to the position set by
“R1” potentiometer on step control board. (See Figure 5.)
D. Now energize Stage #1 cooling/heating by
switching the thermostat to the corresponding mode and setting the temperature offset slightly beyond the actual room temperature. (Jumper
“R” to “G” and “Y1”)
E. Ventilator should now open to the position set
by “R2” potentiometer on step control board. (See Figure 5.)
Manual 2100-457D Page 7 of 16
Page 8
F. Now energize the Stage #2 cooling/heating by
910-1622 STEP CONTROL ASSEMBLY. INSTALLS HERE BY SEATING PLASTIC STAND-OFFS INTO PROVIDED HOLES
ROUTE WIRES THROUGH EXISTING WIRE LOOMS
ROUTE WIRES THROUGH BUSHING INTO LOW VOLTAGE BOX
WIRES FROM DAMPER MOTOR
MIS-2116
increasing the thermostat setting to a greater offset than the actual room temperature.
(Jumper “R” to “G”, “Y1” and “Y2”)
G. Ventilator should now open to the position set
by “R3” potentiometer on step control board. (See Figure 5.)
H. Now turn the heat/cool selector to OFF, and set
the fan switch back to AUTO. The damper blade should close. (Remove all jumper
connections.)
I. This completes the ventilator checkout.
FIGURE 4
STEP CONTROL INSTALLATION
15. Adjust damper blade for required ventilation. (See next section.)
16. Replace mist eliminator lter. Be sure that it is
installed with the drain holes to the bottom.
17. 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.
18. Replace service access panel.
19. Close control panel cover.
20. Ventilator is now ready for operation.
Manual 2100-457D Page 8 of 16
Page 9
FIGURE 5
MIS-2117 A
"R2" ADJUSTMENT POTENTIOMETER FOR "STAGE #1" HEATING OR COOLING DAMPER POSITION. ("G" AND "Y1" CONTROL SIGNALS)
FOR "STAGE #2" HEATING OR COOLING DAMPER POSITION. ("G", "Y1", AND "Y2" CONTROL SIGNALS)
"R3" ADJUSTMENT POTENTIOMETER"R1" ADJUSTMENT POTENTIOMETER FOR "BLOWER ONLY" DAMPER POSITION. ("G" SIGNAL ONLY)
"R7" ADJUSTMENT POTENTIOMETER FOR APPLICATIONS WITH CO2 SENSORS. SEE "ADDING OPTIONAL CO2 CONTROL SENSOR" IN THIS MANUAL.
SETTING 3-POSITION CRV DAMPER CONTROL BOARD
(Utilize the charts for your specic model on the following pages)
Manual 2100-457D Page 9 of 16
Page 10
BLADE ADJUSTMENT FOR DESIRED VENTILA TOR AIR
The amount of ventilation air supplied by the
commercial room ventilator is dependent on ve (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 for each mode of operation.
5. Tightness or looseness of building envelope.
You will have to set the damper position for each mode of operation using the set-point potentiometers on the Damper Position Step Control Board. See Figure 5.
Refer to the graphs on the following pages to determine the necessary blade setting to achieve the ventilation air required based upon blower only, Stage #1 and Stage #2 modes of operation. These charts are model
specic, so you will have to match the chart to the specic model you are working with.
1. Set the damper position for blower only operation.
A. Energize the evaporator blower by switching thermostat to the manual fan position with heat/cool in OFF position (or Jumper “R” to “G” with thermostat disconnected at unit).
B. Locate potentiometer “R1” on the Damper Position Step Control Board. See Figure 5.
C. Using a small screwdriver, adjust potentiometer until damper position aligns with numerical location on the label interior of the sheet metal damper assembly.
2. Set the damper position for Stage #1 cooling/ heating operation.
A. Energize the evaporator blower and compressor by switching thermostat to the heat or cool mode, and setting it to a minimal offset to the room temperature to engage the mode of operation desired (or Jumper “R” to “G”
and “Y1” with thermostat disconnected at unit).
B. Locate potentiometer “R2” on the Damper Position Step Control Board. See Figure 5.
C. Using a small screwdriver, adjust potentiometer until damper position aligns with numerical location on the label interior of the sheet metal damper assembly. (Make sure there is not a call on “Y2” or “W2”.)
3. Set the damper position for Stage #2 cooling/ heating operation.
A. Energize the evaporator blower and compressor by switching thermostat to the heat or cool mode and set a large temperature offset to the room temperature to engage the mode of operation desired (or Jumper “R” to “G”,
“Y1” and “Y2” with thermostat disconnected
at unit).
B. Locate potentiometer “R3” on the Damper Position Step Control Board. See Figure 5.
C. Using a small screwdriver, adjust potentiometer until damper position aligns with numerical location on the label interior of the sheet metal damper assembly per the chart.
Manual 2100-457D Page 10 of 16
Page 11
0
100
200
300
400
500
600
700
800
0
2.557.51012.51517.52022.52527.5
30
Ventilation Airflow (CFM)
Vent Position
WA3S Ventilat ion Airflow
Stage #2 Operation
Blower Only & Stage #1 Operation
0
100
200
300
400
500
600
700
800
900
1000
0
2.557.51012.51517.52022.52527.5
30
Ventilation Airflow (CFM)
Vent Position
WA4S Ventilat ion Airflow
Stage #2 Operation
Stage #1 Operation
Blower Only
Manual 2100-457D Page 11 of 16
Page 12
0
100
200
300
400
500
600
700
800
900
1000
0
2.557.51012.51517.52022.52527.5
30
Ventilation Airflow (CFM)
Vent Posit ion
WA 5S V entilat ion Airflow
Stage #2 Operation
Stage #1 Operation
Blower Only
Manual 2100-457D Page 12 of 16
Page 13
ADDING OPTIONAL CO2 CONTROL SENSOR
Adding an optional Bard Part #8403-067 to this control will maximize the capabilities of this vent by only supplying fresh air intake to maintain CO2 levels. This
has multiple benets.
• Minimizes ventilation load on structure as it only brings in what is required to maintain CO2 levels lowering reconditioning requirements (not having to heat/cool as much outside air).
• Will self-adjust for various occupancy levels so that you are not bringing in fresh air beyond need. For example, if a room is designed for a maximum occupancy of 40 persons (the standard ventilation control would have to be set for that occupancy), but the room typically only contains 25 persons. This control will self-adjust the amount of fresh air intake from 600 to 375 CFM automatically (based upon 15 CFM per person standard rate to ASHRAE standards).
BASIC INSTALLATION
1. Make sure power is turned off to the unit
2. Follow steps beginning on page 2 for installation for standard control and vent assembly, then proceed with the following steps.
3. Run (4) wire thermostat wire from the unit to the desired CO2 sensor location.
4. Follow Figure 6 to congure the CO
sensor for
2
proper operation.
5. Connect the thermostat wiring from the CO2 sensor to step control assembly following the wiring diagram (enclosed in Literature Assembly or on ventilator).
6. Connect the orange wire from the “A” terminal of the units low voltage connection strip to the “OCC” terminal on the step control board.
7. To check operation, restore power to the unit.
8. Make sure that thermostatic control is in “occupied” mode of operation calling for ventilation.
9. Have someone stand in front of the CO2 sensor and breathe on it. The display should show an increase in CO2 ppm and the damper blade in the ventilation package should increase (may be good to have a helper - one to breathe on control and one to observe damper).
Manual 2100-457D Page 13 of 16
Page 14
FIGURE 6
17
12
FULLY OPEN150020
16145019
15140018
14135017
12130016
11125015
10120014
9115013
81100
MIS-3009 A
4-20mA AN (ppm) Damper (1)
Approc. Blade
Position (2) 4 700 FULLY CLOSED 0 5 750 1
6 800 2 7 850 3 8 900 4 9 950 5
10 1000 6 11 1050 7
Settings Recommended Default
RON Not Used ROF Not Used DSP C CT
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 fully closed at 700 ppm, if not Potentiometer R7 can be adjusted clockwise (CW) to close it. If it is fully closed at 700 ppm or lower no adjustments required. (2) Blade as referenced to the Blade Position Label.
PRESS UP AND DOWN ARROWS TO ENTER CONFIGURATION MODE USE ARROWS TO SELECT SETTING. PUSH MIDDLE BUTTON TO CHANGE. CONTROLLER WILL SHOW SET.
FOR PROPER OPERATION
POSITIONED AS SHOWN
JUMPERS MUST BE
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
8403-067 CO2 SENSOR SET UP
Manual 2100-457D Page 14 of 16
Page 15
COMMERCIAL ROOM VENTILATOR – WA*S SERIES
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.
CALL FOR BLOWER OPERATION
Actuator motor – 24 volt, power open, spring return
with built in torque limiting switch.
Provides up to 75 percent of outside air.
COMMERCIAL ROOM VENTILATOR SEQUENCE OF OPERATION
On a call for blower operation, CRV opens to a position as set by Step Control Position Assembly. See Figure 7.
FIGURE 7
Manual 2100-457D Page 15 of 16
Page 16
A call for cooling cycles the compressor, and dampers remain in the ventilation mode. On loss of blower operation, CRV closes fully. See Figure 8.
CALL FOR COOLING OPERATION
FIGURE 8
Manual 2100-457D Page 16 of 16
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