Changing Ventilation Cfm Rates In Manual Mode; Changing To Fully Modulating Mode; Control - Bard I30A1DA Installation Instructions Manual

5. Use a manual timer that the occupants turn to
energize the ERV for a specific number of hours.
6. Use a programmable mechanical timer to energize
the ERV and indoor blower during occupied periods
of the day.
NOTE: The ventilation package comes with a blower
interlock function, but is disabled when it is shipped
from the factory in case a thermostat with an occupancy
output or occupancy sensor is not utilized. In this
situation, "A" terminal must be tied to "G" terminal to
drive the ventilation package. If a thermostat or control
that drives occupancy output is utilized, the tape from
the orange wire located in the low voltage terminal box
will need to be removed and the orange wire connected
to the "G" terminal to activate this function. (See
Figures 13-19 on pages 24 to 30.)
CHANGING VENTILATION CFM RATES
IN MANUAL MODE
WARNING
• Hazard of electrical shock.
• Electrical shock can result in serious
injury or death.
• Disconnect the remote electric power
supply or supplies before servicing.
To adjust the airflow ventilation rate, first refer to
Figure 28A on page 52 to look up the "FLOW INDEX"
needed for the intake and exhaust blowers for the CFM
required. Then, perform the following steps:
1. Open front swinging doors of main unit (by popping
front door latches).
2. Throw main power disconnect to the "OFF"
position to eliminate risk of injury or death due to
electrical shock.
3. Remove five (5) screws holding front ERV door in
place (see Figure 30 on page 54).
4. Remove ERV control panel cover by removing four
(4) screws (see Figure 30).
5. Locate two 0-10Vdc motor control boards in
control panel (see Figure 31 on page 55).
6. On intake motor control board, observing
"GREEN STATUS LIGHT", turn manual adjust
potentiometer "CCW" to increase "FLOW INDEX"
or CW to reduce "FLOW INDEX" to match desired
setting.
Manual 2100-597G
Page 50 of 68
NOTE: After long pause, the green status light
will blink long-blinks for the "TEN COUNT" of the
"FLOW RATE INDEX", then immediately followed
by fast blinks which indicate the second digit. For
example, a Flow Index of 23 would be two long
blinks, followed by three fast blinks of the "GREEN
STATUS LIGHT".
7. On exhaust motor control board, observing
"GREEN STATUS LIGHT", turn manual adjust
potentiometer "CCW" to increase "FLOW INDEX"
or CW to reduce "FLOW INDEX" to match desired
setting.
NOTE: Same "GREEN STATUS LIGHT" blink as
Step #6.
CHANGING TO FULLY MODULATING
MODE
To operate the ERV in fully variable mode (only run at
required speed to maintain set-point CO
ERV needs to be configured to the following:
1. Open front swinging doors of main unit (by popping
front door latches).
2. Throw main power disconnect to the "OFF"
position to eliminate risk of injury or death due to
electrical shock.
3. Remove ERV control panel cover by removing four
(4) screws (see Figure 30 on page 54).
4. Locate two 0-10Vdc motor control boards in
control panel (see Figure 31 on page 55).
5. Pull jumper pins from "M" terminals and move to
"P" terminals (see Figure 31).
6. Connect "+" 0-10Vdc output from CO
Terminal #3 (along with pink wire) and connect "-"
to Terminal #4 (along with purple wire) of unit low
voltage terminal strip.
7. Follow the directions supplied with the CO
to configure the control appropriately.
levels), the
2
control to
2

control

2