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Basic Installation
(Field 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.
For Use with the
Model
Following Units
W30A*-A, -B
ERVF-A3
W36A*-A, -B
CHERV-A3
--
W30A*-C
ERVF-C3
W36A*-C
CHERV-C3
--
CAUTION
!
Be sure the correct model and voltage energy
recovery ventilator is used with the correct air
conditioner or heat pump to ensure correct
voltage compatibility.
2. Remove the existing exterior blower access, filter
access and vent access panels on the Bard wall
mount unit. Save the blower access and filter
access panels and discard vent option access
panel (see Figure 1 on page 6).
3. Remove and save existing unit return air filter and
left side filter support bracket by removing two
screws from left side of unit. Remove and save top
four screws from front grille (see Figure 2 on page
7).
4. Remove and discard the exhaust cover plate (see
Figure 2).
Electrical
S26H*-A, -B
230/208
S30H*-A, -B
1 or 3
W30H*-A, -B
phase
W36H*-A, -B
230/208
C24H*-A, -B
1 or 3
C30H*-A, -B
phase
S26H*-C
S30H*-C
460
W30H*-C
3 phase
W36H*-C
C24H*-C
460
C30H*-C
3 phase
5. 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 3 on page
8).
IMPORTANT NOTE: Position front lip of ventilator
under front grille and on top of condenser partition
(as shown in Figure 3 insert). This is important
to ensure proper drainage of any water entering
damper assembly.
6. Open control panel to gain access to unit low
voltage terminal block. (Be sure all power is OFF
prior to opening the control panel.)
7. Route four low voltage electrical leads through the
7/8" bushing in control panel (Figure 3) into low
voltage box.
8. Temporarily connect leads with fork terminals to
corresponding points on terminal strip to terminals
C, R, G and A or O1 depending whether unit is a
heat pump or air conditioner (see Figure 4 on page
9).
NOTE: These 24 volt control wires control the
starting and stopping of the energy recovery
ventilator and can be independently controlled
by an energy management control or timer. See
separate section on Control Wiring.
9. Remove female plug of high voltage wiring harness
from the heat recovery assembly and snap into unit
control panel from the inside of the control panel
in the hole provided. Wire to terminal block. See
Figure 4 and wiring diagram.
10. Plug male plug from ERVF-*3/CHERV-*3 assembly
into female connector at back of control panel (see
Figures 3 and 4).
11. Replace inner and outer control panel covers.
12. Ventilator checkout:
A. Resupply power to unit.
B. Energize the evaporator blower by
switching thermostat to the manual fan
position with Heat/Cool in OFF position.
C. Ventilator heat transfer wheels should rotate
slowly (49 RPM). Intake and exhaust
blowers should run.
D. De-energize the evaporator blower. Energy
recovery heat transfer wheels and fresh air
and exhaust air blowers should stop.
E. This completes ventilator checkout.
14. Disconnect the wires temporarily connected in
Step 8.
15. Re-install the blower access and filter access
panels at top of unit and secure with sheet metal
screws.
Manual
2100-512B
Page
5 of 15
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