Outdoor Air Weatherhood; Exhaust Weatherhood; Dampers; Exhaust Air Damper Installation - Greenheck ERVe Installation, Operation And Maintenance Manual

Outdoor Air Weatherhood

Outdoor air weatherhood will be factory mounted.

Exhaust Weatherhood

The exhaust weatherhood is
shipped separately as a kit with
its own instructions.

Dampers

Backdraft dampers are always
included as an integral part of
the exhaust hood assemblies.
Motorized outdoor air and exhaust
air dampers are optional. Outdoor
air dampers are factory mounted
and wired at the intake. Exhaust
air dampers, depending on the
unit configuration, may require
final installation. If your unit is
configured as return air intake on
the end of the unit, the exhaust
air damper is factory installed and wired. If your
unit is configured with the return air intake location
on the bottom, final installation is required per the
instructions provided.

Exhaust Air Damper Installation

(Bottom return air intake configuration only)
1. Open the exhaust air filter and wheel access door.
2. Remove exhaust air filters and possibly the energy
wheel for more working area inside the unit.
3. Remove the two screws
holding the damper in
place as shown (save
screws for step 7).
4. Bend the brackets
holding the damper
out and away from
the damper as shown
in the Part Removal
drawing. Use caution
while executing this
step, as the damper
is heavy. Guide it
into place gently and
avoid dropping it, as
damage may occur.
5. Once the damper is
positioned as shown
in the Part Removal
drawing, remove the
four (4) screws holding
the shipping brackets
in place.
6. Remove the shipping
brackets and discard.
7. Insert screws removed in step 3 through the
damper flange in the same location they were
removed from.
8 Energy Recovery Ventilator
Shipping Location
Step 4
Step 5
Step 4
Part Removal
Final Installation

Electrical Information

The unit must be electrically grounded in accordance
with the current National Electrical Code, ANSI/NFPA
70. In Canada, use current CSA Standard C22.1,
Canadian Electrical Code, Part 1. In addition, the
installer should be aware of any local ordinances or
electrical company requirements that might apply.
System power wiring must be properly fused and
conform to the local and national electrical codes.
System power wiring is to the unit main disconnect
(door interlocking disconnect switch standard
on most units) or distribution block and must be
compatible with the ratings on the nameplate: supply
power voltage, phase, and amperage (Minimum
Circuit Amps - MCA, Maximum Overcurrent Protection
- MOP). All wiring beyond this point has been done
by the manufacturer and cannot be modified without
affecting the unit's agency / safety certification.
If field installing an additional disconnect switch, it
is recommended that there is at least four feet of
service room between the switch and system access
panels. When providing or replacing fuses in a fusible
disconnect, use dual element time delay fuses and
size according to the rating plate.
If power supply is desired through bottom of unit, run
the wiring through the curb, cut a hole in the cabinet
bottom, and wire to the disconnect switch. Seal
penetration in cabinet bottom to prevent leakage.
The electric supply to the unit must meet stringent
requirements for the system to operate properly.
Voltage supply and voltage imbalance between
phases should be within the following tolerances.
If the power is not within these voltage tolerances,
contact the power company prior to operating the
system.
Voltage Supply: See voltage use range on the rating
plate. Measure and record each supply leg voltage at
all line disconnect switches. Readings must fall within
the allowable range on the rating plate.
Voltage Imbalance: In a 3-phase system, excessive
voltage imbalance between phases will cause motors
to overheat and eventually fail. Maximum allowable
imbalance is 2%. To determine voltage imbalance,
use recorded voltage measurements in this formula.
Key: V1, V2, V3 = line voltages as measured
VA (average) = (V1 + V2 + V3) / 3
VD = Line voltage (V1, V2 or V3) that
deviates farthest from average (VA)
Formula: % Voltage Imbalance = [100 x (VA-VD)] / VA