Energy Recovery Ventilator
12
®
System Start-Up -
continued
General
Check all fasteners and set screws for tightness. This is
especially important for bearings and fan wheels Also,
if dampers are not motorized, check that they open and
close without binding.
Check Voltage
Before starting the unit compare the supplied voltage
with the unit’s nameplate voltage and the motor voltage.
Energy Recovery Wheel
First, follow the instructions for pulling the energy
recovery cassette halfway out of the unit.
Air Seals
— turn the energy recovery wheel by hand to
verify free operation. Check that the air seals, located
around the outside of the wheel and across the center
(both sides of wheel), are secure and in good condition.
Air seals which are too tight will prevent proper rotation
of the energy recovery wheel. Recheck the air seals
for tightness. Air seal clearance may be checked by
placing a sheet of paper, like a feeler gauge, against
the wheel face. To adjust the air seals, loosen all eight
seal retaining screws. These screws are located on the
bearing support that spans the length of the cassette
through the wheel center. Tighten the screws so the air
seals tug slightly on the sheet of paper as the wheel is
turned.
Replace cassette into unit, plug in wheel drive, replace
access door and apply power. Observe that the wheel
rotates freely. If wheel does not rotate or is binding,
remove the cassette; instructions provided on page 13.
Check Blower Wheel Rotation
First, hand rotate the blower to ensure that the wheel is
not rubbing against the scroll. If the blower is rotating in
the wrong direction, the unit will move some air but not
perform properly.
To check the rotation,
open the blower
access panel, which is
labeled either supply
or exhaust, and run the
blower momentarily to
determine the rotation.
Air Volume Check and Measurement
Along with the building balance, the unit’s airflow (cfm)
should be measured and compared with its rated air
volume. The MiniVent is direct drive, therefore balancing
dampers or speed controls are required for airflow
balancing. Air volume measurement must be conducted
with access doors on the unit.
The most accurate way to measure the air volume is by
using the pitot traverse method in the ductwork away
from the blower. Other methods can be used but should
be proven and accurate.
To adjust the air volume, change the fan rpm or the
system static pressure. See Troubleshooting section in
this guide.
With all access panels on the unit, compare measured
amps to the motor nameplate full load amps and correct
if overamping.
Measure Motor Voltage, Amperage and Fan
RPM
All access doors must be installed, run the
measurement leads through the provided electrical
access hole in the bottom access panel of the MiniVent.
Measure and record the input voltage and motor
amperage(s).
To measure the fan rpm, the blower door will need to
be removed. Minimize measurement time because the
motor may overamp with the door removed.
Do not
operate units with access doors/panels open as the
motors will overload.
With all access panels on the unit, compare measured
amps to the motor nameplate full load amps and correct
if overamping.
Airflow
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Forward Curved
WARNING
Disconnect all electrical power to the MiniVent prior
to inspection or servicing. Failure to comply with this
safety precaution could result in serious injury or
death.
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury
or death. Read the installation, operating, and
maintenance instructions thoroughly before installing
or servicing this equipment.
After the MiniVent has been put into operation, an
annual inspection and maintenance program should be
set-up to preserve reliability and performance.
The MiniVent energy recovery ventilator requires
very little maintenance. However, small problems
left unchecked, over time, could lead to loss of
performance or early motor failure. We recommend that
the unit be inspected once or twice a year.
The motor should be checked for lubrication at this
time. Lubricate only those motors which have an oil hole
provided. A few drops of all-purpose oil (SAE 20) will be
sufficient.
Fasteners and Set Screws
Any fan vibration has a tendency to loosen mechanical
fasteners. A periodic inspection should include
checking all fasteners and set screws for tightness.
Particular attention should be paid to set screws
attaching the fan wheel to the shaft and the shaft to
the bearings. Loose bearing set screws will lead to
premature failure of the fan shaft.
Routine Maintenance
