General; Check Voltage; Blower Wheel Rotation; Air Volume Check & Measurement - Greenheck MiniCore 5 Installation, Operation And Maintenance Manual

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.
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,
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 MiniCore 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.
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 MiniCore.
Measure and record the input voltage and motor
amperage(s).
With all access panels on the unit, compare measured
amps to the motor nameplate full load amps and correct
if overamping.
®
Airflow
Forward Curved

Routine Maintenance

WARNING
Disconnect all electrical power to the MiniCore 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 MiniCore has been put into operation, an
annual inspection and maintenance program should be
set-up to preserve reliability and performance.
The MiniCore 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 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. Loose bearing set
screws will lead to premature failure of the fan shaft.

Removal of Dust and Dirt

The fan motor and wheel(s) should be checked for
dust and dirt accumulation. Dirt buildup clogs cooling
openings on the motor housing and causes motor
overheating. Dirt buildup can contaminate bearing
lubricant and collect on fan wheel blades causing loss
of performance or premature failure. Cleaning can be
accomplished by brushing off any dust that may have
accumulated. Under no circumstances should motors or
bearings be sprayed with steam or water. Even filtered
units can accumulate build up and should be checked
when cleaning filters.
Maintenance to these components is achieved through
the provided access panels.
Internal Filter Maintenance
Opening the access panel provides access to the two
inches deep, pleated
30% efficient filters.
These filters should
be checked regularly
and cleaned or
replaced as needed.
Internal
MiniCore Quantity
Filter Size
5
15 x 20
10
20 x 20
MiniCore
2
2
9