Start-Up Components - Greenheck ECV Series Installation, Operation And Maintenance Manual

Start-Up Components

Forward-Curved Fans
Model ECV-10 contains two, direct drive forward curved
(1 supply and 1 exhaust)
fans. These forward curved
fans should be checked
for free rotation. If any
binding occurs, check for
concealed damage and
foreign objects in the fan
housing.
Mixed Flow Plenum Fans
Model ECV-20 contains two, direct drive mixed flow
plenum (1 supply and 1 exhaust)
fans. Model ECV-30 and ECV-40
contain four, direct drive mixed flow
plenum (2 supply and 2 exhaust)
fans. Mixed flow plenum fans are
single width, single inlet fans. The
impellers are unhoused with blades
that curve away from the direction
of rotation. These fans throw the air
radially outward, approximately 45
degrees from the inlet direction.
Mixed Flow Plenum Fan Alignment
If necessary, adjust wheel position by loosening the
wheel hub from the motor shaft. Adjust wheel position
so that a straight edge held tight to the wheel cone just
touches the inlet cone.
Wheel Cone
Gap
Inlet Cone
Mixed Flow Alignment
Fan Performance Modifications
CAUTION
When operating conditions of the fan are to be
changed (speed, pressure, temperature, etc.), consult
Greenheck to determine if the unit can operate safely
at the new conditions.
Start-up technician must check blower amperage to
ensure that the amperage listed on the motor nameplate
is not exceeded. Amperage to be tested with access
doors closed and ductwork installed.
®
Forward-Curved
Mixed Flow
Plenum
Straight Edge
Direction of Fan Wheel Rotation
Blower access is labeled on unit. Check for proper
wheel rotation by momentarily energizing the fan.
Rotation is determined by viewing the wheel from the
drive side and should match the rotation decal affixed
to the fan housing (see Rotation Direction figures). If
the wheel is rotating the wrong way, direction can be
reversed by interchanging any two of the three electrical
leads. Check for unusual noise or vibration. Refer to
the Troubleshooting section of this manual if a problem
develops.
Forward-Curved Fan Rotation
Mixed Flow Plenum Rotation
(Always counterclockwise as viewed from inlet)
Fan RPM
Supply fan(s) and exhaust fan(s) shall be preset at the
factory to the customer specified RPM. Any increase in
fan speed represents a substantial increase in load on
the motor. Always check the motor amperage reading
and compare it to the amperage rating shown on the
motor nameplate when changing fan RPM. All access
doors must be installed except the control center door.
Do not operate units with access doors open or
without proper ductwork in place as the fan motors
will overload.
Energy Core Ventilator 15