Start-Up And Operation - PennBarry DYNAMO Operation & Maintenance Manual

START-UP AND OPERATION

Carefully inspect the unit before start-up. All motor bearings should be properly lubricated (belt driven units only), and all fasteners
should be securely tightened. Rotate blower wheels by hand to ensure free movement. Make sure the inlets and approaches to the
exhauster are clean and free from obstruction. To ensure maximum air movement, adequate supply air must be available.
Rough shipping or handling may cause the wheel or propeller to move away from the venturi inlet. That condition can cause the fan
to move less air. If that occurs, loosen set screws and adjust the impeller closer to the inlet. Retighten all hardware securely.
Belt Tension Check-Up (Belt Driven Units Only)
Check condition of belts and the amount of tension prior to start-up. When it becomes necessary to adjust belt tension, do not
overtighten as bearing damage will occur. Recommended belt tension should permit deflection of 1/64" per inch of span of the
belt on each side of the belt measured halfway between the pulley centerline. Exercise extreme care when adjusting belts as not to
misalign the pulleys. Any misalignment will cause a sharp reduction in belt life and produce squeaky, annoying noises (See figure 1).
On units equipped with two or three groove pulleys, adjust all belts with equal tension.
Whenever belts are removed or installed, never force belts over pulleys without loosening motor first to relieve belt tension.
CAUTION
Before applying power to the motor, check the following:
1. Turn off and LOCK OUT the power source.
2. Check line voltage with motor nameplate.
3. On single phase motors, set-up the terminal blocks in accordance with the nameplate instructions (or wiring diagram). The set
up must match the line voltage.
4. If the motor is three phase, group and connect the winding leads as shown on the wiring diagram. The line voltage must
correspond with proper grouping of motor leads.
5. On two speed motors, follow the wiring diagram explicitly, or serious motor damage will occur.
6. For ECM direct driven motors, make sure that the integrated potentiometer is adjusted to its minimum set point by rotating it
counter clockwise until you reach its stop before starting fan.
7. Activate the blower and allow it to operate.
8. For ECM direct driven motors, slowly start adjusting the pot to the desired motor RPM.
9. Carefully check the rotation of the wheel to ensure operation in the proper direction.
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Figure 1: Pulley Alignment
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